comparison sv/main/MainWindow.cpp @ 0:fc9323a41f5a

start base : Sonic Visualiser sv1-1.0rc1

+/* -*- 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 and QMUL.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#include "version.h"
+
+#include "MainWindow.h"
+#include "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 "layer/SliceLayer.h"
+#include "layer/SliceableLayer.h"
+#include "widgets/Fader.h"
+#include "view/Overview.h"
+#include "widgets/PropertyBox.h"
+#include "widgets/PropertyStack.h"
+#include "widgets/AudioDial.h"
+#include "widgets/LayerTree.h"
+#include "widgets/ListInputDialog.h"
+#include "widgets/SubdividingMenu.h"
+#include "widgets/NotifyingPushButton.h"
+#include "audioio/AudioCallbackPlaySource.h"
+#include "audioio/AudioCallbackPlayTarget.h"
+#include "audioio/AudioTargetFactory.h"
+#include "audioio/PlaySpeedRangeMapper.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 "data/fileio/RemoteFile.h"
+#include "data/fft/FFTDataServer.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"
+#include "osc/OSCQueue.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 <QMessageBox>
+#include <QGridLayout>
+#include <QLabel>
+#include <QAction>
+#include <QMenuBar>
+#include <QToolBar>
+#include <QInputDialog>
+#include <QStatusBar>
+#include <QTreeView>
+#include <QFile>
+#include <QFileInfo>
+#include <QDir>
+#include <QTextStream>
+#include <QProcess>
+#include <QShortcut>
+#include <QSettings>
+#include <QDateTime>
+#include <QProcess>
+#include <QCheckBox>
+#include <QRegExp>
+
+#include <iostream>
+#include <cstdio>
+#include <errno.h>
+
+using std::cerr;
+using std::endl;
+
+using std::vector;
+using std::map;
+using std::set;
+
+
+MainWindow::MainWindow(bool withAudioOutput, bool withOSCSupport) :
+    m_document(0),
+    m_paneStack(0),
+    m_viewManager(0),
+    m_overview(0),
+    m_timeRulerLayer(0),
+    m_audioOutput(withAudioOutput),
+    m_playSource(0),
+    m_playTarget(0),
+    m_oscQueue(withOSCSupport ? new OSCQueue() : 0),
+    m_recentFiles("RecentFiles", 20),
+    m_recentTransforms("RecentTransforms", 20),
+    m_mainMenusCreated(false),
+    m_paneMenu(0),
+    m_layerMenu(0),
+    m_transformsMenu(0),
+    m_existingLayersMenu(0),
+    m_sliceMenu(0),
+    m_recentFilesMenu(0),
+    m_recentTransformsMenu(0),
+    m_rightButtonMenu(0),
+    m_rightButtonLayerMenu(0),
+    m_rightButtonTransformsMenu(0),
+    m_documentModified(false),
+    m_openingAudioFile(false),
+    m_abandoning(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()));
+    connect(m_viewManager, SIGNAL(inProgressSelectionChanged()),
+	    this, SLOT(inProgressSelectionChanged()));
+
+    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)));
+    connect(m_paneStack, SIGNAL(propertyStacksResized()),
+            this, SLOT(propertyStacksResized()));
+    connect(m_paneStack, SIGNAL(contextHelpChanged(const QString &)),
+            this, SLOT(contextHelpChanged(const QString &)));
+
+    m_overview = new Overview(frame);
+    m_overview->setViewManager(m_viewManager);
+    m_overview->setFixedHeight(40);
+    m_overview->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
+    connect(m_overview, SIGNAL(contextHelpChanged(const QString &)),
+            this, SLOT(contextHelpChanged(const QString &)));
+
+    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_overview->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)));
+    connect(m_playSource, SIGNAL(audioOverloadPluginDisabled()),
+            this,           SLOT(audioOverloadPluginDisabled()));
+
+    m_fader = new Fader(frame, false);
+    connect(m_fader, SIGNAL(mouseEntered()), this, SLOT(mouseEnteredWidget()));
+    connect(m_fader, SIGNAL(mouseLeft()), this, SLOT(mouseLeftWidget()));
+
+    m_playSpeed = new AudioDial(frame);
+    m_playSpeed->setMinimum(0);
+    m_playSpeed->setMaximum(200);
+    m_playSpeed->setValue(100);
+    m_playSpeed->setFixedWidth(24);
+    m_playSpeed->setFixedHeight(24);
+    m_playSpeed->setNotchesVisible(true);
+    m_playSpeed->setPageStep(10);
+    m_playSpeed->setObjectName(tr("Playback Speedup"));
+    m_playSpeed->setDefaultValue(100);
+    m_playSpeed->setRangeMapper(new PlaySpeedRangeMapper(0, 200));
+    m_playSpeed->setShowToolTip(true);
+    connect(m_playSpeed, SIGNAL(valueChanged(int)),
+	    this, SLOT(playSpeedChanged(int)));
+    connect(m_playSpeed, SIGNAL(mouseEntered()), this, SLOT(mouseEnteredWidget()));
+    connect(m_playSpeed, SIGNAL(mouseLeft()), this, SLOT(mouseLeftWidget()));
+
+    m_playSharpen = new NotifyingPushButton(frame);
+    m_playSharpen->setToolTip(tr("Sharpen percussive transients"));
+    m_playSharpen->setFixedSize(20, 20);
+//    m_playSharpen->setFlat(true);
+    m_playSharpen->setEnabled(false);
+    m_playSharpen->setCheckable(true);
+    m_playSharpen->setChecked(false);
+    m_playSharpen->setIcon(QIcon(":icons/sharpen.png"));
+    connect(m_playSharpen, SIGNAL(clicked()), this, SLOT(playSharpenToggled()));
+    connect(m_playSharpen, SIGNAL(mouseEntered()), this, SLOT(mouseEnteredWidget()));
+    connect(m_playSharpen, SIGNAL(mouseLeft()), this, SLOT(mouseLeftWidget()));
+
+    m_playMono = new NotifyingPushButton(frame);
+    m_playMono->setToolTip(tr("Run time stretcher in mono only"));
+    m_playMono->setFixedSize(20, 20);
+//    m_playMono->setFlat(true);
+    m_playMono->setEnabled(false);
+    m_playMono->setCheckable(true);
+    m_playMono->setChecked(false);
+    m_playMono->setIcon(QIcon(":icons/mono.png"));
+    connect(m_playMono, SIGNAL(clicked()), this, SLOT(playMonoToggled()));
+    connect(m_playMono, SIGNAL(mouseEntered()), this, SLOT(mouseEnteredWidget()));
+    connect(m_playMono, SIGNAL(mouseLeft()), this, SLOT(mouseLeftWidget()));
+
+    QSettings settings;
+    settings.beginGroup("MainWindow");
+    m_playSharpen->setChecked(settings.value("playsharpen", true).toBool());
+    m_playMono->setChecked(settings.value("playmono", false).toBool());
+    settings.endGroup();
+
+    layout->setSpacing(4);
+    layout->addWidget(m_paneStack, 0, 0, 1, 5);
+    layout->addWidget(m_overview, 1, 0);
+    layout->addWidget(m_fader, 1, 1);
+    layout->addWidget(m_playSpeed, 1, 2);
+    layout->addWidget(m_playSharpen, 1, 3);
+    layout->addWidget(m_playMono, 1, 4);
+
+    m_paneStack->setPropertyStackMinWidth
+        (m_fader->width() + m_playSpeed->width() + m_playSharpen->width() +
+         m_playMono->width() + layout->spacing() * 4);
+
+    layout->setColumnStretch(0, 10);
+
+    frame->setLayout(layout);
+
+    connect(m_viewManager, SIGNAL(outputLevelsChanged(float, float)),
+	    this, SLOT(outputLevelsChanged(float, float)));
+
+    connect(m_viewManager, SIGNAL(playbackFrameChanged(unsigned long)),
+            this, SLOT(playbackFrameChanged(unsigned long)));
+
+    connect(m_viewManager, SIGNAL(globalCentreFrameChanged(unsigned long)),
+            this, SLOT(globalCentreFrameChanged(unsigned long)));
+
+    connect(m_viewManager, SIGNAL(viewCentreFrameChanged(View *, unsigned long)),
+            this, SLOT(viewCentreFrameChanged(View *, unsigned long)));
+
+    connect(m_viewManager, SIGNAL(viewZoomLevelChanged(View *, unsigned long, bool)),
+            this, SLOT(viewZoomLevelChanged(View *, unsigned long, bool)));
+
+    connect(Preferences::getInstance(),
+            SIGNAL(propertyChanged(PropertyContainer::PropertyName)),
+            this,
+            SLOT(preferenceChanged(PropertyContainer::PropertyName)));
+
+//    preferenceChanged("Property Box Layout");
+
+    if (m_oscQueue && m_oscQueue->isOK()) {
+        connect(m_oscQueue, SIGNAL(messagesAvailable()), this, SLOT(pollOSC()));
+        QTimer *oscTimer = new QTimer(this);
+        connect(oscTimer, SIGNAL(timeout()), this, SLOT(pollOSC()));
+        oscTimer->start(1000);
+    }
+
+    setupMenus();
+    setupToolbars();
+
+    statusBar();
+
+    newSession();
+}
+
+MainWindow::~MainWindow()
+{
+//    std::cerr << "MainWindow::~MainWindow()" << std::endl;
+
+    if (!m_abandoning) {
+        closeSession();
+    }
+    delete m_playTarget;
+    delete m_playSource;
+    delete m_viewManager;
+    delete m_oscQueue;
+    Profiles::getInstance()->dump();
+}
+
+QString
+MainWindow::getOpenFileName(FileFinder::FileType type)
+{
+    FileFinder *ff = FileFinder::getInstance();
+    switch (type) {
+    case FileFinder::SessionFile:
+        return ff->getOpenFileName(type, m_sessionFile);
+    case FileFinder::AudioFile:
+        return ff->getOpenFileName(type, m_audioFile);
+    case FileFinder::LayerFile:
+        return ff->getOpenFileName(type, m_sessionFile);
+    case FileFinder::SessionOrAudioFile:
+        return ff->getOpenFileName(type, m_sessionFile);
+    case FileFinder::ImageFile:
+        return ff->getOpenFileName(type, m_sessionFile);
+    case FileFinder::AnyFile:
+        if (getMainModel() != 0 &&
+            m_paneStack != 0 &&
+            m_paneStack->getCurrentPane() != 0) { // can import a layer
+            return ff->getOpenFileName(FileFinder::AnyFile, m_sessionFile);
+        } else {
+            return ff->getOpenFileName(FileFinder::SessionOrAudioFile,
+                                       m_sessionFile);
+        }
+    }
+    return "";
+}
+
+QString
+MainWindow::getSaveFileName(FileFinder::FileType type)
+{
+    FileFinder *ff = FileFinder::getInstance();
+    switch (type) {
+    case FileFinder::SessionFile:
+        return ff->getSaveFileName(type, m_sessionFile);
+    case FileFinder::AudioFile:
+        return ff->getSaveFileName(type, m_audioFile);
+    case FileFinder::LayerFile:
+        return ff->getSaveFileName(type, m_sessionFile);
+    case FileFinder::SessionOrAudioFile:
+        return ff->getSaveFileName(type, m_sessionFile);
+    case FileFinder::ImageFile:
+        return ff->getSaveFileName(type, m_sessionFile);
+    case FileFinder::AnyFile:
+        return ff->getSaveFileName(type, m_sessionFile);
+    }
+    return "";
+}
+
+void
+MainWindow::registerLastOpenedFilePath(FileFinder::FileType type, QString path)
+{
+    FileFinder *ff = FileFinder::getInstance();
+    ff->registerLastOpenedFilePath(type, path);
+}
+
+void
+MainWindow::setupMenus()
+{
+    if (!m_mainMenusCreated) {
+        m_rightButtonMenu = new QMenu();
+
+        // No -- we don't want tear-off enabled on the right-button
+        // menu.  If it is enabled, then simply right-clicking and
+        // releasing will pop up the menu, activate the tear-off, and
+        // leave the torn-off menu window in front of the main window.
+        // That isn't desirable.  I'm not sure it ever would be, in a
+        // context menu -- perhaps technically a Qt bug?
