annotate src/MainWindow.cpp @ 571:2cf4978eb724

Fix failure of "Form Note from Selection" to work correctly when an existing note spanned one end of the selection but did not reach the other. Also update subrepos to fix a deadlock

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

/*
    Tony
    An intonation analysis and annotation tool
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006-2012 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 "NetworkPermissionTester.h"
#include "Analyser.h"

#include "framework/Document.h"
#include "framework/VersionTester.h"

#include "view/Pane.h"
#include "view/PaneStack.h"
#include "data/model/WaveFileModel.h"
#include "data/model/NoteModel.h"
#include "layer/FlexiNoteLayer.h"
#include "data/model/NoteModel.h"
#include "view/ViewManager.h"
#include "base/Preferences.h"
#include "base/RecordDirectory.h"
#include "base/AudioLevel.h"
#include "layer/WaveformLayer.h"
#include "layer/TimeInstantLayer.h"
#include "layer/TimeValueLayer.h"
#include "layer/SpectrogramLayer.h"
#include "widgets/Fader.h"
#include "view/Overview.h"
#include "widgets/AudioDial.h"
#include "widgets/IconLoader.h"
#include "widgets/KeyReference.h"
#include "widgets/LevelPanToolButton.h"
#include "audio/AudioCallbackPlaySource.h"
#include "audio/AudioCallbackRecordTarget.h"
#include "audio/PlaySpeedRangeMapper.h"
#include "base/Profiler.h"
#include "base/UnitDatabase.h"
#include "layer/ColourDatabase.h"
#include "base/Selection.h"

#include "rdf/RDFImporter.h"
#include "data/fileio/DataFileReaderFactory.h"
#include "data/fileio/CSVFormat.h"
#include "data/fileio/CSVFileWriter.h"
#include "data/fileio/MIDIFileWriter.h"
#include "rdf/RDFExporter.h"

#include "widgets/RangeInputDialog.h"
#include "widgets/ActivityLog.h"

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

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

#include <QApplication>
#include <QMessageBox>
#include <QGridLayout>
#include <QLabel>
#include <QMenuBar>
#include <QToolBar>
#include <QToolButton>
#include <QInputDialog>
#include <QStatusBar>
#include <QFileInfo>
#include <QDir>
#include <QProcess>
#include <QPushButton>
#include <QSettings>
#include <QScrollArea>
#include <QPainter>
#include <QWidgetAction>

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

using std::vector;


MainWindow::MainWindow(SoundOptions options, bool withSonification, bool withSpectrogram) :
    MainWindowBase(options),
    m_overview(0),
    m_mainMenusCreated(false),
    m_playbackMenu(0),
    m_recentFilesMenu(0), 
    m_rightButtonMenu(0),
    m_rightButtonPlaybackMenu(0),
    m_deleteSelectedAction(0),
    m_ffwdAction(0),
    m_rwdAction(0),
    m_intelligentActionOn(true), //GF: !!! temporary
    m_activityLog(new ActivityLog()),
    m_keyReference(new KeyReference()),
    m_selectionAnchor(0),
    m_withSonification(withSonification),
    m_withSpectrogram(withSpectrogram)
{
    setWindowTitle(QApplication::applicationName());

#ifdef Q_OS_MAC
#if (QT_VERSION >= QT_VERSION_CHECK(5, 2, 0))
    setUnifiedTitleAndToolBarOnMac(true);
#endif
#endif

    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->addColour(QColor(180, 180, 180), tr("Grey"));
    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);

    Preferences::getInstance()->setResampleOnLoad(true);
    Preferences::getInstance()->setFixedSampleRate(44100);
    Preferences::getInstance()->setSpectrogramSmoothing
        (Preferences::SpectrogramInterpolated);
    Preferences::getInstance()->setNormaliseAudio(true);

    QSettings settings;

    settings.beginGroup("MainWindow");
    settings.setValue("showstatusbar", false);
    settings.endGroup();

    settings.beginGroup("Transformer");
    settings.setValue("use-flexi-note-model", true);
    settings.endGroup();

    settings.beginGroup("LayerDefaults");
    settings.setValue("waveform",
                      QString("<layer scale=\"%1\" channelMode=\"%2\"/>")
                      .arg(int(WaveformLayer::LinearScale))
                      .arg(int(WaveformLayer::MixChannels)));
    settings.endGroup();

    m_viewManager->setAlignMode(false);
    m_viewManager->setPlaySoloMode(false);
    m_viewManager->setToolMode(ViewManager::NavigateMode);
    m_viewManager->setZoomWheelsEnabled(false);
    m_viewManager->setIlluminateLocalFeatures(true);
    m_viewManager->setShowWorkTitle(false);
    m_viewManager->setShowCentreLine(false);
    m_viewManager->setShowDuration(false);
    m_viewManager->setOverlayMode(ViewManager::GlobalOverlays);

    connect(m_viewManager, SIGNAL(selectionChangedByUser()),
	    this, SLOT(selectionChangedByUser()));

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

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

    // We have a pane stack: it comes with the territory. However, we
    // have a fixed and known number of panes in it -- it isn't
    // variable
    m_paneStack->setLayoutStyle(PaneStack::NoPropertyStacks);
    m_paneStack->setShowPaneAccessories(false);
    connect(m_paneStack, SIGNAL(doubleClickSelectInvoked(sv_frame_t)),
            this, SLOT(doubleClickSelectInvoked(sv_frame_t)));
    scroll->setWidget(m_paneStack);

    m_overview = new Overview(frame);
    m_overview->setPlaybackFollow(PlaybackScrollPage);
    m_overview->setViewManager(m_viewManager);
    m_overview->setFixedHeight(60);
#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_panLayer->setGain(0.5);
    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("Blue")));
    }        

    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->setMeterColor(Qt::darkBlue);
    m_playSpeed->setMinimum(0);
    m_playSpeed->setMaximum(120);
    m_playSpeed->setValue(60);
    m_playSpeed->setFixedWidth(24);
    m_playSpeed->setFixedHeight(24);
    m_playSpeed->setNotchesVisible(true);
    m_playSpeed->setPageStep(10);
    m_playSpeed->setObjectName(tr("Playback Speed"));
    m_playSpeed->setDefaultValue(60);
    m_playSpeed->setRangeMapper(new PlaySpeedRangeMapper);
    m_playSpeed->setShowToolTip(true);
    connect(m_playSpeed, SIGNAL(valueChanged(int)),
        this, SLOT(playSpeedChanged(int)));
    connect(m_playSpeed, SIGNAL(mouseEntered()), this, SLOT(mouseEnteredWidget()));
    connect(m_playSpeed, SIGNAL(mouseLeft()), this, SLOT(mouseLeftWidget()));

    m_audioLPW = new LevelPanToolButton(frame);
    m_audioLPW->setIncludeMute(false);
    m_audioLPW->setObjectName(tr("Audio Track Level and Pan"));
    connect(m_audioLPW, SIGNAL(levelChanged(float)), this, SLOT(audioGainChanged(float)));
    connect(m_audioLPW, SIGNAL(panChanged(float)), this, SLOT(audioPanChanged(float)));

    if (m_withSonification) {

        m_pitchLPW = new LevelPanToolButton(frame);
        m_pitchLPW->setIncludeMute(false);
        m_pitchLPW->setObjectName(tr("Pitch Track Level and Pan"));
        connect(m_pitchLPW, SIGNAL(levelChanged(float)), this, SLOT(pitchGainChanged(float)));
        connect(m_pitchLPW, SIGNAL(panChanged(float)), this, SLOT(pitchPanChanged(float)));

        m_notesLPW = new LevelPanToolButton(frame);
        m_notesLPW->setIncludeMute(false);
        m_notesLPW->setObjectName(tr("Note Track Level and Pan"));
        connect(m_notesLPW, SIGNAL(levelChanged(float)), this, SLOT(notesGainChanged(float)));
        connect(m_notesLPW, SIGNAL(panChanged(float)), this, SLOT(notesPanChanged(float)));
    }

    layout->setSpacing(4);
    layout->addWidget(m_overview, 0, 1);
    layout->addWidget(scroll, 1, 1);

    layout->setColumnStretch(1, 10);

    frame->setLayout(layout);

    m_analyser = new Analyser();
    connect(m_analyser, SIGNAL(layersChanged()),
            this, SLOT(updateLayerStatuses()));
    connect(m_analyser, SIGNAL(layersChanged()),
            this, SLOT(updateMenuStates()));

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

    statusBar();

    finaliseMenus();

    connect(m_viewManager, SIGNAL(activity(QString)),
            m_activityLog, SLOT(activityHappened(QString)));
    connect(m_playSource, SIGNAL(activity(QString)),
            m_activityLog, SLOT(activityHappened(QString)));
    connect(CommandHistory::getInstance(), SIGNAL(activity(QString)),
            m_activityLog, SLOT(activityHappened(QString)));
    connect(this, SIGNAL(activity(QString)),
            m_activityLog, SLOT(activityHappened(QString)));
    connect(this, SIGNAL(replacedDocument()), this, SLOT(documentReplaced()));
    connect(this, SIGNAL(sessionLoaded()), this, SLOT(analyseNewMainModel()));
    connect(this, SIGNAL(audioFileLoaded()), this, SLOT(analyseNewMainModel()));
    m_activityLog->hide();

    setAudioRecordMode(RecordReplaceSession);
    
    newSession();

    settings.beginGroup("MainWindow");
    settings.setValue("zoom-default", 512);
    settings.endGroup();
    zoomDefault();

    NetworkPermissionTester tester;
    bool networkPermission = tester.havePermission();
    if (networkPermission) {
        m_versionTester = new VersionTester
            ("sonicvisualiser.org", "latest-tony-version.txt", TONY_VERSION);
        connect(m_versionTester, SIGNAL(newerVersionAvailable(QString)),
                this, SLOT(newerVersionAvailable(QString)));
    } else {
        m_versionTester = 0;
    }
}

