view main/MainWindow.cpp @ 25:e74f508db18c

* Add setRatio method to the time stretcher, and make it possible to change
  the ratio without having to construct and replace the time stretcher.  This
  means we can do it seamlessly.  Add a lot more ratios to the
  time stretch control in the main window

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

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    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 "document/Document.h"
#include "PreferencesDialog.h"

#include "view/Pane.h"
#include "view/PaneStack.h"
#include "data/model/WaveFileModel.h"
#include "data/model/SparseOneDimensionalModel.h"
#include "view/ViewManager.h"
#include "base/Preferences.h"
#include "layer/WaveformLayer.h"
#include "layer/TimeRulerLayer.h"
#include "layer/TimeInstantLayer.h"
#include "layer/TimeValueLayer.h"
#include "layer/Colour3DPlotLayer.h"
#include "widgets/Fader.h"
#include "view/Panner.h"
#include "widgets/PropertyBox.h"
#include "widgets/PropertyStack.h"
#include "widgets/AudioDial.h"
#include "widgets/LayerTree.h"
#include "widgets/ListInputDialog.h"
#include "audioio/AudioCallbackPlaySource.h"
#include "audioio/AudioCallbackPlayTarget.h"
#include "audioio/AudioTargetFactory.h"
#include "data/fileio/AudioFileReaderFactory.h"
#include "data/fileio/DataFileReaderFactory.h"
#include "data/fileio/WavFileWriter.h"
#include "data/fileio/CSVFileWriter.h"
#include "data/fileio/BZipFileDevice.h"
#include "base/RecentFiles.h"
#include "transform/TransformFactory.h"
#include "base/PlayParameterRepository.h"
#include "base/XmlExportable.h"
#include "base/CommandHistory.h"
#include "base/Profiler.h"
#include "base/Clipboard.h"

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

#include <QApplication>
#include <QPushButton>
#include <QFileDialog>
#include <QMessageBox>
#include <QGridLayout>
#include <QLabel>
#include <QAction>
#include <QMenuBar>
#include <QToolBar>
#include <QInputDialog>
#include <QStatusBar>
#include <QTreeView>
#include <QFile>
#include <QTextStream>
#include <QProcess>
#include <QShortcut>
#include <QSettings>
#include <QDateTime>
#include <QProcess>
#include <QCheckBox>

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

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


MainWindow::MainWindow() :
    m_document(0),
    m_paneStack(0),
    m_viewManager(0),
    m_panner(0),
    m_timeRulerLayer(0),
    m_playSource(0),
    m_playTarget(0),
    m_mainMenusCreated(false),
    m_paneMenu(0),
    m_layerMenu(0),
    m_existingLayersMenu(0),
    m_rightButtonMenu(0),
    m_rightButtonLayerMenu(0),
    m_documentModified(false),
    m_preferencesDialog(0)
{
    setWindowTitle(tr("Sonic Visualiser"));

    UnitDatabase::getInstance()->registerUnit("Hz");
    UnitDatabase::getInstance()->registerUnit("dB");

    connect(CommandHistory::getInstance(), SIGNAL(commandExecuted()),
	    this, SLOT(documentModified()));
    connect(CommandHistory::getInstance(), SIGNAL(documentRestored()),
	    this, SLOT(documentRestored()));

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

    QGridLayout *layout = new QGridLayout;
    
    m_viewManager = new ViewManager();
    connect(m_viewManager, SIGNAL(selectionChanged()),
	    this, SLOT(updateMenuStates()));

    m_descriptionLabel = new QLabel;

    m_paneStack = new PaneStack(frame, m_viewManager);
    connect(m_paneStack, SIGNAL(currentPaneChanged(Pane *)),
	    this, SLOT(currentPaneChanged(Pane *)));
    connect(m_paneStack, SIGNAL(currentLayerChanged(Pane *, Layer *)),
	    this, SLOT(currentLayerChanged(Pane *, Layer *)));
    connect(m_paneStack, SIGNAL(rightButtonMenuRequested(Pane *, QPoint)),
            this, SLOT(rightButtonMenuRequested(Pane *, QPoint)));

    m_panner = new Panner(frame);
    m_panner->setViewManager(m_viewManager);
    m_panner->setFixedHeight(40);

    m_panLayer = new WaveformLayer;
    m_panLayer->setChannelMode(WaveformLayer::MergeChannels);
//    m_panLayer->setScale(WaveformLayer::MeterScale);
    m_panLayer->setAutoNormalize(true);
    m_panLayer->setBaseColour(Qt::darkGreen);
    m_panLayer->setAggressiveCacheing(true);
    m_panner->addLayer(m_panLayer);

    m_playSource = new AudioCallbackPlaySource(m_viewManager);

    connect(m_playSource, SIGNAL(sampleRateMismatch(size_t, size_t, bool)),
	    this,           SLOT(sampleRateMismatch(size_t, size_t, bool)));

    m_fader = new Fader(frame, false);

    m_playSpeed = new AudioDial(frame);
    m_playSpeed->setMinimum(0);
    m_playSpeed->setMaximum(199);
    m_playSpeed->setValue(100);
    m_playSpeed->setFixedWidth(24);
    m_playSpeed->setFixedHeight(24);
    m_playSpeed->setNotchesVisible(true);
    m_playSpeed->setPageStep(10);
    m_playSpeed->setToolTip(tr("Playback speed: +0%"));
    m_playSpeed->setDefaultValue(100);
    connect(m_playSpeed, SIGNAL(valueChanged(int)),
	    this, SLOT(playSpeedChanged(int)));

    m_playSharpen = new QCheckBox(frame);
    m_playSharpen->setToolTip(tr("Sharpen percussive transients"));
    m_playSharpen->setEnabled(false);

    QSettings settings;
    settings.beginGroup("MainWindow");
    m_playSharpen->setChecked(settings.value("playsharpen", true).toBool());
    settings.endGroup();

    connect(m_playSharpen, SIGNAL(clicked()),
            this, SLOT(playSharpenToggled()));

    layout->addWidget(m_paneStack, 0, 0, 1, 4);
    layout->addWidget(m_panner, 1, 0);
    layout->addWidget(m_fader, 1, 1);
    layout->addWidget(m_playSpeed, 1, 2);
    layout->addWidget(m_playSharpen, 1, 3);

    layout->setColumnStretch(0, 10);

    frame->setLayout(layout);

    connect(m_viewManager, SIGNAL(outputLevelsChanged(float, float)),
	    this, SLOT(outputLevelsChanged(float, float)));

    connect(Preferences::getInstance(),
            SIGNAL(propertyChanged(PropertyContainer::PropertyName)),
            this,
            SLOT(preferenceChanged(PropertyContainer::PropertyName)));

    setupMenus();
    setupToolbars();

    statusBar()->addWidget(m_descriptionLabel);

    newSession();
}

MainWindow::~MainWindow()
{
    closeSession();
    delete m_playTarget;
    delete m_playSource;
    delete m_viewManager;
    Profiles::getInstance()->dump();
}

void
MainWindow::setupMenus()
{
    QAction *action = 0;
    QMenu *menu = 0;
    QToolBar *toolbar = 0;

    if (!m_mainMenusCreated) {
        m_rightButtonMenu = new QMenu();
    }

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

    if (!m_mainMenusCreated) {

        CommandHistory::getInstance()->registerMenu(m_rightButtonMenu);
        m_rightButtonMenu->addSeparator();

	menu = menuBar()->addMenu(tr("&File"));
        toolbar = addToolBar(tr("File Toolbar"));

        QIcon icon(":icons/filenew.png");
        icon.addFile(":icons/filenew-22.png");
	action = new QAction(icon, tr("&New Session"), this);
	action->setShortcut(tr("Ctrl+N"));
	action->setStatusTip(tr("Clear the current Sonic Visualiser session and start a new one"));
	connect(action, SIGNAL(triggered()), this, SLOT(newSession()));
	menu->addAction(action);
        toolbar->addAction(action);
	
        icon = QIcon(":icons/fileopen.png");
        icon.addFile(":icons/fileopen-22.png");

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

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

        icon = QIcon(":icons/filesave.png");
        icon.addFile(":icons/filesave-22.png");
	action = new QAction(icon, tr("&Save Session"), this);
	action->setShortcut(tr("Ctrl+S"));
	action->setStatusTip(tr("Save the current session into a Sonic Visualiser session file"));
	connect(action, SIGNAL(triggered()), this, SLOT(saveSession()));
	connect(this, SIGNAL(canSave(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
        toolbar->addAction(action);
	
        icon = QIcon(":icons/filesaveas.png");
        icon.addFile(":icons/filesaveas-22.png");
	action = new QAction(icon, tr("Save Session &As..."), this);
	action->setStatusTip(tr("Save the current session into a new Sonic Visualiser session file"));
	connect(action, SIGNAL(triggered()), this, SLOT(saveSessionAs()));
	menu->addAction(action);
        toolbar->addAction(action);

	menu->addSeparator();

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

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

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

	menu->addSeparator();

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

	action = new QAction(tr("Export Annotation Layer..."), this);
	action->setStatusTip(tr("Export layer data to a file"));
	connect(action, SIGNAL(triggered()), this, SLOT(exportLayer()));
	connect(this, SIGNAL(canExportLayer(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);

	menu->addSeparator();
        m_recentFilesMenu = menu->addMenu(tr("&Recent Files"));
        menu->addMenu(m_recentFilesMenu);
        setupRecentFilesMenu();
        connect(RecentFiles::getInstance(), SIGNAL(recentFilesChanged()),
                this, SLOT(setupRecentFilesMenu()));

	menu->addSeparator();
	action = new QAction(tr("&Preferences..."), this);
	action->setStatusTip(tr("Adjust the application preferences"));
	connect(action, SIGNAL(triggered()), this, SLOT(preferences()));
	menu->addAction(action);
	
