annotate main/MainWindow.cpp @ 2090:0a93e653e107 spectrogramparam

Use log-frequency rather than log-bin for calculating x coord in spectrum. This has the advantage that frequency positions don't move when we change the window size or oversampling ratio, but it does give us an unhelpfully large amount of space for very low frequencies - to be considered

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006-2007 Chris Cannam and QMUL.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#include "../version.h"

#include "MainWindow.h"
#include "PreferencesDialog.h"

#include "view/Pane.h"
#include "view/PaneStack.h"
#include "data/model/WaveFileModel.h"
#include "data/model/SparseOneDimensionalModel.h"
#include "data/model/RangeSummarisableTimeValueModel.h"
#include "data/model/NoteModel.h"
#include "data/model/AggregateWaveModel.h"
#include "data/model/Labeller.h"
#include "data/osc/OSCQueue.h"
#include "framework/Document.h"
#include "framework/TransformUserConfigurator.h"
#include "view/ViewManager.h"
#include "base/Preferences.h"
#include "base/ResourceFinder.h"
#include "base/RecordDirectory.h"
#include "layer/WaveformLayer.h"
#include "layer/TimeRulerLayer.h"
#include "layer/TimeInstantLayer.h"
#include "layer/TimeValueLayer.h"
#include "layer/NoteLayer.h"
#include "layer/Colour3DPlotLayer.h"
#include "layer/SliceLayer.h"
#include "layer/SliceableLayer.h"
#include "layer/ImageLayer.h"
#include "layer/RegionLayer.h"
#include "view/Overview.h"
#include "widgets/PropertyBox.h"
#include "widgets/PropertyStack.h"
#include "widgets/AudioDial.h"
#include "widgets/LevelPanWidget.h"
#include "widgets/LevelPanToolButton.h"
#include "widgets/IconLoader.h"
#include "widgets/LayerTreeDialog.h"
#include "widgets/ListInputDialog.h"
#include "widgets/SubdividingMenu.h"
#include "widgets/NotifyingPushButton.h"
#include "widgets/KeyReference.h"
#include "widgets/TransformFinder.h"
#include "widgets/LabelCounterInputDialog.h"
#include "widgets/ActivityLog.h"
#include "widgets/UnitConverter.h"
#include "widgets/ProgressDialog.h"
#include "widgets/CSVAudioFormatDialog.h"
#include "audio/AudioCallbackPlaySource.h"
#include "audio/AudioCallbackRecordTarget.h"
#include "audio/PlaySpeedRangeMapper.h"
#include "data/fileio/DataFileReaderFactory.h"
#include "data/fileio/PlaylistFileReader.h"
#include "data/fileio/WavFileWriter.h"
#include "data/fileio/CSVFileWriter.h"
#include "data/fileio/MIDIFileWriter.h"
#include "data/fileio/BZipFileDevice.h"
#include "data/fileio/FileSource.h"
#include "data/midi/MIDIInput.h"
#include "base/RecentFiles.h"
#include "plugin/PluginScan.h"
#include "transform/TransformFactory.h"
#include "transform/ModelTransformerFactory.h"
#include "base/PlayParameterRepository.h"
#include "base/XmlExportable.h"
#include "widgets/CommandHistory.h"
#include "base/Profiler.h"
#include "base/Clipboard.h"
#include "base/UnitDatabase.h"
#include "layer/ColourDatabase.h"
#include "widgets/ModelDataTableDialog.h"
#include "rdf/PluginRDFIndexer.h"
#include "rdf/RDFExporter.h"

#include "Surveyer.h"
#include "NetworkPermissionTester.h"
#include "framework/VersionTester.h"

// For version information
#include <vamp/vamp.h>
#include <vamp-hostsdk/PluginBase.h>
#include "plugin/api/ladspa.h"
#include "plugin/api/dssi.h"

#include <bqaudioio/SystemPlaybackTarget.h>
#include <bqaudioio/SystemAudioIO.h>

#include <QApplication>
#include <QMessageBox>
#include <QGridLayout>
#include <QLabel>
#include <QAction>
#include <QMenuBar>
#include <QToolBar>
#include <QInputDialog>
#include <QStatusBar>
#include <QTreeView>
#include <QFile>
#include <QFileInfo>
#include <QDir>
#include <QTextStream>
#include <QTextCodec>
#include <QProcess>
#include <QShortcut>
#include <QSettings>
#include <QDateTime>
#include <QProcess>
#include <QCheckBox>
#include <QRegExp>
#include <QScrollArea>
#include <QCloseEvent>
#include <QDialogButtonBox>
#include <QFileSystemWatcher>
#include <QTextEdit>

#include <iostream>
#include <cstdio>
#include <errno.h>

using std::vector;
using std::map;
using std::set;


MainWindow::MainWindow(SoundOptions options, bool withOSCSupport) :
    MainWindowBase(options),
    m_overview(0),
    m_mainMenusCreated(false),
    m_paneMenu(0),
    m_layerMenu(0),
    m_transformsMenu(0),
    m_playbackMenu(0),
    m_existingLayersMenu(0),
    m_sliceMenu(0),
    m_recentFilesMenu(0),
    m_recentTransformsMenu(0),
    m_templatesMenu(0),
    m_rightButtonMenu(0),
    m_rightButtonLayerMenu(0),
    m_rightButtonTransformsMenu(0),
    m_rightButtonPlaybackMenu(0),
    m_soloAction(0),
    m_rwdStartAction(0),
    m_rwdSimilarAction(0),
    m_rwdAction(0),
    m_ffwdAction(0),
    m_ffwdSimilarAction(0),
    m_ffwdEndAction(0),
    m_playAction(0),
    m_recordAction(0),
    m_playSelectionAction(0),
    m_playLoopAction(0),
    m_soloModified(false),
    m_prevSolo(false),
    m_playControlsSpacer(0),
    m_playControlsWidth(0),
    m_preferencesDialog(0),
    m_layerTreeDialog(0),
    m_activityLog(new ActivityLog()),
    m_unitConverter(new UnitConverter()),
    m_keyReference(new KeyReference()),
    m_templateWatcher(0)
{
    Profiler profiler("MainWindow::MainWindow");

    SVDEBUG << "MainWindow: " << getReleaseText() << endl;

    setWindowTitle(QApplication::applicationName());

    UnitDatabase *udb = UnitDatabase::getInstance();
    udb->registerUnit("Hz");
    udb->registerUnit("dB");
    udb->registerUnit("s");

    ColourDatabase *cdb = ColourDatabase::getInstance();
    cdb->addColour(Qt::black, tr("Black"));
    cdb->addColour(Qt::darkRed, tr("Red"));
    cdb->addColour(Qt::darkBlue, tr("Blue"));
    cdb->addColour(Qt::darkGreen, tr("Green"));
    cdb->addColour(QColor(200, 50, 255), tr("Purple"));
    cdb->addColour(QColor(255, 150, 50), tr("Orange"));
    cdb->setUseDarkBackground(cdb->addColour(Qt::white, tr("White")), true);
    cdb->setUseDarkBackground(cdb->addColour(Qt::red, tr("Bright Red")), true);
    cdb->setUseDarkBackground(cdb->addColour(QColor(30, 150, 255), tr("Bright Blue")), true);
    cdb->setUseDarkBackground(cdb->addColour(Qt::green, tr("Bright Green")), true);
    cdb->setUseDarkBackground(cdb->addColour(QColor(225, 74, 255), tr("Bright Purple")), true);
    cdb->setUseDarkBackground(cdb->addColour(QColor(255, 188, 80), tr("Bright Orange")), true);

    SVDEBUG << "MainWindow: Creating main user interface layout" << endl;

    QFrame *frame = new QFrame;
    setCentralWidget(frame);

    QGridLayout *layout = new QGridLayout;

    m_descriptionLabel = new QLabel;

    m_mainScroll = new QScrollArea(frame);
    m_mainScroll->setWidgetResizable(true);
    m_mainScroll->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    m_mainScroll->setFrameShape(QFrame::NoFrame);

    m_mainScroll->setWidget(m_paneStack);

    m_overview = new Overview(frame);
    m_overview->setViewManager(m_viewManager);
    int overviewHeight = m_viewManager->scalePixelSize(35);
    if (overviewHeight < 40) overviewHeight = 40;
    m_overview->setFixedHeight(overviewHeight);
#ifndef _WIN32
    // For some reason, the contents of the overview never appear if we
    // make this setting on Windows.  I have no inclination at the moment
    // to track down the reason why.
    m_overview->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
#endif
    connect(m_overview, SIGNAL(contextHelpChanged(const QString &)),
            this, SLOT(contextHelpChanged(const QString &)));

    m_panLayer = new WaveformLayer;
    m_panLayer->setChannelMode(WaveformLayer::MergeChannels);
    m_panLayer->setAggressiveCacheing(true);
    m_overview->addLayer(m_panLayer);

    coloursChanged(); // sets pan layer colour from preferences

    m_playSpeed = new AudioDial(frame);
    m_playSpeed->setMinimum(0);
    m_playSpeed->setMaximum(120);
    m_playSpeed->setValue(60);
    m_playSpeed->setFixedWidth(overviewHeight);
    m_playSpeed->setFixedHeight(overviewHeight);
    m_playSpeed->setNotchesVisible(true);
    m_playSpeed->setPageStep(10);
    m_playSpeed->setObjectName(tr("Playback Speed"));
    m_playSpeed->setRangeMapper(new PlaySpeedRangeMapper);
    m_playSpeed->setDefaultValue(60);
    m_playSpeed->setShowToolTip(true);
    connect(m_playSpeed, SIGNAL(valueChanged(int)),
            this, SLOT(playSpeedChanged(int)));
    connect(m_playSpeed, SIGNAL(mouseEntered()), this, SLOT(mouseEnteredWidget()));
    connect(m_playSpeed, SIGNAL(mouseLeft()), this, SLOT(mouseLeftWidget()));

    m_mainLevelPan = new LevelPanToolButton(frame);
    connect(m_mainLevelPan, SIGNAL(mouseEntered()), this, SLOT(mouseEnteredWidget()));
    connect(m_mainLevelPan, SIGNAL(mouseLeft()), this, SLOT(mouseLeftWidget()));
    m_mainLevelPan->setFixedHeight(overviewHeight);
    m_mainLevelPan->setFixedWidth(overviewHeight);
    m_mainLevelPan->setImageSize((overviewHeight * 3) / 4);
    m_mainLevelPan->setBigImageSize(overviewHeight * 3);

    m_playControlsSpacer = new QFrame;

    layout->setSpacing(m_viewManager->scalePixelSize(4));
    layout->addWidget(m_mainScroll, 0, 0, 1, 4);
    layout->addWidget(m_overview, 1, 0);
    layout->addWidget(m_playSpeed, 1, 1);
    layout->addWidget(m_playControlsSpacer, 1, 2);
    layout->addWidget(m_mainLevelPan, 1, 3);

    m_playControlsWidth = 
        m_mainLevelPan->width() + m_playSpeed->width() + layout->spacing() * 2;

    m_paneStack->setPropertyStackMinWidth(m_playControlsWidth
                                          + 2 + layout->spacing());
    m_playControlsSpacer->setFixedSize(QSize(2, 2));

    layout->setColumnStretch(0, 10);

    connect(m_paneStack, SIGNAL(propertyStacksResized(int)),
            this, SLOT(propertyStacksResized(int)));

    frame->setLayout(layout);

    SVDEBUG << "MainWindow: Creating menus and toolbars" << endl;

#ifdef Q_OS_MAC
    // Mac doesn't align menu labels when icons are shown: result is messy
    QApplication::setAttribute(Qt::AA_DontShowIconsInMenus);
    setIconsVisibleInMenus(false);
#endif

    setupMenus();
    setupToolbars();
    setupHelpMenu();

    statusBar();
    m_currentLabel = new QLabel;
    statusBar()->addPermanentWidget(m_currentLabel);

    finaliseMenus();

    connect(m_viewManager, SIGNAL(activity(QString)),
            m_activityLog, SLOT(activityHappened(QString)));
    connect(m_playSource, SIGNAL(activity(QString)),
            m_activityLog, SLOT(activityHappened(QString)));
    connect(CommandHistory::getInstance(), SIGNAL(activity(QString)),
            m_activityLog, SLOT(activityHappened(QString)));
    connect(this, SIGNAL(activity(QString)),
            m_activityLog, SLOT(activityHappened(QString)));
    connect(this, SIGNAL(replacedDocument()), this, SLOT(documentReplaced()));

    m_activityLog->hide();

    m_unitConverter->hide();

    setAudioRecordMode(RecordCreateAdditionalModel);

    SVDEBUG << "MainWindow: Creating new session" << endl;

    newSession();

    connect(m_midiInput, SIGNAL(eventsAvailable()),
            this, SLOT(midiEventsAvailable()));

    SVDEBUG << "MainWindow: Creating network permission tester" << endl;

    NetworkPermissionTester tester(withOSCSupport);
    bool networkPermission = tester.havePermission();
    if (networkPermission) {
        if (withOSCSupport) {
            SVDEBUG << "MainWindow: Creating OSC queue" << endl;
            startOSCQueue();
        }

        SVDEBUG << "MainWindow: Starting transform population thread" << endl;
        TransformFactory::getInstance()->startPopulationThread();

        SVDEBUG << "MainWindow: Creating surveyer" << endl;
        m_surveyer = new Surveyer
            ("sonicvisualiser.org", "survey23-present.txt", "survey23.php");

        SVDEBUG << "MainWindow: Creating version tester" << endl;
        m_versionTester = new VersionTester
            ("sonicvisualiser.org", "latest-version.txt", SV_VERSION);
        connect(m_versionTester, SIGNAL(newerVersionAvailable(QString)),
                this, SLOT(newerVersionAvailable(QString)));
    } else {
        m_surveyer = 0;
        m_versionTester = 0;
    }

/*
    QTimer::singleShot(500, this, SLOT(betaReleaseWarning()));
*/
    
    QString warning = PluginScan::getInstance()->getStartupFailureReport();
    if (warning != "") {
        QTimer::singleShot(500, this, SLOT(pluginPopulationWarning()));
    }

    SVDEBUG << "MainWindow: Constructor done" << endl;
}

MainWindow::~MainWindow()
{
//    SVDEBUG << "MainWindow::~MainWindow" << endl;
    delete m_keyReference;
    delete m_activityLog;
    delete m_unitConverter;
    delete m_preferencesDialog;
    delete m_layerTreeDialog;
    delete m_versionTester;
    delete m_surveyer;
    Profiles::getInstance()->dump();
//    SVDEBUG << "MainWindow::~MainWindow finishing" << endl;
}

void
MainWindow::setupMenus()
{
    if (!m_mainMenusCreated) {

#ifdef Q_OS_LINUX
        // In Ubuntu 14.04 the window's menu bar goes missing entirely
        // if the user is running any desktop environment other than Unity
        // (in which the faux single-menubar appears). The user has a
        // workaround, to remove the appmenu-qt5 package, but that is
        // awkward and the problem is so severe that it merits disabling
        // the system menubar integration altogether. Like this:
        menuBar()->setNativeMenuBar(false);  // fix #1039
#endif
        
        m_rightButtonMenu = new QMenu();

        // We don't want tear-off enabled on the right-button menu.
        // If it is enabled, then simply right-clicking and releasing
        // will pop up the menu, activate the tear-off, and leave the
        // torn-off menu window in front of the main window.  That
        // isn't desirable.
        m_rightButtonMenu->setTearOffEnabled(false);
    }

    if (m_rightButtonTransformsMenu) {
        m_rightButtonTransformsMenu->clear();
    } else {
        m_rightButtonTransformsMenu = m_rightButtonMenu->addMenu(tr("&Transform"));
        m_rightButtonTransformsMenu->setTearOffEnabled(true);
        m_rightButtonMenu->addSeparator();
    }

    // This will be created (if not found) or cleared (if found) in
    // setupPaneAndLayerMenus, but we want to ensure it's created
    // sooner so it can go nearer the top of the right button menu
    if (m_rightButtonLayerMenu) {
        m_rightButtonLayerMenu->clear();
    } else {
        m_rightButtonLayerMenu = m_rightButtonMenu->addMenu(tr("&Layer"));
        m_rightButtonLayerMenu->setTearOffEnabled(true);
        m_rightButtonMenu->addSeparator();
    }

    if (!m_mainMenusCreated) {
        CommandHistory::getInstance()->registerMenu(m_rightButtonMenu);
        m_rightButtonMenu->addSeparator();
    }

    setupFileMenu();
    setupEditMenu();
    setupViewMenu();
    setupPaneAndLayerMenus();
    setupTransformsMenu();

    m_mainMenusCreated = true;
}

void
MainWindow::goFullScreen()
{
    if (m_viewManager->getZoomWheelsEnabled()) {
        // The wheels seem to end up in the wrong place in full-screen mode
        toggleZoomWheels();
    }

    QWidget *ps = m_mainScroll->takeWidget();
    ps->setParent(0);

    QShortcut *sc;

    sc = new QShortcut(QKeySequence("Esc"), ps);
    connect(sc, SIGNAL(activated()), this, SLOT(endFullScreen()));

    sc = new QShortcut(QKeySequence("F11"), ps);
    connect(sc, SIGNAL(activated()), this, SLOT(endFullScreen()));

    QAction *acts[] = {
        m_playAction, m_zoomInAction, m_zoomOutAction, m_zoomFitAction,
        m_scrollLeftAction, m_scrollRightAction, m_showPropertyBoxesAction
    };

    for (int i = 0; i < int(sizeof(acts)/sizeof(acts[0])); ++i) {
        sc = new QShortcut(acts[i]->shortcut(), ps);
        connect(sc, SIGNAL(activated()), acts[i], SLOT(trigger()));
    }

    ps->showFullScreen();
}

void
MainWindow::endFullScreen()
{
    // these were only created in goFullScreen:
    QObjectList cl = m_paneStack->children();
    foreach (QObject *o, cl) {
        QShortcut *sc = qobject_cast<QShortcut *>(o);
        if (sc) delete sc;
    }

    m_paneStack->showNormal();
    m_mainScroll->setWidget(m_paneStack);
}

void
MainWindow::setupFileMenu()
{
    if (m_mainMenusCreated) return;

    QMenu *menu = menuBar()->addMenu(tr("&File"));
    menu->setTearOffEnabled(true);
    QToolBar *toolbar = addToolBar(tr("File Toolbar"));

    m_keyReference->setCategory(tr("File and Session Management"));

    IconLoader il;

    QIcon icon = il.load("filenew");
    QAction *action = new QAction(icon, tr("&New Session"), this);
    action->setShortcut(tr("Ctrl+N"));
    action->setStatusTip(tr("Abandon the current %1 session and start a new one").arg(QApplication::applicationName()));
    connect(action, SIGNAL(triggered()), this, SLOT(newSession()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    toolbar->addAction(action);

    icon = il.load("fileopen");
    action = new QAction(icon, tr("&Open..."), this);
    action->setShortcut(tr("Ctrl+O"));
    action->setStatusTip(tr("Open a session file, audio file, or layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(openSomething()));
    m_keyReference->registerShortcut(action);
    toolbar->addAction(action);
    menu->addAction(action);

    // We want this one to go on the toolbar now, if we add it at all,
    // but on the menu later
    QAction *iaction = new QAction(tr("&Import More Audio..."), this);
    iaction->setShortcut(tr("Ctrl+I"));
    iaction->setStatusTip(tr("Import an extra audio file into a new pane"));
    connect(iaction, SIGNAL(triggered()), this, SLOT(importMoreAudio()));
    connect(this, SIGNAL(canImportMoreAudio(bool)), iaction, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(iaction);

    // We want this one to go on the toolbar now, if we add it at all,
    // but on the menu later
    QAction *raction = new QAction(tr("Replace &Main Audio..."), this);
    raction->setStatusTip(tr("Replace the main audio file of the session with a different file"));
    connect(raction, SIGNAL(triggered()), this, SLOT(replaceMainAudio()));
    connect(this, SIGNAL(canReplaceMainAudio(bool)), raction, SLOT(setEnabled(bool)));

    action = new QAction(tr("Open Lo&cation..."), this);
    action->setShortcut(tr("Ctrl+Shift+O"));
    action->setStatusTip(tr("Open or import a file from a remote URL"));
    connect(action, SIGNAL(triggered()), this, SLOT(openLocation()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    m_recentFilesMenu = menu->addMenu(tr("Open &Recent"));
    m_recentFilesMenu->setTearOffEnabled(true);
    setupRecentFilesMenu();
    connect(&m_recentFiles, SIGNAL(recentChanged()),
            this, SLOT(setupRecentFilesMenu()));

    menu->addSeparator();

    icon = il.load("filesave");
    action = new QAction(icon, tr("&Save Session"), this);
    action->setShortcut(tr("Ctrl+S"));
    action->setStatusTip(tr("Save the current session into a %1 session file").arg(QApplication::applicationName()));
    connect(action, SIGNAL(triggered()), this, SLOT(saveSession()));
    connect(this, SIGNAL(canSave(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    toolbar->addAction(action);
        
    icon = il.load("filesaveas");
    action = new QAction(icon, tr("Save Session &As..."), this);
    action->setShortcut(tr("Ctrl+Shift+S"));
    action->setStatusTip(tr("Save the current session into a new %1 session file").arg(QApplication::applicationName()));
    connect(action, SIGNAL(triggered()), this, SLOT(saveSessionAs()));
    menu->addAction(action);
    toolbar->addAction(action);

    menu->addSeparator();

    // the Replace action we made earlier
    menu->addAction(raction);