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

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

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

        m_rightButtonMenu = new QMenu();
    }

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

    setupFileMenu();
    setupEditMenu();
    setupViewMenu();
    setupAnalysisMenu();

    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;
    QAction *action;

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

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

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

    menu->addSeparator();

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

    action = new QAction(tr("Save Session to Audio File &Path"), this);
    action->setShortcut(tr("Ctrl+Alt+S"));
    action->setStatusTip(tr("Save the current session into a %1 session file with the same filename as the audio but a .ton extension.").arg(QApplication::applicationName()));
    connect(action, SIGNAL(triggered()), this, SLOT(saveSessionInAudioPath()));
    connect(this, SIGNAL(canSaveAs(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

    menu->addSeparator();

    action = new QAction(tr("I&mport Pitch Track Data..."), this);
    action->setStatusTip(tr("Import pitch-track data from a CSV, RDF, or layer XML file"));
    connect(action, SIGNAL(triggered()), this, SLOT(importPitchLayer()));
    connect(this, SIGNAL(canImportLayer(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

    action = new QAction(tr("E&xport Pitch Track Data..."), this);
    action->setStatusTip(tr("Export pitch-track data to a CSV, RDF, or layer XML file"));
    connect(action, SIGNAL(triggered()), this, SLOT(exportPitchLayer()));
    connect(this, SIGNAL(canExportPitchTrack(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

    action = new QAction(tr("&Export Note Data..."), this);
    action->setStatusTip(tr("Export note data to a CSV, RDF, layer XML, or MIDI file"));
    connect(action, SIGNAL(triggered()), this, SLOT(exportNoteLayer()));
    connect(this, SIGNAL(canExportNotes(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

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

    menu->addSeparator();

    action = new QAction(il.load("exit"), tr("&Quit"), this);
    action->setShortcut(tr("Ctrl+Q"));
    action->setStatusTip(tr("Exit %1").arg(QApplication::applicationName()));
    connect(action, SIGNAL(triggered()), 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);
    menu->addSeparator();

    m_keyReference->setCategory
        (tr("Selection Strip Mouse Actions"));
    m_keyReference->registerShortcut
        (tr("Jump"), tr("Left"), 
         tr("Click left button to move the playback position to a time"));
    m_keyReference->registerShortcut
        (tr("Select"), tr("Left"), 
         tr("Click left button and drag to select a region of time"));
    m_keyReference->registerShortcut
        (tr("Select Note Duration"), tr("Double-Click Left"), 
         tr("Double-click left button to select the region of time corresponding to a note"));

    QToolBar *toolbar = addToolBar(tr("Tools Toolbar"));
    
    CommandHistory::getInstance()->registerToolbar(toolbar);

    QActionGroup *group = new QActionGroup(this);

    IconLoader il;

    m_keyReference->setCategory(tr("Tool Selection"));
    QAction *action = toolbar->addAction(il.load("navigate"),
                                         tr("Navigate"));
    action->setCheckable(true);
    action->setChecked(true);
    action->setShortcut(tr("1"));
    action->setStatusTip(tr("Navigate"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolNavigateSelected()));
    connect(this, SIGNAL(replacedDocument()), action, SLOT(trigger()));
    group->addAction(action);
    menu->addAction(action);
    m_keyReference->registerShortcut(action);

    m_keyReference->setCategory
        (tr("Navigate Tool Mouse Actions"));
    m_keyReference->registerShortcut
        (tr("Navigate"), tr("Left"), 
         tr("Click left button and drag to move around"));
    m_keyReference->registerShortcut
        (tr("Re-Analyse Area"), tr("Shift+Left"), 
         tr("Shift-click left button and drag to define a specific pitch and time range to re-analyse"));
    m_keyReference->registerShortcut
        (tr("Edit"), tr("Double-Click Left"), 
         tr("Double-click left button on an item to edit it"));

    m_keyReference->setCategory(tr("Tool Selection"));
    action = toolbar->addAction(il.load("move"),
				tr("Edit"));
    action->setCheckable(true);
    action->setShortcut(tr("2"));
    action->setStatusTip(tr("Edit with Note Intelligence"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolEditSelected()));
    group->addAction(action);
    menu->addAction(action);
    m_keyReference->registerShortcut(action);

    m_keyReference->setCategory
        (tr("Note Edit Tool Mouse Actions"));
    m_keyReference->registerShortcut
        (tr("Adjust Pitch"), tr("Left"), 
        tr("Click left button on the main part of a note and drag to move it up or down"));
    m_keyReference->registerShortcut
        (tr("Split"), tr("Left"), 
        tr("Click left button on the bottom edge of a note to split it at the click point"));
    m_keyReference->registerShortcut
        (tr("Resize"), tr("Left"), 
        tr("Click left button on the left or right edge of a note and drag to change the time or duration of the note"));
    m_keyReference->registerShortcut
        (tr("Erase"), tr("Shift+Left"), 
        tr("Shift-click left button on a note to remove it"));


/* Remove for now...

    m_keyReference->setCategory(tr("Tool Selection"));
    action = toolbar->addAction(il.load("notes"),
				tr("Free Edit"));
    action->setCheckable(true);
    action->setShortcut(tr("3"));
    action->setStatusTip(tr("Free Edit"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolFreeEditSelected()));
    group->addAction(action);
    m_keyReference->registerShortcut(action);
*/

    menu->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("C&lear Selection"), this);
    action->setShortcuts(QList<QKeySequence>()
                         << QKeySequence(tr("Esc"))
                         << QKeySequence(tr("Ctrl+Esc")));
    action->setStatusTip(tr("Clear the selection and abandon any pending pitch choices in it"));
    connect(action, SIGNAL(triggered()), this, SLOT(abandonSelection()));
    connect(this, SIGNAL(canClearSelection(bool)), action, SLOT(setEnabled(bool)));
    m_keyReference->registerShortcut(action);
    m_keyReference->registerAlternativeShortcut(action, QKeySequence(tr("Ctrl+Esc")));
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    menu->addSeparator();
    m_rightButtonMenu->addSeparator();
    
    m_keyReference->setCategory(tr("Pitch Track"));
    
    action = new QAction(tr("Choose Higher Pitch"), this);
    action->setShortcut(tr("Ctrl+Up"));
    action->setStatusTip(tr("Move pitches up an octave, or to the next higher pitch candidate"));
    m_keyReference->registerShortcut(action);
    connect(action, SIGNAL(triggered()), this, SLOT(switchPitchUp()));
    connect(this, SIGNAL(canClearSelection(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);
    
    action = new QAction(tr("Choose Lower Pitch"), this);
    action->setShortcut(tr("Ctrl+Down"));
    action->setStatusTip(tr("Move pitches down an octave, or to the next lower pitch candidate"));
    m_keyReference->registerShortcut(action);
    connect(action, SIGNAL(triggered()), this, SLOT(switchPitchDown()));
    connect(this, SIGNAL(canClearSelection(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    m_showCandidatesAction = new QAction(tr("Show Pitch Candidates"), this);
    m_showCandidatesAction->setShortcut(tr("Ctrl+Return"));
    m_showCandidatesAction->setStatusTip(tr("Toggle the display of alternative pitch candidates for the selected region"));
    m_keyReference->registerShortcut(m_showCandidatesAction);
    connect(m_showCandidatesAction, SIGNAL(triggered()), this, SLOT(togglePitchCandidates()));
    connect(this, SIGNAL(canClearSelection(bool)), m_showCandidatesAction, SLOT(setEnabled(bool)));
    menu->addAction(m_showCandidatesAction);
    m_rightButtonMenu->addAction(m_showCandidatesAction);
    
    action = new QAction(tr("Remove Pitches"), this);
    action->setShortcut(tr("Ctrl+Backspace"));
    action->setStatusTip(tr("Remove all pitch estimates within the selected region, making it unvoiced"));
    m_keyReference->registerShortcut(action);
    connect(action, SIGNAL(triggered()), this, SLOT(clearPitches()));
    connect(this, SIGNAL(canClearSelection(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    menu->addSeparator();
    m_rightButtonMenu->addSeparator();
    
    m_keyReference->setCategory(tr("Note Track"));

    action = new QAction(tr("Split Note"), this);
    action->setShortcut(tr("/"));
    action->setStatusTip(tr("Split the note at the current playback position into two"));
    m_keyReference->registerShortcut(action);
    connect(action, SIGNAL(triggered()), this, SLOT(splitNote()));
    connect(this, SIGNAL(canExportNotes(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    action = new QAction(tr("Merge Notes"), this);
    action->setShortcut(tr("\\"));
    action->setStatusTip(tr("Merge all notes within the selected region into a single note"));
    m_keyReference->registerShortcut(action);
    connect(action, SIGNAL(triggered()), this, SLOT(mergeNotes()));
    connect(this, SIGNAL(canSnapNotes(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    action = new QAction(tr("Delete Notes"), this);
    action->setShortcut(tr("Backspace"));
    action->setStatusTip(tr("Delete all notes within the selected region"));
    m_keyReference->registerShortcut(action);
    connect(action, SIGNAL(triggered()), this, SLOT(deleteNotes()));
    connect(this, SIGNAL(canSnapNotes(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);
    
    action = new QAction(tr("Form Note from Selection"), this);
    action->setShortcut(tr("="));
    action->setStatusTip(tr("Form a note spanning the selected region, splitting any existing notes at its boundaries"));
    m_keyReference->registerShortcut(action);
    connect(action, SIGNAL(triggered()), this, SLOT(formNoteFromSelection()));
    connect(this, SIGNAL(canSnapNotes(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
    m_rightButtonMenu->addAction(action);

    action = new QAction(tr("Snap Notes to Pitch Track"), this);
    action->setStatusTip(tr("Set notes within the selected region to the median frequency of their underlying pitches, or remove them if there are no underlying pitches"));
    // m_keyReference->registerShortcut(action);
    connect(action, SIGNAL(triggered()), this, SLOT(snapNotesToPitches()));
    connect(this, SIGNAL(canSnapNotes(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
    m_rightButtonMenu->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("Peek &Left"), this);
    action->setShortcut(tr("Alt+Left"));
    action->setStatusTip(tr("Scroll the current pane to the left without changing the play position"));
    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("Peek &Right"), this);
    action->setShortcut(tr("Alt+Right"));
    action->setStatusTip(tr("Scroll the current pane to the right without changing the play position"));
    connect(action, SIGNAL(triggered()), this, SLOT(scrollRight()));
    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();
    
    action = new QAction(tr("Set Displayed Fre&quency Range..."), this);
    action->setStatusTip(tr("Set the minimum and maximum frequencies in the visible display"));
    connect(action, SIGNAL(triggered()), this, SLOT(editDisplayExtents()));
    menu->addAction(action);
}

