view main/MainWindow.cpp @ 289:ee96e37a3cbb

* Make it possible to import an entire session from an RDF document.
  However, at the moment the timings of events appear to be constrained
  by how far the audio decoder has got through its audio file at the
  time the event is queried -- need to investigate.

/* -*- 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/NoteModel.h"
#include "data/model/Labeller.h"
#include "data/osc/OSCQueue.h"
#include "framework/Document.h"
#include "view/ViewManager.h"
#include "base/Preferences.h"
#include "layer/WaveformLayer.h"
#include "layer/TimeRulerLayer.h"
#include "layer/TimeInstantLayer.h"
#include "layer/TimeValueLayer.h"
#include "layer/Colour3DPlotLayer.h"
#include "layer/SliceLayer.h"
#include "layer/SliceableLayer.h"
#include "layer/ImageLayer.h"
#include "widgets/Fader.h"
#include "view/Overview.h"
#include "widgets/PropertyBox.h"
#include "widgets/PropertyStack.h"
#include "widgets/AudioDial.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 "audioio/AudioCallbackPlaySource.h"
#include "audioio/AudioCallbackPlayTarget.h"
#include "audioio/AudioTargetFactory.h"
#include "audioio/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/fft/FFTDataServer.h"
#include "base/RecentFiles.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"

// For version information
#include <vamp/vamp.h>
#include <vamp-hostsdk/PluginBase.h>
#include "plugin/api/ladspa.h"
#include "plugin/api/dssi.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 <QProcess>
#include <QShortcut>
#include <QSettings>
#include <QDateTime>
#include <QProcess>
#include <QCheckBox>
#include <QRegExp>
#include <QScrollArea>

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

using std::cerr;
using std::endl;

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


MainWindow::MainWindow(bool withAudioOutput, bool withOSCSupport) :
    MainWindowBase(withAudioOutput, withOSCSupport),
    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_rightButtonMenu(0),
    m_rightButtonLayerMenu(0),
    m_rightButtonTransformsMenu(0),
    m_rightButtonPlaybackMenu(0),
    m_soloAction(0),
    m_soloModified(false),
    m_prevSolo(false),
    m_rwdStartAction(0),
    m_rwdAction(0),
    m_ffwdAction(0),
    m_ffwdEndAction(0),
    m_playAction(0),
    m_playSelectionAction(0),
    m_playLoopAction(0),
    m_playControlsSpacer(0),
    m_playControlsWidth(0),
    m_preferencesDialog(0),
    m_layerTreeDialog(0),
    m_keyReference(new KeyReference())
{
    Profiler profiler("MainWindow::MainWindow");

    setWindowTitle(tr("Sonic Visualiser"));

    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);

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

    QGridLayout *layout = new QGridLayout;

    m_descriptionLabel = new QLabel; //!!! hang on, this is declared in base class -- should be declared and initialised by same class

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

    scroll->setWidget(m_paneStack);

    m_overview = new Overview(frame);
    m_overview->setViewManager(m_viewManager);
    m_overview->setFixedHeight(40);
#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);

    if (m_viewManager->getGlobalDarkBackground()) {
        m_panLayer->setBaseColour
            (ColourDatabase::getInstance()->getColourIndex(tr("Bright Green")));
    } else {
        m_panLayer->setBaseColour
            (ColourDatabase::getInstance()->getColourIndex(tr("Green")));
    }

    m_fader = new Fader(frame, false);
    connect(m_fader, SIGNAL(mouseEntered()), this, SLOT(mouseEnteredWidget()));
    connect(m_fader, SIGNAL(mouseLeft()), this, SLOT(mouseLeftWidget()));

    m_playSpeed = new AudioDial(frame);
    m_playSpeed->setMinimum(0);
    m_playSpeed->setMaximum(200);
    m_playSpeed->setValue(100);
    m_playSpeed->setFixedWidth(32);
    m_playSpeed->setFixedHeight(32);
    m_playSpeed->setNotchesVisible(true);
    m_playSpeed->setPageStep(10);
    m_playSpeed->setObjectName(tr("Playback Speedup"));
    m_playSpeed->setDefaultValue(100);
    m_playSpeed->setRangeMapper(new PlaySpeedRangeMapper(0, 200));
    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()));