	/*!!!
	menu->addSeparator();
	
	action = new QAction(tr("Play / Pause"), this);
	action->setShortcut(tr("Space"));
	action->setStatusTip(tr("Start or stop playback from the current position"));
	connect(action, SIGNAL(triggered()), this, SLOT(play()));
	menu->addAction(action);
	*/

	menu->addSeparator();
	action = new QAction(QIcon(":/icons/exit.png"),
			     tr("&Quit"), this);
	action->setShortcut(tr("Ctrl+Q"));
	connect(action, SIGNAL(triggered()), this, SLOT(close()));
	menu->addAction(action);

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

	menu->addSeparator();

	action = new QAction(QIcon(":/icons/editcut.png"),
			     tr("Cu&t"), this);
	action->setShortcut(tr("Ctrl+X"));
	connect(action, SIGNAL(triggered()), this, SLOT(cut()));
	connect(this, SIGNAL(canEditSelection(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
        m_rightButtonMenu->addAction(action);

	action = new QAction(QIcon(":/icons/editcopy.png"),
			     tr("&Copy"), this);
	action->setShortcut(tr("Ctrl+C"));
	connect(action, SIGNAL(triggered()), this, SLOT(copy()));
	connect(this, SIGNAL(canEditSelection(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
        m_rightButtonMenu->addAction(action);

	action = new QAction(QIcon(":/icons/editpaste.png"),
			     tr("&Paste"), this);
	action->setShortcut(tr("Ctrl+V"));
	connect(action, SIGNAL(triggered()), this, SLOT(paste()));
	connect(this, SIGNAL(canPaste(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
        m_rightButtonMenu->addAction(action);

	action = new QAction(tr("&Delete Selected Items"), this);
	action->setShortcut(tr("Del"));
	connect(action, SIGNAL(triggered()), this, SLOT(deleteSelected()));
	connect(this, SIGNAL(canEditSelection(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
        m_rightButtonMenu->addAction(action);

	menu->addSeparator();
        m_rightButtonMenu->addSeparator();
	
	action = new QAction(tr("Select &All"), this);
	action->setShortcut(tr("Ctrl+A"));
	connect(action, SIGNAL(triggered()), this, SLOT(selectAll()));
	connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
        m_rightButtonMenu->addAction(action);
	
	action = new QAction(tr("Select &Visible Range"), this);
	action->setShortcut(tr("Ctrl+Shift+A"));
	connect(action, SIGNAL(triggered()), this, SLOT(selectVisible()));
	connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
	
	action = new QAction(tr("Select to &Start"), this);
	action->setShortcut(tr("Shift+Left"));
	connect(action, SIGNAL(triggered()), this, SLOT(selectToStart()));
	connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
	
	action = new QAction(tr("Select to &End"), this);
	action->setShortcut(tr("Shift+Right"));
	connect(action, SIGNAL(triggered()), this, SLOT(selectToEnd()));
	connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);

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

	menu->addSeparator();

	action = new QAction(tr("&Insert Instant at Playback Position"), this);
	action->setShortcut(tr("Enter"));
	connect(action, SIGNAL(triggered()), this, SLOT(insertInstant()));
	connect(this, SIGNAL(canInsertInstant(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);

        // Laptop shortcut (no keypad Enter key)
        connect(new QShortcut(tr(";"), this), SIGNAL(activated()),
                this, SLOT(insertInstant()));

	menu = menuBar()->addMenu(tr("&View"));

        QActionGroup *overlayGroup = new QActionGroup(this);
        
        action = new QAction(tr("&No Text Overlays"), this);
	action->setShortcut(tr("0"));
	action->setStatusTip(tr("Show no texts for frame times, layer names etc"));
	connect(action, SIGNAL(triggered()), this, SLOT(showNoOverlays()));
        action->setCheckable(true);
        action->setChecked(false);
        overlayGroup->addAction(action);
	menu->addAction(action);
        
        action = new QAction(tr("Basic &Text Overlays"), this);
	action->setShortcut(tr("9"));
	action->setStatusTip(tr("Show texts for frame times etc, but not layer names etc"));
	connect(action, SIGNAL(triggered()), this, SLOT(showBasicOverlays()));
        action->setCheckable(true);
        action->setChecked(true);
        overlayGroup->addAction(action);
	menu->addAction(action);
        
        action = new QAction(tr("&All Text Overlays"), this);
	action->setShortcut(tr("8"));
	action->setStatusTip(tr("Show texts for frame times, layer names etc"));
	connect(action, SIGNAL(triggered()), this, SLOT(showAllTextOverlays()));
        action->setCheckable(true);
        action->setChecked(false);
        overlayGroup->addAction(action);
	menu->addAction(action);

	menu->addSeparator();
	
	action = new QAction(tr("Scroll &Left"), this);
	action->setShortcut(tr("Left"));
	action->setStatusTip(tr("Scroll the current pane to the left"));
	connect(action, SIGNAL(triggered()), this, SLOT(scrollLeft()));
	connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
	
	action = new QAction(tr("Scroll &Right"), this);
	action->setShortcut(tr("Right"));
	action->setStatusTip(tr("Scroll the current pane to the right"));
	connect(action, SIGNAL(triggered()), this, SLOT(scrollRight()));
	connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
	
	action = new QAction(tr("Jump Left"), this);
	action->setShortcut(tr("Ctrl+Left"));
	action->setStatusTip(tr("Scroll the current pane a big step to the left"));
	connect(action, SIGNAL(triggered()), this, SLOT(jumpLeft()));
	connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);
	
	action = new QAction(tr("Jump Right"), this);
	action->setShortcut(tr("Ctrl+Right"));
	action->setStatusTip(tr("Scroll the current pane a big step to the right"));
	connect(action, SIGNAL(triggered()), this, SLOT(jumpRight()));
	connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);

	menu->addSeparator();

	action = new QAction(QIcon(":/icons/zoom-in.png"),
			     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)));
	menu->addAction(action);
	
	action = new QAction(QIcon(":/icons/zoom-out.png"),
			     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)));
	menu->addAction(action);
	
	action = new QAction(tr("Restore &Default Zoom"), this);
	connect(action, SIGNAL(triggered()), this, SLOT(zoomDefault()));
	connect(this, SIGNAL(canZoom(bool)), action, SLOT(setEnabled(bool)));
	menu->addAction(action);

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

/*!!! This one doesn't work properly yet

	menu->addSeparator();

	action = new QAction(tr("Show &Layer Hierarchy"), this);
	action->setShortcut(tr("Alt+L"));
	connect(action, SIGNAL(triggered()), this, SLOT(showLayerTree()));
	menu->addAction(action);
*/
    }

    if (m_paneMenu) {
	m_paneActions.clear();
	m_paneMenu->clear();
    } else {
	m_paneMenu = menuBar()->addMenu(tr("&Pane"));
    }

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

    TransformFactory::TransformList transforms =
	TransformFactory::getInstance()->getAllTransforms();

    std::vector<QString> types =
        TransformFactory::getInstance()->getAllTransformTypes();

    std::map<QString, QMenu *> transformMenus;

    for (std::vector<QString>::iterator i = types.begin(); i != types.end(); ++i) {
        transformMenus[*i] = m_layerMenu->addMenu(*i);
        m_rightButtonLayerMenu->addMenu(transformMenus[*i]);
    }

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

	QString actionText = description;
        if (transforms[i].configurable) {
            actionText = QString("%1...").arg(actionText);
        }

	action = new QAction(actionText, this);
	connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
	m_layerTransformActions[action] = transforms[i].name;
	connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
	transformMenus[transforms[i].type]->addAction(action);
    }

    m_rightButtonLayerMenu->addSeparator();

    menu = m_paneMenu;

    action = new QAction(QIcon(":/icons/pane.png"), tr("Add &New Pane"), this);
    action->setShortcut(tr("Alt+N"));
    action->setStatusTip(tr("Add a new pane containing only a time ruler"));
    connect(action, SIGNAL(triggered()), this, SLOT(addPane()));
    connect(this, SIGNAL(canAddPane(bool)), action, SLOT(setEnabled(bool)));
    m_paneActions[action] = PaneConfiguration(LayerFactory::TimeRuler);
    menu->addAction(action);

    menu->addSeparator();

    menu = m_layerMenu;

    menu->addSeparator();

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

    for (LayerFactory::LayerTypeSet::iterator i = emptyLayerTypes.begin();
	 i != emptyLayerTypes.end(); ++i) {
	
	QIcon icon;
	QString mainText, tipText, channelText;
	LayerFactory::LayerType type = *i;
	QString name = LayerFactory::getInstance()->getLayerPresentationName(type);
	
	icon = QIcon(QString(":/icons/%1.png")
		     .arg(LayerFactory::getInstance()->getLayerIconName(type)));

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

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

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

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

    int channels = 1;
    if (getMainModel()) channels = getMainModel()->getChannelCount();

    if (channels < 1) channels = 1;

    LayerFactory::LayerType backgroundTypes[] = {
	LayerFactory::Waveform,
	LayerFactory::Spectrogram,
	LayerFactory::MelodicRangeSpectrogram,
	LayerFactory::PeakFrequencySpectrogram,
        LayerFactory::Spectrum
    };

    for (unsigned int i = 0;
	 i < sizeof(backgroundTypes)/sizeof(backgroundTypes[0]); ++i) {

	for (int menuType = 0; menuType <= 1; ++menuType) { // pane, layer

	    if (menuType == 0) menu = m_paneMenu;
	    else menu = m_layerMenu;