    // the Import action we made earlier
    menu->addAction(iaction);

    action = new QAction(tr("&Export Audio File..."), this);
    action->setStatusTip(tr("Export selection as an audio file"));
    connect(action, SIGNAL(triggered()), this, SLOT(exportAudio()));
    connect(this, SIGNAL(canExportAudio(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

    menu->addSeparator();

    action = new QAction(tr("Import Annotation &Layer..."), this);
    action->setShortcut(tr("Ctrl+L"));
    action->setStatusTip(tr("Import layer data from an existing file"));
    connect(action, SIGNAL(triggered()), this, SLOT(importLayer()));
    connect(this, SIGNAL(canImportLayer(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    action = new QAction(tr("Export Annotation La&yer..."), this);
    action->setShortcut(tr("Ctrl+Y"));
    action->setStatusTip(tr("Export layer data to a file"));
    connect(action, SIGNAL(triggered()), this, SLOT(exportLayer()));
    connect(this, SIGNAL(canExportLayer(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    menu->addSeparator();
    
    action = new QAction(tr("Convert Audio from Data File..."), this);
    action->setStatusTip(tr("Convert and import audio sample values from a CSV data file"));
    connect(action, SIGNAL(triggered()), this, SLOT(convertAudio()));
    menu->addAction(action);
    
    action = new QAction(tr("Export Audio to Data File..."), this);
    action->setStatusTip(tr("Export audio from selection into a CSV data file"));
    connect(action, SIGNAL(triggered()), this, SLOT(exportAudioData()));
    connect(this, SIGNAL(canExportAudio(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

    menu->addSeparator();

    action = new QAction(tr("Export Image File..."), this);
    action->setStatusTip(tr("Export a single pane to an image file"));
    connect(action, SIGNAL(triggered()), this, SLOT(exportImage()));
    connect(this, SIGNAL(canExportImage(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

    action = new QAction(tr("Export SVG File..."), this);
    action->setStatusTip(tr("Export a single pane to a scalable SVG image file"));
    connect(action, SIGNAL(triggered()), this, SLOT(exportSVG()));
    connect(this, SIGNAL(canExportImage(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

    menu->addSeparator();

    action = new QAction(tr("Browse Recorded and Converted Audio"), this);
    action->setStatusTip(tr("Open the Recorded Audio folder in the system file browser"));
    connect(action, SIGNAL(triggered()), this, SLOT(browseRecordedAudio()));
    menu->addAction(action);

    menu->addSeparator();

    QString templatesMenuLabel = tr("Apply Session Template");
    m_templatesMenu = menu->addMenu(templatesMenuLabel);
    m_templatesMenu->setTearOffEnabled(true);
    // We need to have a main model for this option to be useful:
    // canExportAudio captures that
    connect(this, SIGNAL(canExportAudio(bool)), m_templatesMenu, SLOT(setEnabled(bool)));

    // Set up the menu in a moment, after m_manageTemplatesAction constructed

    action = new QAction(tr("Export Session as Template..."), this);
    connect(action, SIGNAL(triggered()), this, SLOT(saveSessionAsTemplate()));
    // We need to have something in the session for this to be useful:
    // canDeleteCurrentLayer captures that
    connect(this, SIGNAL(canExportAudio(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

    m_manageTemplatesAction = new QAction(tr("Manage Exported Templates"), this);
    connect(m_manageTemplatesAction, SIGNAL(triggered()), this, SLOT(manageSavedTemplates()));
    menu->addAction(m_manageTemplatesAction);

    setupTemplatesMenu();

    action = new QAction(tr("&Preferences..."), this);
    action->setStatusTip(tr("Adjust the application preferences"));
    connect(action, SIGNAL(triggered()), this, SLOT(preferences()));
    menu->addAction(action);
        
    menu->addSeparator();
    action = new QAction(il.load("exit"),
                         tr("&Quit"), this);
    action->setShortcut(tr("Ctrl+Q"));
    action->setStatusTip(tr("Exit %1").arg(QApplication::applicationName()));
    connect(action, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
}

void
MainWindow::setupEditMenu()
{
    if (m_mainMenusCreated) return;

    QMenu *menu = menuBar()->addMenu(tr("&Edit"));
    menu->setTearOffEnabled(true);
    CommandHistory::getInstance()->registerMenu(menu);

    m_keyReference->setCategory(tr("Editing"));

    menu->addSeparator();

    IconLoader il;

    QAction *action = new QAction(il.load("editcut"),
                                  tr("Cu&t"), this);
    action->setShortcut(tr("Ctrl+X"));
    action->setStatusTip(tr("Cut the selection from the current layer to the clipboard"));
    connect(action, SIGNAL(triggered()), this, SLOT(cut()));
    connect(this, SIGNAL(canEditSelection(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    action = new QAction(il.load("editcopy"),
                         tr("&Copy"), this);
    action->setShortcut(tr("Ctrl+C"));
    action->setStatusTip(tr("Copy the selection from the current layer to the clipboard"));
    connect(action, SIGNAL(triggered()), this, SLOT(copy()));
    connect(this, SIGNAL(canEditSelection(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    action = new QAction(il.load("editpaste"),
                         tr("&Paste"), this);
    action->setShortcut(tr("Ctrl+V"));
    action->setStatusTip(tr("Paste from the clipboard to the current layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(paste()));
    connect(this, SIGNAL(canPaste(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    action = new QAction(tr("Paste at Playback Position"), this);
    action->setShortcut(tr("Ctrl+Shift+V"));
    action->setStatusTip(tr("Paste from the clipboard to the current layer, placing the first item at the playback position"));
    connect(action, SIGNAL(triggered()), this, SLOT(pasteAtPlaybackPosition()));
    connect(this, SIGNAL(canPaste(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    m_deleteSelectedAction = new QAction(tr("&Delete Selected Items"), this);
    m_deleteSelectedAction->setShortcut(tr("Del"));
    m_deleteSelectedAction->setStatusTip(tr("Delete items in current selection from the current layer"));
    connect(m_deleteSelectedAction, SIGNAL(triggered()), this, SLOT(deleteSelected()));
    connect(this, SIGNAL(canDeleteSelection(bool)), m_deleteSelectedAction, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(m_deleteSelectedAction);
    menu->addAction(m_deleteSelectedAction);
    m_rightButtonMenu->addAction(m_deleteSelectedAction);

    menu->addSeparator();
    m_rightButtonMenu->addSeparator();

    m_keyReference->setCategory(tr("Selection"));

    action = new QAction(tr("Select &All"), this);
    action->setShortcut(tr("Ctrl+A"));
    action->setStatusTip(tr("Select the whole duration of the current session"));
    connect(action, SIGNAL(triggered()), this, SLOT(selectAll()));
    connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);
        
    action = new QAction(tr("Select &Visible Range"), this);
    action->setShortcut(tr("Ctrl+Shift+A"));
    action->setStatusTip(tr("Select the time range corresponding to the current window width"));
    connect(action, SIGNAL(triggered()), this, SLOT(selectVisible()));
    connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
        
    action = new QAction(tr("Select to &Start"), this);
    action->setShortcut(tr("Shift+Left"));
    action->setStatusTip(tr("Select from the start of the session to the current playback position"));
    connect(action, SIGNAL(triggered()), this, SLOT(selectToStart()));
    connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
        
    action = new QAction(tr("Select to &End"), this);
    action->setShortcut(tr("Shift+Right"));
    action->setStatusTip(tr("Select from the current playback position to the end of the session"));
    connect(action, SIGNAL(triggered()), this, SLOT(selectToEnd()));
    connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    action = new QAction(tr("C&lear Selection"), this);
    action->setShortcut(tr("Esc"));
    action->setStatusTip(tr("Clear the selection"));
    connect(action, SIGNAL(triggered()), this, SLOT(clearSelection()));
    connect(this, SIGNAL(canClearSelection(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    menu->addSeparator();

    m_keyReference->setCategory(tr("Tapping Time Instants"));

    action = new QAction(tr("&Insert Instant at Playback Position"), this);
    action->setShortcut(tr(";"));
    action->setStatusTip(tr("Insert a new time instant at the current playback position, in a new layer if necessary"));
    connect(action, SIGNAL(triggered()), this, SLOT(insertInstant()));
    connect(this, SIGNAL(canInsertInstant(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    // Historically this was the main shortcut for "Insert Instant at
    // Playback Position". Note that Enter refers to the keypad key,
    // rather than the Return key, so this doesn't actually exist on
    // many keyboards now. Accordingly the alternative shortcut ";"
    // has been promoted to primary, listed above. Same goes for the
    // shifted version below
    QString shortcut(tr("Enter"));
    connect(new QShortcut(shortcut, this), SIGNAL(activated()),
            this, SLOT(insertInstant()));
    m_keyReference->registerAlternativeShortcut(action, shortcut);

    action = new QAction(tr("Insert Instants at Selection &Boundaries"), this);
    action->setShortcut(tr("Shift+;"));
    action->setStatusTip(tr("Insert new time instants at the start and end of the current selected regions, in a new layer if necessary"));
    connect(action, SIGNAL(triggered()), this, SLOT(insertInstantsAtBoundaries()));
    connect(this, SIGNAL(canInsertInstantsAtBoundaries(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    shortcut = QString(tr("Shift+Enter"));
    connect(new QShortcut(shortcut, this), SIGNAL(activated()),
            this, SLOT(insertInstantsAtBoundaries()));
    m_keyReference->registerAlternativeShortcut(action, shortcut);

    // The previous two actions used shortcuts with the (keypad) Enter
    // key, while this one I (bizarrely) switched from Enter to Return
    // in September 2014. Let's make it consistent with the above by
    // making the primary shortcut for it Ctrl+Shift+; and keeping
    // both Return and Enter as synonyms for ;
    action = new QAction(tr("Insert Item at Selection"), this);
    action->setShortcut(tr("Ctrl+Shift+;"));
    action->setStatusTip(tr("Insert a new note or region item corresponding to the current selection"));
    connect(action, SIGNAL(triggered()), this, SLOT(insertItemAtSelection()));
    connect(this, SIGNAL(canInsertItemAtSelection(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    shortcut = QString(tr("Ctrl+Shift+Enter"));
    connect(new QShortcut(shortcut, this), SIGNAL(activated()),
            this, SLOT(insertItemAtSelection()));
    m_keyReference->registerAlternativeShortcut(action, shortcut);

    shortcut = QString(tr("Ctrl+Shift+Return"));
    connect(new QShortcut(shortcut, this), SIGNAL(activated()),
            this, SLOT(insertItemAtSelection()));
    // we had that one for historical compatibility, but let's not
    // register it publicly; having three shortcuts for such an
    // obscure function is really over-egging it

    menu->addSeparator();

    QMenu *numberingMenu = menu->addMenu(tr("Number New Instants with"));
    numberingMenu->setTearOffEnabled(true);
    QActionGroup *numberingGroup = new QActionGroup(this);

    Labeller::TypeNameMap types = m_labeller->getTypeNames();
    for (Labeller::TypeNameMap::iterator i = types.begin(); i != types.end(); ++i) {

        if (i->first == Labeller::ValueFromLabel ||
            i->first == Labeller::ValueFromExistingNeighbour) continue;

        action = new QAction(i->second, this);
        connect(action, SIGNAL(triggered()), this, SLOT(setInstantsNumbering()));
        action->setCheckable(true);
        action->setChecked(m_labeller->getType() == i->first);
        numberingGroup->addAction(action);
        numberingMenu->addAction(action);
        m_numberingActions[action] = (int)i->first;

        if (i->first == Labeller::ValueFromTwoLevelCounter) {

            QMenu *cycleMenu = numberingMenu->addMenu(tr("Cycle size"));
            QActionGroup *cycleGroup = new QActionGroup(this);

            int cycles[] = { 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 16 };
            for (int i = 0; i < int(sizeof(cycles)/sizeof(cycles[0])); ++i) {
                action = new QAction(QString("%1").arg(cycles[i]), this);
                connect(action, SIGNAL(triggered()), this, SLOT(setInstantsCounterCycle()));
                action->setCheckable(true);
                action->setChecked(cycles[i] == m_labeller->getCounterCycleSize());
                cycleGroup->addAction(action);
                cycleMenu->addAction(action);
            }
        }

        if (i->first == Labeller::ValueNone ||
            i->first == Labeller::ValueFromTwoLevelCounter ||
            i->first == Labeller::ValueFromRealTime) {
            numberingMenu->addSeparator();
        }
    }

    action = new QAction(tr("Reset Numbering Counters"), this);
    action->setStatusTip(tr("Reset to 1 all the counters used for counter-based labelling"));
    connect(action, SIGNAL(triggered()), this, SLOT(resetInstantsCounters()));
    connect(this, SIGNAL(replacedDocument()), action, SLOT(trigger()));
    menu->addAction(action);

    action = new QAction(tr("Set Numbering Counters..."), this);
    action->setStatusTip(tr("Set the counters used for counter-based labelling"));
    connect(action, SIGNAL(triggered()), this, SLOT(setInstantsCounters()));
    menu->addAction(action);
            
    action = new QAction(tr("Renumber Selected Instants"), this);
    action->setStatusTip(tr("Renumber the selected instants using the current labelling scheme"));
    connect(action, SIGNAL(triggered()), this, SLOT(renumberInstants()));
    connect(this, SIGNAL(canRenumberInstants(bool)), action, SLOT(setEnabled(bool)));
//    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    menu->addSeparator();
    
    action = new QAction(tr("Subdivide Selected Instants..."), this);
    action->setStatusTip(tr("Add new instants at regular intervals between the selected instants"));
    connect(action, SIGNAL(triggered()), this, SLOT(subdivideInstants()));
    connect(this, SIGNAL(canSubdivideInstants(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
            
    action = new QAction(tr("Winnow Selected Instants..."), this);
    action->setStatusTip(tr("Remove subdivisions, leaving only every Nth instant"));
    connect(action, SIGNAL(triggered()), this, SLOT(winnowInstants()));
    connect(this, SIGNAL(canWinnowInstants(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
}

void
MainWindow::setupViewMenu()
{
    if (m_mainMenusCreated) return;

    IconLoader il;

    QAction *action = 0;

    m_keyReference->setCategory(tr("Panning and Navigation"));

    QMenu *menu = menuBar()->addMenu(tr("&View"));
    menu->setTearOffEnabled(true);
    m_scrollLeftAction = new QAction(tr("Scroll &Left"), this);
    m_scrollLeftAction->setShortcut(tr("Left"));
    m_scrollLeftAction->setStatusTip(tr("Scroll the current pane to the left"));
    connect(m_scrollLeftAction, SIGNAL(triggered()), this, SLOT(scrollLeft()));
    connect(this, SIGNAL(canScroll(bool)), m_scrollLeftAction, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(m_scrollLeftAction);
    menu->addAction(m_scrollLeftAction);
        
    m_scrollRightAction = new QAction(tr("Scroll &Right"), this);
    m_scrollRightAction->setShortcut(tr("Right"));
    m_scrollRightAction->setStatusTip(tr("Scroll the current pane to the right"));
    connect(m_scrollRightAction, SIGNAL(triggered()), this, SLOT(scrollRight()));
    connect(this, SIGNAL(canScroll(bool)), m_scrollRightAction, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(m_scrollRightAction);
    menu->addAction(m_scrollRightAction);
        
    action = new QAction(tr("&Jump Left"), this);
    action->setShortcut(tr("Ctrl+Left"));
    action->setStatusTip(tr("Scroll the current pane a big step to the left"));
    connect(action, SIGNAL(triggered()), this, SLOT(jumpLeft()));
    connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
        
    action = new QAction(tr("J&ump Right"), this);
    action->setShortcut(tr("Ctrl+Right"));
    action->setStatusTip(tr("Scroll the current pane a big step to the right"));
    connect(action, SIGNAL(triggered()), this, SLOT(jumpRight()));
    connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    action = new QAction(tr("Peek Left"), this);
    action->setShortcut(tr("Alt+Left"));
    action->setStatusTip(tr("Scroll the current pane to the left without moving the playback cursor or other panes"));
    connect(action, SIGNAL(triggered()), this, SLOT(peekLeft()));
    connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
        
    action = new QAction(tr("Peek Right"), this);
    action->setShortcut(tr("Alt+Right"));
    action->setStatusTip(tr("Scroll the current pane to the right without moving the playback cursor or other panes"));
    connect(action, SIGNAL(triggered()), this, SLOT(peekRight()));
    connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    menu->addSeparator();

    m_keyReference->setCategory(tr("Zoom"));

    m_zoomInAction = new QAction(il.load("zoom-in"),
                                 tr("Zoom &In"), this);
    m_zoomInAction->setShortcut(tr("Up"));
    m_zoomInAction->setStatusTip(tr("Increase the zoom level"));
    connect(m_zoomInAction, SIGNAL(triggered()), this, SLOT(zoomIn()));
    connect(this, SIGNAL(canZoom(bool)), m_zoomInAction, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(m_zoomInAction);
    menu->addAction(m_zoomInAction);
        
    m_zoomOutAction = new QAction(il.load("zoom-out"),
                                  tr("Zoom &Out"), this);
    m_zoomOutAction->setShortcut(tr("Down"));
    m_zoomOutAction->setStatusTip(tr("Decrease the zoom level"));
    connect(m_zoomOutAction, SIGNAL(triggered()), this, SLOT(zoomOut()));
    connect(this, SIGNAL(canZoom(bool)), m_zoomOutAction, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(m_zoomOutAction);
    menu->addAction(m_zoomOutAction);
        
    action = new QAction(tr("Restore &Default Zoom"), this);
    action->setStatusTip(tr("Restore the zoom level to the default"));
    connect(action, SIGNAL(triggered()), this, SLOT(zoomDefault()));
    connect(this, SIGNAL(canZoom(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

    m_zoomFitAction = new QAction(il.load("zoom-fit"),
                                  tr("Zoom to &Fit"), this);
    m_zoomFitAction->setShortcut(tr("F"));
    m_zoomFitAction->setStatusTip(tr("Zoom to show the whole file"));
    connect(m_zoomFitAction, SIGNAL(triggered()), this, SLOT(zoomToFit()));
    connect(this, SIGNAL(canZoom(bool)), m_zoomFitAction, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(m_zoomFitAction);
    menu->addAction(m_zoomFitAction);

    menu->addSeparator();

    m_keyReference->setCategory(tr("Display Features"));

    action = new QAction(tr("Show &Centre Line"), this);
    action->setShortcut(tr("'"));
    action->setStatusTip(tr("Show or hide the centre line"));
    connect(action, SIGNAL(triggered()), this, SLOT(toggleCentreLine()));
    action->setCheckable(true);
    action->setChecked(m_viewManager->shouldShowCentreLine());
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    action = new QAction(tr("Toggle All Time Rulers"), this);
    action->setShortcut(tr("#"));
    action->setStatusTip(tr("Show or hide all time rulers"));
    connect(action, SIGNAL(triggered()), this, SLOT(toggleTimeRulers()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    menu->addSeparator();

    QActionGroup *overlayGroup = new QActionGroup(this);
        
    ViewManager::OverlayMode mode = m_viewManager->getOverlayMode();

    action = new QAction(tr("Show &No Overlays"), this);
    action->setShortcut(tr("0"));
    action->setStatusTip(tr("Hide times, layer names, and scale"));
    connect(action, SIGNAL(triggered()), this, SLOT(showNoOverlays()));
    action->setCheckable(true);
    action->setChecked(mode == ViewManager::NoOverlays);
    overlayGroup->addAction(action);
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
        
    action = new QAction(tr("Show &Minimal Overlays"), this);
    action->setShortcut(tr("9"));
    action->setStatusTip(tr("Show times and basic scale"));
    connect(action, SIGNAL(triggered()), this, SLOT(showMinimalOverlays()));
    action->setCheckable(true);
    action->setChecked(mode == ViewManager::StandardOverlays);
    overlayGroup->addAction(action);
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
        
    action = new QAction(tr("Show &All Overlays"), this);
    action->setShortcut(tr("8"));
    action->setStatusTip(tr("Show times, layer names, and scale"));
    connect(action, SIGNAL(triggered()), this, SLOT(showAllOverlays()));
    action->setCheckable(true);
    action->setChecked(mode == ViewManager::AllOverlays);
    overlayGroup->addAction(action);
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    menu->addSeparator();
        
    action = new QAction(tr("Show &Zoom Wheels"), this);
    action->setShortcut(tr("Z"));
    action->setStatusTip(tr("Show thumbwheels for zooming horizontally and vertically"));
    connect(action, SIGNAL(triggered()), this, SLOT(toggleZoomWheels()));
    action->setCheckable(true);
    action->setChecked(m_viewManager->getZoomWheelsEnabled());
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    m_showPropertyBoxesAction = new QAction(tr("Show Property Bo&xes"), this);
    m_showPropertyBoxesAction->setShortcut(tr("X"));
    m_showPropertyBoxesAction->setStatusTip(tr("Show the layer property boxes at the side of the main window"));
    connect(m_showPropertyBoxesAction, SIGNAL(triggered()), this, SLOT(togglePropertyBoxes()));
    m_showPropertyBoxesAction->setCheckable(true);
    m_showPropertyBoxesAction->setChecked(true);
    m_keyReference->registerShortcut(m_showPropertyBoxesAction);
    menu->addAction(m_showPropertyBoxesAction);

    action = new QAction(tr("Show Status &Bar"), this);
    action->setStatusTip(tr("Show context help information in the status bar at the bottom of the window"));
    connect(action, SIGNAL(triggered()), this, SLOT(toggleStatusBar()));
    action->setCheckable(true);
    action->setChecked(true);
    menu->addAction(action);

    QSettings settings;
    settings.beginGroup("MainWindow");
    bool sb = settings.value("showstatusbar", true).toBool();
    if (!sb) {
        action->setChecked(false);
        statusBar()->hide();
    }
    settings.endGroup();

    menu->addSeparator();

    action = new QAction(tr("Show La&yer Summary"), this);
    action->setShortcut(tr("Y"));
    action->setStatusTip(tr("Open a window displaying the hierarchy of panes and layers in this session"));
    connect(action, SIGNAL(triggered()), this, SLOT(showLayerTree()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    action = new QAction(tr("Show Acti&vity Log"), this);
    action->setStatusTip(tr("Open a window listing interactions and other events"));
    connect(action, SIGNAL(triggered()), this, SLOT(showActivityLog()));
    menu->addAction(action);

    action = new QAction(tr("Show &Unit Converter"), this);
    action->setStatusTip(tr("Open a window of pitch and timing conversion utilities"));
    connect(action, SIGNAL(triggered()), this, SLOT(showUnitConverter()));
    menu->addAction(action);

    menu->addSeparator();

#ifndef Q_OS_MAC
    // Only on non-Mac platforms -- on the Mac this interacts very
    // badly with the "native" full-screen mode
    action = new QAction(tr("Go Full-Screen"), this);
    action->setShortcut(tr("F11"));
    action->setStatusTip(tr("Expand the pane area to the whole screen"));
    connect(action, SIGNAL(triggered()), this, SLOT(goFullScreen()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
#endif
}

QString
MainWindow::shortcutFor(LayerFactory::LayerType layer, bool isPaneMenu)
{
    QString shortcutText;
    