    IconLoader il;

    QSettings settings;
    settings.beginGroup("MainWindow");
    settings.endGroup();

    m_playControlsSpacer = new QFrame;

    layout->setSpacing(4);
    layout->addWidget(scroll, 0, 0, 1, 5);
    layout->addWidget(m_overview, 1, 1);
    layout->addWidget(m_playControlsSpacer, 1, 2);
    layout->addWidget(m_playSpeed, 1, 3);
    layout->addWidget(m_fader, 1, 4);

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

    layout->setColumnMinimumWidth(0, 14);
    layout->setColumnStretch(0, 0);

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

    layout->setColumnStretch(1, 10);

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

    frame->setLayout(layout);

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

    statusBar();

    newSession();
    
    TransformFactory::getInstance()->startPopulationThread();
}

MainWindow::~MainWindow()
{
    delete m_keyReference;
    delete m_preferencesDialog;
    delete m_layerTreeDialog;
    Profiles::getInstance()->dump();
}

void
MainWindow::setupMenus()
{
    if (!m_mainMenusCreated) {
        m_rightButtonMenu = new QMenu();

        // No -- 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.  I'm not sure it ever would be, in a
        // context menu -- perhaps technically a Qt bug?
//        m_rightButtonMenu->setTearOffEnabled(true);
    }

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

    if (m_rightButtonTransformsMenu) {
        m_rightButtonTransformsMenu->clear();
    } else {
        m_rightButtonTransformsMenu = m_rightButtonMenu->addMenu(tr("&Transform"));
        m_rightButtonTransformsMenu->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::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");
    icon.addPixmap(il.loadPixmap("filenew-22"));
    QAction *action = new QAction(icon, tr("&New Session"), this);
    action->setShortcut(tr("Ctrl+N"));
    action->setStatusTip(tr("Abandon the current Sonic Visualiser session and start a new one"));
    connect(action, SIGNAL(triggered()), this, SLOT(newSession()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    toolbar->addAction(action);

    icon = il.load("fileopensession");
    action = new QAction(icon, tr("&Open Session..."), this);
    action->setShortcut(tr("Ctrl+O"));
    action->setStatusTip(tr("Open a previously saved Sonic Visualiser session file"));
    connect(action, SIGNAL(triggered()), this, SLOT(openSession()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    icon = il.load("fileopen");
    icon.addPixmap(il.loadPixmap("fileopen-22"));

    action = new QAction(icon, tr("&Open..."), this);
    action->setStatusTip(tr("Open a session file, audio file, or layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(openSomething()));
    toolbar->addAction(action);

    icon = il.load("filesave");
    icon.addPixmap(il.loadPixmap("filesave-22"));
    action = new QAction(icon, tr("&Save Session"), this);
    action->setShortcut(tr("Ctrl+S"));
    action->setStatusTip(tr("Save the current session into a Sonic Visualiser session file"));
    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");
    icon.addPixmap(il.loadPixmap("filesaveas-22"));
    action = new QAction(icon, tr("Save Session &As..."), this);
    action->setStatusTip(tr("Save the current session into a new Sonic Visualiser session file"));
    connect(action, SIGNAL(triggered()), this, SLOT(saveSessionAs()));
    menu->addAction(action);
    toolbar->addAction(action);

    menu->addSeparator();

    icon = il.load("fileopenaudio");
    action = new QAction(icon, tr("&Import Audio File..."), this);
    action->setShortcut(tr("Ctrl+I"));
    action->setStatusTip(tr("Import an existing audio file"));
    connect(action, SIGNAL(triggered()), this, SLOT(importAudio()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    action = new QAction(tr("Import Secondary Audio File..."), this);
    action->setShortcut(tr("Ctrl+Shift+I"));
    action->setStatusTip(tr("Import an extra audio file as a separate layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(importMoreAudio()));
    connect(this, SIGNAL(canImportMoreAudio(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    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 Layer..."), this);
    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)));
    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);

    menu->addSeparator();