+//        m_rightButtonMenu->setTearOffEnabled(true);
+    }
+
+    if (m_rightButtonLayerMenu) {
+        m_rightButtonLayerMenu->clear();
+    } else {
+        m_rightButtonLayerMenu = m_rightButtonMenu->addMenu(tr("&Layer"));
+        m_rightButtonLayerMenu->setTearOffEnabled(true);
+        m_rightButtonMenu->addSeparator();
+    }
+
+    if (m_rightButtonTransformsMenu) {
+        m_rightButtonTransformsMenu->clear();
+    } else {
+        m_rightButtonTransformsMenu = m_rightButtonMenu->addMenu(tr("&Transform"));
+        m_rightButtonTransformsMenu->setTearOffEnabled(true);
+        m_rightButtonMenu->addSeparator();
+    }
+
+    if (!m_mainMenusCreated) {
+        CommandHistory::getInstance()->registerMenu(m_rightButtonMenu);
+        m_rightButtonMenu->addSeparator();
+    }
+
+    setupFileMenu();
+    setupEditMenu();
+    setupViewMenu();
+    setupPaneAndLayerMenus();
+    setupTransformsMenu();
+    setupHelpMenu();
+
+    m_mainMenusCreated = true;
+}
+
+void
+MainWindow::setupFileMenu()
+{
+    if (m_mainMenusCreated) return;
+
+    QMenu *menu = menuBar()->addMenu(tr("&File"));
+    menu->setTearOffEnabled(true);
+    QToolBar *toolbar = addToolBar(tr("File Toolbar"));
+
+    QIcon icon(":icons/filenew.png");
+    icon.addFile(":icons/filenew-22.png");
+    QAction *action = new QAction(icon, tr("&New Session"), this);
+    action->setShortcut(tr("Ctrl+N"));
+    action->setStatusTip(tr("Abandon the current Sonic Visualiser session and start a new one"));
+    connect(action, SIGNAL(triggered()), this, SLOT(newSession()));
+    menu->addAction(action);
+    toolbar->addAction(action);
+
+    icon = QIcon(":icons/fileopensession.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);
+
+    icon = QIcon(":icons/fileopen.png");
+    icon.addFile(":icons/fileopen-22.png");
+
+    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();
+
+    icon = QIcon(":icons/fileopenaudio.png");
+    action = new QAction(icon, tr("&Import Audio File..."), this);
+    action->setShortcut(tr("Ctrl+I"));
+    action->setStatusTip(tr("Import an existing audio file"));
+    connect(action, SIGNAL(triggered()), this, SLOT(importAudio()));
+    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();
+
+    action = new QAction(tr("Export Image File..."), this);
+    action->setStatusTip(tr("Export a single pane to an image file"));
+    connect(action, SIGNAL(triggered()), this, SLOT(exportImage()));
+    connect(this, SIGNAL(canExportImage(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+
+    menu->addSeparator();
+
+    action = new QAction(tr("Open Lo&cation..."), this);
+    action->setShortcut(tr("Ctrl+Shift+O"));
+    action->setStatusTip(tr("Open or import a file from a remote URL"));
+    connect(action, SIGNAL(triggered()), this, SLOT(openLocation()));
+    menu->addAction(action);
+
+    menu->addSeparator();
+
+    m_recentFilesMenu = menu->addMenu(tr("&Recent Files"));
+    m_recentFilesMenu->setTearOffEnabled(true);
+    setupRecentFilesMenu();
+    connect(&m_recentFiles, SIGNAL(recentChanged()),
+            this, SLOT(setupRecentFilesMenu()));
+
+    menu->addSeparator();
+    action = new QAction(tr("&Preferences..."), this);
+    action->setStatusTip(tr("Adjust the application preferences"));
+    connect(action, SIGNAL(triggered()), this, SLOT(preferences()));
+    menu->addAction(action);
+	
+    /*!!!
+      menu->addSeparator();
+	
+      action = new QAction(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"));
+    action->setStatusTip(tr("Exit Sonic Visualiser"));
+    connect(action, SIGNAL(triggered()), this, SLOT(close()));
+    menu->addAction(action);
+}
+
+void
+MainWindow::setupEditMenu()
+{
+    if (m_mainMenusCreated) return;
+
+    QMenu *menu = menuBar()->addMenu(tr("&Edit"));
+    menu->setTearOffEnabled(true);
+    CommandHistory::getInstance()->registerMenu(menu);
+
+    menu->addSeparator();
+
+    QAction *action = new QAction(QIcon(":/icons/editcut.png"),
+                                  tr("Cu&t"), this);
+    action->setShortcut(tr("Ctrl+X"));
+    action->setStatusTip(tr("Cut the selection from the current layer to the clipboard"));
+    connect(action, SIGNAL(triggered()), this, SLOT(cut()));
+    connect(this, SIGNAL(canEditSelection(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+    m_rightButtonMenu->addAction(action);
+
+    action = new QAction(QIcon(":/icons/editcopy.png"),
+                         tr("&Copy"), this);
+    action->setShortcut(tr("Ctrl+C"));
+    action->setStatusTip(tr("Copy the selection from the current layer to the clipboard"));
+    connect(action, SIGNAL(triggered()), this, SLOT(copy()));
+    connect(this, SIGNAL(canEditSelection(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+    m_rightButtonMenu->addAction(action);
+
+    action = new QAction(QIcon(":/icons/editpaste.png"),
+                         tr("&Paste"), this);
+    action->setShortcut(tr("Ctrl+V"));
+    action->setStatusTip(tr("Paste from the clipboard to the current layer"));
+    connect(action, SIGNAL(triggered()), this, SLOT(paste()));
+    connect(this, SIGNAL(canPaste(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+    m_rightButtonMenu->addAction(action);
+
+    action = new QAction(tr("&Delete Selected Items"), this);
+    action->setShortcut(tr("Del"));
+    action->setStatusTip(tr("Delete the selection from the current layer"));
+    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"));
+    action->setStatusTip(tr("Select the whole duration of the current session"));
+    connect(action, SIGNAL(triggered()), this, SLOT(selectAll()));
+    connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+    m_rightButtonMenu->addAction(action);
+	
+    action = new QAction(tr("Select &Visible Range"), this);
+    action->setShortcut(tr("Ctrl+Shift+A"));
+    action->setStatusTip(tr("Select the time range corresponding to the current window width"));
+    connect(action, SIGNAL(triggered()), this, SLOT(selectVisible()));
+    connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+	
+    action = new QAction(tr("Select to &Start"), this);
+    action->setShortcut(tr("Shift+Left"));
+    action->setStatusTip(tr("Select from the start of the session to the current playback position"));
+    connect(action, SIGNAL(triggered()), this, SLOT(selectToStart()));
+    connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+	
+    action = new QAction(tr("Select to &End"), this);
+    action->setShortcut(tr("Shift+Right"));
+    action->setStatusTip(tr("Select from the current playback position to the end of the session"));
+    connect(action, SIGNAL(triggered()), this, SLOT(selectToEnd()));
+    connect(this, SIGNAL(canSelect(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+
+    action = new QAction(tr("C&lear Selection"), this);
+    action->setShortcut(tr("Esc"));
+    action->setStatusTip(tr("Clear the selection"));
+    connect(action, SIGNAL(triggered()), this, SLOT(clearSelection()));
+    connect(this, SIGNAL(canClearSelection(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+    m_rightButtonMenu->addAction(action);
+
+    menu->addSeparator();
+
+    action = new QAction(tr("&Insert Instant at Playback Position"), this);
+    action->setShortcut(tr("Enter"));
+    action->setStatusTip(tr("Insert a new time instant at the current playback position, in a new layer if necessary"));
+    connect(action, SIGNAL(triggered()), this, SLOT(insertInstant()));
+    connect(this, SIGNAL(canInsertInstant(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+
+    action = new QAction(tr("Insert Instants at Selection &Boundaries"), this);
+    action->setShortcut(tr("Shift+Enter"));
+    action->setStatusTip(tr("Insert new time instants at the start and end of the current selection, in a new layer if necessary"));
+    connect(action, SIGNAL(triggered()), this, SLOT(insertInstantsAtBoundaries()));
+    connect(this, SIGNAL(canInsertInstantsAtBoundaries(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+
+    // Laptop shortcut (no keypad Enter key)
+    connect(new QShortcut(tr(";"), this), SIGNAL(activated()),
+            this, SLOT(insertInstant()));
+}
+
+void
+MainWindow::setupViewMenu()
+{
+    if (m_mainMenusCreated) return;
+
+    QAction *action = 0;
+
+    QMenu *menu = menuBar()->addMenu(tr("&View"));
+    menu->setTearOffEnabled(true);
+    action = new QAction(tr("Scroll &Left"), this);
+    action->setShortcut(tr("Left"));
+    action->setStatusTip(tr("Scroll the current pane to the left"));
+    connect(action, SIGNAL(triggered()), this, SLOT(scrollLeft()));
+    connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
+    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("J&ump Right"), this);
+    action->setShortcut(tr("Ctrl+Right"));
+    action->setStatusTip(tr("Scroll the current pane a big step to the right"));
+    connect(action, SIGNAL(triggered()), this, SLOT(jumpRight()));
+    connect(this, SIGNAL(canScroll(bool)), action, SLOT(setEnabled(bool)));
+    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);
+    action->setStatusTip(tr("Restore the zoom level to the default"));
+    connect(action, SIGNAL(triggered()), this, SLOT(zoomDefault()));
+    connect(this, SIGNAL(canZoom(bool)), action, SLOT(setEnabled(bool)));
+    menu->addAction(action);
+
+    action = new QAction(QIcon(":/icons/zoom-fit.png"),
+                         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);
+
+    menu->addSeparator();
+
+    QActionGroup *overlayGroup = new QActionGroup(this);
+        
+    action = new QAction(tr("Show &No Overlays"), this);
+    action->setShortcut(tr("0"));
+    action->setStatusTip(tr("Hide centre indicator, frame times, layer names and scale"));
+    connect(action, SIGNAL(triggered()), this, SLOT(showNoOverlays()));
+    action->setCheckable(true);
+    action->setChecked(false);
+    overlayGroup->addAction(action);
+    menu->addAction(action);
+        
+    action = new QAction(tr("Show &Minimal Overlays"), this);
+    action->setShortcut(tr("9"));
+    action->setStatusTip(tr("Show centre indicator only"));
+    connect(action, SIGNAL(triggered()), this, SLOT(showMinimalOverlays()));
+    action->setCheckable(true);
+    action->setChecked(false);
+    overlayGroup->addAction(action);
+    menu->addAction(action);
+        
+    action = new QAction(tr("Show &Standard Overlays"), this);
+    action->setShortcut(tr("8"));
+    action->setStatusTip(tr("Show centre indicator, frame times and scale"));
+    connect(action, SIGNAL(triggered()), this, SLOT(showStandardOverlays()));
+    action->setCheckable(true);
+    action->setChecked(true);
+    overlayGroup->addAction(action);
+    menu->addAction(action);
+        
+    action = new QAction(tr("Show &All Overlays"), this);
+    action->setShortcut(tr("7"));
+    action->setStatusTip(tr("Show all texts and scale"));
+    connect(action, SIGNAL(triggered()), this, SLOT(showAllOverlays()));
+    action->setCheckable(true);
+    action->setChecked(false);
+    overlayGroup->addAction(action);
+    menu->addAction(action);
+        
+    menu->addSeparator();
+
+    action = new QAction(tr("Show &Zoom Wheels"), this);
+    action->setShortcut(tr("Z"));
+    action->setStatusTip(tr("Show thumbwheels for zooming horizontally and vertically"));
+    connect(action, SIGNAL(triggered()), this, SLOT(toggleZoomWheels()));
+    action->setCheckable(true);
+    action->setChecked(m_viewManager->getZoomWheelsEnabled());
+    menu->addAction(action);
+        
+    action = new QAction(tr("Show Property Bo&xes"), this);
+    action->setShortcut(tr("X"));
+    action->setStatusTip(tr("Show the layer property boxes at the side of the main window"));
+    connect(action, SIGNAL(triggered()), this, SLOT(togglePropertyBoxes()));
+    action->setCheckable(true);
+    action->setChecked(true);
+    menu->addAction(action);
+
+    action = new QAction(tr("Show Status &Bar"), this);
+    action->setStatusTip(tr("Show context help information in the status bar at the bottom of the window"));
+    connect(action, SIGNAL(triggered()), this, SLOT(toggleStatusBar()));
+    action->setCheckable(true);
+    action->setChecked(true);
+    menu->addAction(action);
+
+    QSettings settings;
+    settings.beginGroup("MainWindow");
+    bool sb = settings.value("showstatusbar", true).toBool();
+    if (!sb) {
+        action->setChecked(false);
+        statusBar()->hide();
+    }
+    settings.endGroup();
+
+/*!!! This one doesn't work properly yet
+
+    menu->addSeparator();
+
+    action = new QAction(tr("Show La&yer Hierarchy"), this);
+    action->setShortcut(tr("Alt+L"));
+    action->setStatusTip(tr("Open a window displaying the hierarchy of panes and layers in this session"));
+    connect(action, SIGNAL(triggered()), this, SLOT(showLayerTree()));
+    menu->addAction(action);
+ */
+}
+
+void
+MainWindow::setupPaneAndLayerMenus()
+{
+    if (m_paneMenu) {
+	m_paneActions.clear();
+	m_paneMenu->clear();
+    } else {
+	m_paneMenu = menuBar()->addMenu(tr("&Pane"));
+        m_paneMenu->setTearOffEnabled(true);
+    }
+
+    if (m_layerMenu) {
+	m_layerActions.clear();
+	m_layerMenu->clear();
+    } else {
+	m_layerMenu = menuBar()->addMenu(tr("&Layer"));
+        m_layerMenu->setTearOffEnabled(true);
+    }
+
+    QMenu *menu = m_paneMenu;
+
+    QAction *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();
+
+    LayerFactory::LayerType backgroundTypes[] = {
+	LayerFactory::Waveform,
+	LayerFactory::Spectrogram,
+	LayerFactory::MelodicRangeSpectrogram,
+	LayerFactory::PeakFrequencySpectrogram,
+        LayerFactory::Spectrum
+    };
+
+    std::vector<Model *> models;
+    if (m_document) models = m_document->getTransformInputModels(); //!!! not well named for this!