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

    IconLoader il;

    QAction *action = 0;

    QMenu *menu = menuBar()->addMenu(tr("&Analysis"));
    menu->setTearOffEnabled(true);

    m_autoAnalyse = new QAction(tr("Auto-Analyse &New Audio"), this);
    m_autoAnalyse->setStatusTip(tr("Automatically trigger analysis upon opening of a new audio file."));
    m_autoAnalyse->setCheckable(true);
    connect(m_autoAnalyse, SIGNAL(triggered()), this, SLOT(autoAnalysisToggled()));
    menu->addAction(m_autoAnalyse);

    action = new QAction(tr("&Analyse Now!"), this);
    action->setStatusTip(tr("Trigger analysis of pitches and notes. (This will delete all existing pitches and notes.)"));
    connect(action, SIGNAL(triggered()), this, SLOT(analyseNow()));
    menu->addAction(action);
    m_keyReference->registerShortcut(action);

    menu->addSeparator();

    m_precise = new QAction(tr("&Unbiased Timing (slow)"), this);
    m_precise->setStatusTip(tr("Use a symmetric window in YIN to remove frequency-dependent timing bias. (This is slow!)"));
    m_precise->setCheckable(true);
    connect(m_precise, SIGNAL(triggered()), this, SLOT(precisionAnalysisToggled()));
    menu->addAction(m_precise);

    m_lowamp = new QAction(tr("&Penalise Soft Pitches"), this);
    m_lowamp->setStatusTip(tr("Reduce the likelihood of detecting a pitch when the signal has low amplitude."));
    m_lowamp->setCheckable(true);
    connect(m_lowamp, SIGNAL(triggered()), this, SLOT(lowampAnalysisToggled()));
    menu->addAction(m_lowamp);

    m_onset = new QAction(tr("&High Onset Sensitivity"), this);
    m_onset->setStatusTip(tr("Increase likelihood of separating notes, especially consecutive notes at the same pitch."));
    m_onset->setCheckable(true);
    connect(m_onset, SIGNAL(triggered()), this, SLOT(onsetAnalysisToggled()));
    menu->addAction(m_onset);

    m_prune = new QAction(tr("&Drop Short Notes"), this);
    m_prune->setStatusTip(tr("Duration-based pruning: automatic note estimator will not output notes of less than 100ms duration."));
    m_prune->setCheckable(true);
    connect(m_prune, SIGNAL(triggered()), this, SLOT(pruneAnalysisToggled()));
    menu->addAction(m_prune);

    menu->addSeparator();

    action = new QAction(tr("Reset Options to Defaults"), this);
    action->setStatusTip(tr("Reset all of the Analyse menu options to their default settings."));
    connect(action, SIGNAL(triggered()), this, SLOT(resetAnalyseOptions()));
    menu->addAction(action);

    updateAnalyseStates();
}

void
MainWindow::resetAnalyseOptions()
{
    //!!! oh no, we need to update the menu states as well...
    QSettings settings;
    settings.beginGroup("Analyser");
    settings.setValue("auto-analysis", true);
    settings.setValue("precision-analysis", false);
    settings.setValue("lowamp-analysis", true);
    settings.setValue("onset-analysis", true);
    settings.setValue("prune-analysis", true);
    settings.endGroup();
    updateAnalyseStates();
}

void
MainWindow::updateAnalyseStates()
{
    QSettings settings;
    settings.beginGroup("Analyser");
    bool autoAnalyse = settings.value("auto-analysis", true).toBool();
    bool precise = settings.value("precision-analysis", false).toBool();
    bool lowamp = settings.value("lowamp-analysis", true).toBool();
    bool onset = settings.value("onset-analysis", true).toBool();
    bool prune = settings.value("prune-analysis", true).toBool();
    settings.endGroup();

    m_autoAnalyse->setChecked(autoAnalyse);
    m_precise->setChecked(precise);
    m_lowamp->setChecked(lowamp);
    m_onset->setChecked(onset);
    m_prune->setChecked(prune);
}

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

    bool set = a->isChecked();

    QSettings settings;
    settings.beginGroup("Analyser");
    settings.setValue("auto-analysis", set);
    settings.endGroup();
}

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

    bool set = a->isChecked();

    QSettings settings;
    settings.beginGroup("Analyser");
    settings.setValue("precision-analysis", set);
    settings.endGroup();

    // don't run analyseNow() automatically -- it's a destructive operation
}

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

    bool set = a->isChecked();

    QSettings settings;
    settings.beginGroup("Analyser");
    settings.setValue("lowamp-analysis", set);
    settings.endGroup();

    // don't run analyseNow() automatically -- it's a destructive operation
}

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

    bool set = a->isChecked();

    QSettings settings;
    settings.beginGroup("Analyser");
    settings.setValue("onset-analysis", set);
    settings.endGroup();

    // don't run analyseNow() automatically -- it's a destructive operation
}

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

    bool set = a->isChecked();

    QSettings settings;
    settings.beginGroup("Analyser");
    settings.setValue("prune-analysis", set);
    settings.endGroup();

    // don't run analyseNow() automatically -- it's a destructive operation
}

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

    IconLoader il;

    QString name = QApplication::applicationName();
    QAction *action;

    action = new QAction(tr("&Key and Mouse Reference"), this);
    action->setShortcut(tr("F2"));
    action->setStatusTip(tr("Open a window showing the keystrokes you can use in %1").arg(name));
    connect(action, SIGNAL(triggered()), this, SLOT(keyReference()));
    m_keyReference->registerShortcut(action);
    menu->addAction(action);

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

    
    action = new QAction(tr("%1 on the &Web").arg(name), this); 
    action->setStatusTip(tr("Open the %1 website").arg(name)); 
    connect(action, SIGNAL(triggered()), this, SLOT(website()));
    menu->addAction(action);
    
    action = new QAction(tr("&About %1").arg(name), this); 
    action->setStatusTip(tr("Show information about %1").arg(name)); 
    connect(action, SIGNAL(triggered()), this, SLOT(about()));
    menu->addAction(action);
}

void
MainWindow::setupRecentFilesMenu()
{
    m_recentFilesMenu->clear();
    vector<QString> files = m_recentFiles.getRecent();
    for (size_t i = 0; i < files.size(); ++i) {
        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().toString(),
                 tr("Re-open the current or most recently opened file"));
        }
        m_recentFilesMenu->addAction(action);
    }
}

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"));

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

    QAction *m_rwdAction = toolbar->addAction(il.load("rewind"),
                                              tr("Rewind"));
    m_rwdAction->setShortcut(tr("Left"));
    m_rwdAction->setStatusTip(tr("Rewind to the previous one-second boundary"));
    connect(m_rwdAction, SIGNAL(triggered()), this, SLOT(rewind()));
    connect(this, SIGNAL(canRewind(bool)), m_rwdAction, SLOT(setEnabled(bool)));

    setDefaultFfwdRwdStep(RealTime(1, 0));

    QAction *playAction = toolbar->addAction(il.load("playpause"),
                                             tr("Play / Pause"));
    playAction->setCheckable(true);
    playAction->setShortcut(tr("Space"));
    playAction->setStatusTip(tr("Start or stop playback from the current position"));
    connect(playAction, SIGNAL(triggered()), this, SLOT(play()));
    connect(m_playSource, SIGNAL(playStatusChanged(bool)),
        playAction, SLOT(setChecked(bool)));
    connect(this, SIGNAL(canPlay(bool)), playAction, SLOT(setEnabled(bool)));

    m_ffwdAction = toolbar->addAction(il.load("ffwd"),
                                              tr("Fast Forward"));
    m_ffwdAction->setShortcut(tr("Right"));
    m_ffwdAction->setStatusTip(tr("Fast-forward to the next one-second boundary"));
    connect(m_ffwdAction, SIGNAL(triggered()), this, SLOT(ffwd()));
    connect(this, SIGNAL(canFfwd(bool)), m_ffwdAction, SLOT(setEnabled(bool)));

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

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

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

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

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

    QAction *oneLeftAction = new QAction(tr("&One Note Left"), this);
    oneLeftAction->setShortcut(tr("Ctrl+Left"));
    oneLeftAction->setStatusTip(tr("Move cursor to the preceding note (or silence) onset."));
    connect(oneLeftAction, SIGNAL(triggered()), this, SLOT(moveOneNoteLeft()));
    connect(this, SIGNAL(canScroll(bool)), oneLeftAction, SLOT(setEnabled(bool)));
    
    QAction *oneRightAction = new QAction(tr("O&ne Note Right"), this);
    oneRightAction->setShortcut(tr("Ctrl+Right"));
    oneRightAction->setStatusTip(tr("Move cursor to the succeeding note (or silence)."));
    connect(oneRightAction, SIGNAL(triggered()), this, SLOT(moveOneNoteRight()));
    connect(this, SIGNAL(canScroll(bool)), oneRightAction, SLOT(setEnabled(bool)));