    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);

    menu->addSeparator();

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

    menu->addSeparator();
    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 Sonic Visualiser"));
    connect(action, SIGNAL(triggered()), this, SLOT(close()));
    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);

    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("Enter"));
    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);

    // Laptop shortcut (no keypad Enter key)
    QString shortcut(tr(";"));
    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+Enter"));
    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);

    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("Set Numbering Counters..."), this);
    action->setStatusTip(tr("Set the counters used for counter-based labelling"));
    connect(action, SIGNAL(triggered()), this, SLOT(resetInstantsCounters()));
    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);
}

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);
    action = new QAction(tr("Scroll &Left"), this);
    action->setShortcut(tr("Left"));
    action->setStatusTip(tr("Scroll the current pane to the left"));
    connect(action, SIGNAL(triggered()), this, SLOT(scrollLeft()));
    connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
	
    action = new QAction(tr("Scroll &Right"), this);
    action->setShortcut(tr("Right"));
    action->setStatusTip(tr("Scroll the current pane to the right"));
    connect(action, SIGNAL(triggered()), this, SLOT(scrollRight()));
    connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
	
    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);

    menu->addSeparator();

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

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

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

    menu->addSeparator();

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

    QActionGroup *overlayGroup = new QActionGroup(this);
        
    action = new QAction(tr("Show &No Overlays"), this);
    action->setShortcut(tr("0"));
    action->setStatusTip(tr("Hide centre indicator, frame times, layer names and scale"));
    connect(action, SIGNAL(triggered()), this, SLOT(showNoOverlays()));
    action->setCheckable(true);
    action->setChecked(false);
    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 centre indicator only"));
    connect(action, SIGNAL(triggered()), this, SLOT(showMinimalOverlays()));
    action->setCheckable(true);
    action->setChecked(false);
    overlayGroup->addAction(action);
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
        
    action = new QAction(tr("Show &Standard Overlays"), this);
    action->setShortcut(tr("8"));
    action->setStatusTip(tr("Show centre indicator, frame times and scale"));
    connect(action, SIGNAL(triggered()), this, SLOT(showStandardOverlays()));
    action->setCheckable(true);
    action->setChecked(true);
    overlayGroup->addAction(action);
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
        
    action = new QAction(tr("Show &All Overlays"), this);
    action->setShortcut(tr("7"));
    action->setStatusTip(tr("Show all texts and scale"));
    connect(action, SIGNAL(triggered()), this, SLOT(showAllOverlays()));
    action->setCheckable(true);
    action->setChecked(false);
    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);
        
    action = new QAction(tr("Show Property Bo&xes"), this);
    action->setShortcut(tr("X"));
    action->setStatusTip(tr("Show the layer property boxes at the side of the main window"));
    connect(action, SIGNAL(triggered()), this, SLOT(togglePropertyBoxes()));
    action->setCheckable(true);
    action->setChecked(true);
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

    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);
}

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);
    }

    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;

//    menu->addSeparator();

    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
    };

    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 (unsigned int i = 0;
	 i < sizeof(backgroundTypes)/sizeof(backgroundTypes[0]); ++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, shortcutText, tipText, channelText;
            LayerFactory::LayerType type = backgroundTypes[i];
            bool mono = true;
            
            switch (type) {
                    
            case LayerFactory::Waveform:
                icon = il.load("waveform");
                mainText = tr("Add &Waveform");
                if (menuType == paneMenuType) {
                    shortcutText = tr("W");
                    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) {
                    shortcutText = tr("G");
                    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) {
                    shortcutText = tr("M");
                    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) {
                    shortcutText = tr("K");
                    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) {
                    shortcutText = tr("U");
                    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;
//            if (menuType == paneMenuType) {
                candidateModels = models;
//            } else {
//                candidateModels.push_back(0);
//            }
            