#ifdef __GNUC__
#pragma GCC diagnostic ignored "-Wswitch-enum"
#endif
    
    switch (layer) {
    case LayerFactory::Waveform:
        if (isPaneMenu) {
            shortcutText = tr("W");
        } else {
            shortcutText = tr("Shift+W");
        }
        break;
                
    case LayerFactory::Spectrogram:
        if (isPaneMenu) {
            shortcutText = tr("G");
        } else {
            shortcutText = tr("Shift+G");
        }
        break;
                
    case LayerFactory::MelodicRangeSpectrogram:
        if (isPaneMenu) {
            shortcutText = tr("M");
        } else {
            shortcutText = tr("Shift+M");
        }
        break;
                
    case LayerFactory::PeakFrequencySpectrogram:
        if (isPaneMenu) {
            shortcutText = tr("K");
        } else {
            shortcutText = tr("Shift+K");
        }
        break;
                
    case LayerFactory::Spectrum:
        if (isPaneMenu) {
            shortcutText = tr("U");
        } else {
            shortcutText = tr("Shift+U");
        }
        break;

    default:
        break;
    }

    return shortcutText;
}

void
MainWindow::setupPaneAndLayerMenus()
{
    if (m_paneMenu) {
        m_paneActions.clear();
        m_paneMenu->clear();
    } else {
        m_paneMenu = menuBar()->addMenu(tr("&Pane"));
        m_paneMenu->setTearOffEnabled(true);
    }

    if (m_layerMenu) {
        m_layerActions.clear();
        m_layerMenu->clear();
    } else {
        m_layerMenu = menuBar()->addMenu(tr("&Layer"));
        m_layerMenu->setTearOffEnabled(true);
    }

    if (m_rightButtonLayerMenu) {
        m_rightButtonLayerMenu->clear();
    } else {
        m_rightButtonLayerMenu = m_rightButtonMenu->addMenu(tr("&Layer"));
        m_rightButtonLayerMenu->setTearOffEnabled(true);
        m_rightButtonMenu->addSeparator();
    }

    QMenu *menu = m_paneMenu;

    IconLoader il;

    m_keyReference->setCategory(tr("Managing Panes and Layers"));

    QAction *action = new QAction(il.load("pane"), tr("Add &New Pane"), this);
    action->setShortcut(tr("N"));
    action->setStatusTip(tr("Add a new pane containing only a time ruler"));
    connect(action, SIGNAL(triggered()), this, SLOT(addPane()));
    connect(this, SIGNAL(canAddPane(bool)), action, SLOT(setEnabled(bool)));
    m_paneActions[action] = LayerConfiguration(LayerFactory::TimeRuler);
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    menu->addSeparator();

    menu = m_layerMenu;

    LayerFactory::LayerTypeSet emptyLayerTypes =
        LayerFactory::getInstance()->getValidEmptyLayerTypes();

    for (LayerFactory::LayerTypeSet::iterator i = emptyLayerTypes.begin();
         i != emptyLayerTypes.end(); ++i) {
        
        QIcon icon;
        QString mainText, tipText, channelText;
        LayerFactory::LayerType type = *i;
        QString name = LayerFactory::getInstance()->getLayerPresentationName(type);
        
        icon = il.load(LayerFactory::getInstance()->getLayerIconName(type));

        mainText = tr("Add New %1 Layer").arg(name);
        tipText = tr("Add a new empty layer of type %1").arg(name);

        action = new QAction(icon, mainText, this);
        action->setStatusTip(tipText);

        if (type == LayerFactory::Text) {
            action->setShortcut(tr("T"));
            m_keyReference->registerShortcut(action);
        }

        connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
        connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
        m_layerActions[action] = LayerConfiguration(type);
        menu->addAction(action);
        m_rightButtonLayerMenu->addAction(action);
    }
    
    m_rightButtonLayerMenu->addSeparator();
    menu->addSeparator();

    LayerFactory::LayerType backgroundTypes[] = {
        LayerFactory::Waveform,
        LayerFactory::Spectrogram,
        LayerFactory::MelodicRangeSpectrogram,
        LayerFactory::PeakFrequencySpectrogram,
        LayerFactory::Spectrum
    };
    int backgroundTypeCount = int(sizeof(backgroundTypes) /
                                  sizeof(backgroundTypes[0]));

    std::vector<Model *> models;
    if (m_document) models = m_document->getTransformInputModels();
    bool plural = (models.size() > 1);
    if (models.empty()) {
        models.push_back(getMainModel()); // probably 0
    }

    for (int i = 0; i < backgroundTypeCount; ++i) {

        const int paneMenuType = 0, layerMenuType = 1;

        for (int menuType = paneMenuType; menuType <= layerMenuType; ++menuType) {

            if (menuType == paneMenuType) menu = m_paneMenu;
            else menu = m_layerMenu;

            QMenu *submenu = 0;

            QIcon icon;
            QString mainText, tipText, channelText;
            LayerFactory::LayerType type = backgroundTypes[i];
            bool mono = true;

            QString shortcutText = shortcutFor(type, menuType == paneMenuType);

// Avoid warnings/errors with -Wextra because we aren't explicitly
// handling all layer types (-Wall is OK with this because of the
// default but the stricter level insists)
#ifdef __GNUC__
#pragma GCC diagnostic ignored "-Wswitch-enum"
#endif
            
            switch (type) {
                    
            case LayerFactory::Waveform:
                icon = il.load("waveform");
                mainText = tr("Add &Waveform");
                if (menuType == paneMenuType) {
                    tipText = tr("Add a new pane showing a waveform view");
                } else {
                    tipText = tr("Add a new layer showing a waveform view");
                }
                mono = false;
                break;
                
            case LayerFactory::Spectrogram:
                icon = il.load("spectrogram");
                mainText = tr("Add Spectro&gram");
                if (menuType == paneMenuType) {
                    tipText = tr("Add a new pane showing a spectrogram");
                } else {
                    tipText = tr("Add a new layer showing a spectrogram");
                }
                break;
                
            case LayerFactory::MelodicRangeSpectrogram:
                icon = il.load("spectrogram");
                mainText = tr("Add &Melodic Range Spectrogram");
                if (menuType == paneMenuType) {
                    tipText = tr("Add a new pane showing a spectrogram set up for an overview of note pitches");
                } else {
                    tipText = tr("Add a new layer showing a spectrogram set up for an overview of note pitches");
                }
                break;
                
            case LayerFactory::PeakFrequencySpectrogram:
                icon = il.load("spectrogram");
                mainText = tr("Add Pea&k Frequency Spectrogram");
                if (menuType == paneMenuType) {
                    tipText = tr("Add a new pane showing a spectrogram set up for tracking frequencies");
                } else {
                    tipText = tr("Add a new layer showing a spectrogram set up for tracking frequencies");
                }
                break;
                
            case LayerFactory::Spectrum:
                icon = il.load("spectrum");
                mainText = tr("Add Spectr&um");
                if (menuType == paneMenuType) {
                    tipText = tr("Add a new pane showing a frequency spectrum");
                } else {
                    tipText = tr("Add a new layer showing a frequency spectrum");
                }
                break;
                
            default: break;
            }

            std::vector<Model *> candidateModels = models;
            
            for (std::vector<Model *>::iterator mi =
                     candidateModels.begin();
                 mi != candidateModels.end(); ++mi) {
                
                Model *model = *mi;

                int channels = 0;
                if (model) {
                    DenseTimeValueModel *dtvm =
                        dynamic_cast<DenseTimeValueModel *>(model);
                    if (dtvm) channels = dtvm->getChannelCount();
                }
                if (channels < 1 && getMainModel()) {
                    channels = getMainModel()->getChannelCount();
                }
                if (channels < 1) channels = 1;

                for (int c = 0; c <= channels; ++c) {

                    if (c == 1 && channels == 1) continue;
                    bool isDefault = (c == 0);
                    bool isOnly = (isDefault && (channels == 1));

                    if (isOnly && !plural) {

                        action = new QAction(icon, mainText, this);

                        action->setShortcut(shortcutText);
                        action->setStatusTip(tipText);
                        if (menuType == paneMenuType) {
                            connect(action, SIGNAL(triggered()),
                                    this, SLOT(addPane()));
                            connect(this, SIGNAL(canAddPane(bool)),
                                    action, SLOT(setEnabled(bool)));
                            m_paneActions[action] =
                                LayerConfiguration(type, model);
                        } else {
                            connect(action, SIGNAL(triggered()),
                                    this, SLOT(addLayer()));
                            connect(this, SIGNAL(canAddLayer(bool)),
                                    action, SLOT(setEnabled(bool)));
                            m_layerActions[action] =
                                LayerConfiguration(type, model);
                        }
                        if (shortcutText != "") {
                            m_keyReference->registerShortcut(action);
                        }
                        menu->addAction(action);
                        
                    } else {
                        
                        if (!submenu) {
                            submenu = menu->addMenu(mainText);
                            submenu->setTearOffEnabled(true);
                        } else if (isDefault) {
                            submenu->addSeparator();
                        }

                        QString actionText;
                        if (c == 0) {
                            if (mono) {
                                actionText = tr("&All Channels Mixed");
                            } else {
                                actionText = tr("&All Channels");
                            }
                        } else {
                            actionText = tr("Channel &%1").arg(c);
                        }

                        if (model) {
                            actionText = tr("%1: %2")
                                .arg(model->objectName())
                                .arg(actionText);
                        }

                        if (isDefault) {
                            action = new QAction(icon, actionText, this);
                            if (!model || model == getMainModel()) {
                                action->setShortcut(shortcutText); 
                            }
                        } else {
                            action = new QAction(actionText, this);
                        }

                        action->setStatusTip(tipText);

                        if (menuType == paneMenuType) {
                            connect(action, SIGNAL(triggered()),
                                    this, SLOT(addPane()));
                            connect(this, SIGNAL(canAddPane(bool)),
                                    action, SLOT(setEnabled(bool)));
                            m_paneActions[action] =
                                LayerConfiguration(type, model, c - 1);
                        } else {
                            connect(action, SIGNAL(triggered()),
                                    this, SLOT(addLayer()));
                            connect(this, SIGNAL(canAddLayer(bool)),
                                    action, SLOT(setEnabled(bool)));
                            m_layerActions[action] =
                                LayerConfiguration(type, model, c - 1);
                        }

                        submenu->addAction(action);
                    }

                    if (isDefault && menuType == layerMenuType &&
                        mi == candidateModels.begin()) {
                        // only add for one model, one channel, one menu on
                        // right button -- the action itself will discover
                        // which model is the correct one (based on pane)
                        action = new QAction(icon, mainText, this);
                        action->setStatusTip(tipText);
                        connect(action, SIGNAL(triggered()),
                                this, SLOT(addLayer()));
                        connect(this, SIGNAL(canAddLayer(bool)),
                                action, SLOT(setEnabled(bool)));
                        m_layerActions[action] = LayerConfiguration(type, 0, 0);
                        m_rightButtonLayerMenu->addAction(action);
                    }
                }
            }
        }
    }

    m_rightButtonLayerMenu->addSeparator();

    menu = m_paneMenu;
    menu->addSeparator();

    action = new QAction(tr("Switch to Previous Pane"), this);
    action->setShortcut(tr("["));
    action->setStatusTip(tr("Make the next pane up in the pane stack current"));
    connect(action, SIGNAL(triggered()), this, SLOT(previousPane()));
    connect(this, SIGNAL(canSelectPreviousPane(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    action = new QAction(tr("Switch to Next Pane"), this);
    action->setShortcut(tr("]"));
    action->setStatusTip(tr("Make the next pane down in the pane stack current"));
    connect(action, SIGNAL(triggered()), this, SLOT(nextPane()));
    connect(this, SIGNAL(canSelectNextPane(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    menu->addSeparator();

    action = new QAction(il.load("editdelete"), tr("&Delete Pane"), this);
    action->setShortcut(tr("Ctrl+Shift+D"));
    action->setStatusTip(tr("Delete the currently active pane"));
    connect(action, SIGNAL(triggered()), this, SLOT(deleteCurrentPane()));
    connect(this, SIGNAL(canDeleteCurrentPane(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    menu = m_layerMenu;

    action = new QAction(il.load("timeruler"), tr("Add &Time Ruler"), this);
    action->setStatusTip(tr("Add a new layer showing a time ruler"));
    connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
    connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
    m_layerActions[action] = LayerConfiguration(LayerFactory::TimeRuler);
    menu->addAction(action);

    menu->addSeparator();

    m_existingLayersMenu = menu->addMenu(tr("Add &Existing Layer"));
    m_existingLayersMenu->setTearOffEnabled(true);
    m_rightButtonLayerMenu->addMenu(m_existingLayersMenu);

    m_sliceMenu = menu->addMenu(tr("Add S&lice of Layer"));
    m_sliceMenu->setTearOffEnabled(true);
    m_rightButtonLayerMenu->addMenu(m_sliceMenu);

    setupExistingLayersMenus();

    menu->addSeparator();

    action = new QAction(tr("Switch to Previous Layer"), this);
    action->setShortcut(tr("{"));
    action->setStatusTip(tr("Make the previous layer in the pane current"));
    connect(action, SIGNAL(triggered()), this, SLOT(previousLayer()));
    connect(this, SIGNAL(canSelectPreviousLayer(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    action = new QAction(tr("Switch to Next Layer"), this);
    action->setShortcut(tr("}"));
    action->setStatusTip(tr("Make the next layer in the pane current"));
    connect(action, SIGNAL(triggered()), this, SLOT(nextLayer()));
    connect(this, SIGNAL(canSelectNextLayer(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    m_rightButtonLayerMenu->addSeparator();
    menu->addSeparator();

    QAction *raction = new QAction(tr("&Rename Layer..."), this);
    raction->setShortcut(tr("R"));
    raction->setStatusTip(tr("Rename the currently active layer"));
    connect(raction, SIGNAL(triggered()), this, SLOT(renameCurrentLayer()));
    connect(this, SIGNAL(canRenameLayer(bool)), raction, SLOT(setEnabled(bool)));
    menu->addAction(raction);
    m_rightButtonLayerMenu->addAction(raction);

    QAction *eaction = new QAction(tr("Edit Layer Data"), this);
    eaction->setShortcut(tr("E"));
    eaction->setStatusTip(tr("Edit the currently active layer as a data grid"));
    connect(eaction, SIGNAL(triggered()), this, SLOT(editCurrentLayer()));
    connect(this, SIGNAL(canEditLayerTabular(bool)), eaction, SLOT(setEnabled(bool)));
    menu->addAction(eaction);
    m_rightButtonLayerMenu->addAction(eaction);

    action = new QAction(il.load("editdelete"), tr("&Delete Layer"), this);
    action->setShortcut(tr("Ctrl+D"));
    action->setStatusTip(tr("Delete the currently active layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(deleteCurrentLayer()));
    connect(this, SIGNAL(canDeleteCurrentLayer(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    m_rightButtonLayerMenu->addAction(action);

    m_keyReference->registerShortcut(raction); // rename after delete, so delete layer goes next to delete pane
    m_keyReference->registerShortcut(eaction); // edit also after delete

    finaliseMenus();
}

void
MainWindow::updateLayerShortcutsFor(Model *model)
{
    set<LayerFactory::LayerType> seen;
    
    for (auto &a : m_paneActions) {
        if (!a.second.sourceModel) continue; // empty pane/layer shortcut
        auto type = a.second.layer;
        if (a.second.sourceModel == model && seen.find(type) == seen.end()) {
            a.first->setShortcut(shortcutFor(type, true));
            seen.insert(type);
        } else {
            a.first->setShortcut(QString());
        }
    }

    seen.clear();
    
    for (auto &a : m_layerActions) {
        if (!a.second.sourceModel) continue; // empty pane/layer shortcut
        auto type = a.second.layer;
        if (a.second.sourceModel == model && seen.find(type) == seen.end()) {
            a.first->setShortcut(shortcutFor(type, false));
            seen.insert(type);
        } else {
            a.first->setShortcut(QString());
        }
    }
}

void
MainWindow::setupTransformsMenu()
{
    if (m_transformsMenu) {
        m_transformActions.clear();
        m_transformActionsReverse.clear();
        m_transformsMenu->clear();
    } else {
        m_transformsMenu = menuBar()->addMenu(tr("&Transform")); 
        m_transformsMenu->setTearOffEnabled(true);
        m_transformsMenu->setSeparatorsCollapsible(true);
    }

    TransformFactory *factory = TransformFactory::getInstance();

    TransformList transforms = factory->getAllTransformDescriptions();

    if (factory->getStartupFailureReport() != "") {
        pluginPopulationWarning();
    }
    
    vector<TransformDescription::Type> types = factory->getAllTransformTypes();

    map<TransformDescription::Type, map<QString, SubdividingMenu *> > categoryMenus;
    map<TransformDescription::Type, map<QString, SubdividingMenu *> > makerMenus;

    map<TransformDescription::Type, SubdividingMenu *> byPluginNameMenus;
    map<TransformDescription::Type, map<QString, QMenu *> > pluginNameMenus;

    set<SubdividingMenu *> pendingMenus;

    m_recentTransformsMenu = m_transformsMenu->addMenu(tr("&Recent Transforms"));
    m_recentTransformsMenu->setTearOffEnabled(true);
    m_rightButtonTransformsMenu->addMenu(m_recentTransformsMenu);
    connect(&m_recentTransforms, SIGNAL(recentChanged()),
            this, SLOT(setupRecentTransformsMenu()));

    m_transformsMenu->addSeparator();
    m_rightButtonTransformsMenu->addSeparator();
    
    for (vector<TransformDescription::Type>::iterator i = types.begin();
         i != types.end(); ++i) {

        if (i != types.begin()) {
            m_transformsMenu->addSeparator();
            m_rightButtonTransformsMenu->addSeparator();
        }

        QString byCategoryLabel = tr("%1 by Category")
            .arg(factory->getTransformTypeName(*i));
        SubdividingMenu *byCategoryMenu = new SubdividingMenu(byCategoryLabel,
                                                              20, 40);
        byCategoryMenu->setTearOffEnabled(true);
        m_transformsMenu->addMenu(byCategoryMenu);
        m_rightButtonTransformsMenu->addMenu(byCategoryMenu);
        pendingMenus.insert(byCategoryMenu);

        vector<QString> categories = factory->getTransformCategories(*i);

        for (vector<QString>::iterator j = categories.begin();
             j != categories.end(); ++j) {

            QString category = *j;
            if (category == "") category = tr("Unclassified");

            if (categories.size() < 2) {
                categoryMenus[*i][category] = byCategoryMenu;
                continue;
            }

            QStringList components = category.split(" > ");
            QString key;

            for (QStringList::iterator k = components.begin();
                 k != components.end(); ++k) {

                QString parentKey = key;
                if (key != "") key += " > ";
                key += *k;

                if (categoryMenus[*i].find(key) == categoryMenus[*i].end()) {
                    SubdividingMenu *m = new SubdividingMenu(*k, 20, 40);
                    m->setTearOffEnabled(true);
                    pendingMenus.insert(m);
                    categoryMenus[*i][key] = m;
                    if (parentKey == "") {
                        byCategoryMenu->addMenu(m);
                    } else {
                        categoryMenus[*i][parentKey]->addMenu(m);
                    }
                }
            }
        }

        QString byPluginNameLabel = tr("%1 by Plugin Name")
            .arg(factory->getTransformTypeName(*i));
        byPluginNameMenus[*i] = new SubdividingMenu(byPluginNameLabel);
        byPluginNameMenus[*i]->setTearOffEnabled(true);
        m_transformsMenu->addMenu(byPluginNameMenus[*i]);
        m_rightButtonTransformsMenu->addMenu(byPluginNameMenus[*i]);
        pendingMenus.insert(byPluginNameMenus[*i]);

        QString byMakerLabel = tr("%1 by Maker")
            .arg(factory->getTransformTypeName(*i));
        SubdividingMenu *byMakerMenu = new SubdividingMenu(byMakerLabel, 20, 40);
        byMakerMenu->setTearOffEnabled(true);
        m_transformsMenu->addMenu(byMakerMenu);
        m_rightButtonTransformsMenu->addMenu(byMakerMenu);
        pendingMenus.insert(byMakerMenu);

        vector<QString> makers = factory->getTransformMakers(*i);

        for (vector<QString>::iterator j = makers.begin();
             j != makers.end(); ++j) {

            QString maker = *j;
            if (maker == "") maker = tr("Unknown");
            maker.replace(QRegExp(tr(" [\\(<].*$")), "");

            makerMenus[*i][maker] = new SubdividingMenu(maker, 30, 40);
            makerMenus[*i][maker]->setTearOffEnabled(true);
            byMakerMenu->addMenu(makerMenus[*i][maker]);
            pendingMenus.insert(makerMenus[*i][maker]);
        }
    }

    // Names should only be duplicated here if they have the same
    // plugin name, output name and maker but are in different library
    // .so names -- that won't happen often I hope
    std::map<QString, QString> idNameSonameMap;
    std::set<QString> seenNames, duplicateNames;
    for (int i = 0; in_range_for(transforms, i); ++i) {
        QString name = transforms[i].name;
        if (seenNames.find(name) != seenNames.end()) {
            duplicateNames.insert(name);
        } else {
            seenNames.insert(name);
        }
    }

    for (int i = 0; in_range_for(transforms, i); ++i) {
        
        QString name = transforms[i].name;
        if (name == "") name = transforms[i].identifier;

//        cerr << "Plugin Name: " << name << endl;

        TransformDescription::Type type = transforms[i].type;
        QString typeStr = factory->getTransformTypeName(type);

        QString category = transforms[i].category;
        if (category == "") category = tr("Unclassified");

        QString maker = transforms[i].maker;
        if (maker == "") maker = tr("Unknown");
        maker.replace(QRegExp(tr(" [\\(<].*$")), "");

        QString pluginName = name.section(": ", 0, 0);
        QString output = name.section(": ", 1);

        if (duplicateNames.find(pluginName) != duplicateNames.end()) {
            pluginName = QString("%1 <%2>")
                .arg(pluginName)
                .arg(transforms[i].identifier.section(':', 1, 1));
            if (output == "") name = pluginName;
            else name = QString("%1: %2")
                .arg(pluginName)
                .arg(output);
        }

        QAction *action = new QAction(tr("%1...").arg(name), this);
        connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
        m_transformActions[action] = transforms[i].identifier;
        m_transformActionsReverse[transforms[i].identifier] = action;
        connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));

        action->setStatusTip(transforms[i].longDescription);

        if (categoryMenus[type].find(category) == categoryMenus[type].end()) {
            cerr << "WARNING: MainWindow::setupMenus: Internal error: "
                      << "No category menu for transform \""
                      << name << "\" (category = \""
                      << category << "\")" << endl;
        } else {
            categoryMenus[type][category]->addAction(action);
        }

        if (makerMenus[type].find(maker) == makerMenus[type].end()) {
            cerr << "WARNING: MainWindow::setupMenus: Internal error: "
                      << "No maker menu for transform \""
                      << name << "\" (maker = \""
                      << maker << "\")" << endl;
        } else {
            makerMenus[type][maker]->addAction(action);
        }

        action = new QAction(tr("%1...").arg(output == "" ? pluginName : output), this);
        connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
        m_transformActions[action] = transforms[i].identifier;
        connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
        action->setStatusTip(transforms[i].longDescription);