+    bool plural = (models.size() > 1);
+    if (models.empty()) {
+        models.push_back(getMainModel()); // probably 0
+    }
+
+    for (unsigned int i = 0;
+	 i < sizeof(backgroundTypes)/sizeof(backgroundTypes[0]); ++i) {
+
+	for (int menuType = 0; menuType <= 1; ++menuType) { // pane, layer
+
+	    if (menuType == 0) menu = m_paneMenu;
+	    else menu = m_layerMenu;
+
+	    QMenu *submenu = 0;
+
+            QIcon icon;
+            QString mainText, shortcutText, tipText, channelText;
+            LayerFactory::LayerType type = backgroundTypes[i];
+            bool mono = true;
+            
+            switch (type) {
+                    
+            case LayerFactory::Waveform:
+                icon = 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:
+                icon = QIcon(":/icons/spectrogram.png");
+                mainText = tr("Add &Spectrogram");
+                if (menuType == 0) {
+                    shortcutText = tr("Alt+S");
+                    tipText = tr("Add a new pane showing a spectrogram");
+                } else {
+                    tipText = tr("Add a new layer showing a spectrogram");
+                }
+                break;
+		
+            case LayerFactory::MelodicRangeSpectrogram:
+                icon = QIcon(":/icons/spectrogram.png");
+                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 an overview of note pitches");
+                } else {
+                    tipText = tr("Add a new layer showing a spectrogram set up for an overview of note pitches");
+                }
+                break;
+		
+            case LayerFactory::PeakFrequencySpectrogram:
+                icon = QIcon(":/icons/spectrogram.png");
+                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:
+                icon = QIcon(":/icons/spectrum.png");
+                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;
+            }
+
+            std::vector<Model *> candidateModels;
+            if (menuType == 0) {
+                candidateModels = models;
+            } else {
+                candidateModels.push_back(0);
+            }
+            
+            for (std::vector<Model *>::iterator mi =
+                     candidateModels.begin();
+                 mi != candidateModels.end(); ++mi) {
+                
+                Model *model = *mi;
+
+                int channels = 0;
+                if (model) {
+                    DenseTimeValueModel *dtvm =
+                        dynamic_cast<DenseTimeValueModel *>(model);
+                    if (dtvm) channels = dtvm->getChannelCount();
+                }
+                if (channels < 1 && getMainModel()) {
+                    channels = getMainModel()->getChannelCount();
+                }
+                if (channels < 1) channels = 1;
+
+                for (int c = 0; c <= channels; ++c) {
+
+                    if (c == 1 && channels == 1) continue;
+                    bool isDefault = (c == 0);
+                    bool isOnly = (isDefault && (channels == 1));
+
+                    if (menuType == 1) {
+                        if (isDefault) isOnly = true;
+                        else continue;
+                    }
+
+                    if (isOnly && (!plural || menuType == 1)) {
+
+                        if (menuType == 1 && type != LayerFactory::Waveform) {
+                            action = new QAction(mainText, this);
+                        } else {
+                            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 {
+                        
+                        if (!submenu) {
+                            submenu = menu->addMenu(mainText);
+                            submenu->setTearOffEnabled(true);
+                        } else if (isDefault) {
+                            submenu->addSeparator();
+                        }
+
+                        QString actionText;
+                        if (c == 0) {
+                            if (mono) {
+                                actionText = tr("&All Channels Mixed");
+                            } else {
+                                actionText = tr("&All Channels");
+                            }
+                        } else {
+                            actionText = tr("Channel &%1").arg(c);
+                        }
+
+                        if (model) {
+                            actionText = tr("%1: %2")
+                                .arg(model->objectName())
+                                .arg(actionText);
+                        }
+
+                        if (isDefault) {
+                            action = new QAction(icon, actionText, this);
+                            if (!model || model == getMainModel()) {
+                                action->setShortcut(shortcutText);
+                            }
+                        } else {
+                            action = new QAction(actionText, this);
+                        }
+
+                        action->setStatusTip(tipText);
+
+                        if (menuType == 0) {
+                            connect(action, SIGNAL(triggered()),
+                                    this, SLOT(addPane()));
+                            connect(this, SIGNAL(canAddPane(bool)),
+                                    action, SLOT(setEnabled(bool)));
+                            m_paneActions[action] =
+                                PaneConfiguration(type, model, 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 active 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_existingLayersMenu->setTearOffEnabled(true);
+    m_rightButtonLayerMenu->addMenu(m_existingLayersMenu);
+
+    m_sliceMenu = menu->addMenu(tr("Add S&lice of Layer"));
+    m_sliceMenu->setTearOffEnabled(true);
+    m_rightButtonLayerMenu->addMenu(m_sliceMenu);
+
+    setupExistingLayersMenus();
+
+    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);
+}
+
+void
+MainWindow::setupTransformsMenu()
+{
+    if (m_transformsMenu) {
+        m_transformActions.clear();
+        m_transformActionsReverse.clear();
+        m_transformsMenu->clear();
+    } else {
+	m_transformsMenu = menuBar()->addMenu(tr("&Transform")); 
+        m_transformsMenu->setTearOffEnabled(true);
+   }
+
+    TransformFactory::TransformList transforms =
+	TransformFactory::getInstance()->getAllTransforms();
+
+    vector<QString> types =
+        TransformFactory::getInstance()->getAllTransformTypes();
+
+    map<QString, map<QString, SubdividingMenu *> > categoryMenus;
+    map<QString, map<QString, SubdividingMenu *> > makerMenus;
+
+    map<QString, SubdividingMenu *> byPluginNameMenus;
+    map<QString, map<QString, QMenu *> > pluginNameMenus;
+
+    set<SubdividingMenu *> pendingMenus;
+
+    m_recentTransformsMenu = m_transformsMenu->addMenu(tr("&Recent Transforms"));
+    m_recentTransformsMenu->setTearOffEnabled(true);
+    m_rightButtonTransformsMenu->addMenu(m_recentTransformsMenu);
+    connect(&m_recentTransforms, SIGNAL(recentChanged()),
+            this, SLOT(setupRecentTransformsMenu()));
+
+    m_transformsMenu->addSeparator();
+    m_rightButtonTransformsMenu->addSeparator();
+    
+    for (vector<QString>::iterator i = types.begin(); i != types.end(); ++i) {
+
+        if (i != types.begin()) {
+            m_transformsMenu->addSeparator();
+            m_rightButtonTransformsMenu->addSeparator();
+        }
+
+        QString byCategoryLabel = tr("%1 by Category").arg(*i);
+        SubdividingMenu *byCategoryMenu = new SubdividingMenu(byCategoryLabel,
+                                                              20, 40);
+        byCategoryMenu->setTearOffEnabled(true);
+        m_transformsMenu->addMenu(byCategoryMenu);
+        m_rightButtonTransformsMenu->addMenu(byCategoryMenu);
+        pendingMenus.insert(byCategoryMenu);
+
+        vector<QString> categories = 
+            TransformFactory::getInstance()->getTransformCategories(*i);
+
+        for (vector<QString>::iterator j = categories.begin();
+             j != categories.end(); ++j) {
+
+            QString category = *j;
+            if (category == "") category = tr("Unclassified");
+
+            if (categories.size() < 2) {
+                categoryMenus[*i][category] = byCategoryMenu;
+                continue;
+            }
+
+            QStringList components = category.split(" > ");
+            QString key;
+
+            for (QStringList::iterator k = components.begin();
+                 k != components.end(); ++k) {
+
+                QString parentKey = key;
+                if (key != "") key += " > ";
+                key += *k;
+
+                if (categoryMenus[*i].find(key) == categoryMenus[*i].end()) {
+                    SubdividingMenu *m = new SubdividingMenu(*k, 20, 40);
+                    m->setTearOffEnabled(true);
+                    pendingMenus.insert(m);
+                    categoryMenus[*i][key] = m;
+                    if (parentKey == "") {
+                        byCategoryMenu->addMenu(m);
+                    } else {
+                        categoryMenus[*i][parentKey]->addMenu(m);
+                    }
+                }
+            }
+        }
+
+        QString byPluginNameLabel = tr("%1 by Plugin Name").arg(*i);
+        byPluginNameMenus[*i] = new SubdividingMenu(byPluginNameLabel);
+        byPluginNameMenus[*i]->setTearOffEnabled(true);
+        m_transformsMenu->addMenu(byPluginNameMenus[*i]);
+        m_rightButtonTransformsMenu->addMenu(byPluginNameMenus[*i]);
+        pendingMenus.insert(byPluginNameMenus[*i]);
+
+        QString byMakerLabel = tr("%1 by Maker").arg(*i);
+        SubdividingMenu *byMakerMenu = new SubdividingMenu(byMakerLabel, 20, 40);
+        byMakerMenu->setTearOffEnabled(true);
+        m_transformsMenu->addMenu(byMakerMenu);
+        m_rightButtonTransformsMenu->addMenu(byMakerMenu);
+        pendingMenus.insert(byMakerMenu);
+
+        vector<QString> makers = 
+            TransformFactory::getInstance()->getTransformMakers(*i);
+
+        for (vector<QString>::iterator j = makers.begin();
+             j != makers.end(); ++j) {
+
+            QString maker = *j;
+            if (maker == "") maker = tr("Unknown");
+            maker.replace(QRegExp(tr(" [\\(<].*$")), "");
+
+            makerMenus[*i][maker] = new SubdividingMenu(maker, 30, 40);
+            makerMenus[*i][maker]->setTearOffEnabled(true);
+            byMakerMenu->addMenu(makerMenus[*i][maker]);
+            pendingMenus.insert(makerMenus[*i][maker]);
+        }
+    }
+
+    for (unsigned int i = 0; i < transforms.size(); ++i) {
+	
+	QString name = transforms[i].name;
+	if (name == "") name = transforms[i].identifier;
+
+//        std::cerr << "Plugin Name: " << name.toStdString() << std::endl;
+
+        QString type = transforms[i].type;
+
+        QString category = transforms[i].category;
+        if (category == "") category = tr("Unclassified");
+
+        QString maker = transforms[i].maker;
+        if (maker == "") maker = tr("Unknown");
+        maker.replace(QRegExp(tr(" [\\(<].*$")), "");
+
+        QString pluginName = name.section(": ", 0, 0);
+        QString output = name.section(": ", 1);
+
+	QAction *action = new QAction(tr("%1...").arg(name), this);
+	connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
+	m_transformActions[action] = transforms[i].identifier;
+        m_transformActionsReverse[transforms[i].identifier] = action;
+	connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
+
+        action->setStatusTip(transforms[i].description);
+