	    QMenu *submenu = 0;

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

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

		if (menuType == 1) {
		    if (isDefault) isOnly = true;
		    else continue;
		}

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

		switch (type) {

		case LayerFactory::Waveform:
		    icon = QIcon(":/icons/waveform.png");
		    mainText = tr("Add &Waveform");
		    if (menuType == 0) {
			shortcutText = tr("Alt+W");
			tipText = tr("Add a new pane showing a waveform view");
		    } else {
			tipText = tr("Add a new layer showing a waveform view");
		    }
		    mono = false;
		    break;
		    
		case LayerFactory::Spectrogram:
		    mainText = tr("Add &Spectrogram");
		    if (menuType == 0) {
			shortcutText = tr("Alt+S");
			tipText = tr("Add a new pane showing a dB spectrogram");
		    } else {
			tipText = tr("Add a new layer showing a dB spectrogram");
		    }
		    break;
		
		case LayerFactory::MelodicRangeSpectrogram:
		    mainText = tr("Add &Melodic Range Spectrogram");
		    if (menuType == 0) {
			shortcutText = tr("Alt+M");
			tipText = tr("Add a new pane showing a spectrogram set up for a pitch overview");
		    } else {
			tipText = tr("Add a new layer showing a spectrogram set up for a pitch overview");
		    }
		    break;
		
		case LayerFactory::PeakFrequencySpectrogram:
		    mainText = tr("Add &Peak Frequency Spectrogram");
		    if (menuType == 0) {
			shortcutText = tr("Alt+P");
			tipText = tr("Add a new pane showing a spectrogram set up for tracking frequencies");
		    } else {
			tipText = tr("Add a new layer showing a spectrogram set up for tracking frequencies");
		    }
		    break;

                case LayerFactory::Spectrum:
                    mainText = tr("Add Spectr&um");
		    if (menuType == 0) {
			shortcutText = tr("Alt+U");
			tipText = tr("Add a new pane showing a frequency spectrum");
		    } else {
			tipText = tr("Add a new layer showing a frequency spectrum");
		    }
                    break;

		default: break;
		}

		if (isOnly) {

		    action = new QAction(icon, mainText, this);
		    action->setShortcut(shortcutText);
		    action->setStatusTip(tipText);
		    if (menuType == 0) {
			connect(action, SIGNAL(triggered()), this, SLOT(addPane()));
			connect(this, SIGNAL(canAddPane(bool)), action, SLOT(setEnabled(bool)));
			m_paneActions[action] = PaneConfiguration(type);
		    } else {
			connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
			connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
			m_layerActions[action] = type;
		    }
		    menu->addAction(action);

		} else {

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

		    if (!submenu) {
			submenu = menu->addMenu(mainText);
		    }
		 
		    action = new QAction(icon, actionText, this);
		    if (isDefault) action->setShortcut(shortcutText);
		    action->setStatusTip(tipText);
		    if (menuType == 0) {
			connect(action, SIGNAL(triggered()), this, SLOT(addPane()));
			connect(this, SIGNAL(canAddPane(bool)), action, SLOT(setEnabled(bool)));
			m_paneActions[action] = PaneConfiguration(type, c - 1);
		    } else {
			connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
			connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
			m_layerActions[action] = type;
		    }
		    submenu->addAction(action);
		}
	    }
	}
    }

    menu = m_paneMenu;

    menu->addSeparator();

    action = new QAction(QIcon(":/icons/editdelete.png"), tr("&Delete Pane"), this);
    action->setShortcut(tr("Alt+D"));
    action->setStatusTip(tr("Delete the currently selected pane"));
    connect(action, SIGNAL(triggered()), this, SLOT(deleteCurrentPane()));
    connect(this, SIGNAL(canDeleteCurrentPane(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);

    menu = m_layerMenu;

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

    menu->addSeparator();

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

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

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

    action = new QAction(QIcon(":/icons/editdelete.png"), tr("&Delete Layer"), this);
    action->setShortcut(tr("Alt+Shift+D"));
    action->setStatusTip(tr("Delete the currently active layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(deleteCurrentLayer()));
    connect(this, SIGNAL(canDeleteCurrentLayer(bool)), action, SLOT(setEnabled(bool)));
    menu->addAction(action);
    m_rightButtonLayerMenu->addAction(action);

    if (!m_mainMenusCreated) {
	
	menu = menuBar()->addMenu(tr("&Help"));

	action = new QAction(tr("&Help Reference"), this); 
	action->setStatusTip(tr("Open the Sonic Visualiser reference manual")); 
	connect(action, SIGNAL(triggered()), this, SLOT(help()));
	menu->addAction(action);

	action = new QAction(tr("Sonic Visualiser on the &Web"), this); 
	action->setStatusTip(tr("Open the Sonic Visualiser website")); 
	connect(action, SIGNAL(triggered()), this, SLOT(website()));
	menu->addAction(action);

	action = new QAction(tr("&About Sonic Visualiser"), this); 
	action->setStatusTip(tr("Show information about Sonic Visualiser")); 
	connect(action, SIGNAL(triggered()), this, SLOT(about()));
	menu->addAction(action);
/*
	action = new QAction(tr("About &Qt"), this);
	action->setStatusTip(tr("Show information about Qt"));
	connect(action, SIGNAL(triggered()),
		QApplication::getInstance(), SLOT(aboutQt()));
	menu->addAction(action);
*/
    }

    m_mainMenusCreated = true;
}

void
MainWindow::setupRecentFilesMenu()
{
    m_recentFilesMenu->clear();
    std::vector<QString> files = RecentFiles::getInstance()->getRecentFiles();
    for (size_t i = 0; i < files.size(); ++i) {
	QAction *action = new QAction(files[i], this);
	connect(action, SIGNAL(triggered()), this, SLOT(openRecentFile()));
	m_recentFilesMenu->addAction(action);
    }
}

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

//    std::cerr << "MainWindow::setupExistingLayersMenu" << std::endl;

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

    std::vector<Layer *> orderedLayers;
    std::set<Layer *> observedLayers;

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

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

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

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

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

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

    std::map<QString, int> observedNames;

    for (int i = 0; i < orderedLayers.size(); ++i) {
	
	QString name = orderedLayers[i]->getLayerPresentationName();
	int n = ++observedNames[name];
	if (n > 1) name = QString("%1 <%2>").arg(name).arg(n);

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

	m_existingLayersMenu->addAction(action);
    }
}

void
MainWindow::setupToolbars()
{
    QToolBar *toolbar = addToolBar(tr("Transport Toolbar"));

    QAction *action = toolbar->addAction(QIcon(":/icons/rewind-start.png"),
					 tr("Rewind to Start"));
    action->setShortcut(tr("Home"));
    action->setStatusTip(tr("Rewind to the start"));
    connect(action, SIGNAL(triggered()), this, SLOT(rewindStart()));
    connect(this, SIGNAL(canPlay(bool)), action, SLOT(setEnabled(bool)));

    action = toolbar->addAction(QIcon(":/icons/rewind.png"),
				tr("Rewind"));
    action->setShortcut(tr("PageUp"));
    action->setStatusTip(tr("Rewind to the previous time instant in the current layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(rewind()));
    connect(this, SIGNAL(canRewind(bool)), action, SLOT(setEnabled(bool)));

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

    action = toolbar->addAction(QIcon(":/icons/ffwd.png"),
				tr("Fast Forward"));
    action->setShortcut(tr("PageDown"));
    action->setStatusTip(tr("Fast forward to the next time instant in the current layer"));
    connect(action, SIGNAL(triggered()), this, SLOT(ffwd()));
    connect(this, SIGNAL(canFfwd(bool)), action, SLOT(setEnabled(bool)));

    action = toolbar->addAction(QIcon(":/icons/ffwd-end.png"),
				tr("Fast Forward to End"));
    action->setShortcut(tr("End"));
    action->setStatusTip(tr("Fast-forward to the end"));
    connect(action, SIGNAL(triggered()), this, SLOT(ffwdEnd()));
    connect(this, SIGNAL(canPlay(bool)), action, SLOT(setEnabled(bool)));

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

    action = toolbar->addAction(QIcon(":/icons/playselection.png"),
				tr("Constrain Playback to Selection"));
    action->setCheckable(true);
    action->setChecked(m_viewManager->getPlaySelectionMode());
    action->setShortcut(tr("s"));
    action->setStatusTip(tr("Constrain playback to the selected area"));
    connect(action, SIGNAL(triggered()), this, SLOT(playSelectionToggled()));
    connect(this, SIGNAL(canPlaySelection(bool)), action, SLOT(setEnabled(bool)));

    action = toolbar->addAction(QIcon(":/icons/playloop.png"),
				tr("Loop Playback"));
    action->setCheckable(true);
    action->setChecked(m_viewManager->getPlayLoopMode());
    action->setShortcut(tr("l"));
    action->setStatusTip(tr("Loop playback"));
    connect(action, SIGNAL(triggered()), this, SLOT(playLoopToggled()));
    connect(this, SIGNAL(canPlay(bool)), action, SLOT(setEnabled(bool)));