//        cerr << "Transform: \"" << name << "\": plugin name \"" << pluginName << "\"" << endl;

        if (pluginNameMenus[type].find(pluginName) ==
            pluginNameMenus[type].end()) {

            SubdividingMenu *parentMenu = byPluginNameMenus[type];
            parentMenu->setTearOffEnabled(true);

            if (output == "") {
                parentMenu->addAction(pluginName, action);
            } else {
                pluginNameMenus[type][pluginName] = 
                    parentMenu->addMenu(pluginName);
                connect(this, SIGNAL(canAddLayer(bool)),
                        pluginNameMenus[type][pluginName],
                        SLOT(setEnabled(bool)));
            }
        }

        if (pluginNameMenus[type].find(pluginName) !=
            pluginNameMenus[type].end()) {
            pluginNameMenus[type][pluginName]->addAction(action);
        }
    }

    for (set<SubdividingMenu *>::iterator i = pendingMenus.begin();
         i != pendingMenus.end(); ++i) {
        (*i)->entriesAdded();
    }

    m_transformsMenu->addSeparator();
    m_rightButtonTransformsMenu->addSeparator();

    QAction *action = new QAction(tr("Find a Transform..."), this);
    action->setStatusTip(tr("Search for a transform from the installed plugins, by name or description"));
    action->setShortcut(tr("Ctrl+M"));
    connect(action, SIGNAL(triggered()), this, SLOT(findTransform()));
//    connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    m_transformsMenu->addAction(action);
    m_rightButtonTransformsMenu->addAction(action);

    setupRecentTransformsMenu();
}

void
MainWindow::setupHelpMenu()
{
    QMenu *menu = menuBar()->addMenu(tr("&Help"));
    menu->setTearOffEnabled(true);
    
    m_keyReference->setCategory(tr("Help"));

    IconLoader il;

    QString name = QApplication::applicationName();

    QAction *action = new QAction(il.load("help"),
                                  tr("&Help Reference"), this); 
    action->setShortcut(tr("F1"));
    action->setStatusTip(tr("Open the %1 reference manual").arg(name)); 
    connect(action, SIGNAL(triggered()), this, SLOT(help()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    action = new QAction(tr("&Key and Mouse Reference"), this);
    action->setShortcut(tr("F2"));
    action->setStatusTip(tr("Open a window showing the keystrokes you can use in %1").arg(name));
    connect(action, SIGNAL(triggered()), this, SLOT(keyReference()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    
    action = new QAction(tr("What's &New In This Release?"), this); 
    action->setStatusTip(tr("List the changes in this release (and every previous release) of %1").arg(name)); 
    connect(action, SIGNAL(triggered()), this, SLOT(whatsNew()));
    menu->addAction(action);
    
    action = new QAction(tr("&About %1").arg(name), this); 
    action->setStatusTip(tr("Show information about %1").arg(name)); 
    connect(action, SIGNAL(triggered()), this, SLOT(about()));
    menu->addAction(action);
}

void
MainWindow::setupRecentFilesMenu()
{
    m_recentFilesMenu->clear();
    vector<QString> files = m_recentFiles.getRecent();
    for (size_t i = 0; i < files.size(); ++i) {
        /* F. Nicol patch 13 Aug. 2016 */
        const QString& path = files[i];
        QAction *action = new QAction(path, this);
        connect(action, &QAction::triggered, [this, path] { openRecentFile(path);});
        /* end of patch */
        if (i == 0) {
            action->setShortcut(tr("Ctrl+R"));
            m_keyReference->registerShortcut
                (tr("Re-open"),
                 action->shortcut().toString(),
                 tr("Re-open the current or most recently opened file"));
        }
        m_recentFilesMenu->addAction(action);
    }
}

void
MainWindow::setupTemplatesMenu()
{
    m_templatesMenu->clear();

    QAction *defaultAction = new QAction(tr("Standard Waveform"), this);
    defaultAction->setObjectName("default");
    connect(defaultAction, SIGNAL(triggered()), this, SLOT(applyTemplate()));
    m_templatesMenu->addAction(defaultAction);

    m_templatesMenu->addSeparator();

    QAction *action = 0;

    QStringList templates = ResourceFinder().getResourceFiles("templates", "svt");

    bool havePersonal = false;

    // (ordered by name)
    std::set<QString> byName;
    foreach (QString t, templates) {
        if (!t.startsWith(":")) havePersonal = true;
        byName.insert(QFileInfo(t).baseName());
    }

    foreach (QString t, byName) {
        if (t.toLower() == "default") continue;
        action = new QAction(t, this);
        connect(action, SIGNAL(triggered()), this, SLOT(applyTemplate()));
        m_templatesMenu->addAction(action);
    }

    if (!templates.empty()) m_templatesMenu->addSeparator();

    if (!m_templateWatcher) {
        m_templateWatcher = new QFileSystemWatcher(this);
        m_templateWatcher->addPath(ResourceFinder().getResourceSaveDir("templates"));
        connect(m_templateWatcher, SIGNAL(directoryChanged(const QString &)),
                this, SLOT(setupTemplatesMenu()));
    }

    QAction *setDefaultAction = new QAction(tr("Choose Default Template..."), this);
    setDefaultAction->setObjectName("set_default_template");
    connect(setDefaultAction, SIGNAL(triggered()), this, SLOT(preferences()));
    m_templatesMenu->addSeparator();
    m_templatesMenu->addAction(setDefaultAction);

    m_manageTemplatesAction->setEnabled(havePersonal);
}


void
MainWindow::setupRecentTransformsMenu()
{
    m_recentTransformsMenu->clear();
    vector<QString> transforms = m_recentTransforms.getRecent();
    for (size_t i = 0; i < transforms.size(); ++i) {
        TransformActionReverseMap::iterator ti =
            m_transformActionsReverse.find(transforms[i]);
        if (ti == m_transformActionsReverse.end()) {
            cerr << "WARNING: MainWindow::setupRecentTransformsMenu: "
                      << "Unknown transform \"" << transforms[i]
                      << "\" in recent transforms list" << endl;
            continue;
        }
        if (i == 0) {
            ti->second->setShortcut(tr("Ctrl+T"));
            m_keyReference->registerShortcut
                (tr("Repeat Transform"),
                 ti->second->shortcut().toString(),
                 tr("Re-select the most recently run transform"));
        } else {
            ti->second->setShortcut(QString(""));
        }
        m_recentTransformsMenu->addAction(ti->second);
    }
}

void
MainWindow::setupExistingLayersMenus()
{
    if (!m_existingLayersMenu) return; // should have been created by setupMenus

//    SVDEBUG << "MainWindow::setupExistingLayersMenu" << endl;

    m_existingLayersMenu->clear();
    m_existingLayerActions.clear();

    m_sliceMenu->clear();
    m_sliceActions.clear();

    IconLoader il;

    vector<Layer *> orderedLayers;
    set<Layer *> observedLayers;
    set<Layer *> sliceableLayers;

    LayerFactory *factory = LayerFactory::getInstance();

    for (int i = 0; i < m_paneStack->getPaneCount(); ++i) {

        Pane *pane = m_paneStack->getPane(i);
        if (!pane) continue;

        for (int j = 0; j < pane->getLayerCount(); ++j) {

            Layer *layer = pane->getLayer(j);
            if (!layer) continue;
            if (observedLayers.find(layer) != observedLayers.end()) {
//                cerr << "found duplicate layer " << layer << endl;
                continue;
            }

//            cerr << "found new layer " << layer << " (name = " 
//                      << layer->getLayerPresentationName() << ")" << endl;

            orderedLayers.push_back(layer);
            observedLayers.insert(layer);

            if (factory->isLayerSliceable(layer)) {
                sliceableLayers.insert(layer);
            }
        }
    }

    map<QString, int> observedNames;

    for (size_t i = 0; i < orderedLayers.size(); ++i) {
        
        Layer *layer = orderedLayers[i];

        QString name = layer->getLayerPresentationName();
        int n = ++observedNames[name];
        if (n > 1) name = QString("%1 <%2>").arg(name).arg(n);

        QIcon icon = il.load(factory->getLayerIconName
                             (factory->getLayerType(layer)));

        QAction *action = new QAction(icon, name, this);
        connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
        connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
        m_existingLayerActions[action] = layer;

        m_existingLayersMenu->addAction(action);

        if (sliceableLayers.find(layer) != sliceableLayers.end()) {
            action = new QAction(icon, name, this);
            connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
            connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
            m_sliceActions[action] = layer;
            m_sliceMenu->addAction(action);
        }
    }

    m_sliceMenu->setEnabled(!m_sliceActions.empty());
}

void
MainWindow::setupToolbars()
{
    m_keyReference->setCategory(tr("Playback and Transport Controls"));

    IconLoader il;

    QMenu *menu = m_playbackMenu = menuBar()->addMenu(tr("Play&back"));
    menu->setTearOffEnabled(true);
    m_rightButtonMenu->addSeparator();
    m_rightButtonPlaybackMenu = m_rightButtonMenu->addMenu(tr("Playback"));

    QToolBar *toolbar = addToolBar(tr("Playback Toolbar"));

    m_rwdStartAction = toolbar->addAction(il.load("rewind-start"),
                                          tr("Rewind to Start"));
    m_rwdStartAction->setShortcut(tr("Home"));
    m_rwdStartAction->setStatusTip(tr("Rewind to the start"));
    connect(m_rwdStartAction, SIGNAL(triggered()), this, SLOT(rewindStart()));
    connect(this, SIGNAL(canPlay(bool)), m_rwdStartAction, SLOT(setEnabled(bool)));

    m_rwdAction = toolbar->addAction(il.load("rewind"), tr("Rewind"));
    m_rwdAction->setShortcut(tr("PgUp"));
    m_rwdAction->setStatusTip(tr("Rewind to the previous time instant or time ruler notch"));
    connect(m_rwdAction, SIGNAL(triggered()), this, SLOT(rewind()));
    connect(this, SIGNAL(canRewind(bool)), m_rwdAction, SLOT(setEnabled(bool)));

    m_rwdSimilarAction = new QAction(tr("Rewind to Similar Point"), this);
    m_rwdSimilarAction->setShortcut(tr("Shift+PgUp"));
    m_rwdSimilarAction->setStatusTip(tr("Rewind to the previous similarly valued time instant"));
    connect(m_rwdSimilarAction, SIGNAL(triggered()), this, SLOT(rewindSimilar()));
    connect(this, SIGNAL(canRewind(bool)), m_rwdSimilarAction, SLOT(setEnabled(bool)));

    m_playAction = toolbar->addAction(il.load("playpause"),
                                      tr("Play / Pause"));
    m_playAction->setCheckable(true);

    /*: This text is a shortcut label referring to the space-bar on
        the keyboard. It probably should not be translated, and
        certainly should not be translated as if referring to an empty
        void or to the extra-terrestrial universe.
     */
    m_playAction->setShortcut(tr("Space"));

    m_playAction->setStatusTip(tr("Start or stop playback from the current position"));
    connect(m_playAction, SIGNAL(triggered()), this, SLOT(play()));
    connect(m_playSource, SIGNAL(playStatusChanged(bool)),
            m_playAction, SLOT(setChecked(bool)));
    connect(m_playSource, SIGNAL(playStatusChanged(bool)),
            this, SLOT(playStatusChanged(bool)));
    connect(this, SIGNAL(canPlay(bool)), m_playAction, SLOT(setEnabled(bool)));

    m_ffwdAction = toolbar->addAction(il.load("ffwd"),
                                      tr("Fast Forward"));
    m_ffwdAction->setShortcut(tr("PgDown"));
    m_ffwdAction->setStatusTip(tr("Fast-forward to the next time instant or time ruler notch"));
    connect(m_ffwdAction, SIGNAL(triggered()), this, SLOT(ffwd()));
    connect(this, SIGNAL(canFfwd(bool)), m_ffwdAction, SLOT(setEnabled(bool)));

    m_ffwdSimilarAction = new QAction(tr("Fast Forward to Similar Point"), this);
    m_ffwdSimilarAction->setShortcut(tr("Shift+PgDown"));
    m_ffwdSimilarAction->setStatusTip(tr("Fast-forward to the next similarly valued time instant"));
    connect(m_ffwdSimilarAction, SIGNAL(triggered()), this, SLOT(ffwdSimilar()));
    connect(this, SIGNAL(canFfwd(bool)), m_ffwdSimilarAction, SLOT(setEnabled(bool)));

    m_ffwdEndAction = toolbar->addAction(il.load("ffwd-end"),
                                         tr("Fast Forward to End"));
    m_ffwdEndAction->setShortcut(tr("End"));
    m_ffwdEndAction->setStatusTip(tr("Fast-forward to the end"));
    connect(m_ffwdEndAction, SIGNAL(triggered()), this, SLOT(ffwdEnd()));
    connect(this, SIGNAL(canPlay(bool)), m_ffwdEndAction, SLOT(setEnabled(bool)));

    m_recordAction = toolbar->addAction(il.load("record"),
                                        tr("Record"));
    m_recordAction->setCheckable(true);
    m_recordAction->setShortcut(tr("Ctrl+Space"));
    m_recordAction->setStatusTip(tr("Record a new audio file"));
    connect(m_recordAction, SIGNAL(triggered()), this, SLOT(record()));
    connect(m_recordTarget, SIGNAL(recordStatusChanged(bool)),
            m_recordAction, SLOT(setChecked(bool)));
    connect(this, SIGNAL(canRecord(bool)),
            m_recordAction, SLOT(setEnabled(bool)));

    toolbar = addToolBar(tr("Play Mode Toolbar"));

    m_playSelectionAction = toolbar->addAction(il.load("playselection"),
                                               tr("Constrain Playback to Selection"));
    m_playSelectionAction->setCheckable(true);
    m_playSelectionAction->setChecked(m_viewManager->getPlaySelectionMode());
    m_playSelectionAction->setShortcut(tr("s"));
    m_playSelectionAction->setStatusTip(tr("Constrain playback to the selected regions"));
    connect(m_viewManager, SIGNAL(playSelectionModeChanged(bool)),
            m_playSelectionAction, SLOT(setChecked(bool)));
    connect(m_playSelectionAction, SIGNAL(triggered()), this, SLOT(playSelectionToggled()));
    connect(this, SIGNAL(canPlaySelection(bool)), m_playSelectionAction, SLOT(setEnabled(bool)));

    m_playLoopAction = toolbar->addAction(il.load("playloop"),
                                          tr("Loop Playback"));
    m_playLoopAction->setCheckable(true);
    m_playLoopAction->setChecked(m_viewManager->getPlayLoopMode());
    m_playLoopAction->setShortcut(tr("l"));
    m_playLoopAction->setStatusTip(tr("Loop playback"));
    connect(m_viewManager, SIGNAL(playLoopModeChanged(bool)),
            m_playLoopAction, SLOT(setChecked(bool)));
    connect(m_playLoopAction, SIGNAL(triggered()), this, SLOT(playLoopToggled()));
    connect(this, SIGNAL(canPlay(bool)), m_playLoopAction, SLOT(setEnabled(bool)));

    m_soloAction = toolbar->addAction(il.load("solo"),
                                      tr("Solo Current Pane"));
    m_soloAction->setCheckable(true);
    m_soloAction->setChecked(m_viewManager->getPlaySoloMode());
    m_prevSolo = m_viewManager->getPlaySoloMode();
    m_soloAction->setShortcut(tr("o"));
    m_soloAction->setStatusTip(tr("Solo the current pane during playback"));
    connect(m_viewManager, SIGNAL(playSoloModeChanged(bool)),
            m_soloAction, SLOT(setChecked(bool)));
    connect(m_soloAction, SIGNAL(triggered()), this, SLOT(playSoloToggled()));
    connect(this, SIGNAL(canChangeSolo(bool)), m_soloAction, SLOT(setEnabled(bool)));

    QAction *alAction = 0;
    if (Document::canAlign()) {
        alAction = toolbar->addAction(il.load("align"),
                                      tr("Align File Timelines"));
        alAction->setCheckable(true);
        alAction->setChecked(m_viewManager->getAlignMode());
        alAction->setStatusTip(tr("Treat multiple audio files as versions of the same work, and align their timelines"));
        connect(m_viewManager, SIGNAL(alignModeChanged(bool)),
                alAction, SLOT(setChecked(bool)));
        connect(alAction, SIGNAL(triggered()), this, SLOT(alignToggled()));
        connect(this, SIGNAL(canAlign(bool)), alAction, SLOT(setEnabled(bool)));
    }

    m_keyReference->registerShortcut(m_playAction);
    m_keyReference->registerShortcut(m_recordAction);
    m_keyReference->registerShortcut(m_playSelectionAction);
    m_keyReference->registerShortcut(m_playLoopAction);
    m_keyReference->registerShortcut(m_soloAction);
    if (alAction) m_keyReference->registerShortcut(alAction);
    m_keyReference->registerShortcut(m_rwdAction);
    m_keyReference->registerShortcut(m_ffwdAction);
    m_keyReference->registerShortcut(m_rwdSimilarAction);
    m_keyReference->registerShortcut(m_ffwdSimilarAction);
    m_keyReference->registerShortcut(m_rwdStartAction);
    m_keyReference->registerShortcut(m_ffwdEndAction);

    menu->addAction(m_playAction);
    menu->addAction(m_recordAction);
    menu->addAction(m_playSelectionAction);
    menu->addAction(m_playLoopAction);
    menu->addAction(m_soloAction);
    if (alAction) menu->addAction(alAction);
    menu->addSeparator();
    menu->addAction(m_rwdAction);
    menu->addAction(m_ffwdAction);
    menu->addSeparator();
    menu->addAction(m_rwdSimilarAction);
    menu->addAction(m_ffwdSimilarAction);
    menu->addSeparator();
    menu->addAction(m_rwdStartAction);
    menu->addAction(m_ffwdEndAction);
    menu->addSeparator();
    menu->addAction(m_recordAction);
    menu->addSeparator();

    m_rightButtonPlaybackMenu->addAction(m_playAction);
    m_rightButtonPlaybackMenu->addAction(m_playSelectionAction);
    m_rightButtonPlaybackMenu->addAction(m_playLoopAction);
    m_rightButtonPlaybackMenu->addAction(m_soloAction);
    if (alAction) m_rightButtonPlaybackMenu->addAction(alAction);
    m_rightButtonPlaybackMenu->addSeparator();
    m_rightButtonPlaybackMenu->addAction(m_rwdAction);
    m_rightButtonPlaybackMenu->addAction(m_ffwdAction);
    m_rightButtonPlaybackMenu->addSeparator();
    m_rightButtonPlaybackMenu->addAction(m_rwdStartAction);
    m_rightButtonPlaybackMenu->addAction(m_ffwdEndAction);
    m_rightButtonPlaybackMenu->addSeparator();
    m_rightButtonPlaybackMenu->addAction(m_recordAction);
    m_rightButtonPlaybackMenu->addSeparator();

    QAction *fastAction = menu->addAction(tr("Speed Up"));
    fastAction->setShortcut(tr("Ctrl+PgUp"));
    fastAction->setStatusTip(tr("Time-stretch playback to speed it up without changing pitch"));
    connect(fastAction, SIGNAL(triggered()), this, SLOT(speedUpPlayback()));
    connect(this, SIGNAL(canSpeedUpPlayback(bool)), fastAction, SLOT(setEnabled(bool)));
    
    QAction *slowAction = menu->addAction(tr("Slow Down"));
    slowAction->setShortcut(tr("Ctrl+PgDown"));
    slowAction->setStatusTip(tr("Time-stretch playback to slow it down without changing pitch"));
    connect(slowAction, SIGNAL(triggered()), this, SLOT(slowDownPlayback()));
    connect(this, SIGNAL(canSlowDownPlayback(bool)), slowAction, SLOT(setEnabled(bool)));