            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 (menuType == layerMenuType) {
//                        if (isDefault) isOnly = true;
//                        else continue;
//                    }

                    if (isOnly && (!plural /*|| menuType == layerMenuType*/)) {

//                        if (menuType == layerMenuType && type != LayerFactory::Waveform) {
//                            action = new QAction(mainText, this);
//                        } else {
                            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);
                        } else {
                            connect(action, SIGNAL(triggered()),
                                    this, SLOT(addLayer()));
                            connect(this, SIGNAL(canAddLayer(bool)),
                                    action, SLOT(setEnabled(bool)));
                            m_layerActions[action] = LayerConfiguration(type);
                        }
                        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);
                    }
		}
	    }
	}
    }

    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();

/*!!! These don't work correctly -- fix or omit
    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(canEditLayer(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
}

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();
    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 (unsigned int i = 0; i < transforms.size(); ++i) {
        QString name = transforms[i].name;
        if (seenNames.find(name) != seenNames.end()) {
            duplicateNames.insert(name);
        } else {
            seenNames.insert(name);
        }
    }

    for (unsigned int i = 0; i < transforms.size(); ++i) {
	
	QString name = transforms[i].name;
	if (name == "") name = transforms[i].identifier;

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

        if (makerMenus[type].find(maker) == makerMenus[type].end()) {
            std::cerr << "WARNING: MainWindow::setupMenus: Internal error: "
                      << "No maker menu for transform \""
                      << name.toStdString() << "\" (maker = \""
                      << maker.toStdString() << "\")" << std::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.toStdString() << "\": plugin name \"" << pluginName.toStdString() << "\"" << 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;

    QAction *action = new QAction(il.load("help"),
                                  tr("&Help Reference"), this); 
    action->setShortcut(tr("F1"));
    action->setStatusTip(tr("Open the Sonic Visualiser reference manual")); 
    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 Sonic Visualiser"));
    connect(action, SIGNAL(triggered()), this, SLOT(keyReference()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);
    
    action = new QAction(tr("Sonic Visualiser on the &Web"), this); 
    action->setStatusTip(tr("Open the Sonic Visualiser website")); 
    connect(action, SIGNAL(triggered()), this, SLOT(website()));
    menu->addAction(action);
    
    action = new QAction(tr("&About Sonic Visualiser"), this); 
    action->setStatusTip(tr("Show information about Sonic Visualiser")); 
    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) {
	QAction *action = new QAction(files[i], this);
	connect(action, SIGNAL(triggered()), this, SLOT(openRecentFile()));
        if (i == 0) {
            action->setShortcut(tr("Ctrl+R"));
            m_keyReference->registerShortcut
                (tr("Re-open"),
                 action->shortcut(),
                 tr("Re-open the current or most recently opened file"));
        }
	m_recentFilesMenu->addAction(action);
    }
}

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()) {
            std::cerr << "WARNING: MainWindow::setupRecentTransformsMenu: "
                      << "Unknown transform \"" << transforms[i].toStdString()
                      << "\" in recent transforms list" << std::endl;
            continue;
        }
        if (i == 0) {
            ti->second->setShortcut(tr("Ctrl+T"));
            m_keyReference->registerShortcut
                (tr("Repeat Transform"),
                 ti->second->shortcut(),
                 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

//    std::cerr << "MainWindow::setupExistingLayersMenu" << std::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()) {
//		std::cerr << "found duplicate layer " << layer << std::endl;
		continue;
	    }

//	    std::cerr << "found new layer " << layer << " (name = " 
//		      << layer->getLayerPresentationName().toStdString() << ")" << std::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_playAction = toolbar->addAction(il.load("playpause"),
                                      tr("Play / Pause"));
    m_playAction->setCheckable(true);
    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(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_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)));