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

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

    action = toolbar->addAction(QIcon(":/icons/navigate.png"),
				tr("Navigate"));
    action->setCheckable(true);
    action->setChecked(true);
    action->setShortcut(tr("1"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolNavigateSelected()));
    group->addAction(action);
    m_toolActions[ViewManager::NavigateMode] = action;

    action = toolbar->addAction(QIcon(":/icons/select.png"),
				tr("Select"));
    action->setCheckable(true);
    action->setShortcut(tr("2"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolSelectSelected()));
    group->addAction(action);
    m_toolActions[ViewManager::SelectMode] = action;

    action = toolbar->addAction(QIcon(":/icons/move.png"),
				tr("Edit"));
    action->setCheckable(true);
    action->setShortcut(tr("3"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolEditSelected()));
    connect(this, SIGNAL(canEditLayer(bool)), action, SLOT(setEnabled(bool)));
    group->addAction(action);
    m_toolActions[ViewManager::EditMode] = action;

    action = toolbar->addAction(QIcon(":/icons/draw.png"),
				tr("Draw"));
    action->setCheckable(true);
    action->setShortcut(tr("4"));
    connect(action, SIGNAL(triggered()), this, SLOT(toolDrawSelected()));
    connect(this, SIGNAL(canEditLayer(bool)), action, SLOT(setEnabled(bool)));
    group->addAction(action);
    m_toolActions[ViewManager::DrawMode] = action;

//    action = toolbar->addAction(QIcon(":/icons/text.png"),
//				tr("Text"));
//    action->setCheckable(true);
//    action->setShortcut(tr("5"));
//    connect(action, SIGNAL(triggered()), this, SLOT(toolTextSelected()));
//    group->addAction(action);
//    m_toolActions[ViewManager::TextMode] = action;

    toolNavigateSelected();
}

void
MainWindow::updateMenuStates()
{
    bool haveCurrentPane =
	(m_paneStack &&
	 (m_paneStack->getCurrentPane() != 0));
    bool haveCurrentLayer =
	(haveCurrentPane &&
	 (m_paneStack->getCurrentPane()->getSelectedLayer()));
    bool haveMainModel =
	(getMainModel() != 0);
    bool havePlayTarget =
	(m_playTarget != 0);
    bool haveSelection = 
	(m_viewManager &&
	 !m_viewManager->getSelections().empty());
    bool haveCurrentEditableLayer =
	(haveCurrentLayer &&
	 m_paneStack->getCurrentPane()->getSelectedLayer()->
	 isLayerEditable());
    bool haveCurrentTimeInstantsLayer = 
	(haveCurrentLayer &&
	 dynamic_cast<TimeInstantLayer *>
	 (m_paneStack->getCurrentPane()->getSelectedLayer()));
    bool haveCurrentTimeValueLayer = 
	(haveCurrentLayer &&
	 dynamic_cast<TimeValueLayer *>
	 (m_paneStack->getCurrentPane()->getSelectedLayer()));
    bool haveCurrentColour3DPlot =
        (haveCurrentLayer &&
         dynamic_cast<Colour3DPlotLayer *>
         (m_paneStack->getCurrentPane()->getSelectedLayer()));
    bool haveClipboardContents =
        (m_viewManager &&
         !m_viewManager->getClipboard().empty());

    emit canAddPane(haveMainModel);
    emit canDeleteCurrentPane(haveCurrentPane);
    emit canZoom(haveMainModel && haveCurrentPane);
    emit canScroll(haveMainModel && haveCurrentPane);
    emit canAddLayer(haveMainModel && haveCurrentPane);
    emit canImportMoreAudio(haveMainModel);
    emit canImportLayer(haveMainModel && haveCurrentPane);
    emit canExportAudio(haveMainModel);
    emit canExportLayer(haveMainModel &&
                        (haveCurrentEditableLayer || haveCurrentColour3DPlot));
    emit canDeleteCurrentLayer(haveCurrentLayer);
    emit canRenameLayer(haveCurrentLayer);
    emit canEditLayer(haveCurrentEditableLayer);
    emit canSelect(haveMainModel && haveCurrentPane);
    emit canPlay(/*!!! haveMainModel && */ havePlayTarget);
    emit canFfwd(haveCurrentTimeInstantsLayer || haveCurrentTimeValueLayer);
    emit canRewind(haveCurrentTimeInstantsLayer || haveCurrentTimeValueLayer);
    emit canPaste(haveCurrentEditableLayer && haveClipboardContents);
    emit canInsertInstant(haveCurrentPane);
    emit canPlaySelection(haveMainModel && havePlayTarget && haveSelection);
    emit canClearSelection(haveSelection);
    emit canEditSelection(haveSelection && haveCurrentEditableLayer);
    emit canSave(m_sessionFile != "" && m_documentModified);
}

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

    QString description;

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

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

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

    m_descriptionLabel->setText(description);
}

void
MainWindow::documentModified()
{
//    std::cerr << "MainWindow::documentModified" << std::endl;

    if (!m_documentModified) {
	setWindowTitle(tr("%1 (modified)").arg(windowTitle()));
    }

    m_documentModified = true;
    updateMenuStates();
}

void
MainWindow::documentRestored()
{
//    std::cerr << "MainWindow::documentRestored" << std::endl;

    if (m_documentModified) {
	QString wt(windowTitle());
	wt.replace(tr(" (modified)"), "");
	setWindowTitle(wt);
    }

    m_documentModified = false;
    updateMenuStates();
}

void
MainWindow::playLoopToggled()
{
    QAction *action = dynamic_cast<QAction *>(sender());
    
    if (action) {
	m_viewManager->setPlayLoopMode(action->isChecked());
    } else {
	m_viewManager->setPlayLoopMode(!m_viewManager->getPlayLoopMode());
    }
}

void
MainWindow::playSelectionToggled()
{
    QAction *action = dynamic_cast<QAction *>(sender());
    
    if (action) {
	m_viewManager->setPlaySelectionMode(action->isChecked());
    } else {
	m_viewManager->setPlaySelectionMode(!m_viewManager->getPlaySelectionMode());
    }
}

void
MainWindow::currentPaneChanged(Pane *)
{
    updateMenuStates();
}

void
MainWindow::currentLayerChanged(Pane *, Layer *)
{
    updateMenuStates();
}

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

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

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

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

//void
//MainWindow::toolTextSelected()
//{
//    m_viewManager->setToolMode(ViewManager::TextMode);
//}

void
MainWindow::selectAll()
{
    if (!getMainModel()) return;
    m_viewManager->setSelection(Selection(getMainModel()->getStartFrame(),
					  getMainModel()->getEndFrame()));
}

void
MainWindow::selectToStart()
{
    if (!getMainModel()) return;
    m_viewManager->setSelection(Selection(getMainModel()->getStartFrame(),
					  m_viewManager->getGlobalCentreFrame()));
}

void
MainWindow::selectToEnd()
{
    if (!getMainModel()) return;
    m_viewManager->setSelection(Selection(m_viewManager->getGlobalCentreFrame(),
					  getMainModel()->getEndFrame()));
}

void
MainWindow::selectVisible()
{
    Model *model = getMainModel();
    if (!model) return;

    Pane *currentPane = m_paneStack->getCurrentPane();
    if (!currentPane) return;

    size_t startFrame, endFrame;

    if (currentPane->getStartFrame() < 0) startFrame = 0;
    else startFrame = currentPane->getStartFrame();

    if (currentPane->getEndFrame() > model->getEndFrame()) endFrame = model->getEndFrame();
    else endFrame = currentPane->getEndFrame();

    m_viewManager->setSelection(Selection(startFrame, endFrame));
}

void
MainWindow::clearSelection()
{
    m_viewManager->clearSelections();
}

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

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

    Clipboard &clipboard = m_viewManager->getClipboard();
    clipboard.clear();

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

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

    for (MultiSelection::SelectionList::iterator i = selections.begin();
         i != selections.end(); ++i) {
        layer->copy(*i, clipboard);
        layer->deleteSelection(*i);
    }

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

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

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

    Clipboard &clipboard = m_viewManager->getClipboard();
    clipboard.clear();

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

    for (MultiSelection::SelectionList::iterator i = selections.begin();
         i != selections.end(); ++i) {
        layer->copy(*i, clipboard);
    }
}

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

    //!!! if we have no current layer, we should create one of the most
    // appropriate type

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

    Clipboard &clipboard = m_viewManager->getClipboard();
    Clipboard::PointList contents = clipboard.getPoints();
/*
    long minFrame = 0;
    bool have = false;
    for (int i = 0; i < contents.size(); ++i) {
        if (!contents[i].haveFrame()) continue;
        if (!have || contents[i].getFrame() < minFrame) {
            minFrame = contents[i].getFrame();
            have = true;
        }
    }

    long frameOffset = long(m_viewManager->getGlobalCentreFrame()) - minFrame;

    layer->paste(clipboard, frameOffset);
*/
    layer->paste(clipboard, 0, true);
}

void
MainWindow::deleteSelected()
{
    if (m_paneStack->getCurrentPane() &&
	m_paneStack->getCurrentPane()->getSelectedLayer()) {

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

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

	    m_paneStack->getCurrentPane()->getSelectedLayer()->deleteSelection(*i);
	}
    }
}

void
MainWindow::insertInstant()
{
    int frame = m_viewManager->getPlaybackFrame();
            
    Pane *pane = m_paneStack->getCurrentPane();
    if (!pane) {
        return;
    }

    Layer *layer = dynamic_cast<TimeInstantLayer *>
        (pane->getSelectedLayer());

    if (!layer) {
        for (int i = pane->getLayerCount(); i > 0; --i) {
            layer = dynamic_cast<TimeInstantLayer *>(pane->getLayer(i - 1));
            if (layer) break;
        }

        if (!layer) {
            CommandHistory::getInstance()->startCompoundOperation
                (tr("Add Point"), true);
            layer = m_document->createEmptyLayer(LayerFactory::TimeInstants);
            if (layer) {
                m_document->addLayerToView(pane, layer);
                m_paneStack->setCurrentLayer(pane, layer);
            }
            CommandHistory::getInstance()->endCompoundOperation();
        }
    }

    if (layer) {
    
        Model *model = layer->getModel();
        SparseOneDimensionalModel *sodm = dynamic_cast<SparseOneDimensionalModel *>
            (model);

        if (sodm) {
            SparseOneDimensionalModel::Point point
                (frame, QString("%1").arg(sodm->getPointCount() + 1));
            CommandHistory::getInstance()->addCommand
                (new SparseOneDimensionalModel::AddPointCommand(sodm, point,
                                                                tr("Add Points")),
                 true, true); // bundled
        }
    }
}

void
MainWindow::importAudio()
{
    QString orig = m_audioFile;