+        if (categoryMenus[type].find(category) == categoryMenus[type].end()) {
+            std::cerr << "WARNING: MainWindow::setupMenus: Internal error: "
+                      << "No category menu for transform \""
+                      << name.toStdString() << "\" (category = \""
+                      << category.toStdString() << "\")" << std::endl;
+        } else {
+            categoryMenus[type][category]->addAction(action);
+        }
+
+        if (makerMenus[type].find(maker) == makerMenus[type].end()) {
+            std::cerr << "WARNING: MainWindow::setupMenus: Internal error: "
+                      << "No maker menu for transform \""
+                      << name.toStdString() << "\" (maker = \""
+                      << maker.toStdString() << "\")" << std::endl;
+        } else {
+            makerMenus[type][maker]->addAction(action);
+        }
+
+        action = new QAction(tr("%1...").arg(output == "" ? pluginName : output), this);
+        connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
+        m_transformActions[action] = transforms[i].identifier;
+        connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
+        action->setStatusTip(transforms[i].description);
+
+//        cerr << "Transform: \"" << name.toStdString() << "\": plugin name \"" << pluginName.toStdString() << "\"" << endl;
+
+        if (pluginNameMenus[type].find(pluginName) ==
+            pluginNameMenus[type].end()) {
+
+            SubdividingMenu *parentMenu = byPluginNameMenus[type];
+            parentMenu->setTearOffEnabled(true);
+
+            if (output == "") {
+                parentMenu->addAction(pluginName, action);
+            } else {
+                pluginNameMenus[type][pluginName] = 
+                    parentMenu->addMenu(pluginName);
+                connect(this, SIGNAL(canAddLayer(bool)),
+                        pluginNameMenus[type][pluginName],
+                        SLOT(setEnabled(bool)));
+            }
+        }
+
+        if (pluginNameMenus[type].find(pluginName) !=
+            pluginNameMenus[type].end()) {
+            pluginNameMenus[type][pluginName]->addAction(action);
+        }
+    }
+
+    for (set<SubdividingMenu *>::iterator i = pendingMenus.begin();
+         i != pendingMenus.end(); ++i) {
+        (*i)->entriesAdded();
+    }
+
+    setupRecentTransformsMenu();
+}
+
+void
+MainWindow::setupHelpMenu()
+{
+    if (m_mainMenusCreated) return;
+
+    QMenu *menu = menuBar()->addMenu(tr("&Help"));
+    menu->setTearOffEnabled(true);
+    
+    QAction *action = new QAction(QIcon(":icons/help.png"),
+                                  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);
+}
+
+void
+MainWindow::setupRecentFilesMenu()
+{
+    m_recentFilesMenu->clear();
+    vector<QString> files = m_recentFiles.getRecent();
+    for (size_t i = 0; i < files.size(); ++i) {
+	QAction *action = new QAction(files[i], this);
+	connect(action, SIGNAL(triggered()), this, SLOT(openRecentFile()));
+	m_recentFilesMenu->addAction(action);
+    }
+}
+
+void
+MainWindow::setupRecentTransformsMenu()
+{
+    m_recentTransformsMenu->clear();
+    vector<QString> transforms = m_recentTransforms.getRecent();
+    for (size_t i = 0; i < transforms.size(); ++i) {
+        TransformActionReverseMap::iterator ti =
+            m_transformActionsReverse.find(transforms[i]);
+        if (ti == m_transformActionsReverse.end()) {
+            std::cerr << "WARNING: MainWindow::setupRecentTransformsMenu: "
+                      << "Unknown transform \"" << transforms[i].toStdString()
+                      << "\" in recent transforms list" << std::endl;
+            continue;
+        }
+	m_recentTransformsMenu->addAction(ti->second);
+    }
+}
+
+void
+MainWindow::setupExistingLayersMenus()
+{
+    if (!m_existingLayersMenu) return; // should have been created by setupMenus
+
+//    std::cerr << "MainWindow::setupExistingLayersMenu" << std::endl;
+
+    m_existingLayersMenu->clear();
+    m_existingLayerActions.clear();
+
+    m_sliceMenu->clear();
+    m_sliceActions.clear();
+
+    vector<Layer *> orderedLayers;
+    set<Layer *> observedLayers;
+    set<Layer *> sliceableLayers;
+
+    LayerFactory *factory = LayerFactory::getInstance();
+
+    for (int i = 0; i < m_paneStack->getPaneCount(); ++i) {
+
+	Pane *pane = m_paneStack->getPane(i);
+	if (!pane) continue;
+
+	for (int j = 0; j < pane->getLayerCount(); ++j) {
+
+	    Layer *layer = pane->getLayer(j);
+	    if (!layer) continue;
+	    if (observedLayers.find(layer) != observedLayers.end()) {
+//		std::cerr << "found duplicate layer " << layer << std::endl;
+		continue;
+	    }
+
+//	    std::cerr << "found new layer " << layer << " (name = " 
+//		      << layer->getLayerPresentationName().toStdString() << ")" << std::endl;
+
+	    orderedLayers.push_back(layer);
+	    observedLayers.insert(layer);
+
+            if (factory->isLayerSliceable(layer)) {
+                sliceableLayers.insert(layer);
+            }
+	}
+    }
+
+    map<QString, int> observedNames;
+
+    for (size_t i = 0; i < orderedLayers.size(); ++i) {
+	
+        Layer *layer = orderedLayers[i];
+
+	QString name = layer->getLayerPresentationName();
+	int n = ++observedNames[name];
+	if (n > 1) name = QString("%1 <%2>").arg(name).arg(n);
+
+	QIcon icon = QIcon(QString(":/icons/%1.png")
+                           .arg(factory->getLayerIconName
+                                (factory->getLayerType(layer))));
+
+	QAction *action = new QAction(icon, name, this);
+	connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
+	connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
+	m_existingLayerActions[action] = layer;
+
+	m_existingLayersMenu->addAction(action);
+
+        if (sliceableLayers.find(layer) != sliceableLayers.end()) {
+            action = new QAction(icon, name, this);
+            connect(action, SIGNAL(triggered()), this, SLOT(addLayer()));
+            connect(this, SIGNAL(canAddLayer(bool)), action, SLOT(setEnabled(bool)));
+            m_sliceActions[action] = layer;
+            m_sliceMenu->addAction(action);
+        }
+    }
+
+    m_sliceMenu->setEnabled(!m_sliceActions.empty());
+}
+
+void
+MainWindow::setupToolbars()
+{
+    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(m_viewManager, SIGNAL(playSelectionModeChanged(bool)),
+            action, SLOT(setChecked(bool)));
+    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(m_viewManager, SIGNAL(playLoopModeChanged(bool)),
+            action, SLOT(setChecked(bool)));
+    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"));
+    action->setStatusTip(tr("Navigate"));
+    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"));
+    action->setStatusTip(tr("Select ranges"));
+    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"));
+    action->setStatusTip(tr("Edit items in layer"));
+    connect(action, SIGNAL(triggered()), this, SLOT(toolEditSelected()));
+    connect(this, SIGNAL(canEditLayer(bool)), action, SLOT(setEnabled(bool)));
+    group->addAction(action);
+    m_toolActions[ViewManager::EditMode] = action;
+
+    action = toolbar->addAction(QIcon(":/icons/draw.png"),
+				tr("Draw"));
+    action->setCheckable(true);
+    action->setShortcut(tr("4"));
+    action->setStatusTip(tr("Draw new items in layer"));
+    connect(action, SIGNAL(triggered()), this, SLOT(toolDrawSelected()));
+    connect(this, SIGNAL(canEditLayer(bool)), action, SLOT(setEnabled(bool)));
+    group->addAction(action);
+    m_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()
+{
+    Pane *currentPane = 0;
+    Layer *currentLayer = 0;
+
+    if (m_paneStack) currentPane = m_paneStack->getCurrentPane();
+    if (currentPane) currentLayer = currentPane->getSelectedLayer();
+
+    bool haveCurrentPane =
+        (currentPane != 0);
+    bool haveCurrentLayer =
+        (haveCurrentPane &&
+         (currentLayer != 0));
+    bool haveMainModel =
+	(getMainModel() != 0);
+    bool havePlayTarget =
+	(m_playTarget != 0);
+    bool haveSelection = 
+	(m_viewManager &&
+	 !m_viewManager->getSelections().empty());
+    bool haveCurrentEditableLayer =
+	(haveCurrentLayer &&
+	 currentLayer->isLayerEditable());
+    bool haveCurrentTimeInstantsLayer = 
+	(haveCurrentLayer &&
+	 dynamic_cast<TimeInstantLayer *>(currentLayer));
+    bool haveCurrentTimeValueLayer = 
+	(haveCurrentLayer &&
+	 dynamic_cast<TimeValueLayer *>(currentLayer));
+    bool haveCurrentColour3DPlot =
+        (haveCurrentLayer &&
+         dynamic_cast<Colour3DPlotLayer *>(currentLayer));
+    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 canExportImage(haveMainModel && haveCurrentPane);
+    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 canInsertInstantsAtBoundaries(haveCurrentPane && haveSelection);
+    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 *p)
+{
+    updateMenuStates();
+    updateVisibleRangeDisplay(p);
+}
+
+void
+MainWindow::currentLayerChanged(Pane *p, Layer *)
+{
+    updateMenuStates();
+    updateVisibleRangeDisplay(p);
+}
+
+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();
+    insertInstantAt(frame);
+}
+
+void
+MainWindow::insertInstantsAtBoundaries()
+{
+    MultiSelection::SelectionList selections = m_viewManager->getSelections();
+    for (MultiSelection::SelectionList::iterator i = selections.begin();
+         i != selections.end(); ++i) {
+        size_t start = i->getStartFrame();
+        size_t end = i->getEndFrame();
+        if (start != end) {
+            insertInstantAt(i->getStartFrame());
+            insertInstantAt(i->getEndFrame());
+        }
+    }
+}
+
+void
+MainWindow::insertInstantAt(size_t frame)
+{
+    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 path = getOpenFileName(FileFinder::AudioFile);
+
+    if (path != "") {
+	if (openAudioFile(path, ReplaceMainModel) == FileOpenFailed) {
+	    QMessageBox::critical(this, tr("Failed to open file"),
+				  tr("Audio file \"%1\" could not be opened").arg(path));
+	}
+    }
+}
+
+void
+MainWindow::importMoreAudio()
+{
+    QString path = getOpenFileName(FileFinder::AudioFile);
+
+    if (path != "") {
+	if (openAudioFile(path, CreateAdditionalModel) == FileOpenFailed) {
+	    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 = getSaveFileName(FileFinder::AudioFile);
+    
+    if (path == "") return;
+
+    bool ok = false;
+    QString error;
+
+    MultiSelection ms = m_viewManager->getSelection();
+    MultiSelection::SelectionList selections = m_viewManager->getSelections();
+
+    bool multiple = false;
+
+    MultiSelection *selectionToWrite = 0;
+
+    if (selections.size() == 1) {
+
+	QStringList items;
+	items << tr("Export the selected region only")
+	      << tr("Export the whole audio file");
+	
+	bool ok = false;
+	QString item = ListInputDialog::getItem
+	    (this, tr("Select region to export"),
+	     tr("Which region from the original audio file do you want to export?"),
+	     items, 0, &ok);
+	
+	if (!ok || item.isEmpty()) return;
+	
+	if (item == items[0]) selectionToWrite = &ms;
+
+    } else if (selections.size() > 1) {
+
+	QStringList items;
+	items << tr("Export the selected regions into a single audio file")
+	      << tr("Export the selected regions into separate files")
+	      << tr("Export the whole audio file");
+
+	QString item = ListInputDialog::getItem
+	    (this, tr("Select region to export"),
+	     tr("Multiple regions of the original audio file are selected.\nWhat do you want to export?"),
+	     items, 0, &ok);
+	    
+	if (!ok || item.isEmpty()) return;
+
+	if (item == items[0]) {
+
+            selectionToWrite = &ms;