    QAction *normalAction = menu->addAction(tr("Restore Normal Speed"));
    normalAction->setShortcut(tr("Ctrl+Home"));
    normalAction->setStatusTip(tr("Restore non-time-stretched playback"));
    connect(normalAction, SIGNAL(triggered()), this, SLOT(restoreNormalPlayback()));
    connect(this, SIGNAL(canChangePlaybackSpeed(bool)), normalAction, SLOT(setEnabled(bool)));

    m_keyReference->registerShortcut(fastAction);
    m_keyReference->registerShortcut(slowAction);
    m_keyReference->registerShortcut(normalAction);

    m_rightButtonPlaybackMenu->addAction(fastAction);
    m_rightButtonPlaybackMenu->addAction(slowAction);
    m_rightButtonPlaybackMenu->addAction(normalAction);

    toolbar = addToolBar(tr("Edit Toolbar"));
    CommandHistory::getInstance()->registerToolbar(toolbar);

    toolbar = addToolBar(tr("Tools Toolbar"));
    QActionGroup *group = new QActionGroup(this);

    m_keyReference->setCategory(tr("Tool Selection"));
    QAction *action = toolbar->addAction(il.load("navigate"),
                                         tr("Navigate"));
    action->setCheckable(true);
    action->setChecked(true);
    action->setShortcut(tr("1"));
    action->setStatusTip(tr("Navigate"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolNavigateSelected()));
    connect(this, SIGNAL(replacedDocument()), action, SLOT(trigger()));
    group->addAction(action);
    m_keyReference->registerShortcut(action);
    m_toolActions[ViewManager::NavigateMode] = action;
    
    m_keyReference->setCategory
        (tr("Navigate Tool Mouse Actions"));
    m_keyReference->registerShortcut
        (tr("Navigate"), tr("Left"), 
         tr("Click left button and drag to move around"));
    m_keyReference->registerShortcut
        (tr("Zoom to Area"), tr("Shift+Left"), 
         tr("Shift-click left button and drag to zoom to a rectangular area"));
    m_keyReference->registerShortcut
        (tr("Relocate"), tr("Double-Click Left"), 
         tr("Double-click left button to jump to clicked location"));
    m_keyReference->registerShortcut
        (tr("Edit"), tr("Double-Click Left"), 
         tr("Double-click left button on an item to edit it"));

    m_keyReference->setCategory(tr("Tool Selection"));
    action = toolbar->addAction(il.load("select"),
                                tr("Select"));
    action->setCheckable(true);
    action->setShortcut(tr("2"));
    action->setStatusTip(tr("Select ranges"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolSelectSelected()));
    group->addAction(action);
    m_keyReference->registerShortcut(action);
    m_toolActions[ViewManager::SelectMode] = action;
        
    m_keyReference->setCategory
        (tr("Select Tool Mouse Actions"));
    m_keyReference->registerShortcut
        (tr("Select"), tr("Left"), 
         tr("Click left button and drag to select region; drag region edge to resize"));
#ifdef Q_OS_MAC
    m_keyReference->registerShortcut
        (tr("Multi Select"), tr("Ctrl+Left"), 
         tr("Cmd-click left button and drag to select an additional region"));
#else
    m_keyReference->registerShortcut
        (tr("Multi Select"), tr("Ctrl+Left"), 
         tr("Ctrl-click left button and drag to select an additional region"));
#endif
    m_keyReference->registerShortcut
        (tr("Fine Select"), tr("Shift+Left"), 
        tr("Shift-click left button and drag to select without snapping to items or grid"));

    m_keyReference->setCategory(tr("Tool Selection"));
    action = toolbar->addAction(il.load("move"),
                                tr("Edit"));
    action->setCheckable(true);
    action->setShortcut(tr("3"));
    action->setStatusTip(tr("Edit items in layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolEditSelected()));
    connect(this, SIGNAL(canEditLayer(bool)), action, SLOT(setEnabled(bool)));
    group->addAction(action);
    m_keyReference->registerShortcut(action);
    m_toolActions[ViewManager::EditMode] = action;
    
    m_keyReference->setCategory
        (tr("Edit Tool Mouse Actions"));
    m_keyReference->registerShortcut
        (tr("Move"), tr("Left"), 
        tr("Click left button on an item or selected region and drag to move"));
    m_keyReference->registerShortcut
        (tr("Edit"), tr("Double-Click Left"), 
        tr("Double-click left button on an item to edit it"));

    m_keyReference->setCategory(tr("Tool Selection"));
    action = toolbar->addAction(il.load("draw"),
                                tr("Draw"));
    action->setCheckable(true);
    action->setShortcut(tr("4"));
    action->setStatusTip(tr("Draw new items in layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolDrawSelected()));
    connect(this, SIGNAL(canEditLayer(bool)), action, SLOT(setEnabled(bool)));
    group->addAction(action);
    m_keyReference->registerShortcut(action);
    m_toolActions[ViewManager::DrawMode] = action;

    m_keyReference->setCategory
        (tr("Draw Tool Mouse Actions"));
    m_keyReference->registerShortcut
        (tr("Draw"), tr("Left"), 
        tr("Click left button and drag to create new item"));

    m_keyReference->setCategory(tr("Tool Selection"));
    action = toolbar->addAction(il.load("erase"),
                                tr("Erase"));
    action->setCheckable(true);
    action->setShortcut(tr("5"));
    action->setStatusTip(tr("Erase items from layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolEraseSelected()));
    connect(this, SIGNAL(canEditLayer(bool)), action, SLOT(setEnabled(bool)));
    group->addAction(action);
    m_keyReference->registerShortcut(action);
    m_toolActions[ViewManager::EraseMode] = action;

    m_keyReference->setCategory
        (tr("Erase Tool Mouse Actions"));
    m_keyReference->registerShortcut
        (tr("Erase"), tr("Left"), 
        tr("Click left button on an item to remove it from the layer"));

    m_keyReference->setCategory(tr("Tool Selection"));
    action = toolbar->addAction(il.load("measure"), tr("Measure"));
    action->setCheckable(true);
    action->setShortcut(tr("6"));
    action->setStatusTip(tr("Make measurements in layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolMeasureSelected()));
    connect(this, SIGNAL(canMeasureLayer(bool)), action, SLOT(setEnabled(bool)));
    group->addAction(action);
    m_keyReference->registerShortcut(action);
    m_toolActions[ViewManager::MeasureMode] = action;

    m_keyReference->setCategory
        (tr("Measure Tool Mouse Actions"));
    m_keyReference->registerShortcut
        (tr("Measure Area"), tr("Left"), 
        tr("Click left button and drag to measure a rectangular area"));
    m_keyReference->registerShortcut
        (tr("Measure Item"), tr("Double-Click Left"), 
        tr("Click left button and drag to measure extents of an item or shape"));
    m_keyReference->registerShortcut
        (tr("Zoom to Area"), tr("Shift+Left"), 
        tr("Shift-click left button and drag to zoom to a rectangular area"));

    toolNavigateSelected();

    Pane::registerShortcuts(*m_keyReference);
}

void
MainWindow::connectLayerEditDialog(ModelDataTableDialog *dialog)
{
    MainWindowBase::connectLayerEditDialog(dialog);
    QToolBar *toolbar = dialog->getPlayToolbar();
    if (toolbar) {
        toolbar->addAction(m_rwdStartAction);
        toolbar->addAction(m_rwdAction);
        toolbar->addAction(m_playAction);
        toolbar->addAction(m_ffwdAction);
        toolbar->addAction(m_ffwdEndAction);
    }
}

void
MainWindow::updateMenuStates()
{
    MainWindowBase::updateMenuStates();

    Pane *currentPane = 0;
    Layer *currentLayer = 0;

    if (m_paneStack) currentPane = m_paneStack->getCurrentPane();
    if (currentPane) currentLayer = currentPane->getSelectedLayer();

    bool haveCurrentPane =
        (currentPane != 0);
    bool haveCurrentLayer =
        (haveCurrentPane &&
         (currentLayer != 0));
    bool havePlayTarget =
        (m_playTarget != 0 || m_audioIO != 0);
    bool haveSelection = 
        (m_viewManager &&
         !m_viewManager->getSelections().empty());
    bool haveCurrentEditableLayer =
        (haveCurrentLayer &&
         currentLayer->isLayerEditable());
    bool haveCurrentTimeInstantsLayer = 
        (haveCurrentLayer &&
         dynamic_cast<TimeInstantLayer *>(currentLayer));
    bool haveCurrentTimeValueLayer = 
        (haveCurrentLayer &&
         dynamic_cast<TimeValueLayer *>(currentLayer));
    
    bool alignMode = m_viewManager && m_viewManager->getAlignMode();
    emit canChangeSolo(havePlayTarget && !alignMode);
    emit canAlign(havePlayTarget && m_document && m_document->canAlign());

    emit canChangePlaybackSpeed(true);
    int v = m_playSpeed->value();
    emit canSpeedUpPlayback(v < m_playSpeed->maximum());
    emit canSlowDownPlayback(v > m_playSpeed->minimum());

    if (m_viewManager && 
        (m_viewManager->getToolMode() == ViewManager::MeasureMode)) {
        emit canDeleteSelection(haveCurrentLayer);
        m_deleteSelectedAction->setText(tr("&Delete Current Measurement"));
        m_deleteSelectedAction->setStatusTip(tr("Delete the measurement currently under the mouse pointer"));
    } else {
        emit canDeleteSelection(haveSelection && haveCurrentEditableLayer);
        m_deleteSelectedAction->setText(tr("&Delete Selected Items"));
        m_deleteSelectedAction->setStatusTip(tr("Delete items in current selection from the current layer"));
    }

    if (m_ffwdAction && m_rwdAction) {
        if (haveCurrentTimeInstantsLayer) {
            m_ffwdAction->setText(tr("Fast Forward to Next Instant"));
            m_ffwdAction->setStatusTip(tr("Fast forward to the next time instant in the current layer"));
            m_rwdAction->setText(tr("Rewind to Previous Instant"));
            m_rwdAction->setStatusTip(tr("Rewind to the previous time instant in the current layer"));
        } else if (haveCurrentTimeValueLayer) {
            m_ffwdAction->setText(tr("Fast Forward to Next Point"));
            m_ffwdAction->setStatusTip(tr("Fast forward to the next point in the current layer"));
            m_rwdAction->setText(tr("Rewind to Previous Point"));
            m_rwdAction->setStatusTip(tr("Rewind to the previous point in the current layer"));
        } else {
            m_ffwdAction->setText(tr("Fast Forward"));
            m_ffwdAction->setStatusTip(tr("Fast forward"));
            m_rwdAction->setText(tr("Rewind"));
            m_rwdAction->setStatusTip(tr("Rewind"));
        }
    }
}

void
MainWindow::updateDescriptionLabel()
{
    if (!getMainModel()) {
        m_descriptionLabel->setText(tr("No audio file loaded."));
        return;
    }

    QString description;

//!!!???
    
    sv_samplerate_t ssr = getMainModel()->getSampleRate();
    sv_samplerate_t tsr = ssr;
    if (m_playSource) tsr = m_playSource->getDeviceSampleRate();

    if (ssr != tsr) {
        description = tr("%1Hz (resampling to %2Hz)").arg(ssr).arg(tsr);
    } else {
        description = QString("%1Hz").arg(ssr);
    }

    description = QString("%1 - %2")
        .arg(RealTime::frame2RealTime(getMainModel()->getEndFrame(), ssr)
             .toText(false).c_str())
        .arg(description);

    m_descriptionLabel->setText(description);
}

void
MainWindow::documentModified()
{
    //!!!
    MainWindowBase::documentModified();
}

void
MainWindow::documentRestored()
{
    //!!!
    MainWindowBase::documentRestored();
}

void
MainWindow::toolNavigateSelected()
{
    m_viewManager->setToolMode(ViewManager::NavigateMode);
}

void
MainWindow::toolSelectSelected()
{
    m_viewManager->setToolMode(ViewManager::SelectMode);
}

void
MainWindow::toolEditSelected()
{
    m_viewManager->setToolMode(ViewManager::EditMode);
}

void
MainWindow::toolDrawSelected()
{
    m_viewManager->setToolMode(ViewManager::DrawMode);
}

void
MainWindow::toolEraseSelected()
{
    m_viewManager->setToolMode(ViewManager::EraseMode);
}

void
MainWindow::toolMeasureSelected()
{
    m_viewManager->setToolMode(ViewManager::MeasureMode);
}

void
MainWindow::importAudio()
{
    QString path = getOpenFileName(FileFinder::AudioFile);

    if (path != "") {
        if (openAudio(path, ReplaceSession) == FileOpenFailed) {
            emit hideSplash();
            QMessageBox::critical(this, tr("Failed to open file"),
                                  tr("<b>File open failed</b><p>Audio file \"%1\" could not be opened").arg(path));
        }
    }
}

void
MainWindow::importMoreAudio()
{
    QString path = getOpenFileName(FileFinder::AudioFile);

    if (path != "") {
        if (openAudio(path, CreateAdditionalModel) == FileOpenFailed) {
            emit hideSplash();
            QMessageBox::critical(this, tr("Failed to open file"),
                                  tr("<b>File open failed</b><p>Audio file \"%1\" could not be opened").arg(path));
        }
    }
}

void
MainWindow::replaceMainAudio()
{
    QString path = getOpenFileName(FileFinder::AudioFile);

    if (path != "") {
        if (openAudio(path, ReplaceMainModel) == FileOpenFailed) {
            emit hideSplash();
            QMessageBox::critical(this, tr("Failed to open file"),
                                  tr("<b>File open failed</b><p>Audio file \"%1\" could not be opened").arg(path));
        }
    }
}

void
MainWindow::exportAudio()
{
    exportAudio(false);
}

void
MainWindow::exportAudioData()
{
    exportAudio(true);
}

void
MainWindow::exportAudio(bool asData)
{
    if (!getMainModel()) return;

    RangeSummarisableTimeValueModel *model = getMainModel();
    std::set<RangeSummarisableTimeValueModel *> otherModels;
    RangeSummarisableTimeValueModel *current = model;
    if (m_paneStack) {
        for (int i = 0; i < m_paneStack->getPaneCount(); ++i) {
            Pane *pane = m_paneStack->getPane(i);
            if (!pane) continue;
            for (int j = 0; j < pane->getLayerCount(); ++j) {
                Layer *layer = pane->getLayer(j);
                if (!layer) continue;
                cerr << "layer = " << layer->objectName() << endl;
                Model *m = layer->getModel();
                RangeSummarisableTimeValueModel *wm = 
                    dynamic_cast<RangeSummarisableTimeValueModel *>(m);
                if (wm) {
                    cerr << "found: " << wm->objectName() << endl;
                    otherModels.insert(wm);
                    if (pane == m_paneStack->getCurrentPane()) {
                        current = wm;
                    }
                }
            }
        }
    }
    if (!otherModels.empty()) {
        std::map<QString, RangeSummarisableTimeValueModel *> m;
        m[tr("1. %2").arg(model->objectName())] = model;
        int n = 2;
        int c = 0;
        for (std::set<RangeSummarisableTimeValueModel *>::const_iterator i
                 = otherModels.begin();
             i != otherModels.end(); ++i) {
            if (*i == model) continue;
            m[tr("%1. %2").arg(n).arg((*i)->objectName())] = *i;
            ++n;
            if (*i == current) c = n-1;
        }
        QStringList items;
        for (std::map<QString, RangeSummarisableTimeValueModel *>
                 ::const_iterator i = m.begin();
             i != m.end(); ++i) {
            items << i->first;
        }
        if (items.size() > 1) {
            bool ok = false;
            QString item = QInputDialog::getItem
                (this, tr("Select audio file to export"),
                 tr("Which audio file do you want to export from?"),
                 items, c, false, &ok);
            if (!ok || item.isEmpty()) return;
            if (m.find(item) == m.end()) {
                cerr << "WARNING: Model " << item
                     << " not found in list!" << endl;
            } else {
                model = m[item];
            }
        }
    }

    QString path;
    if (asData) {
        path = getSaveFileName(FileFinder::CSVFile);
    } else {
        path = getSaveFileName(FileFinder::AudioFile);
    }
    if (path == "") return;

    bool ok = false;
    QString error;

    MultiSelection ms = m_viewManager->getSelection();
    MultiSelection::SelectionList selections = m_viewManager->getSelections();

    bool multiple = false;

    MultiSelection *selectionToWrite = 0;

    if (selections.size() == 1) {

        QStringList items;
        items << tr("Export the selected region only")
              << tr("Export the whole audio file");
        
        bool ok = false;
        QString item = ListInputDialog::getItem
            (this, tr("Select region to export"),
             tr("Which region from the original audio file do you want to export?"),
             items, 0, &ok);
        
        if (!ok || item.isEmpty()) return;
        
        if (item == items[0]) selectionToWrite = &ms;

    } else if (selections.size() > 1) {

        if (!asData) { // Multi-file export not supported for data

            QStringList items;
            items << tr("Export the selected regions into a single file")
                  << tr("Export the selected regions into separate files")
                  << tr("Export the whole file");

            QString item = ListInputDialog::getItem
                (this, tr("Select region to export"),
                 tr("Multiple regions of the original audio file are selected.\nWhat do you want to export?"),
                 items, 0, &ok);
            
            if (!ok || item.isEmpty()) return;
            
            if (item == items[0]) {
                selectionToWrite = &ms;
            } else if (item == items[1]) {
                multiple = true;
            }

        } else { // asData
            selectionToWrite = &ms;
        }

        if (multiple) { // Can only happen when asData false

            int n = 1;
            QString base = path;
            base.replace(".wav", "");

            for (MultiSelection::SelectionList::iterator i = selections.begin();
                 i != selections.end(); ++i) {

                MultiSelection subms;
                subms.setSelection(*i);

                QString subpath = QString("%1.%2.wav").arg(base).arg(n);
                ++n;

                if (QFileInfo(subpath).exists()) {
                    error = tr("Fragment file %1 already exists, aborting").arg(subpath);
                    break;
                }

                WavFileWriter subwriter(subpath,
                                        model->getSampleRate(),
                                        model->getChannelCount(),
                                        WavFileWriter::WriteToTemporary);
                subwriter.writeModel(model, &subms);
                ok = subwriter.isOK();

                if (!ok) {
                    error = subwriter.getError();
                    break;
                }
            }
        }
    }

    if (!multiple) {
        if (asData) {
            stop();
            ProgressDialog dialog {
                QObject::tr("Exporting audio data..."),
                true,
                0,
                this,
                Qt::ApplicationModal
            };
            CSVFileWriter writer(path, model, &dialog,
                                 ((QFileInfo(path).suffix() == "csv") ?
                                  "," : "\t"));
            if (selectionToWrite) {
                writer.writeSelection(*selectionToWrite);
            } else {
                writer.write();
            }
            ok = writer.isOK();
            error = writer.getError();
        } else {
            WavFileWriter writer(path,
                                 model->getSampleRate(),
                                 model->getChannelCount(),
                                 WavFileWriter::WriteToTemporary);
            writer.writeModel(model, selectionToWrite);
            ok = writer.isOK();
            error = writer.getError();
        }
    }

    if (ok) {
        if (multiple) {
            emit activity(tr("Export multiple audio files"));
        } else {
            emit activity(tr("Export audio to \"%1\"").arg(path));
            m_recentFiles.addFile(path);
        }
    } else {
        QMessageBox::critical(this, tr("Failed to write file"), error);
    }
}

void
MainWindow::convertAudio()
{
    QString path = getOpenFileName(FileFinder::CSVFile);
    if (path == "") return;

    sv_samplerate_t defaultRate = 44100;
    
    CSVFormat format(path);
    format.setModelType(CSVFormat::WaveFileModel);
    format.setTimingType(CSVFormat::ImplicitTiming);
    format.setTimeUnits(CSVFormat::TimeAudioFrames);
    format.setSampleRate(defaultRate); // as a default for the dialog

    {
        CSVAudioFormatDialog *dialog = new CSVAudioFormatDialog(this, format);
        if (dialog->exec() != QDialog::Accepted) {
            delete dialog;
            return;
        }
        format = dialog->getFormat();
        delete dialog;
    }
    
    FileOpenStatus status = FileOpenSucceeded;

    ProgressDialog *progress = new ProgressDialog
        (tr("Converting audio data..."), true, 0, this, Qt::ApplicationModal);
    
    WaveFileModel *model = qobject_cast<WaveFileModel *>
        (DataFileReaderFactory::loadCSV
         (path, format,
          getMainModel() ? getMainModel()->getSampleRate() : defaultRate,
          progress));

    if (progress->wasCancelled()) {

        delete model;
        status = FileOpenCancelled;

    } else if (!model || !model->isOK()) {

        delete model;
        status = FileOpenFailed;

    } else {

        status = addOpenedAudioModel(path,
                                     model,
                                     CreateAdditionalModel,
                                     getDefaultSessionTemplate(),
                                     false);
    }

    delete progress;
    
    if (status == FileOpenFailed) {
        emit hideSplash();
        QMessageBox::critical(this, tr("Failed to open file"),
                              tr("<b>File open failed</b><p>Audio data file %1 could not be opened.").arg(path));
    }
}

void
MainWindow::importLayer()
{
    Pane *pane = m_paneStack->getCurrentPane();
    
    if (!pane) {
        // shouldn't happen, as the menu action should have been disabled
        cerr << "WARNING: MainWindow::importLayer: no current pane" << endl;
        return;
    }

    if (!getMainModel()) {
        // shouldn't happen, as the menu action should have been disabled
        cerr << "WARNING: MainWindow::importLayer: No main model -- hence no default sample rate available" << endl;
        return;
    }

    QString path = getOpenFileName(FileFinder::LayerFile);

    if (path != "") {

        FileOpenStatus status = openLayer(path);
        
        if (status == FileOpenFailed) {
            emit hideSplash();
            QMessageBox::critical(this, tr("Failed to open file"),
                                  tr("<b>File open failed</b><p>Layer file %1 could not be opened.").arg(path));
            return;
        } else if (status == FileOpenWrongMode) {
            emit hideSplash();
            QMessageBox::critical(this, tr("Failed to open file"),
                                  tr("<b>Audio required</b><p>Unable to load layer data from \"%1\" without an audio file.<br>Please load at least one audio file before importing annotations.").arg(path));
        }
    }
}

void
MainWindow::exportLayer()
{
    Pane *pane = m_paneStack->getCurrentPane();
    if (!pane) return;

    Layer *layer = pane->getSelectedLayer();
    if (!layer) return;

    Model *model = layer->getModel();
    if (!model) return;

    FileFinder::FileType type = FileFinder::LayerFileNoMidi;

    if (dynamic_cast<NoteModel *>(model)) type = FileFinder::LayerFile;

    QString path = getSaveFileName(type);

    if (path == "") return;

    if (QFileInfo(path).suffix() == "") path += ".svl";

    QString suffix = QFileInfo(path).suffix().toLower();

    QString error;

    if (suffix == "xml" || suffix == "svl") {

        QFile file(path);
        if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
            error = tr("Failed to open file %1 for writing").arg(path);
        } else {
            QTextStream out(&file);
            out.setCodec(QTextCodec::codecForName("UTF-8"));
            out << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
                << "<!DOCTYPE sonic-visualiser>\n"
                << "<sv>\n"
                << "  <data>\n";

            model->toXml(out, "    ");

            out << "  </data>\n"
                << "  <display>\n";

            layer->toXml(out, "    ");

            out << "  </display>\n"
                << "</sv>\n";
        }

    } else if (suffix == "mid" || suffix == "midi") {

        NoteModel *nm = dynamic_cast<NoteModel *>(model);

        if (!nm) {
            error = tr("Can't export non-note layers to MIDI");
        } else {
            MIDIFileWriter writer(path, nm, nm->getSampleRate());
            writer.write();
            if (!writer.isOK()) {
                error = writer.getError();
            }
        }

    } else if (suffix == "ttl" || suffix == "n3") {

        if (!RDFExporter::canExportModel(model)) {
            error = tr("Sorry, cannot export this layer type to RDF (supported types are: region, note, text, time instants, time values)");
        } else {
            RDFExporter exporter(path, model);
            exporter.write();
            if (!exporter.isOK()) {
                error = exporter.getError();
            }
        }

    } else {

        CSVFileWriter writer(path, model,
                             ((suffix == "csv") ? "," : "\t"));
        writer.write();

        if (!writer.isOK()) {
            error = writer.getError();
        }
    }

    if (error != "") {
        QMessageBox::critical(this, tr("Failed to write file"), error);
    } else {
        m_recentFiles.addFile(path);
        emit activity(tr("Export layer to \"%1\"").arg(path));
    }
}

void
MainWindow::exportImage()
{
    Pane *pane = m_paneStack->getCurrentPane();
    if (!pane) return;
    
    QString path = getSaveFileName(FileFinder::ImageFile);
    if (path == "") return;
    if (QFileInfo(path).suffix() == "") path += ".png";
    
    bool haveSelection = m_viewManager && !m_viewManager->getSelections().empty();

    QSize total, visible, selected;
    total = pane->getRenderedImageSize();
    visible = pane->getRenderedPartImageSize(pane->getFirstVisibleFrame(),
                                             pane->getLastVisibleFrame());

    sv_frame_t sf0 = 0, sf1 = 0;
 
    if (haveSelection) {
        MultiSelection::SelectionList selections = m_viewManager->getSelections();
        sf0 = selections.begin()->getStartFrame();
        MultiSelection::SelectionList::iterator e = selections.end();
        --e;
        sf1 = e->getEndFrame();
        selected = pane->getRenderedPartImageSize(sf0, sf1);
    }