    QAction *selectOneLeftAction = new QAction(tr("&Select One Note Left"), this);
    selectOneLeftAction->setShortcut(tr("Ctrl+Shift+Left"));
    selectOneLeftAction->setStatusTip(tr("Select to the preceding note (or silence) onset."));
    connect(selectOneLeftAction, SIGNAL(triggered()), this, SLOT(selectOneNoteLeft()));
    connect(this, SIGNAL(canScroll(bool)), selectOneLeftAction, SLOT(setEnabled(bool)));
    
    QAction *selectOneRightAction = new QAction(tr("S&elect One Note Right"), this);
    selectOneRightAction->setShortcut(tr("Ctrl+Shift+Right"));
    selectOneRightAction->setStatusTip(tr("Select to the succeeding note (or silence)."));
    connect(selectOneRightAction, SIGNAL(triggered()), this, SLOT(selectOneNoteRight()));
    connect(this, SIGNAL(canScroll(bool)), selectOneRightAction, SLOT(setEnabled(bool)));

    m_keyReference->registerShortcut(psAction);
    m_keyReference->registerShortcut(plAction);
    m_keyReference->registerShortcut(playAction);
    m_keyReference->registerShortcut(recordAction);
    m_keyReference->registerShortcut(m_rwdAction);
    m_keyReference->registerShortcut(m_ffwdAction);
    m_keyReference->registerShortcut(rwdStartAction);
    m_keyReference->registerShortcut(ffwdEndAction);
    m_keyReference->registerShortcut(recordAction);
    m_keyReference->registerShortcut(oneLeftAction);
    m_keyReference->registerShortcut(oneRightAction);
    m_keyReference->registerShortcut(selectOneLeftAction);
    m_keyReference->registerShortcut(selectOneRightAction);

    menu->addAction(playAction);
    menu->addAction(psAction);
    menu->addAction(plAction);
    menu->addSeparator();
    menu->addAction(m_rwdAction);
    menu->addAction(m_ffwdAction);
    menu->addSeparator();
    menu->addAction(rwdStartAction);
    menu->addAction(ffwdEndAction);
    menu->addSeparator();
    menu->addAction(oneLeftAction);
    menu->addAction(oneRightAction);
    menu->addAction(selectOneLeftAction);
    menu->addAction(selectOneRightAction);
    menu->addSeparator();
    menu->addAction(recordAction);
    menu->addSeparator();

    m_rightButtonPlaybackMenu->addAction(playAction);
    m_rightButtonPlaybackMenu->addAction(psAction);
    m_rightButtonPlaybackMenu->addAction(plAction);
    m_rightButtonPlaybackMenu->addSeparator();
    m_rightButtonPlaybackMenu->addAction(m_rwdAction);
    m_rightButtonPlaybackMenu->addAction(m_ffwdAction);
    m_rightButtonPlaybackMenu->addSeparator();
    m_rightButtonPlaybackMenu->addAction(rwdStartAction);
    m_rightButtonPlaybackMenu->addAction(ffwdEndAction);
    m_rightButtonPlaybackMenu->addSeparator();
    m_rightButtonPlaybackMenu->addAction(oneLeftAction);
    m_rightButtonPlaybackMenu->addAction(oneRightAction);
    m_rightButtonPlaybackMenu->addAction(selectOneLeftAction);
    m_rightButtonPlaybackMenu->addAction(selectOneRightAction);
    m_rightButtonPlaybackMenu->addSeparator();
    m_rightButtonPlaybackMenu->addAction(recordAction);
    m_rightButtonPlaybackMenu->addSeparator();

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

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

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

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

    toolbar = new QToolBar(tr("Playback Controls"));
    addToolBar(Qt::BottomToolBarArea, toolbar);

    toolbar->addWidget(m_playSpeed);
    toolbar->addWidget(m_fader);

    toolbar = addToolBar(tr("Show and Play"));
    addToolBar(Qt::BottomToolBarArea, toolbar);

    m_showAudio = toolbar->addAction(il.load("waveform"), tr("Show Audio"));
    m_showAudio->setCheckable(true);
    connect(m_showAudio, SIGNAL(triggered()), this, SLOT(showAudioToggled()));
    connect(this, SIGNAL(canPlay(bool)), m_showAudio, SLOT(setEnabled(bool)));

    m_playAudio = toolbar->addAction(il.load("speaker"), tr("Play Audio"));
    m_playAudio->setCheckable(true);
    connect(m_playAudio, SIGNAL(triggered()), this, SLOT(playAudioToggled()));
    connect(this, SIGNAL(canPlayWaveform(bool)), m_playAudio, SLOT(setEnabled(bool)));

    int lpwSize, bigLpwSize;
#ifdef Q_OS_MAC
    lpwSize = m_viewManager->scalePixelSize(32); // Mac toolbars are fatter
    bigLpwSize = int(lpwSize * 2.2);
#else
    lpwSize = m_viewManager->scalePixelSize(26);
    bigLpwSize = int(lpwSize * 2.8);
#endif
    
    m_audioLPW->setImageSize(lpwSize);
    m_audioLPW->setBigImageSize(bigLpwSize);
    toolbar->addWidget(m_audioLPW);

    // Pitch (f0)
    QLabel *spacer = new QLabel; // blank
    spacer->setFixedWidth(m_viewManager->scalePixelSize(30));
    toolbar->addWidget(spacer);

    m_showPitch = toolbar->addAction(il.load("values"), tr("Show Pitch Track"));
    m_showPitch->setCheckable(true);
    connect(m_showPitch, SIGNAL(triggered()), this, SLOT(showPitchToggled()));
    connect(this, SIGNAL(canPlay(bool)), m_showPitch, SLOT(setEnabled(bool)));

    if (m_withSonification) {
        m_playPitch = toolbar->addAction(il.load("speaker"), tr("Play Pitch Track"));
        m_playPitch->setCheckable(true);
        connect(m_playPitch, SIGNAL(triggered()), this, SLOT(playPitchToggled()));
        connect(this, SIGNAL(canPlayPitch(bool)), m_playPitch, SLOT(setEnabled(bool)));

        m_pitchLPW->setImageSize(lpwSize);
        m_pitchLPW->setBigImageSize(bigLpwSize);
        toolbar->addWidget(m_pitchLPW);
    } else {
        m_playPitch = 0;
    }

    // Notes
    spacer = new QLabel;
    spacer->setFixedWidth(m_viewManager->scalePixelSize(30));
    toolbar->addWidget(spacer);

    m_showNotes = toolbar->addAction(il.load("notes"), tr("Show Notes"));
    m_showNotes->setCheckable(true);
    connect(m_showNotes, SIGNAL(triggered()), this, SLOT(showNotesToggled()));
    connect(this, SIGNAL(canPlay(bool)), m_showNotes, SLOT(setEnabled(bool)));

    if (m_withSonification) {
        m_playNotes = toolbar->addAction(il.load("speaker"), tr("Play Notes"));
        m_playNotes->setCheckable(true);
        connect(m_playNotes, SIGNAL(triggered()), this, SLOT(playNotesToggled()));
        connect(this, SIGNAL(canPlayNotes(bool)), m_playNotes, SLOT(setEnabled(bool)));

        m_notesLPW->setImageSize(lpwSize);
        m_notesLPW->setBigImageSize(bigLpwSize);
        toolbar->addWidget(m_notesLPW);
    } else {
        m_playNotes = 0;
    }

    // Spectrogram
    spacer = new QLabel;
    spacer->setFixedWidth(m_viewManager->scalePixelSize(30));
    toolbar->addWidget(spacer);

    if (!m_withSpectrogram)
    {
        m_showSpect = new QAction(tr("Show Spectrogram"), this);
    } else {
        m_showSpect = toolbar->addAction(il.load("spectrogram"), tr("Show Spectrogram"));
    }
    m_showSpect->setCheckable(true);
    connect(m_showSpect, SIGNAL(triggered()), this, SLOT(showSpectToggled()));
    connect(this, SIGNAL(canPlay(bool)), m_showSpect, SLOT(setEnabled(bool)));

    Pane::registerShortcuts(*m_keyReference);

    updateLayerStatuses();
}


void
MainWindow::moveOneNoteRight()
{
    // cerr << "MainWindow::moveOneNoteRight" << endl;
    moveByOneNote(true, false);
}

void
MainWindow::moveOneNoteLeft()
{
    // cerr << "MainWindow::moveOneNoteLeft" << endl;
    moveByOneNote(false, false);
}

void
MainWindow::selectOneNoteRight()
{
    moveByOneNote(true, true);
}

void
MainWindow::selectOneNoteLeft()
{
    moveByOneNote(false, true);
}


void
MainWindow::moveByOneNote(bool right, bool doSelect)
{
    sv_frame_t frame = m_viewManager->getPlaybackFrame();
    cerr << "MainWindow::moveByOneNote startframe: " << frame << endl;
    
    bool isAtSelectionBoundary = false;
    MultiSelection::SelectionList selections = m_viewManager->getSelections();
    if (!selections.empty()) {
        Selection sel = *selections.begin();
        isAtSelectionBoundary = (frame == sel.getStartFrame()) || (frame == sel.getEndFrame());
    }
    if (!doSelect || !isAtSelectionBoundary) {
        m_selectionAnchor = frame;
    }

    Layer *layer = m_analyser->getLayer(Analyser::Notes);
    if (!layer) return;

    NoteModel *model = qobject_cast<NoteModel *>(layer->getModel());
    if (!model) return;

    //!!! This seems like a strange and inefficient way to do this -
    //!!! there is almost certainly a better way making use of
    //!!! EventSeries api
    
    EventVector points = model->getAllEvents();
    if (points.empty()) return;