+
+        } else if (item == items[1]) {
+
+            multiple = true;
+
+	    int n = 1;
+	    QString base = path;
+	    base.replace(".wav", "");
+
+	    for (MultiSelection::SelectionList::iterator i = selections.begin();
+		 i != selections.end(); ++i) {
+
+		MultiSelection subms;
+		subms.setSelection(*i);
+
+		QString subpath = QString("%1.%2.wav").arg(base).arg(n);
+		++n;
+
+		if (QFileInfo(subpath).exists()) {
+		    error = tr("Fragment file %1 already exists, aborting").arg(subpath);
+		    break;
+		}
+
+		WavFileWriter subwriter(subpath,
+                                        getMainModel()->getSampleRate(),
+                                        getMainModel()->getChannelCount());
+                subwriter.writeModel(getMainModel(), &subms);
+		ok = subwriter.isOK();
+
+		if (!ok) {
+		    error = subwriter.getError();
+		    break;
+		}
+	    }
+	}
+    }
+
+    if (!multiple) {
+        WavFileWriter writer(path,
+                             getMainModel()->getSampleRate(),
+                             getMainModel()->getChannelCount());
+        writer.writeModel(getMainModel(), selectionToWrite);
+	ok = writer.isOK();
+	error = writer.getError();
+    }
+
+    if (ok) {
+        if (!multiple) {
+            m_recentFiles.addFile(path);
+        }
+    } else {
+	QMessageBox::critical(this, tr("Failed to write file"), error);
+    }
+}
+
+void
+MainWindow::importLayer()
+{
+    Pane *pane = m_paneStack->getCurrentPane();
+    
+    if (!pane) {
+	// shouldn't happen, as the menu action should have been disabled
+	std::cerr << "WARNING: MainWindow::importLayer: no current pane" << std::endl;
+	return;
+    }
+
+    if (!getMainModel()) {
+	// shouldn't happen, as the menu action should have been disabled
+	std::cerr << "WARNING: MainWindow::importLayer: No main model -- hence no default sample rate available" << std::endl;
+	return;
+    }
+
+    QString path = getOpenFileName(FileFinder::LayerFile);
+
+    if (path != "") {
+
+        if (openLayerFile(path) == FileOpenFailed) {
+            QMessageBox::critical(this, tr("Failed to open file"),
+                                  tr("File %1 could not be opened.").arg(path));
+            return;
+        }
+    }
+}
+
+MainWindow::FileOpenStatus
+MainWindow::openLayerFile(QString path)
+{
+    return openLayerFile(path, path);
+}
+
+MainWindow::FileOpenStatus
+MainWindow::openLayerFile(QString path, QString location)
+{
+    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 FileOpenFailed;
+    }
+
+    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 FileOpenFailed;
+    }
+
+    bool realFile = (location == path);
+
+    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("
+                      << location.toStdString()
+                      << "): Failed to open file for reading" << std::endl;
+            return FileOpenFailed;
+        }
+        
+        SVFileReader reader(m_document, callback, location);
+        reader.setCurrentPane(pane);
+        
+        QXmlInputSource inputSource(&file);
+        reader.parse(inputSource);
+        
+        if (!reader.isOK()) {
+            std::cerr << "ERROR: MainWindow::openLayerFile("
+                      << location.toStdString()
+                      << "): Failed to read XML file: "
+                      << reader.getErrorString().toStdString() << std::endl;
+            return FileOpenFailed;
+        }
+
+        m_recentFiles.addFile(location);
+
+        if (realFile) {
+            registerLastOpenedFilePath(FileFinder::LayerFile, path); // for file dialog
+        }
+
+        return FileOpenSucceeded;
+        
+    } else {
+        
+        Model *model = DataFileReaderFactory::load(path, getMainModel()->getSampleRate());
+        
+        if (model) {
+
+            Layer *newLayer = m_document->createImportedLayer(model);
+
+            if (newLayer) {
+
+                m_document->addLayerToView(pane, newLayer);
+                m_recentFiles.addFile(location);
+
+                if (realFile) {
+                    registerLastOpenedFilePath(FileFinder::LayerFile, path); // for file dialog
+                }
+
+                return FileOpenSucceeded;
+            }
+        }
+    }
+
+    return FileOpenFailed;
+}
+
+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 = getSaveFileName(FileFinder::LayerFile);
+
+    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 {
+        m_recentFiles.addFile(path);
+    }
+}
+
+void
+MainWindow::exportImage()
+{
+    Pane *pane = m_paneStack->getCurrentPane();
+    if (!pane) return;
+    
+    QString path = getSaveFileName(FileFinder::ImageFile);
+
+    if (path == "") return;
+
+    if (QFileInfo(path).suffix() == "") path += ".png";
+
+    bool haveSelection = m_viewManager && !m_viewManager->getSelections().empty();
+
+    QSize total, visible, selected;
+    total = pane->getImageSize();
+    visible = pane->getImageSize(pane->getFirstVisibleFrame(),
+                                 pane->getLastVisibleFrame());
+
+    size_t sf0 = 0, sf1 = 0;
+ 
+    if (haveSelection) {
+        MultiSelection::SelectionList selections = m_viewManager->getSelections();
+        sf0 = selections.begin()->getStartFrame();
+        MultiSelection::SelectionList::iterator e = selections.end();
+        --e;
+        sf1 = e->getEndFrame();
+        selected = pane->getImageSize(sf0, sf1);
+    }
+
+    QStringList items;
+    items << tr("Export the whole pane (%1x%2 pixels)")
+        .arg(total.width()).arg(total.height());
+    items << tr("Export the visible area only (%1x%2 pixels)")
+        .arg(visible.width()).arg(visible.height());
+    if (haveSelection) {
+        items << tr("Export the selection extent (%1x%2 pixels)")
+            .arg(selected.width()).arg(selected.height());
+    } else {
+        items << tr("Export the selection extent");
+    }
+
+    QSettings settings;
+    settings.beginGroup("MainWindow");
+    int deflt = settings.value("lastimageexportregion", 0).toInt();
+    if (deflt == 2 && !haveSelection) deflt = 1;
+    if (deflt == 0 && total.width() > 32767) deflt = 1;
+
+    ListInputDialog *lid = new ListInputDialog
+        (this, tr("Select region to export"),
+         tr("Which region of the current pane do you want to export as an image?"),
+         items, deflt);
+
+    if (!haveSelection) {
+        lid->setItemAvailability(2, false);
+    }
+    if (total.width() > 32767) { // appears to be the limit of a QImage
+        lid->setItemAvailability(0, false);
+        lid->setFootnote(tr("Note: the whole pane is too wide to be exported as a single image."));
+    }
+
+    bool ok = lid->exec();
+    QString item = lid->getCurrentString();
+    delete lid;
+	    
+    if (!ok || item.isEmpty()) return;
+
+    settings.setValue("lastimageexportregion", deflt);
+
+    QImage *image = 0;
+
+    if (item == items[0]) {
+        image = pane->toNewImage();
+    } else if (item == items[1]) {
+        image = pane->toNewImage(pane->getFirstVisibleFrame(),
+                                 pane->getLastVisibleFrame());
+    } else if (haveSelection) {
+        image = pane->toNewImage(sf0, sf1);
+    }
+
+    if (!image) return;
+
+    if (!image->save(path, "PNG")) {
+        QMessageBox::critical(this, tr("Failed to save image file"),
+                              tr("Failed to save image file %1").arg(path));
+    }
+    
+    delete image;
+}
+
+MainWindow::FileOpenStatus
+MainWindow::openAudioFile(QString path, AudioFileOpenMode mode)
+{
+    return openAudioFile(path, path, mode);
+}
+
+MainWindow::FileOpenStatus
+MainWindow::openAudioFile(QString path, QString location, AudioFileOpenMode mode)
+{
+    if (!(QFileInfo(path).exists() &&
+	  QFileInfo(path).isFile() &&
+	  QFileInfo(path).isReadable())) {
+	return FileOpenFailed;
+    }
+
+    m_openingAudioFile = true;
+
+    WaveFileModel *newModel = new WaveFileModel(path, location);
+
+    if (!newModel->isOK()) {
+	delete newModel;
+        m_openingAudioFile = false;
+	return FileOpenFailed;
+    }
+
+    bool setAsMain = true;
+    static bool prevSetAsMain = true;
+
+    bool realFile = (location == path);
+
+    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;
+                m_openingAudioFile = false;
+                return FileOpenCancelled;
+            }
+            
+            setAsMain = (item == items[0]);
+            prevSetAsMain = setAsMain;
+        }
+    }
+
+    if (setAsMain) {
+
+        Model *prevMain = getMainModel();
+        if (prevMain) {
+            m_playSource->removeModel(prevMain);
+            PlayParameterRepository::getInstance()->removeModel(prevMain);
+        }
+
+        PlayParameterRepository::getInstance()->addModel(newModel);
+
+	m_document->setMainModel(newModel);
+	setupMenus();
+
+	if (m_sessionFile == "") {
+	    setWindowTitle(tr("Sonic Visualiser: %1")
+			   .arg(QFileInfo(location).fileName()));
+	    CommandHistory::getInstance()->clear();
+	    CommandHistory::getInstance()->documentSaved();
+	    m_documentModified = false;
+	} else {
+	    setWindowTitle(tr("Sonic Visualiser: %1 [%2]")
+			   .arg(QFileInfo(m_sessionFile).fileName())
+			   .arg(QFileInfo(location).fileName()));
+	    if (m_documentModified) {
+		m_documentModified = false;
+		documentModified(); // so as to restore "(modified)" window title
+	    }
+	}
+
+        if (realFile) m_audioFile = path;
+
+    } else { // !setAsMain
+
+	CommandHistory::getInstance()->startCompoundOperation
+	    (tr("Import \"%1\"").arg(QFileInfo(location).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();
+    m_recentFiles.addFile(location);
+    if (realFile) {
+        registerLastOpenedFilePath(FileFinder::AudioFile, path); // for file dialog
+    }
+    m_openingAudioFile = false;
+
+    return FileOpenSucceeded;
+}
+
+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();
+}
+
+const WaveFileModel *
+MainWindow::getMainModel() const
+{
+    if (!m_document) return 0;
+    return m_document->getMainModel();
+}
+
+void
+MainWindow::newSession()
+{
+    if (!checkSaveModified()) return;
+
+    closeSession();
+    createDocument();
+
+    Pane *pane = m_paneStack->addPane();
+
+    connect(pane, SIGNAL(contextHelpChanged(const QString &)),
+            this, SLOT(contextHelpChanged(const QString &)));
+
+    if (!m_timeRulerLayer) {
+	m_timeRulerLayer = m_document->createMainModelLayer
+	    (LayerFactory::TimeRuler);
+    }
+
+    m_document->addLayerToView(pane, m_timeRulerLayer);
+
+    Layer *waveform = m_document->createMainModelLayer(LayerFactory::Waveform);
+    m_document->addLayerToView(pane, waveform);
+
+    m_overview->registerView(pane);
+
+    CommandHistory::getInstance()->clear();
+    CommandHistory::getInstance()->documentSaved();
+    documentRestored();
+    updateMenuStates();
+}
+
+void
+MainWindow::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, QString)),
+            this, SLOT(modelRegenerationFailed(QString, QString)));
+}
+
+void
+MainWindow::closeSession()
+{
+    if (!checkSaveModified()) return;
+
+    while (m_paneStack->getPaneCount() > 0) {
+
+	Pane *pane = m_paneStack->getPane(m_paneStack->getPaneCount() - 1);
+
+	while (pane->getLayerCount() > 0) {
+	    m_document->removeLayerFromView
+		(pane, pane->getLayer(pane->getLayerCount() - 1));
+	}
+
+	m_overview->unregisterView(pane);
+	m_paneStack->deletePane(pane);
+    }
+
+    while (m_paneStack->getHiddenPaneCount() > 0) {
+
+	Pane *pane = m_paneStack->getHiddenPane
+	    (m_paneStack->getHiddenPaneCount() - 1);
+
+	while (pane->getLayerCount() > 0) {
+	    m_document->removeLayerFromView