//    std::cerr << "orig = " << orig.toStdString() << std::endl;
    
    if (orig == "") orig = ".";

    QString path = QFileDialog::getOpenFileName
	(this, tr("Select an audio file"), orig,
	 tr("Audio files (%1)\nAll files (*.*)")
	 .arg(AudioFileReaderFactory::getKnownExtensions()));

    if (path != "") {
	if (!openAudioFile(path, ReplaceMainModel)) {
	    QMessageBox::critical(this, tr("Failed to open file"),
				  tr("Audio file \"%1\" could not be opened").arg(path));
	}
    }
}

void
MainWindow::importMoreAudio()
{
    QString orig = m_audioFile;

//    std::cerr << "orig = " << orig.toStdString() << std::endl;
    
    if (orig == "") orig = ".";

    QString path = QFileDialog::getOpenFileName
	(this, tr("Select an audio file"), orig,
	 tr("Audio files (%1)\nAll files (*.*)")
	 .arg(AudioFileReaderFactory::getKnownExtensions()));

    if (path != "") {
	if (!openAudioFile(path, CreateAdditionalModel)) {
	    QMessageBox::critical(this, tr("Failed to open file"),
				  tr("Audio file \"%1\" could not be opened").arg(path));
	}
    }
}

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

    QString path = QFileDialog::getSaveFileName
	(this, tr("Select a file to export to"), ".",
	 tr("WAV audio files (*.wav)\nAll files (*.*)"));
    
    if (path == "") return;

    if (!path.endsWith(".wav")) path = path + ".wav";

    bool ok = false;
    QString error;

    WavFileWriter *writer = 0;
    MultiSelection ms = m_viewManager->getSelection();
    MultiSelection::SelectionList selections = m_viewManager->getSelections();

    bool multiple = false;

    if (selections.empty()) {

	writer = new WavFileWriter(path, getMainModel()->getSampleRate(),
				   getMainModel(), 0);
    
    } else if (selections.size() == 1) {

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

	    writer = new WavFileWriter(path, getMainModel()->getSampleRate(),
				       getMainModel(), &ms);

	} else {

	    writer = new WavFileWriter(path, getMainModel()->getSampleRate(),
				       getMainModel(), 0);
	}
    } else {

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

	bool ok = false;
	QString item = ListInputDialog::getItem
	    (this, tr("Select region to export"),
	     tr("Multiple regions of the original audio file are selected.\nWhat do you want to export?"),
	     items, 0, &ok);
	    
	if (!ok || item.isEmpty()) return;

	if (item == items[0]) {

	    writer = new WavFileWriter(path, getMainModel()->getSampleRate(),
				       getMainModel(), &ms);

	} else if (item == items[2]) {

	    writer = new WavFileWriter(path, getMainModel()->getSampleRate(),
				       getMainModel(), 0);

	} else {

            multiple = true;

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

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

		MultiSelection subms;
		subms.setSelection(*i);

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

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

		WavFileWriter subwriter(subpath, getMainModel()->getSampleRate(),
					getMainModel(), &subms);
		subwriter.write();
		ok = subwriter.isOK();

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

    if (writer) {
	writer->write();
	ok = writer->isOK();
	error = writer->getError();
	delete writer;
    }

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

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

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

    QString path = QFileDialog::getOpenFileName
	(this, tr("Select file"), ".",
	 tr("All supported files (%1)\nSonic Visualiser Layer XML files (*.svl)\nComma-separated data files (*.csv)\nSpace-separated .lab files (*.lab)\nMIDI files (*.mid)\nText files (*.txt)\nAll files (*.*)").arg(DataFileReaderFactory::getKnownExtensions()));

    if (path != "") {

        if (!openLayerFile(path)) {
            QMessageBox::critical(this, tr("Failed to open file"),
                                  tr("File %1 could not be opened.").arg(path));
            return;
        }
    }
}

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

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

    if (path.endsWith(".svl") || path.endsWith(".xml")) {

        PaneCallback callback(this);
        QFile file(path);
        
        if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
            std::cerr << "ERROR: MainWindow::openLayerFile("
                      << path.toStdString()
                      << "): Failed to open file for reading" << std::endl;
            return false;
        }
        
        SVFileReader reader(m_document, callback);
        reader.setCurrentPane(pane);
        
        QXmlInputSource inputSource(&file);
        reader.parse(inputSource);
        
        if (!reader.isOK()) {
            std::cerr << "ERROR: MainWindow::openLayerFile("
                      << path.toStdString()
                      << "): Failed to read XML file: "
                      << reader.getErrorString().toStdString() << std::endl;
            return false;
        }

        RecentFiles::getInstance()->addFile(path);
        return true;
        
    } else {
        
        Model *model = DataFileReaderFactory::load(path, getMainModel()->getSampleRate());
        
        if (model) {
            Layer *newLayer = m_document->createImportedLayer(model);
            if (newLayer) {
                m_document->addLayerToView(pane, newLayer);
                RecentFiles::getInstance()->addFile(path);
                return true;
            }
        }
    }

    return false;
}

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

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

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

    QString path = QFileDialog::getSaveFileName
	(this, tr("Select a file to export to"), ".",
	 tr("Sonic Visualiser Layer XML files (*.svl)\nComma-separated data files (*.csv)\nText files (*.txt)\nAll files (*.*)"));

    if (path == "") return;

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

    QString error;

    if (path.endsWith(".xml") || path.endsWith(".svl")) {

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

            model->toXml(out, "    ");

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

            layer->toXml(out, "    ");

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

    } else {

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

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

    if (error != "") {
        QMessageBox::critical(this, tr("Failed to write file"), error);
    } else {
        RecentFiles::getInstance()->addFile(path);
    }
}

bool
MainWindow::openAudioFile(QString path, AudioFileOpenMode mode)
{
    if (!(QFileInfo(path).exists() &&
	  QFileInfo(path).isFile() &&
	  QFileInfo(path).isReadable())) {
	return false;
    }

    WaveFileModel *newModel = new WaveFileModel(path);

    if (!newModel->isOK()) {
	delete newModel;
	return false;
    }

    bool setAsMain = true;
    static bool prevSetAsMain = true;

    if (mode == CreateAdditionalModel) setAsMain = false;
    else if (mode == AskUser) {
        if (m_document->getMainModel()) {

            QStringList items;
            items << tr("Replace the existing main waveform")
                  << tr("Load this file into a new waveform pane");

            bool ok = false;
            QString item = ListInputDialog::getItem
                (this, tr("Select target for import"),
                 tr("You already have an audio waveform loaded.\nWhat would you like to do with the new audio file?"),
                 items, prevSetAsMain ? 0 : 1, &ok);
            
            if (!ok || item.isEmpty()) {
                delete newModel;
                return false;
            }
            
            setAsMain = (item == items[0]);
            prevSetAsMain = setAsMain;
        }
    }

    if (setAsMain) {

        Model *prevMain = getMainModel();
        if (prevMain) m_playSource->removeModel(prevMain);

	PlayParameterRepository::getInstance()->clear();

	// The clear() call will have removed the parameters for the
	// main model.  Re-add them with the new one.
	PlayParameterRepository::getInstance()->addModel(newModel);

	m_document->setMainModel(newModel);
	setupMenus();

	if (m_sessionFile == "") {
	    setWindowTitle(tr("Sonic Visualiser: %1")
			   .arg(QFileInfo(path).fileName()));
	    CommandHistory::getInstance()->clear();
	    CommandHistory::getInstance()->documentSaved();
	    m_documentModified = false;
	} else {
	    setWindowTitle(tr("Sonic Visualiser: %1 [%2]")
			   .arg(QFileInfo(m_sessionFile).fileName())
			   .arg(QFileInfo(path).fileName()));
	    if (m_documentModified) {
		m_documentModified = false;
		documentModified(); // so as to restore "(modified)" window title
	    }
	}

	m_audioFile = path;

    } else { // !setAsMain

	CommandHistory::getInstance()->startCompoundOperation
	    (tr("Import \"%1\"").arg(QFileInfo(path).fileName()), true);

	m_document->addImportedModel(newModel);

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

	Pane *pane = command->getPane();

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

	m_document->addLayerToView(pane, m_timeRulerLayer);

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

	if (newLayer) {
	    m_document->addLayerToView(pane, newLayer);
	}
	
	CommandHistory::getInstance()->endCompoundOperation();
    }

    updateMenuStates();
    RecentFiles::getInstance()->addFile(path);

    return true;
}

void
MainWindow::createPlayTarget()
{
    if (m_playTarget) return;

    m_playTarget = AudioTargetFactory::createCallbackTarget(m_playSource);
    if (!m_playTarget) {
	QMessageBox::warning
	    (this, tr("Couldn't open audio device"),
	     tr("Could not open an audio device for playback.\nAudio playback will not be available during this session.\n"),
	     QMessageBox::Ok, 0);
    }
    connect(m_fader, SIGNAL(valueChanged(float)),
	    m_playTarget, SLOT(setOutputGain(float)));
}

WaveFileModel *
MainWindow::getMainModel()
{
    if (!m_document) return 0;
    return m_document->getMainModel();
}