    EventVector::iterator i = points.begin();
    std::set<sv_frame_t> snapFrames;
    snapFrames.insert(0);
    while (i != points.end()) {
        snapFrames.insert(i->getFrame());
        snapFrames.insert(i->getFrame() + i->getDuration() + 1);
        ++i;
    }
    std::set<sv_frame_t>::iterator i2;
    if (snapFrames.find(frame) == snapFrames.end()) {
        // we're not on an existing snap point, so go to previous
        snapFrames.insert(frame);
    }
    i2 = snapFrames.find(frame);
    if (right) {
        i2++;
        if (i2 == snapFrames.end()) i2--;
    } else {
        if (i2 != snapFrames.begin()) i2--;
    }
    frame = *i2;
    m_viewManager->setPlaybackFrame(frame);
    if (doSelect) {
        Selection sel;
        if (frame > m_selectionAnchor) {
            sel = Selection(m_selectionAnchor, frame);
        } else {
            sel = Selection(frame, m_selectionAnchor);
        }
        m_viewManager->setSelection(sel);
    }
    cerr << "MainWindow::moveByOneNote endframe: " << frame << endl;
}

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

void
MainWindow::toolEditSelected()
{
    cerr << "MainWindow::toolEditSelected" << endl;
    m_viewManager->setToolMode(ViewManager::NoteEditMode);
    m_intelligentActionOn = true;
    m_analyser->setIntelligentActions(m_intelligentActionOn);
}

void
MainWindow::toolFreeEditSelected()
{
    m_viewManager->setToolMode(ViewManager::NoteEditMode);
    m_intelligentActionOn = false;
    m_analyser->setIntelligentActions(m_intelligentActionOn);
}

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

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

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

    bool haveMainModel =
	(getMainModel() != 0);
    bool havePlayTarget =
	(m_playTarget != 0 || m_audioIO != 0);
    bool haveCurrentPane =
        (currentPane != 0);
    bool haveCurrentLayer =
        (haveCurrentPane &&
         (currentLayer != 0));
    bool haveSelection = 
        (m_viewManager &&
         !m_viewManager->getSelections().empty());
    bool haveCurrentTimeInstantsLayer = 
        (haveCurrentLayer &&
         qobject_cast<TimeInstantLayer *>(currentLayer));
    bool haveCurrentTimeValueLayer = 
        (haveCurrentLayer &&
         qobject_cast<TimeValueLayer *>(currentLayer));
    bool pitchCandidatesVisible = 
        m_analyser->arePitchCandidatesShown();

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

    bool haveWaveform =
        m_analyser->isVisible(Analyser::Audio) &&
        m_analyser->getLayer(Analyser::Audio);

    bool havePitchTrack = 
        m_analyser->isVisible(Analyser::PitchTrack) &&
        m_analyser->getLayer(Analyser::PitchTrack);

    bool haveNotes = 
        m_analyser->isVisible(Analyser::Notes) &&
        m_analyser->getLayer(Analyser::Notes);

    emit canExportPitchTrack(havePitchTrack);
    emit canExportNotes(haveNotes);
    emit canSnapNotes(haveSelection && haveNotes);

    emit canPlayWaveform(haveWaveform && haveMainModel && havePlayTarget);
    emit canPlayPitch(havePitchTrack && haveMainModel && havePlayTarget);
    emit canPlayNotes(haveNotes && haveMainModel && havePlayTarget);

    if (pitchCandidatesVisible) {
        m_showCandidatesAction->setText(tr("Hide Pitch Candidates"));
        m_showCandidatesAction->setStatusTip(tr("Remove the display of alternate pitch candidates for the selected region"));
    } else {
        m_showCandidatesAction->setText(tr("Show Pitch Candidates"));
        m_showCandidatesAction->setStatusTip(tr("Show alternate pitch candidates for the selected region"));
    }

    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::showAudioToggled()
{
    m_analyser->toggleVisible(Analyser::Audio);

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

    bool playOn = false;
    if (m_analyser->isVisible(Analyser::Audio)) {
        // just switched layer on; check whether playback was also on previously
        playOn = settings.value("playaudiowas", true).toBool();
    } else {
        settings.setValue("playaudiowas", m_playAudio->isChecked());
    }
    m_analyser->setAudible(Analyser::Audio, playOn);

    settings.endGroup();

    updateMenuStates();
    updateLayerStatuses();
}

void
MainWindow::showPitchToggled()
{
    m_analyser->toggleVisible(Analyser::PitchTrack);

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

    bool playOn = false;
    if (m_analyser->isVisible(Analyser::PitchTrack)) {
        // just switched layer on; check whether playback was also on previously
        playOn = settings.value("playpitchwas", true).toBool();
    } else {
        settings.setValue("playpitchwas", m_playPitch->isChecked());
    }
    m_analyser->setAudible(Analyser::PitchTrack, playOn);

    settings.endGroup();

    updateMenuStates();
    updateLayerStatuses();
}

void
MainWindow::showSpectToggled()
{
    m_analyser->toggleVisible(Analyser::Spectrogram);
}

void
MainWindow::showNotesToggled()
{
    m_analyser->toggleVisible(Analyser::Notes);

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

    bool playOn = false;
    if (m_analyser->isVisible(Analyser::Notes)) {
        // just switched layer on; check whether playback was also on previously
        playOn = settings.value("playnoteswas", true).toBool();
    } else {
        settings.setValue("playnoteswas", m_playNotes->isChecked());
    }
    m_analyser->setAudible(Analyser::Notes, playOn);

    settings.endGroup();

    updateMenuStates();
    updateLayerStatuses();
}

void
MainWindow::playAudioToggled()
{
    m_analyser->toggleAudible(Analyser::Audio);
    updateLayerStatuses();
}

void
MainWindow::playPitchToggled()
{
    m_analyser->toggleAudible(Analyser::PitchTrack);
    updateLayerStatuses();
}

void
MainWindow::playNotesToggled()
{
    m_analyser->toggleAudible(Analyser::Notes);
    updateLayerStatuses();
}

void
MainWindow::updateLayerStatuses()
{
    m_showAudio->setChecked(m_analyser->isVisible(Analyser::Audio));
    m_playAudio->setChecked(m_analyser->isAudible(Analyser::Audio));
    m_audioLPW->setEnabled(m_analyser->isAudible(Analyser::Audio));
    m_audioLPW->setLevel(m_analyser->getGain(Analyser::Audio));
    m_audioLPW->setPan(m_analyser->getPan(Analyser::Audio));
    
    m_showPitch->setChecked(m_analyser->isVisible(Analyser::PitchTrack));
    m_playPitch->setChecked(m_analyser->isAudible(Analyser::PitchTrack));
    m_pitchLPW->setEnabled(m_analyser->isAudible(Analyser::PitchTrack));
    m_pitchLPW->setLevel(m_analyser->getGain(Analyser::PitchTrack));
    m_pitchLPW->setPan(m_analyser->getPan(Analyser::PitchTrack));

    m_showNotes->setChecked(m_analyser->isVisible(Analyser::Notes));
    m_playNotes->setChecked(m_analyser->isAudible(Analyser::Notes));
    m_notesLPW->setEnabled(m_analyser->isAudible(Analyser::Notes));
    m_notesLPW->setLevel(m_analyser->getGain(Analyser::Notes));
    m_notesLPW->setPan(m_analyser->getPan(Analyser::Notes));

    m_showSpect->setChecked(m_analyser->isVisible(Analyser::Spectrogram));
}

void
MainWindow::editDisplayExtents()
{
    double min, max;
    double vmin = 0;
    double vmax = getMainModel()->getSampleRate() /2;
    
    if (!m_analyser->getDisplayFrequencyExtents(min, max)) {
        //!!!
        return;
    }

    RangeInputDialog dialog(tr("Set frequency range"),
                            tr("Enter new frequency range, from %1 to %2 Hz.\nThese values will be rounded to the nearest spectrogram bin.")
                            .arg(vmin).arg(vmax),
                            "Hz", float(vmin), float(vmax), this);
    dialog.setRange(float(min), float(max));

    if (dialog.exec() == QDialog::Accepted) {
        float fmin, fmax;
        dialog.getRange(fmin, fmax);
        min = fmin;
        max = fmax;
        if (min > max) {
            double tmp = max;
            max = min;
            min = tmp;
        }
        m_analyser->setDisplayFrequencyExtents(min, max);
    }
}

void
MainWindow::updateDescriptionLabel()
{
    // Nothing, we don't have one
}

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

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

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

    closeSession();
    createDocument();
    m_document->setAutoAlignment(true);

    Pane *pane = m_paneStack->addPane();
    pane->setPlaybackFollow(PlaybackScrollPage);

    m_viewManager->setGlobalCentreFrame
        (pane->getFrameForX(width() / 2));
    
    connect(pane, SIGNAL(contextHelpChanged(const QString &)),
            this, SLOT(contextHelpChanged(const QString &)));

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

    m_overview->registerView(pane);

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

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

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

    m_analyser->fileClosed();

    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 = "";

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

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

    QString path = getOpenFileName(FileFinder::AnyFile);

    if (path.isEmpty()) return;

    FileOpenStatus status = openPath(path, ReplaceSession);

    if (status == FileOpenFailed) {
        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) {
        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 = openPath(text, ReplaceSession);

    if (status == FileOpenFailed) {
        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) {
        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 = qobject_cast<QAction *>(obj);
    
    if (!action) {
        cerr << "WARNING: MainWindow::openRecentFile: sender is not an action"
             << endl;
        return;
    }

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

    FileOpenStatus status = openPath(path, ReplaceSession);

    if (status == FileOpenFailed) {
        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) {
        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)
{
    pane->setPlaybackFollow(PlaybackScrollPage);
    m_paneStack->sizePanesEqually();
    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 = openPath(*i, ReplaceSession);

        if (status == FileOpenFailed) {
            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) {
            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)
{
//    cerr << "MainWindow::closeEvent" << endl;

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

    if (!m_abandoning && !checkSaveModified()) {
//        cerr << "Ignoring close event" << 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;

    closeSession();

    e->accept();
    return;
}

bool
MainWindow::commitData(bool mayAskUser)
{
    if (mayAskUser) {
        bool rv = checkSaveModified();
        return rv;
    } else {
        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;

    int button = 
        QMessageBox::warning(this,
                             tr("Session modified"),
                             tr("The current session has been modified.\nDo you want to save it?"),
                             QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel,
                             QMessageBox::Yes);

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

    // else cancel
    return false;
}

bool
MainWindow::waitForInitialAnalysis()
{
    // Called before saving a session. We can't safely save while the
    // initial analysis is happening, because then we end up with an
    // incomplete session on reload. There are certainly theoretically
    // better ways to handle this...
    