+		(pane, pane->getLayer(pane->getLayerCount() - 1));
+	}
+
+	m_overview->unregisterView(pane);
+	m_paneStack->deletePane(pane);
+    }
+
+    delete m_document;
+    m_document = 0;
+    m_viewManager->clearSelections();
+    m_timeRulerLayer = 0; // document owned this
+
+    m_sessionFile = "";
+    setWindowTitle(tr("Sonic Visualiser"));
+
+    CommandHistory::getInstance()->clear();
+    CommandHistory::getInstance()->documentSaved();
+    documentRestored();
+}
+
+void
+MainWindow::openSession()
+{
+    if (!checkSaveModified()) return;
+
+    QString orig = m_audioFile;
+    if (orig == "") orig = ".";
+    else orig = QFileInfo(orig).absoluteDir().canonicalPath();
+
+    QString path = getOpenFileName(FileFinder::SessionFile);
+
+    if (path.isEmpty()) return;
+
+    if (openSessionFile(path) == FileOpenFailed) {
+	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 path = getOpenFileName(FileFinder::AnyFile);
+
+    if (path.isEmpty()) return;
+
+    if (path.endsWith(".sv")) {
+
+        if (!checkSaveModified()) return;
+
+        if (openSessionFile(path) == FileOpenFailed) {
+            QMessageBox::critical(this, tr("Failed to open file"),
+                                  tr("Session file \"%1\" could not be opened").arg(path));
+        }
+
+    } else {
+
+        if (openAudioFile(path, AskUser) == FileOpenFailed) {
+
+            if (!canImportLayer || (openLayerFile(path) == FileOpenFailed)) {
+
+                QMessageBox::critical(this, tr("Failed to open file"),
+                                      tr("File \"%1\" could not be opened").arg(path));
+            }
+        }
+    }
+}
+
+void
+MainWindow::openLocation()
+{
+    QSettings settings;
+    settings.beginGroup("MainWindow");
+    QString lastLocation = settings.value("lastremote", "").toString();
+
+    bool ok = false;
+    QString text = QInputDialog::getText
+        (this, tr("Open Location"),
+         tr("Please enter the URL of the location to open:"),
+         QLineEdit::Normal, lastLocation, &ok);
+
+    if (!ok) return;
+
+    settings.setValue("lastremote", text);
+
+    if (text.isEmpty()) return;
+
+    if (openURL(QUrl(text)) == FileOpenFailed) {
+        QMessageBox::critical(this, tr("Failed to open location"),
+                              tr("URL \"%1\" could not be opened").arg(text));
+    }
+}
+
+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;
+
+    QUrl url(path);
+    if (RemoteFile::canHandleScheme(url)) {
+        openURL(url);
+        return;
+    }
+
+    if (path.endsWith("sv")) {
+
+        if (!checkSaveModified()) return;
+
+        if (openSessionFile(path) == FileOpenFailed) {
+            QMessageBox::critical(this, tr("Failed to open file"),
+                                  tr("Session file \"%1\" could not be opened").arg(path));
+        }
+
+    } else {
+
+        if (openAudioFile(path, AskUser) == FileOpenFailed) {
+
+            bool canImportLayer = (getMainModel() != 0 &&
+                                   m_paneStack != 0 &&
+                                   m_paneStack->getCurrentPane() != 0);
+
+            if (!canImportLayer || (openLayerFile(path) == FileOpenFailed)) {
+
+                QMessageBox::critical(this, tr("Failed to open file"),
+                                      tr("File \"%1\" could not be opened").arg(path));
+            }
+        }
+    }
+}
+
+MainWindow::FileOpenStatus
+MainWindow::openURL(QUrl url)
+{
+    if (url.scheme().toLower() == "file") {
+        return openSomeFile(url.toLocalFile());
+    } else if (!RemoteFile::canHandleScheme(url)) {
+        QMessageBox::critical(this, tr("Unsupported scheme in URL"),
+                              tr("The URL scheme \"%1\" is not supported")
+                              .arg(url.scheme()));
+        return FileOpenFailed;
+    } else {
+        RemoteFile rf(url);
+        rf.wait();
+        if (!rf.isOK()) {
+            QMessageBox::critical(this, tr("File download failed"),
+                                  tr("Failed to download URL \"%1\": %2")
+                                  .arg(url.toString()).arg(rf.getErrorString()));
+            return FileOpenFailed;
+        }
+        FileOpenStatus status;
+        if ((status = openSomeFile(rf.getLocalFilename(), url.toString())) !=
+            FileOpenSucceeded) {
+            rf.deleteLocalFile();
+        }
+        return status;
+    }
+}
+
+MainWindow::FileOpenStatus
+MainWindow::openSomeFile(QString path, AudioFileOpenMode mode)
+{
+    return openSomeFile(path, path, mode);
+}
+
+MainWindow::FileOpenStatus
+MainWindow::openSomeFile(QString path, QString location,
+                         AudioFileOpenMode mode)
+{
+    FileOpenStatus status;
+
+    bool canImportLayer = (getMainModel() != 0 &&
+                           m_paneStack != 0 &&
+                           m_paneStack->getCurrentPane() != 0);
+
+    if ((status = openAudioFile(path, location, mode)) != FileOpenFailed) {
+        return status;
+    } else if ((status = openSessionFile(path, location)) != FileOpenFailed) {
+	return status;
+    } else if (!canImportLayer) {
+        return FileOpenFailed;
+    } else if ((status = openLayerFile(path, location)) != FileOpenFailed) {
+        return status;
+    } else {
+	return FileOpenFailed;
+    }
+}
+
+MainWindow::FileOpenStatus
+MainWindow::openSessionFile(QString path)
+{
+    return openSessionFile(path, path);
+}
+
+MainWindow::FileOpenStatus
+MainWindow::openSessionFile(QString path, QString location)
+{
+    BZipFileDevice bzFile(path);
+    if (!bzFile.open(QIODevice::ReadOnly)) {
+        std::cerr << "Failed to open session file \"" << location.toStdString()
+                  << "\": " << bzFile.errorString().toStdString() << std::endl;
+        return FileOpenFailed;
+    }
+
+    if (!checkSaveModified()) return FileOpenCancelled;
+
+    QString error;
+    closeSession();
+    createDocument();
+
+    PaneCallback callback(this);
+    m_viewManager->clearSelections();
+
+    SVFileReader reader(m_document, callback, location);
+    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 == "");
+
+    bool realFile = (location == path);
+    
+    if (ok) {
+
+	setWindowTitle(tr("Sonic Visualiser: %1")
+		       .arg(QFileInfo(location).fileName()));
+
+	if (realFile) m_sessionFile = path;
+
+	setupMenus();
+	CommandHistory::getInstance()->clear();
+	CommandHistory::getInstance()->documentSaved();
+	m_documentModified = false;
+	updateMenuStates();
+
+        m_recentFiles.addFile(location);
+
+        if (realFile) {
+            registerLastOpenedFilePath(FileFinder::SessionFile, path); // for file dialog
+        }
+
+    } else {
+	setWindowTitle(tr("Sonic Visualiser"));
+    }
+
+    return ok ? FileOpenSucceeded : FileOpenFailed;
+}
+
+void
+MainWindow::closeEvent(QCloseEvent *e)
+{
+//    std::cerr << "MainWindow::closeEvent" << std::endl;
+
+    if (m_openingAudioFile) {
+//        std::cerr << "Busy - ignoring close event" << std::endl;
+	e->ignore();
+	return;
+    }
+
+    if (!m_abandoning && !checkSaveModified()) {
+//        std::cerr << "Ignoring close event" << std::endl;
+	e->ignore();
+	return;
+    }
+
+    QSettings settings;
+    settings.beginGroup("MainWindow");
+    settings.setValue("size", size());
+    settings.setValue("position", pos());
+    settings.endGroup();
+
+    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
+#ifndef _WIN32
+        QString fname = QString("tmp-%1-%2.sv")
+            .arg(QDateTime::currentDateTime().toString("yyyyMMddhhmmsszzz"))
+            .arg(QProcess().pid());
+#else
+        QString fname = QString("tmp-%1.sv")
+            .arg(QDateTime::currentDateTime().toString("yyyyMMddhhmmsszzz"));
+#endif
+        QString fpath = QDir(svDir).filePath(fname);
+        if (saveSessionFile(fpath)) {
+            m_recentFiles.addFile(fpath);
+            return true;
+        } else {
+            return false;
+        }
+    }
+}
+
+bool
+MainWindow::checkSaveModified()
+{
+    // Called before some destructive operation (e.g. new session,
+    // exit program).  Return true if we can safely proceed, false to
+    // cancel.
+
+    if (!m_documentModified) return true;
+
+    int button = 
+	QMessageBox::warning(this,
+			     tr("Session modified"),
+			     tr("The current session has been modified.\nDo you want to save it?"),
+			     QMessageBox::Yes,
+			     QMessageBox::No,
+			     QMessageBox::Cancel);
+
+    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 = getSaveFileName(FileFinder::SessionFile);
+
+    if (path == "") return;
+
+    if (!saveSessionFile(path)) {
+	QMessageBox::critical(this, tr("Failed to save file"),
+			      tr("Session file \"%1\" could not be saved.").arg(path));
+    } else {
+	setWindowTitle(tr("Sonic Visualiser: %1")
+		       .arg(QFileInfo(path).fileName()));
+	m_sessionFile = path;
+	CommandHistory::getInstance()->documentSaved();
+	documentRestored();
+        m_recentFiles.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.isOK()) {
+	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::showMinimalOverlays()
+{
+    m_viewManager->setOverlayMode(ViewManager::MinimalOverlays);
+}
+
+void
+MainWindow::showStandardOverlays()
+{
+    m_viewManager->setOverlayMode(ViewManager::StandardOverlays);
+}
+
+void
+MainWindow::showAllOverlays()
+{
+    m_viewManager->setOverlayMode(ViewManager::AllOverlays);
+}
+
+void
+MainWindow::toggleZoomWheels()
+{
+    if (m_viewManager->getZoomWheelsEnabled()) {
+        m_viewManager->setZoomWheelsEnabled(false);
+    } else {
+        m_viewManager->setZoomWheelsEnabled(true);
+    }
+}
+
+void
+MainWindow::togglePropertyBoxes()
+{
+    if (m_paneStack->getLayoutStyle() == PaneStack::NoPropertyStacks) {
+        if (Preferences::getInstance()->getPropertyBoxLayout() ==
+            Preferences::VerticallyStacked) {
+            m_paneStack->setLayoutStyle(PaneStack::PropertyStackPerPaneLayout);
+        } else {
+            m_paneStack->setLayoutStyle(PaneStack::SinglePropertyStackLayout);
+        }
+    } else {
+        m_paneStack->setLayoutStyle(PaneStack::NoPropertyStacks);
+    }
+}
+
+void
+MainWindow::toggleStatusBar()
+{
+    QSettings settings;
+    settings.beginGroup("MainWindow");
+    bool sb = settings.value("showstatusbar", true).toBool();
+
+    if (sb) {
+        statusBar()->hide();
+    } else {
+        statusBar()->show();
+    }
+
+    settings.setValue("showstatusbar", !sb);
+
+    settings.endGroup();
+}
+
+void
+MainWindow::preferenceChanged(PropertyContainer::PropertyName name)
+{
+    if (name == "Property Box Layout") {
+        if (m_paneStack->getLayoutStyle() != PaneStack::NoPropertyStacks) {
+            if (Preferences::getInstance()->getPropertyBoxLayout() ==
+                Preferences::VerticallyStacked) {
+                m_paneStack->setLayoutStyle(PaneStack::PropertyStackPerPaneLayout);
+            } else {
+                m_paneStack->setLayoutStyle(PaneStack::SinglePropertyStackLayout);
+            }
+        }
+    }
+}
+
+void
+MainWindow::play()
+{
+    if (m_playSource->isPlaying()) {
+        stop();
+    } else {
+        playbackFrameChanged(m_viewManager->getPlaybackFrame());
+	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();
+
+    if (m_paneStack && m_paneStack->getCurrentPane()) {
+        updateVisibleRangeDisplay(m_paneStack->getCurrentPane());
+    } else {
+        m_myStatusMessage = "";
+        statusBar()->showMessage("");
+    }
+}
+
+void
+MainWindow::addPane()
+{
+    QObject *s = sender();
+    QAction *action = dynamic_cast<QAction *>(s);
+    