    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_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_rwdStartAction);
    m_keyReference->registerShortcut(m_ffwdEndAction);

    menu->addAction(m_playAction);
    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_rwdStartAction);
    menu->addAction(m_ffwdEndAction);
    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();

    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);

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

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

    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()));
    group->addAction(action);
    m_keyReference->registerShortcut(action);
    m_toolActions[ViewManager::NavigateMode] = action;

    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;

    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;

    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;

    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;

    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;

    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);
    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));
    
    emit canChangeSolo(havePlayTarget);
    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;

    size_t ssr = getMainModel()->getSampleRate();
    size_t tsr = ssr;
    if (m_playSource) tsr = m_playSource->getTargetSampleRate();

    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, 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::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::exportAudio()
{
    if (!getMainModel()) return;

    QString 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) {

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

	    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,
                                        getMainModel()->getSampleRate(),
                                        getMainModel()->getChannelCount());
                subwriter.writeModel(getMainModel(), &subms);
		ok = subwriter.isOK();

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

    if (!multiple) {
        WavFileWriter writer(path,
                             getMainModel()->getSampleRate(),
                             getMainModel()->getChannelCount());
        writer.writeModel(getMainModel(), selectionToWrite);
	ok = writer.isOK();
	error = writer.getError();
    }

    if (ok) {
        if (!multiple) {
            m_recentFiles.addFile(path);
        }
    } else {
	QMessageBox::critical(this, tr("Failed to write file"), error);
    }
}

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

    if (!getMainModel()) {
	// shouldn't happen, as the menu action should have been disabled
	std::cerr << "WARNING: MainWindow::importLayer: No main model -- hence no default sample rate available" << std::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>Please load at least one audio file before importing annotation data"));
        }
    }
}

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 << "<?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);
            writer.write();
            if (!writer.isOK()) {
                error = writer.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);
    }
}

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->getImageSize();
    visible = pane->getImageSize(pane->getFirstVisibleFrame(),
                                 pane->getLastVisibleFrame());

    size_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->getImageSize(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 the 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->toNewImage();
    } else if (item == items[1]) {
        image = pane->toNewImage(pane->getFirstVisibleFrame(),
                                 pane->getLastVisibleFrame());
    } else if (haveSelection) {
        image = pane->toNewImage(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::newSession()
{
    if (!checkSaveModified()) return;

    closeSession();
    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::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_document;
    m_document = 0;
    m_viewManager->clearSelections();
    m_timeRulerLayer = 0; // document owned this

    m_sessionFile = "";
    setWindowTitle(tr("Sonic Visualiser"));

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

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

    QString orig = m_audioFile;
    if (orig == "") orig = ".";
    else orig = QFileInfo(orig).absoluteDir().canonicalPath();

    QString path = getOpenFileName(FileFinder::SessionFile);

    if (path.isEmpty()) return;

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

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 = open(path, AskUser);

    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>Please load at least one audio file before importing annotation data"));
    }
}

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 = open(text);

    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>Please load at least one audio file before importing annotation data"));
    }
}

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

    QString path = action->text();
    if (path == "") return;

    FileOpenStatus status = open(path);

    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>Please load at least one audio file before importing annotation data"));
    }
}

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 = open(*i, ReplaceCurrentPane);

        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));
        } else if (status == FileOpenWrongMode) {
            emit hideSplash();
            QMessageBox::critical(this, tr("Failed to open dropped URL"),
                                  tr("<b>Audio required</b><p>Please load at least one audio file before importing annotation data"));
        }
    }
}

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)
{
//    std::cerr << "MainWindow::closeEvent" << std::endl;

    if (m_openingAudioFile) {
//        std::cerr << "Busy - ignoring close event" << std::endl;
	e->ignore();
	return;
    }

    if (!m_abandoning && !checkSaveModified()) {
//        std::cerr << "Ignoring close event" << std::endl;
	e->ignore();
	return;
    }