    QSettings settings;
    settings.beginGroup("Analyser");
    bool autoAnalyse = settings.value("auto-analysis", true).toBool();
    settings.endGroup();

    if (!autoAnalyse) {
        return true;
    }

    if (!m_analyser || m_analyser->getInitialAnalysisCompletion() >= 100) {
        return true;
    }

    QMessageBox mb(QMessageBox::Information,
                   tr("Waiting for analysis"),
                   tr("Waiting for initial analysis to finish before loading or saving..."),
                   QMessageBox::Cancel,
                   this);

    connect(m_analyser, SIGNAL(initialAnalysisCompleted()), 
            &mb, SLOT(accept()));

    if (mb.exec() == QDialog::Accepted) {
        return true;
    } else {
        return false;
    }
}

void
MainWindow::saveSession()
{
    // We do not want to save mid-analysis regions -- that would cause
    // confusion on reloading
    m_analyser->clearReAnalysis();
    clearSelection();

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

void
MainWindow::saveSessionInAudioPath()
{
    if (m_audioFile == "") return;

    if (!waitForInitialAnalysis()) return;

    // We do not want to save mid-analysis regions -- that would cause
    // confusion on reloading
    m_analyser->clearReAnalysis();
    clearSelection();

    QString filepath = QFileInfo(m_audioFile).absoluteDir().canonicalPath();
    QString basename = QFileInfo(m_audioFile).completeBaseName();

    QString path = QDir(filepath).filePath(basename + ".ton");

    cerr << path << endl;

    // We don't want to overwrite an existing .ton file unless we put
    // it there in the first place
    bool shouldVerify = true;
    if (m_sessionFile == path) {
        shouldVerify = false;
    }

    if (shouldVerify && QFileInfo(path).exists()) {
        if (QMessageBox::question(0, tr("File exists"),
                                  tr("<b>File exists</b><p>The file \"%1\" already exists.\nDo you want to overwrite it?").arg(path),
                                  QMessageBox::Ok,
                                  QMessageBox::Cancel) != QMessageBox::Ok) {
            return;
        }
    }

    if (!waitForInitialAnalysis()) {
        QMessageBox::warning(this, tr("File not saved"),
                             tr("Wait cancelled: the session has not been saved."));
    }

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

void
MainWindow::saveSessionAs()
{
    // We do not want to save mid-analysis regions -- that would cause
    // confusion on reloading
    m_analyser->clearReAnalysis();
    clearSelection();

    QString path = getSaveFileName(FileFinder::SessionFile);

    if (path == "") {
        return;
    }

    if (!waitForInitialAnalysis()) {
        QMessageBox::warning(this, tr("File not saved"),
                             tr("Wait cancelled: the session has not been saved."));
        return;
    }

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

QString
MainWindow::exportToSVL(QString path, Layer *layer)
{
    Model *model = layer->getModel();

    QFile file(path);
    if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
        return 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";

        return "";
    }
}

void
MainWindow::importPitchLayer()
{
    QString path = getOpenFileName(FileFinder::LayerFileNoMidiNonSV);
    if (path == "") return;

    FileOpenStatus status = importPitchLayer(path);

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

MainWindow::FileOpenStatus
MainWindow::importPitchLayer(FileSource source)
{
    if (!source.isAvailable()) return FileOpenFailed;
    source.waitForData();

    if (!waitForInitialAnalysis()) return FileOpenCancelled;
    
    QString path = source.getLocalFilename();

    RDFImporter::RDFDocumentType rdfType = 
        RDFImporter::identifyDocumentType(QUrl::fromLocalFile(path).toString());

    if (rdfType != RDFImporter::NotRDF) {

        //!!!
        return FileOpenFailed;

    } else if (source.getExtension().toLower() == "svl" ||
               (source.getExtension().toLower() == "xml" &&
                (SVFileReader::identifyXmlFile(source.getLocalFilename())
                 == SVFileReader::SVLayerFile))) {
        
        //!!!
        return FileOpenFailed;

    } else {
        
        try {

            CSVFormat format(path);
            format.setSampleRate(getMainModel()->getSampleRate());

            if (format.getModelType() != CSVFormat::TwoDimensionalModel) {
                //!!! error report
                return FileOpenFailed;
            }

            Model *model = DataFileReaderFactory::loadCSV
                (path, format, getMainModel()->getSampleRate());

            if (model) {

                SVDEBUG << "MainWindow::importPitchLayer: Have model" << endl;

                CommandHistory::getInstance()->startCompoundOperation
                    (tr("Import Pitch Track"), true);

                Layer *newLayer = m_document->createImportedLayer(model);

                m_analyser->takePitchTrackFrom(newLayer);

                m_document->deleteLayer(newLayer);

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

                //!!! swap all data in to existing layer instead of this

                if (!source.isRemote()) {
                    registerLastOpenedFilePath
                        (FileFinder::LayerFile,
                         path); // for file dialog
                }

                return FileOpenSucceeded;
            }
        } catch (DataFileReaderFactory::Exception e) {
            if (e == DataFileReaderFactory::ImportCancelled) {
                return FileOpenCancelled;
            }
        }
    }
    
    return FileOpenFailed;
}

void
MainWindow::exportPitchLayer()
{
    Layer *layer = m_analyser->getLayer(Analyser::PitchTrack);
    if (!layer) return;

    SparseTimeValueModel *model =
        qobject_cast<SparseTimeValueModel *>(layer->getModel());
    if (!model) return;

    FileFinder::FileType type = FileFinder::LayerFileNoMidiNonSV;

    QString path = getSaveFileName(type);

    if (path == "") return;

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

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

    QString error;

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

        error = exportToSVL(path, layer);

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

        RDFExporter exporter(path, model);
        exporter.write();
        if (!exporter.isOK()) {
            error = exporter.getError();
        }

    } else {

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

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

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

void
MainWindow::exportNoteLayer()
{
    Layer *layer = m_analyser->getLayer(Analyser::Notes);
    if (!layer) return;

    NoteModel *model = qobject_cast<NoteModel *>(layer->getModel());
    if (!model) return;

    FileFinder::FileType type = FileFinder::LayerFileNonSV;

    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") {

        error = exportToSVL(path, layer);

    } else if (suffix == "mid" || suffix == "midi") {
     
        MIDIFileWriter writer(path, model, model->getSampleRate());
        writer.write();
        if (!writer.isOK()) {
            error = writer.getError();
        }

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

        RDFExporter exporter(path, model);
        exporter.write();
        if (!exporter.isOK()) {
            error = exporter.getError();
        }

    } else {

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

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

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

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

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

    openLocalFolder(path);
}

void
MainWindow::doubleClickSelectInvoked(sv_frame_t frame)
{
    sv_frame_t f0, f1;
    m_analyser->getEnclosingSelectionScope(frame, f0, f1);
    
    cerr << "MainWindow::doubleClickSelectInvoked(" << frame << "): [" << f0 << "," << f1 << "]" << endl;

    Selection sel(f0, f1);
    m_viewManager->setSelection(sel);
}

void
MainWindow::abandonSelection()
{
    // Named abandonSelection rather than clearSelection to indicate
    // that this is an active operation -- it restores the original
    // content of the pitch track in the selected region rather than
    // simply un-selecting.

    cerr << "MainWindow::abandonSelection()" << endl;

    CommandHistory::getInstance()->startCompoundOperation(tr("Abandon Selection"), true);

    MultiSelection::SelectionList selections = m_viewManager->getSelections();
    if (!selections.empty()) {
        Selection sel = *selections.begin();
        m_analyser->abandonReAnalysis(sel);
        auxSnapNotes(sel);
    }

    MainWindowBase::clearSelection();

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

void
MainWindow::selectionChangedByUser()
{
    if (!m_document) {
        // we're exiting, most likely
        return;
    }

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

    cerr << "MainWindow::selectionChangedByUser" << endl;

    m_analyser->showPitchCandidates(m_pendingConstraint.isConstrained());

    if (!selections.empty()) {
        Selection sel = *selections.begin();
        cerr << "MainWindow::selectionChangedByUser: have selection" << endl;
        QString error = m_analyser->reAnalyseSelection
            (sel, m_pendingConstraint);
        if (error != "") {
            QMessageBox::critical
                (this, tr("Failed to analyse selection"),
                 tr("<b>Analysis failed</b><p>%2</p>").arg(error));
        }
    }

    m_pendingConstraint = Analyser::FrequencyRange();
}

void
MainWindow::regionOutlined(QRect r)
{
    cerr << "MainWindow::regionOutlined(" << r.x() << "," << r.y() << "," << r.width() << "," << r.height() << ")" << endl;

    Pane *pane = qobject_cast<Pane *>(sender());
    if (!pane) {
        cerr << "MainWindow::regionOutlined: not sent by pane, ignoring" << endl;
        return;
    }

    if (!m_analyser) {
        cerr << "MainWindow::regionOutlined: no analyser, ignoring" << endl;
        return;
    }