+    if (!action) {
+	std::cerr << "WARNING: MainWindow::addPane: sender is not an action"
+		  << std::endl;
+	return;
+    }
+
+    PaneActionMap::iterator i = m_paneActions.find(action);
+
+    if (i == m_paneActions.end()) {
+	std::cerr << "WARNING: MainWindow::addPane: unknown action "
+		  << action->objectName().toStdString() << std::endl;
+	return;
+    }
+
+    addPane(i->second, action->text());
+}
+
+void
+MainWindow::addPane(const PaneConfiguration &configuration, QString text)
+{
+    CommandHistory::getInstance()->startCompoundOperation(text, true);
+
+    AddPaneCommand *command = new AddPaneCommand(this);
+    CommandHistory::getInstance()->addCommand(command);
+
+    Pane *pane = command->getPane();
+
+    if (configuration.layer == LayerFactory::Spectrum) {
+        pane->setPlaybackFollow(PlaybackScrollContinuous);
+        pane->setFollowGlobalZoom(false);
+        pane->setZoomLevel(512);
+    }
+
+    if (configuration.layer != LayerFactory::TimeRuler &&
+        configuration.layer != LayerFactory::Spectrum) {
+
+	if (!m_timeRulerLayer) {
+//	    std::cerr << "no time ruler layer, creating one" << std::endl;
+	    m_timeRulerLayer = m_document->createMainModelLayer
+		(LayerFactory::TimeRuler);
+	}
+
+//	std::cerr << "adding time ruler layer " << m_timeRulerLayer << std::endl;
+
+	m_document->addLayerToView(pane, m_timeRulerLayer);
+    }
+
+    Layer *newLayer = m_document->createLayer(configuration.layer);
+
+    Model *suggestedModel = configuration.sourceModel;
+    Model *model = 0;
+
+    if (suggestedModel) {
+
+        // check its validity
+        std::vector<Model *> inputModels = m_document->getTransformInputModels();
+        for (size_t j = 0; j < inputModels.size(); ++j) {
+            if (inputModels[j] == suggestedModel) {
+                model = suggestedModel;
+                break;
+            }
+        }
+
+        if (!model) {
+            std::cerr << "WARNING: Model " << (void *)suggestedModel
+                      << " appears in pane action map, but is not reported "
+                      << "by document as a valid transform source" << std::endl;
+        }
+    }
+
+    if (!model) model = m_document->getMainModel();
+
+    m_document->setModel(newLayer, model);
+
+    m_document->setChannel(newLayer, configuration.channel);
+    m_document->addLayerToView(pane, newLayer);
+
+    m_paneStack->setCurrentPane(pane);
+    m_paneStack->setCurrentLayer(pane, newLayer);
+
+//    std::cerr << "MainWindow::addPane: global centre frame is "
+//              << m_viewManager->getGlobalCentreFrame() << std::endl;
+//    pane->setCentreFrame(m_viewManager->getGlobalCentreFrame());
+
+    CommandHistory::getInstance()->endCompoundOperation();
+
+    updateMenuStates();
+}
+
+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();
+
+        connect(m_pane, SIGNAL(contextHelpChanged(const QString &)),
+                m_mw, SLOT(contextHelpChanged(const QString &)));
+    } else {
+	m_mw->m_paneStack->showPane(m_pane);
+    }
+
+    m_mw->m_paneStack->setCurrentPane(m_pane);
+    m_mw->m_overview->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_overview->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_overview->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_overview->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;
+    }
+
+    ei = m_sliceActions.find(action);
+
+    if (ei != m_sliceActions.end()) {
+        Layer *newLayer = m_document->createLayer(LayerFactory::Slice);
+//        document->setModel(newLayer, ei->second->getModel());
+        SliceableLayer *source = dynamic_cast<SliceableLayer *>(ei->second);
+        SliceLayer *dest = dynamic_cast<SliceLayer *>(newLayer);
+        if (source && dest) {
+            dest->setSliceableModel(source->getSliceableModel());
+            connect(source, SIGNAL(sliceableModelReplaced(const Model *, const Model *)),
+                    dest, SLOT(sliceableModelReplaced(const Model *, const Model *)));
+            connect(m_document, SIGNAL(modelAboutToBeDeleted(Model *)),
+                    dest, SLOT(modelAboutToBeDeleted(Model *)));
+        }
+	m_document->addLayerToView(pane, newLayer);
+	m_paneStack->setCurrentLayer(pane, newLayer);
+	return;
+    }
+
+    TransformActionMap::iterator i = m_transformActions.find(action);
+
+    if (i == m_transformActions.end()) {
+
+	LayerActionMap::iterator i = m_layerActions.find(action);
+	
+	if (i == m_layerActions.end()) {
+	    std::cerr << "WARNING: MainWindow::addLayer: unknown action "
+		      << action->objectName().toStdString() << std::endl;
+	    return;
+	}
+
+	LayerFactory::LayerType type = i->second;
+	
+	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;
+    }
+
+    TransformId 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;
+	}
+    }
+
+    // We always ask for configuration, even if the plugin isn't
+    // supposed to be configurable, because we need to let the user
+    // change the execution context (block size etc).
+
+    PluginTransform::ExecutionContext context(channel);
+
+    std::vector<Model *> candidateInputModels =
+        m_document->getTransformInputModels();
+
+    Model *inputModel = factory->getConfigurationForTransform(transform,
+                                                              candidateInputModels,
+                                                              context,
+                                                              configurationXml,
+                                                              m_playSource);
+    if (!inputModel) return;
+
+//    std::cerr << "MainWindow::addLayer: Input model is " << inputModel << " \"" << inputModel->objectName().toStdString() << "\"" << std::endl;
+
+    Layer *newLayer = m_document->createDerivedLayer(transform,
+                                                     inputModel,
+                                                     context,
+                                                     configurationXml);
+
+    if (newLayer) {
+        m_document->addLayerToView(pane, newLayer);
+        m_document->setChannel(newLayer, context.channel);
+        m_recentTransforms.add(transform);
+        m_paneStack->setCurrentLayer(pane, newLayer);
+    }
+
+    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);
+		setupExistingLayersMenus();
+	    }
+	}
+    }
+}
+
+void
+MainWindow::playSpeedChanged(int position)
+{
+    PlaySpeedRangeMapper mapper(0, 200);
+
+    float percent = m_playSpeed->mappedValue();
+
+    float factor = mapper.getFactorForValue(percent);
+
+//    float factor = mapper.getFactorForPosition(position);
+//    float percent = mapper.getValueForPosition(position);
+
+    std::cerr << "speed = " << position << " percent = " << percent << " factor = " << factor << std::endl;
+
+//!!!    bool slow = (position < 100);
+    bool something = (position != 100);
+/*!!!
+    int pc = lrintf(percent);
+
+    m_playSpeed->setToolTip(tr("Playback speed: %1%2%")
+                            .arg(!slow ? "+" : "")
+			    .arg(pc));
+*/
+    m_playSharpen->setEnabled(something);
+    m_playMono->setEnabled(something);
+    bool sharpen = (something && m_playSharpen->isChecked());
+    bool mono = (something && m_playMono->isChecked());
+    m_playSource->setTimeStretch(factor, sharpen, mono);
+}
+
+void
+MainWindow::playSharpenToggled()
+{
+    QSettings settings;
+    settings.beginGroup("MainWindow");
+    settings.setValue("playsharpen", m_playSharpen->isChecked());
+    settings.endGroup();
+
+    playSpeedChanged(m_playSpeed->value());
+}
+
+void
+MainWindow::playMonoToggled()
+{
+    QSettings settings;
+    settings.beginGroup("MainWindow");
+    settings.setValue("playmono", m_playMono->isChecked());
+    settings.endGroup();
+
+    playSpeedChanged(m_playSpeed->value());
+}    
+
+void
+MainWindow::playbackFrameChanged(unsigned long frame)
+{
+    if (!(m_playSource && m_playSource->isPlaying()) || !getMainModel()) return;
+
+    RealTime now = RealTime::frame2RealTime
+        (frame, getMainModel()->getSampleRate());
+
+    if (now.sec == m_lastPlayStatusSec) return;
+
+    RealTime then = RealTime::frame2RealTime
+        (m_playSource->getPlayEndFrame(), getMainModel()->getSampleRate());
+
+    QString nowStr;
+    QString thenStr;
+    QString remainingStr;
+
+    if (then.sec > 10) {
+        nowStr = now.toSecText().c_str();
+        thenStr = then.toSecText().c_str();
+        remainingStr = (then - now).toSecText().c_str();
+        m_lastPlayStatusSec = now.sec;
+    } else {
+        nowStr = now.toText(true).c_str();
+        thenStr = then.toText(true).c_str();
+        remainingStr = (then - now).toText(true).c_str();
+    }        
+
+    m_myStatusMessage = tr("Playing: %1 of %2 (%3 remaining)")
+        .arg(nowStr).arg(thenStr).arg(remainingStr);
+
+    statusBar()->showMessage(m_myStatusMessage);
+}
+
+void
+MainWindow::globalCentreFrameChanged(unsigned long )
+{
+    if ((m_playSource && m_playSource->isPlaying()) || !getMainModel()) return;
+    Pane *p = 0;
+    if (!m_paneStack || !(p = m_paneStack->getCurrentPane())) return;
+    if (!p->getFollowGlobalPan()) return;
+    updateVisibleRangeDisplay(p);
+}
+
+void
+MainWindow::viewCentreFrameChanged(View *v, unsigned long )
+{
+    if ((m_playSource && m_playSource->isPlaying()) || !getMainModel()) return;
+    Pane *p = 0;
+    if (!m_paneStack || !(p = m_paneStack->getCurrentPane())) return;
+    if (v == p) updateVisibleRangeDisplay(p);
+}
+
+void
+MainWindow::viewZoomLevelChanged(View *v, unsigned long , bool )
+{
+    if ((m_playSource && m_playSource->isPlaying()) || !getMainModel()) return;
+    Pane *p = 0;
+    if (!m_paneStack || !(p = m_paneStack->getCurrentPane())) return;
+    if (v == p) updateVisibleRangeDisplay(p);
+}
+
+void
+MainWindow::updateVisibleRangeDisplay(Pane *p) const
+{
+    if (!getMainModel() || !p) {
+        return;
+    }
+
+    bool haveSelection = false;
+    size_t startFrame = 0, endFrame = 0;
+
+    if (m_viewManager && m_viewManager->haveInProgressSelection()) {
+
+        bool exclusive = false;
+        Selection s = m_viewManager->getInProgressSelection(exclusive);
+
+        if (!s.isEmpty()) {
+            haveSelection = true;
+            startFrame = s.getStartFrame();
+            endFrame = s.getEndFrame();
+        }
+    }
+
+    if (!haveSelection) {
+        startFrame = p->getFirstVisibleFrame();
+        endFrame = p->getLastVisibleFrame();
+    }
+
+    RealTime start = RealTime::frame2RealTime
+        (startFrame, getMainModel()->getSampleRate());
+
+    RealTime end = RealTime::frame2RealTime
+        (endFrame, getMainModel()->getSampleRate());
+
+    RealTime duration = end - start;
+
+    QString startStr, endStr, durationStr;
+    startStr = start.toText(true).c_str();
+    endStr = end.toText(true).c_str();
+    durationStr = duration.toText(true).c_str();
+
+    if (haveSelection) {
+        m_myStatusMessage = tr("Selection: %1 to %2 (duration %3)")
+            .arg(startStr).arg(endStr).arg(durationStr);
+    } else {
+        m_myStatusMessage = tr("Visible: %1 to %2 (duration %3)")
+            .arg(startStr).arg(endStr).arg(durationStr);
+    }
+
+    statusBar()->showMessage(m_myStatusMessage);
+}
+
+void
+MainWindow::outputLevelsChanged(float left, float right)
+{
+    m_fader->setPeakLeft(left);
+    m_fader->setPeakRight(right);
+}
+
+void
+MainWindow::sampleRateMismatch(size_t requested, size_t actual,
+                               bool willResample)
+{
+    if (!willResample) {
+        //!!! 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 and pitch.")