    QSettings settings;
    settings.beginGroup("MainWindow");
    settings.setValue("size", size());
    settings.setValue("position", pos());
    settings.endGroup();

    delete m_keyReference;
    m_keyReference = 0;

    if (m_preferencesDialog &&
        m_preferencesDialog->isVisible()) {
        closeSession(); // otherwise we'll have to wait for prefs changes
        m_preferencesDialog->applicationClosing(false);
    }

    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);
            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;
}

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("Sonic Visualiser: %1")
		       .arg(QFileInfo(path).fileName()));
	m_sessionFile = path;
	CommandHistory::getInstance()->documentSaved();
	documentRestored();
        m_recentFiles.addFile(path);
    }
}

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

    if (name == "Background Mode" && m_viewManager) {
        if (m_viewManager->getGlobalDarkBackground()) {
            m_panLayer->setBaseColour
                (ColourDatabase::getInstance()->getColourIndex(tr("Bright Green")));
        } else {
            m_panLayer->setBaseColour
                (ColourDatabase::getInstance()->getColourIndex(tr("Green")));
        }      
    }     
}

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

    if (!m_playControlsSpacer) return;

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

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

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

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

    if (i == m_paneActions.end()) {
	std::cerr << "WARNING: MainWindow::addPane: unknown action "
		  << action->objectName().toStdString() << std::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(512);
    }

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

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

//	std::cerr << "adding time ruler layer " << m_timeRulerLayer << std::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) {
            std::cerr << "WARNING: Model " << (void *)suggestedModel
                      << " appears in pane action map, but is not reported "
                      << "by document as a valid transform source" << std::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);

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

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

    updateMenuStates();
}

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

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

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

	Layer *newLayer;

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

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

	} else {

            if (!i->second.sourceModel) {
                // e.g. time ruler
                newLayer = m_document->createMainModelLayer(type);
            } else {
                newLayer = m_document->createLayer(type);
                if (m_document->isKnownModel(i->second.sourceModel)) {
                    m_document->setChannel(newLayer, i->second.channel);
                    m_document->setModel(newLayer, i->second.sourceModel);
                } else {
                    std::cerr << "WARNING: MainWindow::addLayer: unknown model "
                              << i->second.sourceModel
                              << " (\""
                              << (i->second.sourceModel ? i->second.sourceModel->objectName().toStdString() : "")
                              << "\") in layer action map"
                              << std::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) {
	std::cerr << "WARNING: MainWindow::addLayer: no current pane" << std::endl;
	return;
    }

    Transform transform = TransformFactory::getInstance()->
        getDefaultTransformFor(transformId);

    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;
    }
    
    size_t startFrame = 0, duration = 0;
    size_t endFrame = 0;
    m_viewManager->getSelection().getExtents(startFrame, endFrame);
    if (endFrame > startFrame) duration = endFrame - startFrame;
    else startFrame = 0;

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

    if (!input.getModel()) return;

//    std::cerr << "MainWindow::addLayer: Input model is " << input.getModel() << " \"" << input.getModel()->objectName().toStdString() << "\"" << std::endl;

    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);
    }

    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(0, 200);

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

//    std::cerr << "speed = " << position << " percent = " << percent << " factor = " << factor << std::endl;

    bool something = (position != 100);

    int pc = lrintf(percent);

    if (!something) {
        contextHelpChanged(tr("Playback speed: Normal"));
    } else {
        contextHelpChanged(tr("Playback speed: %1%2%")
                           .arg(position > 100 ? "+" : "")
                           .arg(pc));
    }

    m_playSource->setTimeStretch(factor);

    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;
    for (int i = pane->getLayerCount(); i > 0; ) {
        --i;
        Layer *layer = pane->getLayer(i);
        if (LayerFactory::getInstance()->getLayerType(layer) ==
            LayerFactory::Waveform) {
            RangeSummarisableTimeValueModel *tvm = 
                dynamic_cast<RangeSummarisableTimeValueModel *>(layer->getModel());
            if (tvm) {
                m_panLayer->setModel(tvm);
                return;
            }
        }
    }
}