    SpectrogramLayer *spectrogram = qobject_cast<SpectrogramLayer *>
        (m_analyser->getLayer(Analyser::Spectrogram));
    if (!spectrogram) {
        cerr << "MainWindow::regionOutlined: no spectrogram layer, ignoring" << endl;
        return;
    }

    sv_frame_t f0 = pane->getFrameForX(r.x());
    sv_frame_t f1 = pane->getFrameForX(r.x() + r.width());
    
    double v0 = spectrogram->getFrequencyForY(pane, r.y() + r.height());
    double v1 = spectrogram->getFrequencyForY(pane, r.y());

    cerr << "MainWindow::regionOutlined: frame " << f0 << " -> " << f1 
         << ", frequency " << v0 << " -> " << v1 << endl;

    m_pendingConstraint = Analyser::FrequencyRange(v0, v1);

    Selection sel(f0, f1);
    m_viewManager->setSelection(sel);
}

void
MainWindow::clearPitches()
{
    MultiSelection::SelectionList selections = m_viewManager->getSelections();

    CommandHistory::getInstance()->startCompoundOperation(tr("Clear Pitches"), true);

    for (MultiSelection::SelectionList::iterator k = selections.begin();
         k != selections.end(); ++k) {
        m_analyser->deletePitches(*k);
        auxSnapNotes(*k);
    }

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

void
MainWindow::octaveShift(bool up)
{
    MultiSelection::SelectionList selections = m_viewManager->getSelections();

    CommandHistory::getInstance()->startCompoundOperation
        (up ? tr("Choose Higher Octave") : tr("Choose Lower Octave"), true);

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

        m_analyser->shiftOctave(*k, up);
        auxSnapNotes(*k);
    }

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

void
MainWindow::togglePitchCandidates()
{
    CommandHistory::getInstance()->startCompoundOperation(tr("Toggle Pitch Candidates"), true);

    m_analyser->showPitchCandidates(!m_analyser->arePitchCandidatesShown());

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

    updateMenuStates();
}

void
MainWindow::switchPitchUp()
{
    if (m_analyser->arePitchCandidatesShown()) {
        if (m_analyser->haveHigherPitchCandidate()) {

            CommandHistory::getInstance()->startCompoundOperation
                (tr("Choose Higher Pitch Candidate"), true);

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

            for (MultiSelection::SelectionList::iterator k = selections.begin();
                 k != selections.end(); ++k) {
                m_analyser->switchPitchCandidate(*k, true);
                auxSnapNotes(*k);
            }

            CommandHistory::getInstance()->endCompoundOperation();
        }
    } else {
        octaveShift(true);
    }
}

void
MainWindow::switchPitchDown()
{
    if (m_analyser->arePitchCandidatesShown()) {
        if (m_analyser->haveLowerPitchCandidate()) {

            CommandHistory::getInstance()->startCompoundOperation
                (tr("Choose Lower Pitch Candidate"), true);

            MultiSelection::SelectionList selections = m_viewManager->getSelections();
            
            for (MultiSelection::SelectionList::iterator k = selections.begin();
                 k != selections.end(); ++k) {
                m_analyser->switchPitchCandidate(*k, false);
                auxSnapNotes(*k);
            }

            CommandHistory::getInstance()->endCompoundOperation();
        }
    } else {
        octaveShift(false);
    }
}

void
MainWindow::snapNotesToPitches()
{
    cerr << "in snapNotesToPitches" << endl;
    MultiSelection::SelectionList selections = m_viewManager->getSelections();

    if (!selections.empty()) {

        CommandHistory::getInstance()->startCompoundOperation
            (tr("Snap Notes to Pitches"), true);
                
        for (MultiSelection::SelectionList::iterator k = selections.begin();
             k != selections.end(); ++k) {
            auxSnapNotes(*k);
        }
        
        CommandHistory::getInstance()->endCompoundOperation();
    }
}

void
MainWindow::auxSnapNotes(Selection s)
{
    cerr << "in auxSnapNotes" << endl;
    FlexiNoteLayer *layer =
        qobject_cast<FlexiNoteLayer *>(m_analyser->getLayer(Analyser::Notes));
    if (!layer) return;

    layer->snapSelectedNotesToPitchTrack(m_analyser->getPane(), s);
}    

void
MainWindow::splitNote()
{
    FlexiNoteLayer *layer =
        qobject_cast<FlexiNoteLayer *>(m_analyser->getLayer(Analyser::Notes));
    if (!layer) return;

    layer->splitNotesAt(m_analyser->getPane(), m_viewManager->getPlaybackFrame());
}

void
MainWindow::mergeNotes()
{
    FlexiNoteLayer *layer =
        qobject_cast<FlexiNoteLayer *>(m_analyser->getLayer(Analyser::Notes));
    if (!layer) return;

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

    if (!selections.empty()) {

        CommandHistory::getInstance()->startCompoundOperation
            (tr("Merge Notes"), true);
                
        for (MultiSelection::SelectionList::iterator k = selections.begin();
             k != selections.end(); ++k) {
            layer->mergeNotes(m_analyser->getPane(), *k, true);
        }
        
        CommandHistory::getInstance()->endCompoundOperation();
    }
}

void
MainWindow::deleteNotes()
{
    FlexiNoteLayer *layer =
        qobject_cast<FlexiNoteLayer *>(m_analyser->getLayer(Analyser::Notes));
    if (!layer) return;

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

    if (!selections.empty()) {

        CommandHistory::getInstance()->startCompoundOperation
            (tr("Delete Notes"), true);
                
        for (MultiSelection::SelectionList::iterator k = selections.begin();
             k != selections.end(); ++k) {
            layer->deleteSelectionInclusive(*k);
        }
        
        CommandHistory::getInstance()->endCompoundOperation();
    }
}


void
MainWindow::formNoteFromSelection()
{
    Pane *pane = m_analyser->getPane();
    Layer *layer0 = m_analyser->getLayer(Analyser::Notes);
    NoteModel *model = qobject_cast<NoteModel *>(layer0->getModel());
    FlexiNoteLayer *layer = qobject_cast<FlexiNoteLayer *>(layer0);
    if (!layer) return;

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

    if (!selections.empty()) {
    
        CommandHistory::getInstance()->startCompoundOperation
            (tr("Form Note from Selection"), true);

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

            // Chop existing events at start and end frames; remember
            // the first starting pitch, to use as default for new
            // note; delete existing events; create new note; ask
            // layer to merge, just in order to adapt the note to the
            // existing pitch track if possible. This way we should
            // handle all the possible cases of existing notes that
            // may or may not overlap the start or end times
            
            sv_frame_t start = k->getStartFrame();
            sv_frame_t end = k->getEndFrame();

            EventVector existing =
                model->getEventsStartingWithin(start, end - start);

            int defaultPitch = 100;
            if (!existing.empty()) {
                defaultPitch = int(roundf(existing.begin()->getValue()));
            }
            
            layer->splitNotesAt(pane, start);
            layer->splitNotesAt(pane, end);
            layer->deleteSelection(*k);
            
            layer->addNoteOn(start, defaultPitch, 100);
            layer->addNoteOff(end, defaultPitch);
            
            layer->mergeNotes(pane, *k, false);
        }

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

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

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

    int centre = m_playSpeed->defaultValue();

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

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

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

    updateMenuStates();
}

void
MainWindow::playSharpenToggled()
{
    QSettings settings;
    settings.beginGroup("MainWindow");
    settings.setValue("playsharpen", m_playSharpen->isChecked());
    settings.endGroup();

    playSpeedChanged(m_playSpeed->value());
    // TODO: pitch gain?
}

void
MainWindow::playMonoToggled()
{
    QSettings settings;
    settings.beginGroup("MainWindow");
    settings.setValue("playmono", m_playMono->isChecked());
    settings.endGroup();

    playSpeedChanged(m_playSpeed->value());
    // TODO: pitch gain?
}    

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::audioGainChanged(float gain)
{
    double db = AudioLevel::multiplier_to_dB(gain);
    cerr << "gain = " << gain << " (" << db << " dB)" << endl;
    contextHelpChanged(tr("Audio Gain: %1 dB").arg(db));
    if (gain == 0.f) {
        m_analyser->setAudible(Analyser::Audio, false);
    } else {
        m_analyser->setAudible(Analyser::Audio, true);
        m_analyser->setGain(Analyser::Audio, gain);
    }
    updateMenuStates();
} 

void
MainWindow::pitchGainChanged(float gain)
{
    double db = AudioLevel::multiplier_to_dB(gain);
    cerr << "gain = " << gain << " (" << db << " dB)" << endl;
    contextHelpChanged(tr("Pitch Gain: %1 dB").arg(db));
    if (gain == 0.f) {
        m_analyser->setAudible(Analyser::PitchTrack, false);
    } else {
        m_analyser->setAudible(Analyser::PitchTrack, true);
        m_analyser->setGain(Analyser::PitchTrack, gain);
    }
    updateMenuStates();
} 

void
MainWindow::notesGainChanged(float gain)
{
    double db = AudioLevel::multiplier_to_dB(gain);
    cerr << "gain = " << gain << " (" << db << " dB)" << endl;
    contextHelpChanged(tr("Notes Gain: %1 dB").arg(db));
    if (gain == 0.f) {
        m_analyser->setAudible(Analyser::Notes, false);
    } else {
        m_analyser->setAudible(Analyser::Notes, true);
        m_analyser->setGain(Analyser::Notes, gain);
    }
    updateMenuStates();
} 

void
MainWindow::audioPanChanged(float pan)
{
    contextHelpChanged(tr("Audio Pan: %1").arg(pan));
    m_analyser->setPan(Analyser::Audio, pan);
    updateMenuStates();
} 

void
MainWindow::pitchPanChanged(float pan)
{
    contextHelpChanged(tr("Pitch Pan: %1").arg(pan));
    m_analyser->setPan(Analyser::PitchTrack, pan);
    updateMenuStates();
} 

void
MainWindow::notesPanChanged(float pan)
{
    contextHelpChanged(tr("Notes Pan: %1").arg(pan));
    m_analyser->setPan(Analyser::Notes, pan);
    updateMenuStates();
} 