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

    closeSession();
    createDocument();

    Pane *pane = m_paneStack->addPane();

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

    m_document->addLayerToView(pane, m_timeRulerLayer);

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

    m_panner->registerView(pane);

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

void
MainWindow::createDocument()
{
    m_document = new Document;

    connect(m_document, SIGNAL(layerAdded(Layer *)),
	    this, SLOT(layerAdded(Layer *)));
    connect(m_document, SIGNAL(layerRemoved(Layer *)),
	    this, SLOT(layerRemoved(Layer *)));
    connect(m_document, SIGNAL(layerAboutToBeDeleted(Layer *)),
	    this, SLOT(layerAboutToBeDeleted(Layer *)));
    connect(m_document, SIGNAL(layerInAView(Layer *, bool)),
	    this, SLOT(layerInAView(Layer *, bool)));

    connect(m_document, SIGNAL(modelAdded(Model *)),
	    this, SLOT(modelAdded(Model *)));
    connect(m_document, SIGNAL(mainModelChanged(WaveFileModel *)),
	    this, SLOT(mainModelChanged(WaveFileModel *)));
    connect(m_document, SIGNAL(modelAboutToBeDeleted(Model *)),
	    this, SLOT(modelAboutToBeDeleted(Model *)));

    connect(m_document, SIGNAL(modelGenerationFailed(QString)),
            this, SLOT(modelGenerationFailed(QString)));
    connect(m_document, SIGNAL(modelRegenerationFailed(QString)),
            this, SLOT(modelRegenerationFailed(QString)));
}

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

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

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

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

	m_panner->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_panner->unregisterView(pane);
	m_paneStack->deletePane(pane);
    }

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

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

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

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

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

    QString path = QFileDialog::getOpenFileName
	(this, tr("Select a session file"), orig,
	 tr("Sonic Visualiser session files (*.sv)\nAll files (*.*)"));

    if (path.isEmpty()) return;

    if (!(QFileInfo(path).exists() &&
	  QFileInfo(path).isFile() &&
	  QFileInfo(path).isReadable())) {
	QMessageBox::critical(this, tr("Failed to open file"),
			      tr("File \"%1\" does not exist or is not a readable file").arg(path));
	return;
    }

    if (!openSessionFile(path)) {
	QMessageBox::critical(this, tr("Failed to open file"),
			      tr("Session file \"%1\" could not be opened").arg(path));
    }
}

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

    bool canImportLayer = (getMainModel() != 0 &&
                           m_paneStack != 0 &&
                           m_paneStack->getCurrentPane() != 0);

    QString importSpec;

    if (canImportLayer) {
        importSpec = tr("All supported files (*.sv %1 %2)\nSonic Visualiser session files (*.sv)\nAudio files (%1)\nLayer files (%2)\nAll files (*.*)")
            .arg(AudioFileReaderFactory::getKnownExtensions())
            .arg(DataFileReaderFactory::getKnownExtensions());
    } else {
        importSpec = tr("All supported files (*.sv %1)\nSonic Visualiser session files (*.sv)\nAudio files (%1)\nAll files (*.*)")
            .arg(AudioFileReaderFactory::getKnownExtensions());
    }

    QString path = QFileDialog::getOpenFileName
	(this, tr("Select a file to open"), orig, importSpec);

    if (path.isEmpty()) return;

    if (!(QFileInfo(path).exists() &&
	  QFileInfo(path).isFile() &&
	  QFileInfo(path).isReadable())) {
	QMessageBox::critical(this, tr("Failed to open file"),
			      tr("File \"%1\" does not exist or is not a readable file").arg(path));
	return;
    }

    if (path.endsWith(".sv")) {

        if (!checkSaveModified()) return;

        if (!openSessionFile(path)) {
            QMessageBox::critical(this, tr("Failed to open file"),
                                  tr("Session file \"%1\" could not be opened").arg(path));
        }

    } else {

        if (!openAudioFile(path, AskUser)) {

            if (!canImportLayer || !openLayerFile(path)) {

                QMessageBox::critical(this, tr("Failed to open file"),
                                      tr("File \"%1\" could not be opened").arg(path));
            }
        }
    }
}

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

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

    if (path.endsWith("sv")) {

        if (!checkSaveModified()) return ;

        if (!openSessionFile(path)) {
            QMessageBox::critical(this, tr("Failed to open file"),
                                  tr("Session file \"%1\" could not be opened").arg(path));
        }

    } else {

        if (!openAudioFile(path, AskUser)) {

            bool canImportLayer = (getMainModel() != 0 &&
                                   m_paneStack != 0 &&
                                   m_paneStack->getCurrentPane() != 0);

            if (!canImportLayer || !openLayerFile(path)) {

                QMessageBox::critical(this, tr("Failed to open file"),
                                      tr("File \"%1\" could not be opened").arg(path));
            }
        }
    }
}

bool
MainWindow::openSomeFile(QString path)
{
    if (openAudioFile(path)) {
	return true;
    } else if (openSessionFile(path)) {
	return true;
    } else {
	return false;
    }
}

bool
MainWindow::openSessionFile(QString path)
{
    BZipFileDevice bzFile(path);
    if (!bzFile.open(QIODevice::ReadOnly)) {
        std::cerr << "Failed to open session file \"" << path.toStdString()
                  << "\": " << bzFile.errorString().toStdString() << std::endl;
        return false;
    }

    QString error;
    closeSession();
    createDocument();

    PaneCallback callback(this);
    m_viewManager->clearSelections();

    SVFileReader reader(m_document, callback);
    QXmlInputSource inputSource(&bzFile);
    reader.parse(inputSource);
    
    if (!reader.isOK()) {
        error = tr("SV XML file read error:\n%1").arg(reader.getErrorString());
    }
    
    bzFile.close();

    bool ok = (error == "");
    
    if (ok) {
	setWindowTitle(tr("Sonic Visualiser: %1")
		       .arg(QFileInfo(path).fileName()));
	m_sessionFile = path;
	setupMenus();
	CommandHistory::getInstance()->clear();
	CommandHistory::getInstance()->documentSaved();
	m_documentModified = false;
	updateMenuStates();
        RecentFiles::getInstance()->addFile(path);
    } else {
	setWindowTitle(tr("Sonic Visualiser"));
    }

    return ok;
}

void
MainWindow::closeEvent(QCloseEvent *e)
{
    if (!checkSaveModified()) {
	e->ignore();
	return;
    }

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

    e->accept();
    return;
}

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

        QString fname = QString("tmp-%1-%2.sv")
            .arg(QDateTime::currentDateTime().toString("yyyyMMddhhmmsszzz"))
            .arg(QProcess().pid());
        QString fpath = QDir(svDir).filePath(fname);
        if (saveSessionFile(fpath)) {
            RecentFiles::getInstance()->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);

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

    // else cancel
    return false;
}

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

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

    QString path;
    bool good = false;

    while (!good) {

	path = QFileDialog::getSaveFileName
	    (this, tr("Select a file to save to"), orig,
	     tr("Sonic Visualiser session files (*.sv)\nAll files (*.*)"), 0,
	     QFileDialog::DontConfirmOverwrite); // we'll do that

	if (path.isEmpty()) return;

	if (!path.endsWith(".sv")) path = path + ".sv";

	QFileInfo fi(path);

	if (fi.isDir()) {
	    QMessageBox::critical(this, tr("Directory selected"),
				  tr("File \"%1\" is a directory").arg(path));
	    continue;
	}

	if (fi.exists()) {
	    if (QMessageBox::question(this, tr("File exists"),
				      tr("The file \"%1\" already exists.\nDo you want to overwrite it?").arg(path),
				      QMessageBox::Ok,
				      QMessageBox::Cancel) == QMessageBox::Ok) {
		good = true;
	    } else {
		continue;
	    }
	}

	good = true;
    }

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

bool
MainWindow::saveSessionFile(QString path)
{
    BZipFileDevice bzFile(path);
    if (!bzFile.open(QIODevice::WriteOnly)) {
        std::cerr << "Failed to open session file \"" << path.toStdString()
                  << "\" for writing: "
                  << bzFile.errorString().toStdString() << std::endl;
        return false;
    }

    QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));

    QTextStream out(&bzFile);
    toXml(out);
    out.flush();

    QApplication::restoreOverrideCursor();

    if (bzFile.errorString() != "") {
	QMessageBox::critical(this, tr("Failed to write file"),
			      tr("Failed to write to file \"%1\": %2")
			      .arg(path).arg(bzFile.errorString()));
        bzFile.close();
	return false;
    }

    bzFile.close();
    return true;
}

void
MainWindow::toXml(QTextStream &out)
{
    QString indent("  ");

    out << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
    out << "<!DOCTYPE sonic-visualiser>\n";
    out << "<sv>\n";

    m_document->toXml(out, "", "");

    out << "<display>\n";

    out << QString("  <window width=\"%1\" height=\"%2\"/>\n")
	.arg(width()).arg(height());

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

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

	if (pane) {
            pane->toXml(out, indent);
	}
    }

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

    m_viewManager->getSelection().toXml(out);

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

Pane *
MainWindow::addPaneToStack()
{
    AddPaneCommand *command = new AddPaneCommand(this);
    CommandHistory::getInstance()->addCommand(command);
    return command->getPane();
}

void
MainWindow::zoomIn()
{
    Pane *currentPane = m_paneStack->getCurrentPane();
    if (currentPane) currentPane->zoom(true);
}

void
MainWindow::zoomOut()
{
    Pane *currentPane = m_paneStack->getCurrentPane();
    if (currentPane) currentPane->zoom(false);
}