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

    bool haveSelection = false;
    size_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);
    }

    statusBar()->showMessage(m_myStatusMessage);
}

void
MainWindow::outputLevelsChanged(float left, float right)
{
    m_fader->setPeakLeft(left);
    m_fader->setPeakRight(right);
}

void
MainWindow::sampleRateMismatch(size_t requested, size_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::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) {
        connect(m_fader, SIGNAL(valueChanged(float)),
                m_playTarget, SLOT(setOutputGain(float)));
    }
}

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

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

    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 \"%1\" failed:<p>%2")
             .arg(transformName).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 \"%1\" failed.<p>No error information is available.")
             .arg(transformName),
             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 transformName, QString message)
{
    emit hideSplash();

    QMessageBox::warning
        (this,
         tr("Failed to calculate alignment"),
         tr("<b>Alignment calculation failed</b><p>Failed to calculate an audio alignment using transform \"%1\":<p>%2")
         .arg(transformName).arg(message),
         QMessageBox::Ok);
}

void
MainWindow::rightButtonMenuRequested(Pane *pane, QPoint position)
{
//    std::cerr << "MainWindow::rightButtonMenuRequested(" << pane << ", " << position.x() << ", " << position.y() << ")" << std::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);
    m_layerTreeDialog->setAttribute(Qt::WA_DeleteOnClose); // see below
    m_layerTreeDialog->show();
}

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

    m_preferencesDialog = new PreferencesDialog(this);

    // 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();
}

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

    if (w == m_fader) {
        contextHelpChanged(tr("Adjust the master playback level"));
    } else if (w == m_playSpeed) {
        contextHelpChanged(tr("Adjust the master playback speed"));
    }
}

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

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

void
MainWindow::help()
{
    openHelpUrl(tr("http://www.sonicvisualiser.org/doc/reference/1.4/en/"));
}

void
MainWindow::about()
{
    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

    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 += tr("<p><small>%1 : %2 configuration</small></p>")
        .arg(version)
        .arg(debug ? tr("Debug") : tr("Release"));

    aboutText += "<small>";

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

#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 v%1 &copy; Chris Cannam").arg(RUBBERBAND_VERSION);
#else // !RUBBERBAND_VERSION
    aboutText += tr("<br>With Rubber Band &copy; Chris Cannam");
#endif // RUBBERBAND_VERSION
#endif // HAVE_RUBBERBAND
#ifdef HAVE_VAMP
    aboutText += tr("<br>With Vamp plugin support (API v%1, host SDK v%2) &copy; Chris Cannam").arg(VAMP_API_VERSION).arg(VAMP_SDK_VERSION);
#endif // !HAVE_VAMP
    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 RAPTOR_VERSION
    aboutText += tr("<br>With Raptor RDF parser v%1 &copy; Dave Beckett and the University of Bristol").arg(RAPTOR_VERSION);
#else // !RAPTOR_VERSION
    aboutText += tr("<br>With Raptor RDF parser &copy; Dave Beckett and the University of Bristol");
#endif // RAPTOR_VERSION
#ifdef RASQAL_VERSION
    aboutText += tr("<br>With Rasqal RDF query engine v%1 &copy; Dave Beckett and the University of Bristol").arg(RASQAL_VERSION);
#else // !RASQAL_VERSION
    aboutText += tr("<br>With Rasqal RDF query engine &copy; Dave Beckett and the University of Bristol");
#endif // RASQAL_VERSION
#ifdef HAVE_REDLAND
#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
#endif // HAVE_REDLAND

#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").arg(LIBLO_VERSION);
#endif // LIBLO_VERSION

    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>";
#endif // HAVE_LIBLO

#ifndef BUILD_STATIC
    aboutText.replace(tr("With "), tr("Using "));
#endif

    aboutText += 
        "<p><small>Sonic Visualiser Copyright &copy; 2005 - 2008 Chris Cannam and "
        "Queen Mary, University of London.</small></p>"
        "<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>";
    
    QMessageBox::about(this, tr("About Sonic Visualiser"), aboutText);
}

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