    QStringList items;
    items << tr("Export the whole pane (%1x%2 pixels)")
        .arg(total.width()).arg(total.height());
    items << tr("Export the visible area only (%1x%2 pixels)")
        .arg(visible.width()).arg(visible.height());
    if (haveSelection) {
        items << tr("Export the selection extent (%1x%2 pixels)")
            .arg(selected.width()).arg(selected.height());
    } else {
        items << tr("Export the selection extent");
    }

    QSettings settings;
    settings.beginGroup("MainWindow");
    int deflt = settings.value("lastimageexportregion", 0).toInt();
    if (deflt == 2 && !haveSelection) deflt = 1;
    if (deflt == 0 && total.width() > 32767) deflt = 1;

    ListInputDialog *lid = new ListInputDialog
        (this, tr("Select region to export"),
         tr("Which region of the current pane do you want to export as an image?"),
         items, deflt);

    if (!haveSelection) {
        lid->setItemAvailability(2, false);
    }
    if (total.width() > 32767) { // appears to be limit of a QImage
        lid->setItemAvailability(0, false);
        lid->setFootnote(tr("Note: the whole pane is too wide to be exported as a single image."));
    }

    bool ok = lid->exec();
    QString item = lid->getCurrentString();
    delete lid;
            
    if (!ok || item.isEmpty()) return;

    settings.setValue("lastimageexportregion", deflt);

    QImage *image = 0;
    
    if (item == items[0]) {
        image = pane->renderToNewImage();
    } else if (item == items[1]) {
        image = pane->renderPartToNewImage(pane->getFirstVisibleFrame(),
                                           pane->getLastVisibleFrame());
    } else if (haveSelection) {
        image = pane->renderPartToNewImage(sf0, sf1);
    }
    
    if (!image) return;
    
    if (!image->save(path, "PNG")) {
        QMessageBox::critical(this, tr("Failed to save image file"),
                              tr("Failed to save image file %1").arg(path));
    }
    
    delete image;
}

void
MainWindow::exportSVG()
{
    Pane *pane = m_paneStack->getCurrentPane();
    if (!pane) return;
    
    QString path = getSaveFileName(FileFinder::SVGFile);
    if (path == "") return;
    if (QFileInfo(path).suffix() == "") path += ".svg";

    bool haveSelection = m_viewManager && !m_viewManager->getSelections().empty();

    sv_frame_t sf0 = 0, sf1 = 0;
 
    if (haveSelection) {
        MultiSelection::SelectionList selections = m_viewManager->getSelections();
        sf0 = selections.begin()->getStartFrame();
        MultiSelection::SelectionList::iterator e = selections.end();
        --e;
        sf1 = e->getEndFrame();
    }

    QStringList items;
    items << tr("Export the whole pane");
    items << tr("Export the visible area only");
    items << tr("Export the selection extent");

    QSettings settings;
    settings.beginGroup("MainWindow");
    int deflt = settings.value("lastsvgexportregion", 0).toInt();
    if (deflt == 2 && !haveSelection) deflt = 1;

    ListInputDialog *lid = new ListInputDialog
        (this, tr("Select region to export"),
         tr("Which region of the current pane do you want to export as a scalable SVG image?"),
         items, deflt);

    if (!haveSelection) {
        lid->setItemAvailability(2, false);
    }

    bool ok = lid->exec();
    QString item = lid->getCurrentString();
    delete lid;
            
    if (!ok || item.isEmpty()) return;

    settings.setValue("lastsvgexportregion", deflt);

    bool result = false;
        
    if (item == items[0]) {
        result = pane->renderToSvgFile(path );
    } else if (item == items[1]) {
        result = pane->renderPartToSvgFile(path,
                                           pane->getFirstVisibleFrame(),
                                           pane->getLastVisibleFrame());
    } else if (haveSelection) {
        result = pane->renderPartToSvgFile(path, sf0, sf1);
    }
    
    if (!result) {
        QMessageBox::critical(this, tr("Failed to save SVG file"),
                              tr("Failed to save SVG file %1").arg(path));
    }
}

void
MainWindow::browseRecordedAudio()
{
    if (!m_recordTarget) return;

    QString path = RecordDirectory::getRecordContainerDirectory();
    if (path == "") path = RecordDirectory::getRecordDirectory();
    if (path == "") return;

    openLocalFolder(path);
}

void
MainWindow::newSession()
{
    if (!checkSaveModified()) return;

    closeSession();
    stop();
    createDocument();

    Pane *pane = m_paneStack->addPane();

    connect(pane, SIGNAL(contextHelpChanged(const QString &)),
            this, SLOT(contextHelpChanged(const QString &)));

    if (!m_timeRulerLayer) {
        m_timeRulerLayer = m_document->createMainModelLayer
            (LayerFactory::TimeRuler);
    }

    m_document->addLayerToView(pane, m_timeRulerLayer);

    Layer *waveform = m_document->createMainModelLayer(LayerFactory::Waveform);
    m_document->addLayerToView(pane, waveform);

    m_overview->registerView(pane);

    CommandHistory::getInstance()->clear();
    CommandHistory::getInstance()->documentSaved();
    documentRestored();
    updateMenuStates();
}

void
MainWindow::documentReplaced()
{
    if (m_document) {
        connect(m_document, SIGNAL(activity(QString)),
                m_activityLog, SLOT(activityHappened(QString)));
    }
}

void
MainWindow::closeSession()
{
    if (!checkSaveModified()) return;

    while (m_paneStack->getPaneCount() > 0) {

        Pane *pane = m_paneStack->getPane(m_paneStack->getPaneCount() - 1);

        while (pane->getLayerCount() > 0) {
            m_document->removeLayerFromView
                (pane, pane->getLayer(pane->getLayerCount() - 1));
        }

        m_overview->unregisterView(pane);
        m_paneStack->deletePane(pane);
    }

    while (m_paneStack->getHiddenPaneCount() > 0) {

        Pane *pane = m_paneStack->getHiddenPane
            (m_paneStack->getHiddenPaneCount() - 1);

        while (pane->getLayerCount() > 0) {
            m_document->removeLayerFromView
                (pane, pane->getLayer(pane->getLayerCount() - 1));
        }

        m_overview->unregisterView(pane);
        m_paneStack->deletePane(pane);
    }

    delete m_layerTreeDialog.data();
    delete m_preferencesDialog.data();

    m_activityLog->hide();
    m_unitConverter->hide();
    m_keyReference->hide();

    delete m_document;
    m_document = 0;
    m_viewManager->clearSelections();
    m_timeRulerLayer = 0; // document owned this

    m_sessionFile = "";
    setWindowTitle(QApplication::applicationName());

    CommandHistory::getInstance()->clear();
    CommandHistory::getInstance()->documentSaved();
    documentRestored();
}

void
MainWindow::openSomething()
{
    QString orig = m_audioFile;
    if (orig == "") orig = ".";
    else orig = QFileInfo(orig).absoluteDir().canonicalPath();

    QString path = getOpenFileName(FileFinder::AnyFile);

    if (path.isEmpty()) return;

    FileOpenStatus status = openPath(path, ReplaceSession);

    if (status == FileOpenFailed) {
        emit hideSplash();
        QMessageBox::critical(this, tr("Failed to open file"),
                              tr("<b>File open failed</b><p>File \"%1\" could not be opened").arg(path));
    } else if (status == FileOpenWrongMode) {
        emit hideSplash();
        QMessageBox::critical(this, tr("Failed to open file"),
                              tr("<b>Audio required</b><p>Unable to load layer data from \"%1\" without an audio file.<br>Please load at least one audio file before importing annotations.").arg(path));
    }
}

void
MainWindow::openLocation()
{
    QSettings settings;
    settings.beginGroup("MainWindow");
    QString lastLocation = settings.value("lastremote", "").toString();

    bool ok = false;
    QString text = QInputDialog::getText
        (this, tr("Open Location"),
         tr("Please enter the URL of the location to open:"),
         QLineEdit::Normal, lastLocation, &ok);

    if (!ok) return;

    settings.setValue("lastremote", text);

    if (text.isEmpty()) return;

    FileOpenStatus status = openPath(text, AskUser);

    if (status == FileOpenFailed) {
        emit hideSplash();
        QMessageBox::critical(this, tr("Failed to open location"),
                              tr("<b>Open failed</b><p>URL \"%1\" could not be opened").arg(text));
    } else if (status == FileOpenWrongMode) {
        emit hideSplash();
        QMessageBox::critical(this, tr("Failed to open location"),
                              tr("<b>Audio required</b><p>Unable to load layer data from \"%1\" without an audio file.<br>Please load at least one audio file before importing annotations.").arg(text));
    }
}

void
MainWindow::openRecentFile(const QString& path)
{
   /* F. Nicol patch 13 Aug. 2016 */
#if 0
    QObject *obj = sender();
    QAction *action = dynamic_cast<QAction *>(obj);
    
    if (!action) {
        cerr << "WARNING: MainWindow::openRecentFile: sender is not an action"
                  << endl;
        return;
    }

    QString path = action->text();
#endif
   /* End of F. Nicol patch 13 Aug. 2016 */

    if (path == "") return;

    FileOpenStatus status = openPath(path, ReplaceSession);

    if (status == FileOpenFailed) {
        emit hideSplash();
        QMessageBox::critical(this, tr("Failed to open location"),
                              tr("<b>Open failed</b><p>File or URL \"%1\" could not be opened").arg(path));
    } else if (status == FileOpenWrongMode) {
        emit hideSplash();
        QMessageBox::critical(this, tr("Failed to open location"),
                              tr("<b>Audio required</b><p>Unable to load layer data from \"%1\" without an audio file.<br>Please load at least one audio file before importing annotations.").arg(path));
    }
}

void
MainWindow::applyTemplate()
{
    QObject *s = sender();
    QAction *action = qobject_cast<QAction *>(s);

    if (!action) {
        cerr << "WARNING: MainWindow::applyTemplate: sender is not an action"
                  << endl;
        return;
    }

    QString n = action->objectName();
    if (n == "") n = action->text();

    if (n == "") {
        cerr << "WARNING: MainWindow::applyTemplate: sender has no name"
                  << endl;
        return;
    }

    QString mainModelLocation;
    WaveFileModel *mm = getMainModel();
    if (mm) mainModelLocation = mm->getLocation();
    if (mainModelLocation != "") {
        openAudio(mainModelLocation, ReplaceSession, n);
    } else {
        openSessionTemplate(n);
    }
}

void
MainWindow::saveSessionAsTemplate()
{
    QDialog *d = new QDialog(this);
    d->setWindowTitle(tr("Enter template name"));

    QGridLayout *layout = new QGridLayout;
    d->setLayout(layout);

    layout->addWidget(new QLabel(tr("Please enter a name for the saved template:")),
                 0, 0);
    QLineEdit *lineEdit = new QLineEdit;
    layout->addWidget(lineEdit, 1, 0);
    QCheckBox *makeDefault = new QCheckBox(tr("Set as default template for future audio files"));
    layout->addWidget(makeDefault, 2, 0);
    
    QDialogButtonBox *bb = new QDialogButtonBox(QDialogButtonBox::Ok |
                                                QDialogButtonBox::Cancel);
    layout->addWidget(bb, 3, 0);
    connect(bb, SIGNAL(accepted()), d, SLOT(accept()));
    connect(bb, SIGNAL(accepted()), d, SLOT(accept()));
    connect(bb, SIGNAL(rejected()), d, SLOT(reject()));
    
    if (d->exec() == QDialog::Accepted) {

        QString name = lineEdit->text();
        name.replace(QRegExp("[^\\w\\s\\.\"'-]"), "_");

        ResourceFinder rf;
        QString dir = rf.getResourceSaveDir("templates");
        QString filename = QString("%1/%2.svt").arg(dir).arg(name);
        if (QFile(filename).exists()) {
            if (QMessageBox::warning(this,
                                     tr("Template file exists"),
                                     tr("<b>Template file exists</b><p>The template \"%1\" already exists.<br>Overwrite it?").arg(name),
                                     QMessageBox::Ok | QMessageBox::Cancel,
                                     QMessageBox::Cancel) != QMessageBox::Ok) {
                delete d;
                return;
            }
        }

        if (saveSessionTemplate(filename)) {
            if (makeDefault->isChecked()) {
                setDefaultSessionTemplate(name);
            }
        }
    }

    delete d;
}

void
MainWindow::manageSavedTemplates()
{
    ResourceFinder rf;
    openLocalFolder(rf.getResourceSaveDir("templates"));
}

void
MainWindow::paneAdded(Pane *pane)
{
    if (m_overview) m_overview->registerView(pane);
}    

void
MainWindow::paneHidden(Pane *pane)
{
    if (m_overview) m_overview->unregisterView(pane); 
}    

void
MainWindow::paneAboutToBeDeleted(Pane *pane)
{
    if (m_overview) m_overview->unregisterView(pane); 
}    

void
MainWindow::paneDropAccepted(Pane *pane, QStringList uriList)
{
    if (pane) m_paneStack->setCurrentPane(pane);

    for (QStringList::iterator i = uriList.begin(); i != uriList.end(); ++i) {

        FileOpenStatus status;

        if (i == uriList.begin()) {
            status = openPath(*i, ReplaceCurrentPane);
        } else {
            status = openPath(*i, CreateAdditionalModel);
        }

        if (status == FileOpenFailed) {
            emit hideSplash();
            QMessageBox::critical(this, tr("Failed to open dropped URL"),
                                  tr("<b>Open failed</b><p>Dropped URL \"%1\" could not be opened").arg(*i));
            break;
        } else if (status == FileOpenWrongMode) {
            emit hideSplash();
            QMessageBox::critical(this, tr("Failed to open dropped URL"),
                                  tr("<b>Audio required</b><p>Unable to load layer data from \"%1\" without an audio file.<br>Please load at least one audio file before importing annotations.").arg(*i));
            break;
        } else if (status == FileOpenCancelled) {
            break;
        }
    }
}

void
MainWindow::paneDropAccepted(Pane *pane, QString text)
{
    if (pane) m_paneStack->setCurrentPane(pane);

    QUrl testUrl(text);
    if (testUrl.scheme() == "file" || 
        testUrl.scheme() == "http" || 
        testUrl.scheme() == "ftp") {
        QStringList list;
        list.push_back(text);
        paneDropAccepted(pane, list);
        return;
    }

    //!!! open as text -- but by importing as if a CSV, or just adding
    //to a text layer?
}

void
MainWindow::closeEvent(QCloseEvent *e)
{
    SVDEBUG << "MainWindow::closeEvent" << endl;

    if (m_openingAudioFile) {
        SVCERR << "Busy - ignoring close event" << endl;
        e->ignore();
        return;
    }

    if (!m_abandoning && !checkSaveModified()) {
        SVCERR << "Close refused by user - ignoring close event" << endl;
        e->ignore();
        return;
    }

    QSettings settings;
    settings.beginGroup("MainWindow");
    settings.setValue("maximised", isMaximized());
    if (!isMaximized()) {
        settings.setValue("size", size());
        settings.setValue("position", pos());
    }
    settings.endGroup();

    if (m_preferencesDialog &&
        m_preferencesDialog->isVisible()) {
        m_preferencesDialog->applicationClosing(true);
    }

    closeSession();

    e->accept();

    return;
}

bool
MainWindow::commitData(bool mayAskUser)
{
    if (mayAskUser) {
        bool rv = checkSaveModified();
        if (rv) {
            if (m_preferencesDialog &&
                m_preferencesDialog->isVisible()) {
                m_preferencesDialog->applicationClosing(false);
            }
        }
        return rv;
    } else {
        if (m_preferencesDialog &&
            m_preferencesDialog->isVisible()) {
            m_preferencesDialog->applicationClosing(true);
        }
        if (!m_documentModified) return true;

        // If we can't check with the user first, then we can't save
        // to the original session file (even if we have it) -- have
        // to use a temporary file

        QString svDirBase = ".sv1";
        QString svDir = QDir::home().filePath(svDirBase);

        if (!QFileInfo(svDir).exists()) {
            if (!QDir::home().mkdir(svDirBase)) return false;
        } else {
            if (!QFileInfo(svDir).isDir()) return false;
        }
        
        // This name doesn't have to be unguessable
#ifndef _WIN32
        QString fname = QString("tmp-%1-%2.sv")
            .arg(QDateTime::currentDateTime().toString("yyyyMMddhhmmsszzz"))
            .arg(QProcess().pid());
#else
        QString fname = QString("tmp-%1.sv")
            .arg(QDateTime::currentDateTime().toString("yyyyMMddhhmmsszzz"));
#endif
        QString fpath = QDir(svDir).filePath(fname);
        if (saveSessionFile(fpath)) {
            m_recentFiles.addFile(fpath);
            emit activity(tr("Export image to \"%1\"").arg(fpath));
            return true;
        } else {
            return false;
        }
    }
}

bool
MainWindow::checkSaveModified()
{
    // Called before some destructive operation (e.g. new session,
    // exit program).  Return true if we can safely proceed, false to
    // cancel.

    if (!m_documentModified) return true;

    emit hideSplash();

    int button = 
        QMessageBox::warning(this,
                             tr("Session modified"),
                             tr("<b>Session modified</b><p>The current session has been modified.<br>Do you want to save it?"),
                             QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel,
                             QMessageBox::Yes);

    if (button == QMessageBox::Yes) {
        saveSession();
        if (m_documentModified) { // save failed -- don't proceed!
            return false;
        } else {
            return true; // saved, so it's safe to continue now
        }
    } else if (button == QMessageBox::No) {
        m_documentModified = false; // so we know to abandon it
        return true;
    }

    // else cancel
    return false;
}

bool
MainWindow::shouldCreateNewSessionForRDFAudio(bool *cancel)
{
    //!!! This is very similar to part of MainWindowBase::openAudio --
    //!!! make them a bit more uniform

    QSettings settings;
    settings.beginGroup("MainWindow");
    bool prevNewSession = settings.value("newsessionforrdfaudio", true).toBool();
    settings.endGroup();
    bool newSession = true;
            
    QStringList items;
    items << tr("Close the current session and create a new one")
          << tr("Add this data to the current session");

    bool ok = false;
    QString item = ListInputDialog::getItem
        (this, tr("Select target for import"),
         tr("<b>Select a target for import</b><p>This RDF document refers to one or more audio files.<br>You already have an audio waveform loaded.<br>What would you like to do with the new data?"),
         items, prevNewSession ? 0 : 1, &ok);
            
    if (!ok || item.isEmpty()) {
        *cancel = true;
        return false;
    }
            
    newSession = (item == items[0]);
    settings.beginGroup("MainWindow");
    settings.setValue("newsessionforrdfaudio", newSession);
    settings.endGroup();

    if (newSession) return true;
    else return false;
}

void
MainWindow::saveSession()
{
    if (m_sessionFile != "") {
        if (!saveSessionFile(m_sessionFile)) {
            QMessageBox::critical(this, tr("Failed to save file"),
                                  tr("<b>Save failed</b><p>Session file \"%1\" could not be saved.").arg(m_sessionFile));
        } else {
            CommandHistory::getInstance()->documentSaved();
            documentRestored();
        }
    } else {
        saveSessionAs();
    }
}

void
MainWindow::saveSessionAs()
{
    QString orig = m_audioFile;
    if (orig == "") orig = ".";
    else orig = QFileInfo(orig).absoluteDir().canonicalPath();

    QString path = getSaveFileName(FileFinder::SessionFile);

    if (path == "") return;

    if (!saveSessionFile(path)) {
        QMessageBox::critical(this, tr("Failed to save file"),
                              tr("<b>Save failed</b><p>Session file \"%1\" could not be saved.").arg(path));
    } else {
        setWindowTitle(tr("%1: %2")
                       .arg(QApplication::applicationName())
                       .arg(QFileInfo(path).fileName()));
        m_sessionFile = path;
        CommandHistory::getInstance()->documentSaved();
        documentRestored();
        m_recentFiles.addFile(path);
        emit activity(tr("Save session as \"%1\"").arg(path));
    }
}

void
MainWindow::preferenceChanged(PropertyContainer::PropertyName name)
{
    MainWindowBase::preferenceChanged(name);

    if (name == "Background Mode") {
        coloursChanged();
    }     
}

void
MainWindow::coloursChanged()
{
    QSettings settings;
    settings.beginGroup("Preferences");
    QString defaultColourName(tr("Green"));
    if (m_viewManager && m_viewManager->getGlobalDarkBackground()) {
        defaultColourName = tr("Bright Green");
    }
    ColourDatabase *cdb = ColourDatabase::getInstance();
    QColor colour = QColor
        (settings.value("overview-colour",
                        cdb->getColour(defaultColourName).name()).toString());
    settings.endGroup();

    int index = cdb->getColourIndex(colour);
    if (index >= 0) {
        m_panLayer->setBaseColour(index);
    }
}

void
MainWindow::propertyStacksResized(int width)
{
//    SVDEBUG << "MainWindow::propertyStacksResized(" << width << ")" << endl;

    if (!m_playControlsSpacer) return;

    int spacerWidth = width - m_playControlsWidth - 4;
    
//    SVDEBUG << "resizing spacer from " << m_playControlsSpacer->width() << " to " << spacerWidth << endl;

    m_playControlsSpacer->setFixedSize(QSize(spacerWidth, 2));
}

void
MainWindow::addPane()
{
    QObject *s = sender();
    QAction *action = dynamic_cast<QAction *>(s);

    cerr << "addPane: sender is " << s << ", action is " << action << ", name " << action->text() << endl;
    
    if (!action) {
        cerr << "WARNING: MainWindow::addPane: sender is not an action"
                  << endl;
        return;
    }

    PaneActionMap::iterator i = m_paneActions.find(action);

    if (i == m_paneActions.end()) {
        cerr << "WARNING: MainWindow::addPane: unknown action "
                  << action->objectName() << endl;
        cerr << "known actions are:" << endl;
        for (PaneActionMap::const_iterator i = m_paneActions.begin();
             i != m_paneActions.end(); ++i) {
            cerr << i->first << ", name " << i->first->text() << endl;
        }
        return;
    }

    addPane(i->second, action->text());
}

void
MainWindow::addPane(const LayerConfiguration &configuration, QString text)
{
    CommandHistory::getInstance()->startCompoundOperation(text, true);

    AddPaneCommand *command = new AddPaneCommand(this);
    CommandHistory::getInstance()->addCommand(command);

    Pane *pane = command->getPane();

    if (configuration.layer == LayerFactory::Spectrum) {
        pane->setPlaybackFollow(PlaybackScrollContinuous);
        pane->setFollowGlobalZoom(false);
        pane->setZoomLevel(ZoomLevel(ZoomLevel::FramesPerPixel, 512));
    }

    if (configuration.layer != LayerFactory::TimeRuler &&
        configuration.layer != LayerFactory::Spectrum) {

        if (!m_timeRulerLayer) {
//            cerr << "no time ruler layer, creating one" << endl;
            m_timeRulerLayer = m_document->createMainModelLayer
                (LayerFactory::TimeRuler);
        }