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

    Model *model = getMainModel();
    if (!model) return;
    
    size_t start = model->getStartFrame();
    size_t end = model->getEndFrame();
    size_t pixels = currentPane->width();
    size_t zoomLevel = (end - start) / pixels;

    currentPane->setZoomLevel(zoomLevel);
    currentPane->setStartFrame(start);
}

void
MainWindow::zoomDefault()
{
    Pane *currentPane = m_paneStack->getCurrentPane();
    if (currentPane) currentPane->setZoomLevel(1024);
}

void
MainWindow::scrollLeft()
{
    Pane *currentPane = m_paneStack->getCurrentPane();
    if (currentPane) currentPane->scroll(false, false);
}

void
MainWindow::jumpLeft()
{
    Pane *currentPane = m_paneStack->getCurrentPane();
    if (currentPane) currentPane->scroll(false, true);
}

void
MainWindow::scrollRight()
{
    Pane *currentPane = m_paneStack->getCurrentPane();
    if (currentPane) currentPane->scroll(true, false);
}

void
MainWindow::jumpRight()
{
    Pane *currentPane = m_paneStack->getCurrentPane();
    if (currentPane) currentPane->scroll(true, true);
}

void
MainWindow::showNoOverlays()
{
    m_viewManager->setOverlayMode(ViewManager::NoOverlays);
}

void
MainWindow::showBasicOverlays()
{
    m_viewManager->setOverlayMode(ViewManager::BasicOverlays);
}

void
MainWindow::showAllTextOverlays()
{
    m_viewManager->setOverlayMode(ViewManager::AllOverlays);
}

void
MainWindow::toggleZoomWheels()
{
    if (m_viewManager->getZoomWheelsEnabled()) {
        m_viewManager->setZoomWheelsEnabled(false);
    } else {
        m_viewManager->setZoomWheelsEnabled(true);
    }
}

void
MainWindow::play()
{
    if (m_playSource->isPlaying()) {
	m_playSource->stop();
    } else {
	m_playSource->play(m_viewManager->getPlaybackFrame());
    }
}

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

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

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

    Layer *layer = pane->getSelectedLayer();

    if (!dynamic_cast<TimeInstantLayer *>(layer) &&
        !dynamic_cast<TimeValueLayer *>(layer)) return;

    size_t resolution = 0;
    if (!layer->snapToFeatureFrame(pane, frame, resolution, Layer::SnapRight)) {
        frame = getMainModel()->getEndFrame();
    }
    
    m_viewManager->setPlaybackFrame(frame);
}

void
MainWindow::ffwdEnd()
{
    if (!getMainModel()) return;
    m_viewManager->setPlaybackFrame(getMainModel()->getEndFrame());
}

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

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

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

    Layer *layer = pane->getSelectedLayer();

    if (!dynamic_cast<TimeInstantLayer *>(layer) &&
        !dynamic_cast<TimeValueLayer *>(layer)) return;

    size_t resolution = 0;
    if (!layer->snapToFeatureFrame(pane, frame, resolution, Layer::SnapLeft)) {
        frame = getMainModel()->getEndFrame();
    }
    
    m_viewManager->setPlaybackFrame(frame);
}

void
MainWindow::rewindStart()
{
    if (!getMainModel()) return;
    m_viewManager->setPlaybackFrame(getMainModel()->getStartFrame());
}

void
MainWindow::stop()
{
    m_playSource->stop();
}

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

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

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

    CommandHistory::getInstance()->startCompoundOperation
	(action->text(), true);

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

    Pane *pane = command->getPane();

    if (i->second.layer == LayerFactory::Spectrum) {
        pane->setPlaybackFollow(View::PlaybackScrollContinuous);
    }

    if (i->second.layer != LayerFactory::TimeRuler &&
        i->second.layer != LayerFactory::Spectrum) {

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

//	std::cerr << "adding time ruler layer " << m_timeRulerLayer << std::endl;

	m_document->addLayerToView(pane, m_timeRulerLayer);
    }

    Layer *newLayer = m_document->createLayer(i->second.layer);
    m_document->setModel(newLayer, m_document->getMainModel());
    m_document->setChannel(newLayer, i->second.channel);
    m_document->addLayerToView(pane, newLayer);

    m_paneStack->setCurrentPane(pane);

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

    updateMenuStates();
}

MainWindow::AddPaneCommand::AddPaneCommand(MainWindow *mw) :
    m_mw(mw),
    m_pane(0),
    m_prevCurrentPane(0),
    m_added(false)
{
}

MainWindow::AddPaneCommand::~AddPaneCommand()
{
    if (m_pane && !m_added) {
	m_mw->m_paneStack->deletePane(m_pane);
    }
}

QString
MainWindow::AddPaneCommand::getName() const
{
    return tr("Add Pane");
}

void
MainWindow::AddPaneCommand::execute()
{
    if (!m_pane) {
	m_prevCurrentPane = m_mw->m_paneStack->getCurrentPane();
	m_pane = m_mw->m_paneStack->addPane();
    } else {
	m_mw->m_paneStack->showPane(m_pane);
    }

    m_mw->m_paneStack->setCurrentPane(m_pane);
    m_mw->m_panner->registerView(m_pane);
    m_added = true;
}

void
MainWindow::AddPaneCommand::unexecute()
{
    m_mw->m_paneStack->hidePane(m_pane);
    m_mw->m_paneStack->setCurrentPane(m_prevCurrentPane);
    m_mw->m_panner->unregisterView(m_pane); 
    m_added = false;
}

MainWindow::RemovePaneCommand::RemovePaneCommand(MainWindow *mw, Pane *pane) :
    m_mw(mw),
    m_pane(pane),
    m_added(true)
{
}

MainWindow::RemovePaneCommand::~RemovePaneCommand()
{
    if (m_pane && !m_added) {
	m_mw->m_paneStack->deletePane(m_pane);
    }
}

QString
MainWindow::RemovePaneCommand::getName() const
{
    return tr("Remove Pane");
}

void
MainWindow::RemovePaneCommand::execute()
{
    m_prevCurrentPane = m_mw->m_paneStack->getCurrentPane();
    m_mw->m_paneStack->hidePane(m_pane);
    m_mw->m_panner->unregisterView(m_pane);
    m_added = false;
}

void
MainWindow::RemovePaneCommand::unexecute()
{
    m_mw->m_paneStack->showPane(m_pane);
    m_mw->m_paneStack->setCurrentPane(m_prevCurrentPane);
    m_mw->m_panner->registerView(m_pane);
    m_added = true;
}

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

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

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

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

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

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

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

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

	Layer *newLayer;

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

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

	} else {

	    newLayer = m_document->createMainModelLayer(type);
	}

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

	return;
    }

    TransformName transform = i->second;
    TransformFactory *factory = TransformFactory::getInstance();

    QString configurationXml;

    int channel = -1;
    // pick up the default channel from any existing layers on the same pane
    for (int j = 0; j < pane->getLayerCount(); ++j) {
	int c = LayerFactory::getInstance()->getChannel(pane->getLayer(j));
	if (c != -1) {
	    channel = c;
	    break;
	}
    }

    bool needConfiguration = false;

    if (factory->isTransformConfigurable(transform)) {
        needConfiguration = true;
    } else {
        int minChannels, maxChannels;
        int myChannels = m_document->getMainModel()->getChannelCount();
        if (factory->getTransformChannelRange(transform,
                                              minChannels,
                                              maxChannels)) {
//            std::cerr << "myChannels: " << myChannels << ", minChannels: " << minChannels << ", maxChannels: " << maxChannels << std::endl;
            needConfiguration = (myChannels > maxChannels && maxChannels == 1);
        }
    }

    if (needConfiguration) {
        bool ok =
            factory->getConfigurationForTransform
            (transform, m_document->getMainModel(), channel, configurationXml);
        if (!ok) return;
    }

    Layer *newLayer = m_document->createDerivedLayer(transform,
                                                     m_document->getMainModel(),
                                                     channel,
                                                     configurationXml);

    if (newLayer) {
        m_document->addLayerToView(pane, newLayer);
        m_document->setChannel(newLayer, channel);
    }

    updateMenuStates();
}

void
MainWindow::deleteCurrentPane()
{
    CommandHistory::getInstance()->startCompoundOperation
	(tr("Delete Pane"), true);

    Pane *pane = m_paneStack->getCurrentPane();
    if (pane) {
	while (pane->getLayerCount() > 0) {
	    Layer *layer = pane->getLayer(0);
	    if (layer) {
		m_document->removeLayerFromView(pane, layer);
	    } else {
		break;
	    }
	}

	RemovePaneCommand *command = new RemovePaneCommand(this, pane);
	CommandHistory::getInstance()->addCommand(command);
    }

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

    updateMenuStates();
}

void
MainWindow::deleteCurrentLayer()
{
    Pane *pane = m_paneStack->getCurrentPane();
    if (pane) {
	Layer *layer = pane->getSelectedLayer();
	if (layer) {
	    m_document->removeLayerFromView(pane, layer);
	}
    }
    updateMenuStates();
}

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

void
MainWindow::playSpeedChanged(int speed)
{
//    static float factors[] = {
//        1.0, 1.1, 1.2, 1.3, 1.5, 1.7, 2.0, 3.0, 4.0, 6.0, 10.0
//    };
//    float factor = factors[speed >= 10 ? speed - 10 : 10 - speed];

    bool slow = false;
    bool something = false;
    float factor;

    if (speed < 100) {
        slow = true;
        speed = 100 - speed;
    } else {
        speed = speed - 100;
    }