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

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

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

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

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

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

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

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

    RealTime duration = end - start;

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

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

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

}

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

void
MainWindow::sampleRateMismatch(sv_samplerate_t ,
                               sv_samplerate_t ,
                               bool )
{
    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)
{
    MainWindowBase::layerRemoved(layer);
}

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

void
MainWindow::modelAdded(Model *model)
{
    MainWindowBase::modelAdded(model);
    DenseTimeValueModel *dtvm = qobject_cast<DenseTimeValueModel *>(model);
    if (dtvm) {
        cerr << "A dense time-value model (such as an audio file) has been loaded" << endl;
    }
}

void
MainWindow::modelAboutToBeDeleted(Model *model)
{
    MainWindowBase::modelAboutToBeDeleted(model);
}

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

    MainWindowBase::mainModelChanged(model);

    if (m_playTarget || m_audioIO) {
        connect(m_fader, SIGNAL(valueChanged(float)),
                this, SLOT(mainModelGainChanged(float)));
    }
}

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

void
MainWindow::analyseNow()
{
    cerr << "analyseNow called" << endl;
    if (!m_analyser) return;

    CommandHistory::getInstance()->startCompoundOperation
        (tr("Analyse Audio"), true);

    QString error = m_analyser->analyseExistingFile();

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

    if (error != "") {
        QMessageBox::warning
            (this,
             tr("Failed to analyse audio"),
             tr("<b>Analysis failed</b><p>%1</p>").arg(error),
             QMessageBox::Ok);
    }
}

void
MainWindow::analyseNewMainModel()
{
    WaveFileModel *model = getMainModel();

    cerr << "MainWindow::analyseNewMainModel: main model is " << model << endl;

    cerr << "(document is " << m_document << ", it says main model is " << m_document->getMainModel() << ")" << endl;
    
    if (!model) {
        cerr << "no main model!" << endl;
        return;
    }

    if (!m_paneStack) {
        cerr << "no pane stack!" << endl;
        return;
    }

    int pc = m_paneStack->getPaneCount();
    Pane *pane = 0;
    Pane *selectionStrip = 0;

    if (pc < 2) {
        pane = m_paneStack->addPane();
        selectionStrip = m_paneStack->addPane();
        m_document->addLayerToView
            (selectionStrip,
             m_document->createMainModelLayer(LayerFactory::TimeRuler));
    } else {
        pane = m_paneStack->getPane(0);
        selectionStrip = m_paneStack->getPane(1);
    }

    pane->setPlaybackFollow(PlaybackScrollPage);

    if (selectionStrip) {
        selectionStrip->setPlaybackFollow(PlaybackScrollPage);
        selectionStrip->setFixedHeight(26);
        m_paneStack->sizePanesEqually();
        m_viewManager->clearToolModeOverrides();
        m_viewManager->setToolModeFor(selectionStrip,
                                      ViewManager::SelectMode);
    }

    if (pane) {

        disconnect(pane, SIGNAL(regionOutlined(QRect)),
                   pane, SLOT(zoomToRegion(QRect)));
        connect(pane, SIGNAL(regionOutlined(QRect)),
                this, SLOT(regionOutlined(QRect)));

        QString error = m_analyser->newFileLoaded
            (m_document, getMainModel(), m_paneStack, pane);
        if (error != "") {
            QMessageBox::warning
                (this,
                 tr("Failed to analyse audio"),
                 tr("<b>Analysis failed</b><p>%1</p>").arg(error),
                 QMessageBox::Ok);
        }
    }

    if (!m_withSpectrogram) 
    {
        m_analyser->setVisible(Analyser::Spectrogram, false);
    }

    if (!m_withSonification) 
    {
        m_analyser->setAudible(Analyser::PitchTrack, false);
        m_analyser->setAudible(Analyser::Notes, false);
    }
   
    updateLayerStatuses();
    documentRestored();
}

void
MainWindow::modelGenerationFailed(QString transformName, QString message)
{
    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)
{
    QMessageBox::warning
        (this, tr("Warning"), message, QMessageBox::Ok);
}

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

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

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

void
MainWindow::handleOSCMessage(const OSCMessage &)
{
    cerr << "MainWindow::handleOSCMessage: Not implemented" << endl;
}

void
MainWindow::mouseEnteredWidget()
{
    QWidget *w = qobject_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"));
    } else if (w == m_playSharpen && w->isEnabled()) {
        contextHelpChanged(tr("Toggle transient sharpening for playback time scaling"));
    } else if (w == m_playMono && w->isEnabled()) {
        contextHelpChanged(tr("Toggle mono mode for playback time scaling"));
    }
}

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

void
MainWindow::website()
{
    //!!! todo: URL!
    openHelpUrl(tr("http://code.soundsoftware.ac.uk/projects/tony/"));
}

void
MainWindow::help()
{
    //!!! todo: help URL!
    openHelpUrl(tr("http://code.soundsoftware.ac.uk/projects/tony/wiki/Reference"));
}

void
MainWindow::about()
{
    bool debug = false;
    QString version = "(unknown version)";

#ifdef BUILD_DEBUG
    debug = true;
#endif
    version = tr("Release %1").arg(TONY_VERSION);

    QString aboutText;

    aboutText += tr("<h3>About Tony</h3>");
    aboutText += tr("<p>Tony is a program for interactive note and pitch analysis and annotation.</p>");
    aboutText += tr("<p>%1 : %2 configuration</p>")
        .arg(version)
        .arg(debug ? tr("Debug") : tr("Release"));
    aboutText += tr("<p>Using Qt framework version %1.</p>")
        .arg(QT_VERSION_STR);

    aboutText += 
        "<p>Copyright &copy; 2005&ndash;2015 Chris Cannam, Queen Mary University of London, and the Tony project authors: Matthias Mauch, George Fazekas, Justin Salamon, and Rachel Bittner.</p>"
        "<p>pYIN analysis plugin written by Matthias Mauch.</p>"
        "<p>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.</p>";
    
    QMessageBox::about(this, tr("About %1").arg(QApplication::applicationName()), aboutText);
}

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

void
MainWindow::newerVersionAvailable(QString version)
{
    //!!! nicer URL would be nicer
    QSettings settings;
    settings.beginGroup("NewerVersionWarning");
    QString tag = QString("version-%1-available-show").arg(version);
    if (settings.value(tag, true).toBool()) {
        QString title(tr("Newer version available"));
        QString text(tr("<h3>Newer version available</h3><p>You are using version %1 of Tony, but version %2 is now available.</p><p>Please see the <a href=\"http://code.soundsoftware.ac.uk/projects/tony/\">Tony website</a> for more information.</p>").arg(TONY_VERSION).arg(version));
        QMessageBox::information(this, title, text);
        settings.setValue(tag, false);
    }
    settings.endGroup();
}

void
MainWindow::ffwd()
{
    if (!getMainModel()) return;

    sv_frame_t frame = m_viewManager->getPlaybackFrame();
    ++frame;

    sv_samplerate_t sr = getMainModel()->getSampleRate();

    // The step is supposed to scale and be as wide as a step of 
    // m_defaultFfwdRwdStep seconds at zoom level 720 and sr = 44100
    
    ZoomLevel zoom = m_viewManager->getGlobalZoom();
    double framesPerPixel = 1.0;
    if (zoom.zone == ZoomLevel::FramesPerPixel) {
        framesPerPixel = zoom.level;
    } else {
        framesPerPixel = 1.0 / zoom.level;
    }
    double defaultFramesPerPixel = (720 * 44100) / sr;
    double scaler = framesPerPixel / defaultFramesPerPixel;
    RealTime step = m_defaultFfwdRwdStep * scaler;
    
    frame = RealTime::realTime2Frame
        (RealTime::frame2RealTime(frame, sr) + step, sr);

    if (frame > getMainModel()->getEndFrame()) {
        frame = getMainModel()->getEndFrame();
    }
       
    if (frame < 0) frame = 0;

    if (m_viewManager->getPlaySelectionMode()) {
        frame = m_viewManager->constrainFrameToSelection(frame);
    }
    
    m_viewManager->setPlaybackFrame(frame);

    if (frame == getMainModel()->getEndFrame() &&
        m_playSource &&
        m_playSource->isPlaying() &&
        !m_viewManager->getPlayLoopMode()) {
        stop();
    }
}

void
MainWindow::rewind()
{
    if (!getMainModel()) return;

    sv_frame_t frame = m_viewManager->getPlaybackFrame();
    if (frame > 0) --frame;

    sv_samplerate_t sr = getMainModel()->getSampleRate();

    // The step is supposed to scale and be as wide as a step of 
    // m_defaultFfwdRwdStep seconds at zoom level 720 and sr = 44100

    ZoomLevel zoom = m_viewManager->getGlobalZoom();
    double framesPerPixel = 1.0;
    if (zoom.zone == ZoomLevel::FramesPerPixel) {
        framesPerPixel = zoom.level;
    } else {
        framesPerPixel = 1.0 / zoom.level;
    }
    double defaultFramesPerPixel = (720 * 44100) / sr;
    double scaler = framesPerPixel / defaultFramesPerPixel;
    RealTime step = m_defaultFfwdRwdStep * scaler;

    frame = RealTime::realTime2Frame
        (RealTime::frame2RealTime(frame, sr) - step, sr);
    
    if (frame < getMainModel()->getStartFrame()) {
        frame = getMainModel()->getStartFrame();
    }

    if (frame < 0) frame = 0;

    if (m_viewManager->getPlaySelectionMode()) {
        frame = m_viewManager->constrainFrameToSelection(frame);
    }

    m_viewManager->setPlaybackFrame(frame);
}