//        SVDEBUG << "adding time ruler layer " << m_timeRulerLayer << endl;

        m_document->addLayerToView(pane, m_timeRulerLayer);
    }

    Layer *newLayer = m_document->createLayer(configuration.layer);

    Model *suggestedModel = configuration.sourceModel;
    Model *model = 0;

    if (suggestedModel) {

        // check its validity
        std::vector<Model *> inputModels = m_document->getTransformInputModels();
        for (size_t j = 0; j < inputModels.size(); ++j) {
            if (inputModels[j] == suggestedModel) {
                model = suggestedModel;
                break;
            }
        }

        if (!model) {
            cerr << "WARNING: Model " << (void *)suggestedModel
                      << " appears in pane action map, but is not reported "
                      << "by document as a valid transform source" << endl;
        }
    }

    if (!model) {
        model = m_document->getMainModel();
    }

    m_document->setModel(newLayer, model);

    m_document->setChannel(newLayer, configuration.channel);
    m_document->addLayerToView(pane, newLayer);

    m_paneStack->setCurrentPane(pane);
    m_paneStack->setCurrentLayer(pane, newLayer);

//    SVDEBUG << "MainWindow::addPane: global centre frame is "
//              << m_viewManager->getGlobalCentreFrame() << endl;
//    pane->setCentreFrame(m_viewManager->getGlobalCentreFrame());

    CommandHistory::getInstance()->endCompoundOperation();

    updateMenuStates();
}

void
MainWindow::addLayer()
{
    QObject *s = sender();
    QAction *action = dynamic_cast<QAction *>(s);
    
    if (!action) {
        cerr << "WARNING: MainWindow::addLayer: sender is not an action"
                  << endl;
        return;
    }

    Pane *pane = m_paneStack->getCurrentPane();
    
    if (!pane) {
        cerr << "WARNING: MainWindow::addLayer: no current pane" << endl;
        return;
    }

    ExistingLayerActionMap::iterator ei = m_existingLayerActions.find(action);

    if (ei != m_existingLayerActions.end()) {
        Layer *newLayer = ei->second;
        m_document->addLayerToView(pane, newLayer);
        m_paneStack->setCurrentLayer(pane, newLayer);
        return;
    }

    ei = m_sliceActions.find(action);

    if (ei != m_sliceActions.end()) {
        Layer *newLayer = m_document->createLayer(LayerFactory::Slice);
//        document->setModel(newLayer, ei->second->getModel());
        SliceableLayer *source = dynamic_cast<SliceableLayer *>(ei->second);
        SliceLayer *dest = dynamic_cast<SliceLayer *>(newLayer);
        if (source && dest) {
            //!!!???
            dest->setSliceableModel(source->getSliceableModel());
            connect(source, SIGNAL(sliceableModelReplaced(const Model *, const Model *)),
                    dest, SLOT(sliceableModelReplaced(const Model *, const Model *)));
            connect(m_document, SIGNAL(modelAboutToBeDeleted(Model *)),
                    dest, SLOT(modelAboutToBeDeleted(Model *)));
        }
        m_document->addLayerToView(pane, newLayer);
        m_paneStack->setCurrentLayer(pane, newLayer);
        return;
    }

    TransformActionMap::iterator i = m_transformActions.find(action);

    if (i == m_transformActions.end()) {

        LayerActionMap::iterator i = m_layerActions.find(action);
        
        if (i == m_layerActions.end()) {
            cerr << "WARNING: MainWindow::addLayer: unknown action "
                      << action->objectName() << endl;
            return;
        }

        LayerFactory::LayerType type = i->second.layer;
        
        LayerFactory::LayerTypeSet emptyTypes =
            LayerFactory::getInstance()->getValidEmptyLayerTypes();

        Layer *newLayer = 0;

        if (emptyTypes.find(type) != emptyTypes.end()) {

            newLayer = m_document->createEmptyLayer(type);
            if (newLayer) {
                m_toolActions[ViewManager::DrawMode]->trigger();
            }

        } else {

            Model *model = i->second.sourceModel;

            cerr << "model = "<< model << endl;

            if (!model) {
                if (type == LayerFactory::TimeRuler) {
                    newLayer = m_document->createMainModelLayer(type);
                } else {
                    // if model is unspecified and this is not a
                    // time-ruler layer, use any plausible model from
                    // the current pane -- this is the case for
                    // right-button menu layer additions
                    Pane::ModelSet ms = pane->getModels();
                    foreach (Model *m, ms) {
                        RangeSummarisableTimeValueModel *r =
                            dynamic_cast<RangeSummarisableTimeValueModel *>(m);
                        if (r) model = m;
                    }
                    if (!model) model = getMainModel();
                }
            }

            if (model) {
                newLayer = m_document->createLayer(type);
                if (m_document->isKnownModel(model)) {
                    m_document->setChannel(newLayer, i->second.channel);
                    m_document->setModel(newLayer, model);
                } else {
                    cerr << "WARNING: MainWindow::addLayer: unknown model "
                              << model
                              << " (\""
                              << model->objectName()
                              << "\") in layer action map"
                              << endl;
                }
            }
        }

        if (newLayer) {
            m_document->addLayerToView(pane, newLayer);
            m_paneStack->setCurrentLayer(pane, newLayer);
        }

        return;
    }

    //!!! want to do something like this, but it's not supported in
    //ModelTransformerFactory yet
    /*
    int channel = -1;
    // pick up the default channel from any existing layers on the same pane
    for (int j = 0; j < pane->getLayerCount(); ++j) {
        int c = LayerFactory::getInstance()->getChannel(pane->getLayer(j));
        if (c != -1) {
            channel = c;
            break;
        }
    }
    */

    // We always ask for configuration, even if the plugin isn't
    // supposed to be configurable, because we need to let the user
    // change the execution context (block size etc).

    QString transformId = i->second;

    addLayer(transformId);
}

void
MainWindow::addLayer(QString transformId)
{
    Pane *pane = m_paneStack->getCurrentPane();
    if (!pane) {
        cerr << "WARNING: MainWindow::addLayer: no current pane" << endl;
        return;
    }

    Transform transform;
    try {
        transform = TransformFactory::getInstance()->
            getDefaultTransformFor(transformId);
    } catch (std::exception &e) { // e.g. Piper server failure
        QMessageBox::critical
            (this, tr("Failed to query transform attributes"),
             tr("<b>Failed to query transform attributes</b><p>Plugin or server error: %1</p>")
             .arg(e.what()));
        return;
    }

    std::vector<Model *> candidateInputModels =
        m_document->getTransformInputModels();

    Model *defaultInputModel = 0;

    for (int j = 0; j < pane->getLayerCount(); ++j) {

        Layer *layer = pane->getLayer(j);
        if (!layer) continue;

        if (LayerFactory::getInstance()->getLayerType(layer) !=
            LayerFactory::Waveform &&
            !layer->isLayerOpaque()) continue;

        Model *model = layer->getModel();
        if (!model) continue;

        for (size_t k = 0; k < candidateInputModels.size(); ++k) {
            if (candidateInputModels[k] == model) {
                defaultInputModel = model;
                break;
            }
        }

        if (defaultInputModel) break;
    }

    AggregateWaveModel *aggregate = 0;
    
    if (candidateInputModels.size() > 1) {
        // Add an aggregate model as another option
        AggregateWaveModel::ChannelSpecList sl;
        foreach (Model *m, candidateInputModels) {
            RangeSummarisableTimeValueModel *r =
                qobject_cast<RangeSummarisableTimeValueModel *>(m);
            if (r) {
                sl.push_back(AggregateWaveModel::ModelChannelSpec(r, -1));
            }
        }
        if (!sl.empty()) {
            aggregate = new AggregateWaveModel(sl);
            aggregate->setObjectName(tr("Multiplex all of the above"));
            candidateInputModels.push_back(aggregate);
        }
    }
    
    sv_frame_t startFrame = 0, duration = 0;
    sv_frame_t endFrame = 0;
    m_viewManager->getSelection().getExtents(startFrame, endFrame);
    if (endFrame > startFrame) duration = endFrame - startFrame;
    else startFrame = 0;

    TransformUserConfigurator configurator;

    ModelTransformer::Input input = ModelTransformerFactory::getInstance()->
        getConfigurationForTransform
        (transform,
         candidateInputModels,
         defaultInputModel,
         m_playSource,
         startFrame,
         duration,
         &configurator);

    if (aggregate) {
        if (input.getModel() == aggregate) {
            aggregate->setObjectName(tr("Multiplexed audio"));
            m_document->addAggregateModel(aggregate);
        } else {
            aggregate->aboutToDelete();
            delete aggregate;
        }
    }
    
    if (!input.getModel()) return;

//    SVDEBUG << "MainWindow::addLayer: Input model is " << input.getModel() << " \"" << input.getModel()->objectName() << "\"" << endl << "transform:" << endl << transform.toXmlString() << endl;

    try {
        Layer *newLayer = m_document->createDerivedLayer(transform, input);
        if (newLayer) {
            m_document->addLayerToView(pane, newLayer);
            m_document->setChannel(newLayer, input.getChannel());
            m_recentTransforms.add(transformId);
            m_paneStack->setCurrentLayer(pane, newLayer);
        }
    } catch (std::exception &e) { // e.g. Piper server failure
        QMessageBox::critical
            (this, tr("Transform failed"),
             tr("<b>Failed to run transform</b><p>Plugin or server error: %1</p>")
             .arg(e.what()));
        return;
    }
    
    updateMenuStates();
}

void
MainWindow::renameCurrentLayer()
{
    Pane *pane = m_paneStack->getCurrentPane();
    if (pane) {
        Layer *layer = pane->getSelectedLayer();
        if (layer) {
            bool ok = false;
            QString newName = QInputDialog::getText
                (this, tr("Rename Layer"),
                 tr("New name for this layer:"),
                 QLineEdit::Normal, layer->objectName(), &ok);
            if (ok) {
                layer->setPresentationName(newName);
                setupExistingLayersMenus();
            }
        }
    }
}

void
MainWindow::findTransform()
{
    TransformFinder *finder = new TransformFinder(this);
    if (!finder->exec()) {
        delete finder;
        return;
    }
    TransformId transform = finder->getTransform();
    delete finder;
    
    if (getMainModel() != 0 && m_paneStack->getCurrentPane() != 0) {
        addLayer(transform);
    }
}

void
MainWindow::playSoloToggled()
{
    MainWindowBase::playSoloToggled();
    m_soloModified = true;
}

void
MainWindow::alignToggled()
{
    QAction *action = dynamic_cast<QAction *>(sender());
    
    if (!m_viewManager) return;

    if (action) {
        m_viewManager->setAlignMode(action->isChecked());
    } else {
        m_viewManager->setAlignMode(!m_viewManager->getAlignMode());
    }

    if (m_viewManager->getAlignMode()) {
        m_prevSolo = m_soloAction->isChecked();
        if (!m_soloAction->isChecked()) {
            m_soloAction->setChecked(true);
            MainWindowBase::playSoloToggled();
        }
        m_soloModified = false;
        emit canChangeSolo(false);
        m_document->alignModels();
        m_document->setAutoAlignment(true);
    } else {
        if (!m_soloModified) {
            if (m_soloAction->isChecked() != m_prevSolo) {
                m_soloAction->setChecked(m_prevSolo);
                MainWindowBase::playSoloToggled();
            }
        }
        emit canChangeSolo(true);
        m_document->setAutoAlignment(false);
    }

    for (int i = 0; i < m_paneStack->getPaneCount(); ++i) {

        Pane *pane = m_paneStack->getPane(i);
        if (!pane) continue;

        pane->update();
    }
}

void
MainWindow::playSpeedChanged(int position)
{
    PlaySpeedRangeMapper mapper;

    double percent = m_playSpeed->mappedValue();
    double factor = mapper.getFactorForValue(percent);

//    cerr << "play speed position = " << position << " (range 0-120) percent = " << percent << " factor = " << factor << endl;

    int centre = m_playSpeed->defaultValue();

    // Percentage is shown to 0dp if >100, to 1dp if <100; factor is
    // shown to 3sf

    char pcbuf[30];
    char facbuf[30];
    
    if (position == centre) {
        contextHelpChanged(tr("Playback speed: Normal"));
    } else if (position < centre) {
        sprintf(pcbuf, "%.1f", percent);
        sprintf(facbuf, "%.3g", 1.0 / factor);
        contextHelpChanged(tr("Playback speed: %1% (%2x slower)")
                           .arg(pcbuf)
                           .arg(facbuf));
    } else {
        sprintf(pcbuf, "%.0f", percent);
        sprintf(facbuf, "%.3g", factor);
        contextHelpChanged(tr("Playback speed: %1% (%2x faster)")
                           .arg(pcbuf)
                           .arg(facbuf));
    }

    m_playSource->setTimeStretch(1.0 / factor); // factor is a speedup

    updateMenuStates();
}

void
MainWindow::speedUpPlayback()
{
    int value = m_playSpeed->value();
    value = value + m_playSpeed->pageStep();
    if (value > m_playSpeed->maximum()) value = m_playSpeed->maximum();
    m_playSpeed->setValue(value);
}

void
MainWindow::slowDownPlayback()
{
    int value = m_playSpeed->value();
    value = value - m_playSpeed->pageStep();
    if (value < m_playSpeed->minimum()) value = m_playSpeed->minimum();
    m_playSpeed->setValue(value);
}

void
MainWindow::restoreNormalPlayback()
{
    m_playSpeed->setValue(m_playSpeed->defaultValue());
}

void
MainWindow::currentPaneChanged(Pane *pane)
{
    MainWindowBase::currentPaneChanged(pane);

    if (!pane || !m_panLayer) return;

    // If this pane contains the main model, it usually makes sense to
    // show the main model in the pan layer even if it isn't the top
    // layer in the pane (e.g. if the top layer is one derived from
    // the main model).
    bool containsMainModel = false;
    for (int i = pane->getLayerCount(); i > 0; ) {
        --i;
        Layer *layer = pane->getLayer(i);
        if (layer &&
            LayerFactory::getInstance()->getLayerType(layer) ==
            LayerFactory::Waveform &&
            layer->getModel() == getMainModel()) {
            containsMainModel = true;
            break;
        }
    }

    bool panLayerSet = false;
    
    for (int i = pane->getLayerCount(); i > 0; ) {
        --i;
        Layer *layer = pane->getLayer(i);
        RangeSummarisableTimeValueModel *tvm = 
            qobject_cast<RangeSummarisableTimeValueModel *>(layer->getModel());
        if (tvm) {
            auto type = LayerFactory::getInstance()->getLayerType(layer);
            if (type != LayerFactory::TimeRuler) {
                updateLayerShortcutsFor(tvm);
            }
            if (type == LayerFactory::Waveform) {
                m_panLayer->setModel(tvm);
                panLayerSet = true;
                break;
            }
        }
    }

    if (containsMainModel && !panLayerSet) {
        m_panLayer->setModel(getMainModel());
    }
}

void
MainWindow::updateVisibleRangeDisplay(Pane *p) const
{
    if (!getMainModel() || !p) {
        return;
    }

    bool haveSelection = false;
    sv_frame_t startFrame = 0, endFrame = 0;

    if (m_viewManager && m_viewManager->haveInProgressSelection()) {

        bool exclusive = false;
        Selection s = m_viewManager->getInProgressSelection(exclusive);

        if (!s.isEmpty()) {
            haveSelection = true;
            startFrame = s.getStartFrame();
            endFrame = s.getEndFrame();
        }
    }

    if (!haveSelection) {
        startFrame = p->getFirstVisibleFrame();
        endFrame = p->getLastVisibleFrame();
    }

    RealTime start = RealTime::frame2RealTime
        (startFrame, getMainModel()->getSampleRate());

    RealTime end = RealTime::frame2RealTime
        (endFrame, getMainModel()->getSampleRate());

    RealTime duration = end - start;

    QString startStr, endStr, durationStr;
    startStr = start.toText(true).c_str();
    endStr = end.toText(true).c_str();
    durationStr = duration.toText(true).c_str();

    if (haveSelection) {
        m_myStatusMessage = tr("Selection: %1 to %2 (duration %3)")
            .arg(startStr).arg(endStr).arg(durationStr);
    } else {
        m_myStatusMessage = tr("Visible: %1 to %2 (duration %3)")
            .arg(startStr).arg(endStr).arg(durationStr);
    }

    if (getStatusLabel()->text() != m_myStatusMessage) {
        getStatusLabel()->setText(m_myStatusMessage);
    }

    updatePositionStatusDisplays();
}

void
MainWindow::updatePositionStatusDisplays() const
{
    if (!statusBar()->isVisible()) return;

    Pane *pane = 0;
    sv_frame_t frame = m_viewManager->getPlaybackFrame();

    if (m_paneStack) pane = m_paneStack->getCurrentPane();
    if (!pane) return;

    int layers = pane->getLayerCount();
    if (layers == 0) m_currentLabel->setText("");

    for (int i = layers-1; i >= 0; --i) {
        Layer *layer = pane->getLayer(i);
        if (!layer) continue;
        if (!layer->isLayerEditable()) continue;
        QString label = layer->getLabelPreceding
            (pane->alignFromReference(frame));
        m_currentLabel->setText(label);
        break;
    }
}

void
MainWindow::monitoringLevelsChanged(float left, float right)
{
    m_mainLevelPan->setMonitoringLevels(left, right);
}

void
MainWindow::sampleRateMismatch(sv_samplerate_t requested,
                               sv_samplerate_t actual,
                               bool willResample)
{
    if (!willResample) {
        emit hideSplash();
        QMessageBox::information
            (this, tr("Sample rate mismatch"),
             tr("<b>Wrong sample rate</b><p>The sample rate of this audio file (%1 Hz) does not match\nthe current playback rate (%2 Hz).<p>The file will play at the wrong speed and pitch.<p>Change the <i>Resample mismatching files on import</i> option under <i>File</i> -> <i>Preferences</i> if you want to alter this behaviour.")
             .arg(requested).arg(actual));
    }        

    updateDescriptionLabel();
}

void
MainWindow::audioOverloadPluginDisabled()
{
    QMessageBox::information
        (this, tr("Audio processing overload"),
         tr("<b>Overloaded</b><p>Audio effects plugin auditioning has been disabled due to a processing overload."));
}

void
MainWindow::audioTimeStretchMultiChannelDisabled()
{
    static bool shownOnce = false;
    if (shownOnce) return;
    QMessageBox::information
        (this, tr("Audio processing overload"),
         tr("<b>Overloaded</b><p>Audio playback speed processing has been reduced to a single channel, due to a processing overload."));
    shownOnce = true;
}

/*
void
MainWindow::betaReleaseWarning()
{
    QMessageBox::information
        (this, tr("Beta release"),
         tr("<b>This is a beta release of Sonic Visualiser</b><p>Please see the \"What's New\" option in the Help menu for a list of changes since the last proper release.</p>"));
}
*/

void
MainWindow::pluginPopulationWarning()
{
    QString scanWarning = PluginScan::getInstance()->getStartupFailureReport();
    QString factWarning = TransformFactory::getInstance()->getStartupFailureReport();
    QString warning;
    if (factWarning != "") {
        // The order of events on startup implies that, if scanWarning
        // and factWarning are both present, then we have already been
        // called once for scanWarning so don't want to report it again
        warning = factWarning;
    } else if (scanWarning != "") {
        warning = scanWarning;
    }
    if (warning != "") {
        emit hideSplash();
        QMessageBox box;
        box.setWindowTitle(tr("Problems loading plugins"));
        box.setText(tr("<b>Failed to load plugins</b>"));
        box.setInformativeText(warning);
        box.setIcon(QMessageBox::Warning);
        box.setStandardButtons(QMessageBox::Ok);
        box.exec();
    }
}

void
MainWindow::midiEventsAvailable()
{
    Pane *currentPane = 0;
    NoteLayer *currentNoteLayer = 0;
    TimeValueLayer *currentTimeValueLayer = 0;

    if (m_paneStack) {
        currentPane = m_paneStack->getCurrentPane();
    }

    if (currentPane) {
        currentNoteLayer = dynamic_cast<NoteLayer *>
            (currentPane->getSelectedLayer());
        currentTimeValueLayer = dynamic_cast<TimeValueLayer *>
            (currentPane->getSelectedLayer());
    } else {
        // discard these events
        while (m_midiInput->getEventsAvailable() > 0) {
            (void)m_midiInput->readEvent();
        }
        return;
    }

    // This is called through a serialised signal/slot invocation
    // (across threads).  It could happen quite some time after the
    // event was actually received, which is why event timestamping
    // happens in the MIDI input class and not here.

    while (m_midiInput->getEventsAvailable() > 0) {

        MIDIEvent ev(m_midiInput->readEvent());

        sv_frame_t frame = currentPane->alignFromReference(ev.getTime());

        bool noteOn = (ev.getMessageType() == MIDIConstants::MIDI_NOTE_ON &&
                       ev.getVelocity() > 0);

        bool noteOff = (ev.getMessageType() == MIDIConstants::MIDI_NOTE_OFF ||
                        (ev.getMessageType() == MIDIConstants::MIDI_NOTE_ON &&
                         ev.getVelocity() == 0));

        if (currentNoteLayer) {

            if (!m_playSource || !m_playSource->isPlaying()) continue;

            if (noteOn) {

                currentNoteLayer->addNoteOn(frame,
                                            ev.getPitch(),
                                            ev.getVelocity());

            } else if (noteOff) {

                currentNoteLayer->addNoteOff(frame,
                                             ev.getPitch());

            }

            continue;
        }

        if (currentTimeValueLayer) {

            if (!noteOn) continue;

            if (!m_playSource || !m_playSource->isPlaying()) continue;