    // speed is 0 -> 100

    if (speed == 0) {
        factor = 1.0;
    } else {
        factor = speed;
        factor = 1.0 + (factor * factor) / 1000.f;
        something = true;
    }

    int pc = lrintf((factor - 1.0) * 100);

    if (!slow) factor = 1.0 / factor;

    std::cerr << "speed = " << speed << " factor = " << factor << std::endl;

    m_playSpeed->setToolTip(tr("Playback speed: %1%2%")
                            .arg(!slow ? "+" : "-")
			    .arg(pc));

    m_playSharpen->setEnabled(something);
    bool sharpen = (something && m_playSharpen->isChecked());
    m_playSource->setSlowdownFactor(factor, sharpen);
}

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

    playSpeedChanged(m_playSpeed->value());
}

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

void
MainWindow::sampleRateMismatch(size_t requested, size_t actual,
                               bool willResample)
{
    if (!willResample) {
        //!!! more helpful message needed
        QMessageBox::information
            (this, tr("Sample rate mismatch"),
             tr("The sample rate of this audio file (%1 Hz) does not match\nthe current playback rate (%2 Hz).\n\nThe file will play at the wrong speed.")
             .arg(requested).arg(actual));
    }        

/*!!! Let's not do this for now, and see how we go -- now that we're putting
      sample rate information in the status bar

    QMessageBox::information
	(this, tr("Sample rate mismatch"),
	 tr("The sample rate of this audio file (%1 Hz) does not match\nthat of the output audio device (%2 Hz).\n\nThe file will be resampled automatically during playback.")
	 .arg(requested).arg(actual));
*/

    updateDescriptionLabel();
}

void
MainWindow::layerAdded(Layer *layer)
{
//    std::cerr << "MainWindow::layerAdded(" << layer << ")" << std::endl;
//    setupExistingLayersMenu();
    updateMenuStates();
}

void
MainWindow::layerRemoved(Layer *layer)
{
//    std::cerr << "MainWindow::layerRemoved(" << layer << ")" << std::endl;
    setupExistingLayersMenu();
    updateMenuStates();
}

void
MainWindow::layerAboutToBeDeleted(Layer *layer)
{
//    std::cerr << "MainWindow::layerAboutToBeDeleted(" << layer << ")" << std::endl;
    if (layer == m_timeRulerLayer) {
//	std::cerr << "(this is the time ruler layer)" << std::endl;
	m_timeRulerLayer = 0;
    }
}

void
MainWindow::layerInAView(Layer *layer, bool inAView)
{
//    std::cerr << "MainWindow::layerInAView(" << layer << "," << inAView << ")" << std::endl;

    // Check whether we need to add or remove model from play source
    Model *model = layer->getModel();
    if (model) {
        if (inAView) {
            m_playSource->addModel(model);
        } else {
            bool found = false;
            for (int i = 0; i < m_paneStack->getPaneCount(); ++i) {
                Pane *pane = m_paneStack->getPane(i);
                if (!pane) continue;
                for (int j = 0; j < pane->getLayerCount(); ++j) {
                    Layer *pl = pane->getLayer(j);
                    if (pl && pl->getModel() == model) {
                        found = true;
                        break;
                    }
                }
                if (found) break;
            }
            if (!found) m_playSource->removeModel(model);
        }
    }

    setupExistingLayersMenu();
    updateMenuStates();
}

void
MainWindow::modelAdded(Model *model)
{
//    std::cerr << "MainWindow::modelAdded(" << model << ")" << std::endl;
    m_playSource->addModel(model);
}

void
MainWindow::mainModelChanged(WaveFileModel *model)
{
//    std::cerr << "MainWindow::mainModelChanged(" << model << ")" << std::endl;
    updateDescriptionLabel();
    m_panLayer->setModel(model);
    if (model) m_viewManager->setMainModelSampleRate(model->getSampleRate());
    if (model && !m_playTarget) createPlayTarget();
}

void
MainWindow::modelAboutToBeDeleted(Model *model)
{
//    std::cerr << "MainWindow::modelAboutToBeDeleted(" << model << ")" << std::endl;
    m_playSource->removeModel(model);
}

void
MainWindow::modelGenerationFailed(QString transformName)
{
    QMessageBox::warning
        (this,
         tr("Failed to generate layer"),
         tr("The layer transform \"%1\" failed to run.\nThis probably means that a plugin failed to initialise.")
         .arg(transformName),
         QMessageBox::Ok, 0);
}

void
MainWindow::modelRegenerationFailed(QString layerName, QString transformName)
{
    QMessageBox::warning
        (this,
         tr("Failed to regenerate layer"),
         tr("Failed to regenerate derived layer \"%1\".\nThe layer transform \"%2\" failed to run.\nThis probably means the layer used a plugin that is not currently available.")
         .arg(layerName).arg(transformName),
         QMessageBox::Ok, 0);
}

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

void
MainWindow::showLayerTree()
{
    QTreeView *view = new QTreeView();
    LayerTreeModel *tree = new LayerTreeModel(m_paneStack);
    view->expand(tree->index(0, 0, QModelIndex()));
    view->setModel(tree);
    view->show();
}

void
MainWindow::preferenceChanged(PropertyContainer::PropertyName name)
{
    if (name == "Property Box Layout") {
        if (Preferences::getInstance()->getPropertyBoxLayout() ==
            Preferences::VerticallyStacked) {
            m_paneStack->setLayoutStyle(PaneStack::PropertyStackPerPaneLayout);
        } else {
            m_paneStack->setLayoutStyle(PaneStack::SinglePropertyStackLayout);
        }
    }
}

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

    m_preferencesDialog = new PreferencesDialog(this);

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

    m_preferencesDialog->show();
}

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

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

void
MainWindow::openHelpUrl(QString url)
{
    // This method mostly lifted from Qt Assistant source code

    QProcess *process = new QProcess(this);
    connect(process, SIGNAL(finished(int)), process, SLOT(deleteLater()));

    QStringList args;

#ifdef Q_OS_MAC
    args.append(url);
    process->start("open", args);
#else
#ifdef Q_OS_WIN32

	QString pf(getenv("ProgramFiles"));
	QString command = pf + QString("\\Internet Explorer\\IEXPLORE.EXE");

	args.append(url);
	process->start(command, args);

#else
#ifdef Q_WS_X11
    if (!qgetenv("KDE_FULL_SESSION").isEmpty()) {
        args.append("exec");
        args.append(url);
        process->start("kfmclient", args);
    } else if (!qgetenv("BROWSER").isEmpty()) {
        args.append(url);
        process->start(qgetenv("BROWSER"), args);
    } else {
        args.append(url);
        process->start("firefox", args);
    }
#endif
#endif
#endif
}

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

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

    QString aboutText;

    aboutText += tr("<h3>About Sonic Visualiser</h3>");
    aboutText += tr("<p>Sonic Visualiser is a program for viewing and exploring audio data for semantic music analysis and annotation.</p>");
    aboutText += tr("<p>%1 : %2 build</p>")
        .arg(version)
        .arg(debug ? tr("Debug") : tr("Release"));

#ifdef BUILD_STATIC
    aboutText += tr("<p>Statically linked");
#ifndef QT_SHARED
    aboutText += tr("<br>With Qt (v%1) &copy; Trolltech AS").arg(QT_VERSION_STR);
#endif
#ifdef HAVE_JACK
    aboutText += tr("<br>With JACK audio output (v%1) &copy; Paul Davis and Jack O'Quin").arg(JACK_VERSION);
#endif
#ifdef HAVE_PORTAUDIO
    aboutText += tr("<br>With PortAudio audio output &copy; Ross Bencina and Phil Burk");
#endif
#ifdef HAVE_OGGZ
    aboutText += tr("<br>With Ogg file decoder (oggz v%1, fishsound v%2) &copy; CSIRO Australia").arg(OGGZ_VERSION).arg(FISHSOUND_VERSION);
#endif
#ifdef HAVE_MAD
    aboutText += tr("<br>With MAD mp3 decoder (v%1) &copy; Underbit Technologies Inc").arg(MAD_VERSION);
#endif
#ifdef HAVE_SAMPLERATE
    aboutText += tr("<br>With libsamplerate (v%1) &copy; Erik de Castro Lopo").arg(SAMPLERATE_VERSION);
#endif
#ifdef HAVE_SNDFILE
    aboutText += tr("<br>With libsndfile (v%1) &copy; Erik de Castro Lopo").arg(SNDFILE_VERSION);
#endif
#ifdef HAVE_FFTW3
    aboutText += tr("<br>With FFTW3 (v%1) &copy; Matteo Frigo and MIT").arg(FFTW3_VERSION);
#endif
#ifdef HAVE_VAMP
    aboutText += tr("<br>With Vamp plugin support (API v%1, SDK v%2) &copy; Chris Cannam").arg(VAMP_API_VERSION).arg(VAMP_SDK_VERSION);
#endif
    aboutText += tr("<br>With LADSPA plugin support (API v%1) &copy; Richard Furse, Paul Davis, Stefan Westerfeld").arg(LADSPA_VERSION);
    aboutText += tr("<br>With DSSI plugin support (API v%1) &copy; Chris Cannam, Steve Harris, Sean Bolton").arg(DSSI_VERSION);
    aboutText += "</p>";
#endif

    aboutText += 
        "<p>Sonic Visualiser Copyright &copy; 2005 - 2006 Chris Cannam<br>"
        "Centre for Digital Music, Queen Mary, University of London.</p>"
        "<p>This program is free software; you can redistribute it and/or<br>"
        "modify it under the terms of the GNU General Public License as<br>"
        "published by the Free Software Foundation; either version 2 of the<br>"
        "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 Sonic Visualiser"), aboutText);
}


#ifdef INCLUDE_MOCFILES
#include "MainWindow.moc.cpp"
#endif