            Model *model = static_cast<Layer *>(currentTimeValueLayer)->getModel();
            SparseTimeValueModel *tvm =
                dynamic_cast<SparseTimeValueModel *>(model);
            if (tvm) {
                SparseTimeValueModel::Point point(frame,
                                                  float(ev.getPitch() % 12),
                                                  "");
                SparseTimeValueModel::AddPointCommand *command =
                    new SparseTimeValueModel::AddPointCommand
                    (tvm, point, tr("Add Point"));
                CommandHistory::getInstance()->addCommand(command);
            }

            continue;
        }

        // This is reached only if !currentNoteLayer and
        // !currentTimeValueLayer, i.e. there is some other sort of
        // layer that may be insertable-into

        if (!noteOn) continue;
        insertInstantAt(ev.getTime());
    }
}    

void
MainWindow::playStatusChanged(bool )
{
    Pane *currentPane = 0;
    NoteLayer *currentNoteLayer = 0;

    if (m_paneStack) currentPane = m_paneStack->getCurrentPane();
    if (currentPane) {
        currentNoteLayer = dynamic_cast<NoteLayer *>(currentPane->getSelectedLayer());
    }

    if (currentNoteLayer) {
        currentNoteLayer->abandonNoteOns();
    }
}

void
MainWindow::layerRemoved(Layer *layer)
{
    setupExistingLayersMenus();
    MainWindowBase::layerRemoved(layer);
}

void
MainWindow::layerInAView(Layer *layer, bool inAView)
{
    setupExistingLayersMenus();
    MainWindowBase::layerInAView(layer, inAView);
}

void
MainWindow::modelAdded(Model *model)
{
    MainWindowBase::modelAdded(model);
    if (dynamic_cast<DenseTimeValueModel *>(model)) {
        setupPaneAndLayerMenus();
    }
}

void
MainWindow::mainModelChanged(WaveFileModel *model)
{
    m_panLayer->setModel(model);

    MainWindowBase::mainModelChanged(model);

    if (m_playTarget || m_audioIO) {
        connect(m_mainLevelPan, SIGNAL(levelChanged(float)),
                this, SLOT(mainModelGainChanged(float)));
        connect(m_mainLevelPan, SIGNAL(panChanged(float)),
                this, SLOT(mainModelPanChanged(float)));
    }
}

void
MainWindow::mainModelGainChanged(float gain)
{
    if (m_playTarget) {
        m_playTarget->setOutputGain(gain);
    } else if (m_audioIO) {
        m_audioIO->setOutputGain(gain);
    }
}

void
MainWindow::mainModelPanChanged(float balance)
{
    // this is indeed stereo balance rather than pan
    if (m_playTarget) {
        m_playTarget->setOutputBalance(balance);
    } else if (m_audioIO) {
        m_audioIO->setOutputBalance(balance);
    }
}

void
MainWindow::modelAboutToBeDeleted(Model *model)
{
    if (model == m_panLayer->getModel()) {
        if (model == getMainModel()) {
            m_panLayer->setModel(0);
        } else {
            m_panLayer->setModel(getMainModel());
        }
    }
    MainWindowBase::modelAboutToBeDeleted(model);
}

void
MainWindow::setInstantsNumbering()
{
    QAction *a = dynamic_cast<QAction *>(sender());
    if (!a) return;

    int type = m_numberingActions[a];
    
    if (m_labeller) m_labeller->setType(Labeller::ValueType(type));

    QSettings settings;
    settings.beginGroup("MainWindow");
    settings.setValue("labellertype", type);
    settings.endGroup();
}

void
MainWindow::setInstantsCounterCycle()
{
    QAction *a = dynamic_cast<QAction *>(sender());
    if (!a) return;
    
    int cycle = a->text().toInt();
    if (cycle == 0) return;

    if (m_labeller) m_labeller->setCounterCycleSize(cycle);
    
    QSettings settings;
    settings.beginGroup("MainWindow");
    settings.setValue("labellercycle", cycle);
    settings.endGroup();
}

void
MainWindow::setInstantsCounters()
{
    LabelCounterInputDialog dialog(m_labeller, this);
    dialog.setWindowTitle(tr("Reset Counters"));
    dialog.exec();
}

void
MainWindow::resetInstantsCounters()
{
    if (m_labeller) m_labeller->resetCounters();
}

void
MainWindow::subdivideInstants()
{
    QSettings settings;
    settings.beginGroup("MainWindow");
    int n = settings.value("subdivisions", 4).toInt();
    
    bool ok;

    n = QInputDialog::getInt(this,
                             tr("Subdivide instants"),
                             tr("Number of subdivisions:"),
                             n, 2, 96, 1, &ok);

    if (ok) {
        settings.setValue("subdivisions", n);
        subdivideInstantsBy(n);
    }

    settings.endGroup();
}

void
MainWindow::winnowInstants()
{
    QSettings settings;
    settings.beginGroup("MainWindow");
    int n = settings.value("winnow-subdivisions", 4).toInt();
    
    bool ok;

    n = QInputDialog::getInt(this,
                             tr("Winnow instants"),
                             tr("Remove all instants apart from multiples of:"),
                             n, 2, 96, 1, &ok);

    if (ok) {
        settings.setValue("winnow-subdivisions", n);
        winnowInstantsBy(n);
    }

    settings.endGroup();
}

void
MainWindow::modelGenerationFailed(QString transformName, QString message)
{
    emit hideSplash();

    QString quoted;
    if (transformName != "") {
        quoted = QString("\"%1\" ").arg(transformName);
    }
    
    if (message != "") {

        QMessageBox::warning
            (this,
             tr("Failed to generate layer"),
             tr("<b>Layer generation failed</b><p>Failed to generate derived layer.<p>The layer transform %1failed:<p>%2")
             .arg(quoted).arg(message),
             QMessageBox::Ok);
    } else {
        QMessageBox::warning
            (this,
             tr("Failed to generate layer"),
             tr("<b>Layer generation failed</b><p>Failed to generate a derived layer.<p>The layer transform %1failed.<p>No error information is available.")
             .arg(quoted),
             QMessageBox::Ok);
    }
}

void
MainWindow::modelGenerationWarning(QString /* transformName */, QString message)
{
    emit hideSplash();

    QMessageBox::warning
        (this, tr("Warning"), message, QMessageBox::Ok);
}

void
MainWindow::modelRegenerationFailed(QString layerName,
                                    QString transformName, QString message)
{
    emit hideSplash();

    if (message != "") {

        QMessageBox::warning
            (this,
             tr("Failed to regenerate layer"),
             tr("<b>Layer generation failed</b><p>Failed to regenerate derived layer \"%1\" using new data model as input.<p>The layer transform \"%2\" failed:<p>%3")
             .arg(layerName).arg(transformName).arg(message),
             QMessageBox::Ok);
    } else {
        QMessageBox::warning
            (this,
             tr("Failed to regenerate layer"),
             tr("<b>Layer generation failed</b><p>Failed to regenerate derived layer \"%1\" using new data model as input.<p>The layer transform \"%2\" failed.<p>No error information is available.")
             .arg(layerName).arg(transformName),
             QMessageBox::Ok);
    }
}

void
MainWindow::modelRegenerationWarning(QString layerName,
                                     QString /* transformName */,
                                     QString message)
{
    emit hideSplash();

    QMessageBox::warning
        (this, tr("Warning"), tr("<b>Warning when regenerating layer</b><p>When regenerating the derived layer \"%1\" using new data model as input:<p>%2").arg(layerName).arg(message), QMessageBox::Ok);
}

void
MainWindow::alignmentFailed(QString message)
{
    QMessageBox::warning
        (this,
         tr("Failed to calculate alignment"),
         tr("<b>Alignment calculation failed</b><p>Failed to calculate an audio alignment:<p>%1")
         .arg(message),
         QMessageBox::Ok);
}

void
MainWindow::rightButtonMenuRequested(Pane *pane, QPoint position)
{
//    SVDEBUG << "MainWindow::rightButtonMenuRequested(" << pane << ", " << position.x() << ", " << position.y() << ")" << endl;
    m_paneStack->setCurrentPane(pane);
    m_rightButtonMenu->popup(position);
}

void
MainWindow::showLayerTree()
{
    if (!m_layerTreeDialog.isNull()) {
        m_layerTreeDialog->show();
        m_layerTreeDialog->raise();
        return;
    }

    m_layerTreeDialog = new LayerTreeDialog(m_paneStack, this);
    m_layerTreeDialog->setAttribute(Qt::WA_DeleteOnClose); // see below
    m_layerTreeDialog->show();
}

void
MainWindow::showActivityLog()
{
    m_activityLog->show();
    m_activityLog->raise();
    m_activityLog->scrollToEnd();
}

void
MainWindow::showUnitConverter()
{
    m_unitConverter->show();
    m_unitConverter->raise();
}

void
MainWindow::preferences()
{
    bool goToTemplateTab =
        (sender() && sender()->objectName() == "set_default_template");

    if (!m_preferencesDialog.isNull()) {
        m_preferencesDialog->show();
        m_preferencesDialog->raise();
        if (goToTemplateTab) {
            m_preferencesDialog->switchToTab(PreferencesDialog::TemplateTab);
        }
        return;
    }

    m_preferencesDialog = new PreferencesDialog(this);

    connect(m_preferencesDialog, SIGNAL(audioDeviceChanged()),
            this, SLOT(recreateAudioIO()));
    connect(m_preferencesDialog, SIGNAL(coloursChanged()),
            this, SLOT(coloursChanged()));
    
    // DeleteOnClose is safe here, because m_preferencesDialog is a
    // QPointer that will be zeroed when the dialog is deleted.  We
    // use it in preference to leaving the dialog lying around because
    // if you Cancel the dialog, it resets the preferences state
    // without resetting its own widgets, so its state will be
    // incorrect when next shown unless we construct it afresh
    m_preferencesDialog->setAttribute(Qt::WA_DeleteOnClose);

    m_preferencesDialog->show();
    if (goToTemplateTab) {
        m_preferencesDialog->switchToTab(PreferencesDialog::TemplateTab);
    }
}

void
MainWindow::mouseEnteredWidget()
{
    QWidget *w = dynamic_cast<QWidget *>(sender());
    if (!w) return;

    QString mainText, editText;

    if (w == m_mainLevelPan) {
        mainText = tr("Adjust the master playback level and pan");
        editText = tr("click then drag to adjust, ctrl+click to reset");
    } else if (w == m_playSpeed) {
        mainText = tr("Adjust the master playback speed");
        editText = tr("drag up/down to adjust, ctrl+click to reset");
    }

    if (mainText != "") {
        contextHelpChanged(tr("%1: %2").arg(mainText).arg(editText));
    }
}

void
MainWindow::mouseLeftWidget()
{
    contextHelpChanged("");
}

void
MainWindow::website()
{
    openHelpUrl(tr("http://www.sonicvisualiser.org/"));
}

void
MainWindow::help()
{
    openHelpUrl(tr("http://www.sonicvisualiser.org/doc/reference/%1/en/").arg(SV_VERSION));
}

void
MainWindow::whatsNew()
{
    QFile changelog(":CHANGELOG");
    changelog.open(QFile::ReadOnly);
    QByteArray content = changelog.readAll();
    QString text = QString::fromUtf8(content);

    QDialog *d = new QDialog(this);
    d->setWindowTitle(tr("What's New"));
        
    QGridLayout *layout = new QGridLayout;
    d->setLayout(layout);

    int row = 0;
    
    QLabel *iconLabel = new QLabel;
    iconLabel->setPixmap(QApplication::windowIcon().pixmap(64, 64));
    layout->addWidget(iconLabel, row, 0);
    
    layout->addWidget
        (new QLabel(tr("<h3>What's New in %1</h3>")
                    .arg(QApplication::applicationName())),
         row++, 1);
    layout->setColumnStretch(2, 10);

    QTextEdit *textEdit = new QTextEdit;
    layout->addWidget(textEdit, row++, 1, 1, 2);

    if (m_newerVersionIs != "") {
        layout->addWidget(new QLabel(tr("<b>Note:</b> A newer version of Sonic Visualiser is available.<br>(Version %1 is available; you are using version %2)").arg(m_newerVersionIs).arg(SV_VERSION)), row++, 1, 1, 2);
    }
    
    QDialogButtonBox *bb = new QDialogButtonBox(QDialogButtonBox::Ok);
    layout->addWidget(bb, row++, 0, 1, 3);
    connect(bb, SIGNAL(accepted()), d, SLOT(accept()));

    text.replace(QRegExp("(.)\n +(.)"), "\\1 \\2");
    text.replace(QRegExp("\n - ([^\n]+)"), "\n<li>\\1</li>");
    text.replace(QRegExp(": *\n"), ":\n<ul>\n");
    text.replace(QRegExp("</li>\n\\s*\n"), "</li>\n</ul>\n\n");
    text.replace(QRegExp("\n(\\w[^:\n]+:)"), "\n<p><b>\\1</b></p>");
//    text.replace(QRegExp("<li>([^,.\n]+)([,.] +\\w)"), "<li><b>\\1</b>\\2");
    
    textEdit->setHtml(text);
    textEdit->setReadOnly(true);

    d->setMinimumSize(m_viewManager->scalePixelSize(520),
                      m_viewManager->scalePixelSize(450));
    
    d->exec();

    delete d;
}

QString
MainWindow::getReleaseText() const
{
    bool debug = false;
    QString version = "(unknown version)";

#ifdef BUILD_DEBUG
    debug = true;
#endif // BUILD_DEBUG
#ifdef SV_VERSION
#ifdef SVNREV
    version = tr("Release %1 : Revision %2").arg(SV_VERSION).arg(SVNREV);
#else // !SVNREV
    version = tr("Release %1").arg(SV_VERSION);
#endif // SVNREV
#else // !SV_VERSION
#ifdef SVNREV
    version = tr("Unreleased : Revision %1").arg(SVNREV);
#endif // SVNREV
#endif // SV_VERSION

    return tr("%1 : %2 configuration, %3-bit build")
        .arg(version)
        .arg(debug ? tr("Debug") : tr("Release"))
        .arg(sizeof(void *) * 8);
}

void
MainWindow::about()
{
    QString aboutText;

    aboutText += tr("<h3>About Sonic Visualiser</h3>");
    aboutText += tr("<p>Sonic Visualiser is a program for viewing and exploring audio data for semantic music analysis and annotation.<br><a href=\"http://www.sonicvisualiser.org/\">http://www.sonicvisualiser.org/</a></p>");
    aboutText += QString("<p><small>%1</small></p>").arg(getReleaseText());

    if (m_oscQueue && m_oscQueue->isOK()) {
        aboutText += tr("</small><p><small>The OSC URL for this instance is: \"%1\"").arg(m_oscQueue->getOSCURL());
    }

    aboutText += "</small><p><small>";

    aboutText += tr("With Qt v%1 &copy; The Qt Company").arg(QT_VERSION_STR);

    aboutText += "</small><small>";

#ifdef HAVE_JACK
#ifdef JACK_VERSION
    aboutText += tr("<br>With JACK audio output library v%1 &copy; Paul Davis and Jack O'Quin").arg(JACK_VERSION);
#else // !JACK_VERSION
    aboutText += tr("<br>With JACK audio output library &copy; Paul Davis and Jack O'Quin");
#endif // JACK_VERSION
#endif // HAVE_JACK
#ifdef HAVE_PORTAUDIO
    aboutText += tr("<br>With PortAudio audio output library &copy; Ross Bencina and Phil Burk");
#endif // HAVE_PORTAUDIO
#ifdef HAVE_LIBPULSE
#ifdef LIBPULSE_VERSION
    aboutText += tr("<br>With PulseAudio audio output library v%1 &copy; Lennart Poettering and Pierre Ossman").arg(LIBPULSE_VERSION);
#else // !LIBPULSE_VERSION
    aboutText += tr("<br>With PulseAudio audio output library &copy; Lennart Poettering and Pierre Ossman");
#endif // LIBPULSE_VERSION
#endif // HAVE_LIBPULSE
#ifdef HAVE_OGGZ
#ifdef OGGZ_VERSION
    aboutText += tr("<br>With Ogg file decoder (oggz v%1, fishsound v%2) &copy; CSIRO Australia").arg(OGGZ_VERSION).arg(FISHSOUND_VERSION);
#else // !OGGZ_VERSION
    aboutText += tr("<br>With Ogg file decoder &copy; CSIRO Australia");
#endif // OGGZ_VERSION
#endif // HAVE_OGGZ
#ifdef HAVE_MAD
#ifdef MAD_VERSION
    aboutText += tr("<br>With MAD mp3 decoder v%1 &copy; Underbit Technologies Inc").arg(MAD_VERSION);
#else // !MAD_VERSION
    aboutText += tr("<br>With MAD mp3 decoder &copy; Underbit Technologies Inc");
#endif // MAD_VERSION
#endif // HAVE_MAD
#ifdef HAVE_SAMPLERATE
#ifdef SAMPLERATE_VERSION
    aboutText += tr("<br>With libsamplerate v%1 &copy; Erik de Castro Lopo").arg(SAMPLERATE_VERSION);
#else // !SAMPLERATE_VERSION
    aboutText += tr("<br>With libsamplerate &copy; Erik de Castro Lopo");
#endif // SAMPLERATE_VERSION
#endif // HAVE_SAMPLERATE
#ifdef HAVE_SNDFILE
#ifdef SNDFILE_VERSION
    aboutText += tr("<br>With libsndfile v%1 &copy; Erik de Castro Lopo").arg(SNDFILE_VERSION);
#else // !SNDFILE_VERSION
    aboutText += tr("<br>With libsndfile &copy; Erik de Castro Lopo");
#endif // SNDFILE_VERSION
#endif // HAVE_SNDFILE
#ifdef HAVE_FFTW3F
#ifdef FFTW3_VERSION
    aboutText += tr("<br>With FFTW3 v%1 &copy; Matteo Frigo and MIT").arg(FFTW3_VERSION);
#else // !FFTW3_VERSION
    aboutText += tr("<br>With FFTW3 &copy; Matteo Frigo and MIT");
#endif // FFTW3_VERSION
#endif // HAVE_FFTW3F
#ifdef HAVE_RUBBERBAND
#ifdef RUBBERBAND_VERSION
    aboutText += tr("<br>With Rubber Band Library v%1 &copy; Particular Programs Ltd").arg(RUBBERBAND_VERSION);
#else // !RUBBERBAND_VERSION
    aboutText += tr("<br>With Rubber Band Library &copy; Particular Programs Ltd");
#endif // RUBBERBAND_VERSION
#endif // HAVE_RUBBERBAND
    aboutText += tr("<br>With Vamp plugin support (API v%1, host SDK v%2) &copy; Chris Cannam and QMUL").arg(VAMP_API_VERSION).arg(VAMP_SDK_VERSION);
    aboutText += tr("<br>With Piper Vamp protocol bridge &copy; QMUL");
    aboutText += tr("<br>With LADSPA plugin support (API v%1) &copy; Richard Furse, Paul Davis, Stefan Westerfeld").arg(LADSPA_VERSION);
    aboutText += tr("<br>With DSSI plugin support (API v%1) &copy; Chris Cannam, Steve Harris, Sean Bolton").arg(DSSI_VERSION);
#ifdef REDLAND_VERSION
    aboutText += tr("<br>With Redland RDF datastore v%1 &copy; Dave Beckett and the University of Bristol").arg(REDLAND_VERSION);
#else // !REDLAND_VERSION
    aboutText += tr("<br>With Redland RDF datastore &copy; Dave Beckett and the University of Bristol");
#endif // REDLAND_VERSION
    aboutText += tr("<br>With Serd and Sord RDF parser and store &copy; David Robillard");
    aboutText += tr("<br>With Dataquay Qt/RDF library &copy; Particular Programs Ltd");
    aboutText += tr("<br>With Cap'n Proto serialisation &copy; Sandstorm Development Group");
    aboutText += tr("<br>With RtMidi &copy; Gary P. Scavone");

#ifdef HAVE_LIBLO
#ifdef LIBLO_VERSION
    aboutText += tr("<br>With liblo Lite OSC library v%1 &copy; Steve Harris").arg(LIBLO_VERSION);
#else // !LIBLO_VERSION
    aboutText += tr("<br>With liblo Lite OSC library &copy; Steve Harris");
#endif // LIBLO_VERSION

    aboutText += "</small></p>";
#endif // HAVE_LIBLO

    aboutText += "<p><small>";
    aboutText += tr("Russian UI translation contributed by Alexandre Prokoudine.");
    aboutText += "<br>";
    aboutText += tr("Czech UI translation contributed by Pavel Fric.");
    aboutText += "</small></p>";

    aboutText += 
        "<p><small>Sonic Visualiser Copyright &copy; 2005&ndash;2018 Chris Cannam and "
        "Queen Mary, University of London.</small></p>";

    aboutText +=
        "<p><small>This program is free software; you can redistribute it and/or "
        "modify it under the terms of the GNU General Public License as "
        "published by the Free Software Foundation; either version 2 of the "
        "License, or (at your option) any later version.<br>See the file "
        "COPYING included with this distribution for more information.</small></p>";

    // use our own dialog so we can influence the size

    QDialog *d = new QDialog(this);

    d->setWindowTitle(tr("About %1").arg(QApplication::applicationName()));
        
    QGridLayout *layout = new QGridLayout;
    d->setLayout(layout);

    int row = 0;
    
    QLabel *iconLabel = new QLabel;
    iconLabel->setPixmap(QApplication::windowIcon().pixmap(64, 64));
    layout->addWidget(iconLabel, row, 0, Qt::AlignTop);

    QLabel *mainText = new QLabel();
    layout->addWidget(mainText, row, 1, 1, 2);

    layout->setRowStretch(row, 10);
    layout->setColumnStretch(1, 10);

    ++row;

    QDialogButtonBox *bb = new QDialogButtonBox(QDialogButtonBox::Ok);
    layout->addWidget(bb, row++, 0, 1, 3);
    connect(bb, SIGNAL(accepted()), d, SLOT(accept()));

//    mainText->setHtml(aboutText);
//    mainText->setReadOnly(true);
    mainText->setWordWrap(true);
    mainText->setOpenExternalLinks(true);
    mainText->setText(aboutText);

    d->setMinimumSize(m_viewManager->scalePixelSize(420),
                      m_viewManager->scalePixelSize(200));
    
    d->exec();

    delete d;
    /*
    QMessageBox about(QMessageBox::Information, 
                      tr("About Sonic Visualiser"),
                      aboutText,
                      QMessageBox::StandardButtons(QMessageBox::Ok),
                      this);

    QIcon icon = QApplication::windowIcon();
    QSize size = icon.actualSize(QSize(64, 64));
    about.setIconPixmap(icon.pixmap(size));

    about.setMinimumSize(m_viewManager->scalePixelSize(400),
                         m_viewManager->scalePixelSize(400));

    about.exec();
    */
}

void
MainWindow::keyReference()
{
    m_keyReference->show();
}

void
MainWindow::newerVersionAvailable(QString version)
{
    m_newerVersionIs = version;
    
    QSettings settings;
    settings.beginGroup("NewerVersionWarning");
    QString tag = QString("version-%1-available-show").arg(version);
    if (settings.value(tag, true).toBool()) {
        QString title(tr("Newer version available"));
        QString text(tr("<h3>Newer version available</h3><p>You are using version %1 of Sonic Visualiser, but version %2 is now available.</p><p>Please see the <a href=\"http://sonicvisualiser.org/\">Sonic Visualiser website</a> for more information.</p>").arg(SV_VERSION).arg(version));
        QMessageBox::information(this, title, text);
        settings.setValue(tag, false);
    }
    settings.endGroup();
}