+             .arg(requested).arg(actual));
+    }        
+
+    updateDescriptionLabel();
+}
+
+void
+MainWindow::audioOverloadPluginDisabled()
+{
+    QMessageBox::information
+        (this, tr("Audio processing overload"),
+         tr("Audio effects plugin auditioning has been disabled\ndue to a processing overload."));
+}
+
+void
+MainWindow::layerAdded(Layer *)
+{
+//    std::cerr << "MainWindow::layerAdded(" << layer << ")" << std::endl;
+//    setupExistingLayersMenu();
+    updateMenuStates();
+}
+
+void
+MainWindow::layerRemoved(Layer *)
+{
+//    std::cerr << "MainWindow::layerRemoved(" << layer << ")" << std::endl;
+    setupExistingLayersMenus();
+    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);
+        }
+    }
+
+    setupExistingLayersMenus();
+    updateMenuStates();
+}
+
+void
+MainWindow::modelAdded(Model *model)
+{
+//    std::cerr << "MainWindow::modelAdded(" << model << ")" << std::endl;
+    m_playSource->addModel(model);
+    if (dynamic_cast<DenseTimeValueModel *>(model)) {
+        setupPaneAndLayerMenus();
+    }
+}
+
+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 && m_audioOutput) createPlayTarget();
+}
+
+void
+MainWindow::modelAboutToBeDeleted(Model *model)
+{
+//    std::cerr << "MainWindow::modelAboutToBeDeleted(" << model << ")" << std::endl;
+    m_playSource->removeModel(model);
+    FFTDataServer::modelAboutToBeDeleted(model);
+}
+
+void
+MainWindow::modelGenerationFailed(QString transformName)
+{
+    QMessageBox::warning
+        (this,
+         tr("Failed to generate layer"),
+         tr("Failed to generate a derived layer.\n\nThe layer transform \"%1\" failed.\n\nThis probably means that a plugin failed to initialise, perhaps because it\nrejected the processing block size that was requested.")
+         .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\".\n\nThe layer transform \"%2\" failed to run.\n\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::propertyStacksResized()
+{
+/*
+    std::cerr << "MainWindow::propertyStacksResized" << std::endl;
+    Pane *pane = m_paneStack->getCurrentPane();
+    if (pane && m_overview) {
+        std::cerr << "Fixed width: "  << pane->width() << std::endl;
+        m_overview->setFixedWidth(pane->width());
+    }
+*/
+}
+
+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::pollOSC()
+{
+    if (!m_oscQueue || m_oscQueue->isEmpty()) return;
+    std::cerr << "MainWindow::pollOSC: have " << m_oscQueue->getMessagesAvailable() << " messages" << std::endl;
+
+    if (m_openingAudioFile) return;
+
+    OSCMessage message = m_oscQueue->readMessage();
+
+    if (message.getTarget() != 0) {
+        return; //!!! for now -- this class is target 0, others not handled yet
+    }
+
+    handleOSCMessage(message);
+}
+
+void
+MainWindow::handleOSCMessage(const OSCMessage &message)
+{
+    std::cerr << "MainWindow::handleOSCMessage: thread id = " 
+              << QThread::currentThreadId() << std::endl;
+
+    // This large function should really be abstracted out.
+
+    if (message.getMethod() == "open") {
+
+        if (message.getArgCount() == 1 &&
+            message.getArg(0).canConvert(QVariant::String)) {
+            QString path = message.getArg(0).toString();
+            if (openSomeFile(path, ReplaceMainModel) != FileOpenSucceeded) {
+                std::cerr << "MainWindow::handleOSCMessage: File open failed for path \""
+                          << path.toStdString() << "\"" << std::endl;
+            }
+            //!!! we really need to spin here and not return until the
+            // file has been completely decoded...
+        }
+
+    } else if (message.getMethod() == "openadditional") {
+
+        if (message.getArgCount() == 1 &&
+            message.getArg(0).canConvert(QVariant::String)) {
+            QString path = message.getArg(0).toString();
+            if (openSomeFile(path, CreateAdditionalModel) != FileOpenSucceeded) {
+                std::cerr << "MainWindow::handleOSCMessage: File open failed for path \""
+                          << path.toStdString() << "\"" << std::endl;
+            }
+        }
+
+    } else if (message.getMethod() == "recent" ||
+               message.getMethod() == "last") {
+
+        int n = 0;
+        if (message.getMethod() == "recent" &&
+            message.getArgCount() == 1 &&
+            message.getArg(0).canConvert(QVariant::Int)) {
+            n = message.getArg(0).toInt() - 1;
+        }
+        std::vector<QString> recent = m_recentFiles.getRecent();
+        if (n >= 0 && n < int(recent.size())) {
+            if (openSomeFile(recent[n], ReplaceMainModel) != FileOpenSucceeded) {
+                std::cerr << "MainWindow::handleOSCMessage: File open failed for path \""
+                          << recent[n].toStdString() << "\"" << std::endl;
+            }
+        }
+
+    } else if (message.getMethod() == "save") {
+
+        QString path;
+        if (message.getArgCount() == 1 &&
+            message.getArg(0).canConvert(QVariant::String)) {
+            path = message.getArg(0).toString();
+            if (QFileInfo(path).exists()) {
+                std::cerr << "MainWindow::handleOSCMessage: Refusing to overwrite existing file in save" << std::endl;
+            } else {
+                saveSessionFile(path);
+            }
+        }
+
+    } else if (message.getMethod() == "export") {
+
+        QString path;
+        if (getMainModel()) {
+            if (message.getArgCount() == 1 &&
+                message.getArg(0).canConvert(QVariant::String)) {
+                path = message.getArg(0).toString();
+                if (QFileInfo(path).exists()) {
+                    std::cerr << "MainWindow::handleOSCMessage: Refusing to overwrite existing file in export" << std::endl;
+                } else {
+                    WavFileWriter writer(path,
+                                         getMainModel()->getSampleRate(),
+                                         getMainModel()->getChannelCount());
+                    MultiSelection ms = m_viewManager->getSelection();
+                    if (!ms.getSelections().empty()) {
+                        writer.writeModel(getMainModel(), &ms);
+                    } else {
+                        writer.writeModel(getMainModel());
+                    }
+                }
+            }
+        }
+
+    } else if (message.getMethod() == "jump" ||
+               message.getMethod() == "play") {
+
+        if (getMainModel()) {
+
+            unsigned long frame = m_viewManager->getPlaybackFrame();
+            bool selection = false;
+            bool play = (message.getMethod() == "play");
+
+            if (message.getArgCount() == 1) {
+
+                if (message.getArg(0).canConvert(QVariant::String) &&
+                    message.getArg(0).toString() == "selection") {
+
+                    selection = true;
+
+                } else if (message.getArg(0).canConvert(QVariant::String) &&
+                           message.getArg(0).toString() == "end") {
+
+                    frame = getMainModel()->getEndFrame();
+
+                } else if (message.getArg(0).canConvert(QVariant::Double)) {
+
+                    double time = message.getArg(0).toDouble();
+                    if (time < 0.0) time = 0.0;
+
+                    frame = lrint(time * getMainModel()->getSampleRate());
+                }
+            }
+
+            if (frame > getMainModel()->getEndFrame()) {
+                frame = getMainModel()->getEndFrame();
+            }
+
+            if (play) {
+                m_viewManager->setPlaySelectionMode(selection);
+            } 
+
+            if (selection) {
+                MultiSelection::SelectionList sl = m_viewManager->getSelections();
+                if (!sl.empty()) {
+                    frame = sl.begin()->getStartFrame();
+                }
+            }
+
+            m_viewManager->setPlaybackFrame(frame);
+
+            if (play && !m_playSource->isPlaying()) {
+                m_playSource->play(frame);
+            }
+        }
+
+    } else if (message.getMethod() == "stop") {
+            
+        if (m_playSource->isPlaying()) m_playSource->stop();
+
+    } else if (message.getMethod() == "loop") {
+
+        if (message.getArgCount() == 1 &&
+            message.getArg(0).canConvert(QVariant::String)) {
+
+            QString str = message.getArg(0).toString();
+            if (str == "on") {
+                m_viewManager->setPlayLoopMode(true);
+            } else if (str == "off") {
+                m_viewManager->setPlayLoopMode(false);
+            }
+        }
+
+    } else if (message.getMethod() == "select" ||
+               message.getMethod() == "addselect") {
+
+        if (getMainModel()) {
+
+            int f0 = getMainModel()->getStartFrame();
+            int f1 = getMainModel()->getEndFrame();
+
+            bool done = false;
+
+            if (message.getArgCount() == 2 &&
+                message.getArg(0).canConvert(QVariant::Double) &&
+                message.getArg(1).canConvert(QVariant::Double)) {
+                
+                double t0 = message.getArg(0).toDouble();
+                double t1 = message.getArg(1).toDouble();
+                if (t1 < t0) { double temp = t0; t0 = t1; t1 = temp; }
+                if (t0 < 0.0) t0 = 0.0;
+                if (t1 < 0.0) t1 = 0.0;
+
+                f0 = lrint(t0 * getMainModel()->getSampleRate());
+                f1 = lrint(t1 * getMainModel()->getSampleRate());
+                
+                Pane *pane = m_paneStack->getCurrentPane();
+                Layer *layer = 0;
+                if (pane) layer = pane->getSelectedLayer();
+                if (layer) {
+                    size_t resolution;
+                    layer->snapToFeatureFrame(pane, f0, resolution,
+                                              Layer::SnapLeft);
+                    layer->snapToFeatureFrame(pane, f1, resolution,
+                                              Layer::SnapRight);
+                }
+
+            } else if (message.getArgCount() == 1 &&
+                       message.getArg(0).canConvert(QVariant::String)) {
+
+                QString str = message.getArg(0).toString();
+                if (str == "none") {
+                    m_viewManager->clearSelections();
+                    done = true;
+                }
+            }
+
+            if (!done) {
+                if (message.getMethod() == "select") {
+                    m_viewManager->setSelection(Selection(f0, f1));
+                } else {
+                    m_viewManager->addSelection(Selection(f0, f1));
+                }
+            }
+        }
+
+    } else if (message.getMethod() == "add") {
+
+        if (getMainModel()) {
+
+            if (message.getArgCount() >= 1 &&
+                message.getArg(0).canConvert(QVariant::String)) {
+
+                int channel = -1;
+                if (message.getArgCount() == 2 &&
+                    message.getArg(0).canConvert(QVariant::Int)) {
+                    channel = message.getArg(0).toInt();
+                    if (channel < -1 ||
+                        channel > int(getMainModel()->getChannelCount())) {
+                        std::cerr << "WARNING: MainWindow::handleOSCMessage: channel "
+                                  << channel << " out of range" << std::endl;
+                        channel = -1;
+                    }
+                }
+
+                QString str = message.getArg(0).toString();
+                
+                LayerFactory::LayerType type =
+                    LayerFactory::getInstance()->getLayerTypeForName(str);
+
+                if (type == LayerFactory::UnknownLayer) {
+                    std::cerr << "WARNING: MainWindow::handleOSCMessage: unknown layer "
+                              << "type " << str.toStdString() << std::endl;
+                } else {
+
+                    PaneConfiguration configuration(type,
+                                                    getMainModel(),
+                                                    channel);
+                    
+                    addPane(configuration,
+                            tr("Add %1 Pane")
+                            .arg(LayerFactory::getInstance()->
+                                 getLayerPresentationName(type)));
+                }
+            }
+        }
+
+    } else if (message.getMethod() == "undo") {
+
+        CommandHistory::getInstance()->undo();
+
+    } else if (message.getMethod() == "redo") {
+
+        CommandHistory::getInstance()->redo();
+
+    } else if (message.getMethod() == "set") {
+
+        if (message.getArgCount() == 2 &&
+            message.getArg(0).canConvert(QVariant::String) &&
+            message.getArg(1).canConvert(QVariant::Double)) {
+
+            QString property = message.getArg(0).toString();
+            float value = (float)message.getArg(1).toDouble();
+
+            if (property == "gain") {
+                if (value < 0.0) value = 0.0;
+                m_fader->setValue(value);
+                if (m_playTarget) m_playTarget->setOutputGain(value);
+            } else if (property == "speedup") {
+                m_playSpeed->setMappedValue(value);
+            } else if (property == "overlays") {
+                if (value < 0.5) {
+                    m_viewManager->setOverlayMode(ViewManager::NoOverlays);
+                } else if (value < 1.5) {
+                    m_viewManager->setOverlayMode(ViewManager::MinimalOverlays);
+                } else if (value < 2.5) {
+                    m_viewManager->setOverlayMode(ViewManager::StandardOverlays);
+                } else {
+                    m_viewManager->setOverlayMode(ViewManager::AllOverlays);
+                }                    
+            } else if (property == "zoomwheels") {
+                m_viewManager->setZoomWheelsEnabled(value > 0.5);
+            } else if (property == "propertyboxes") {
+                bool toggle = ((value < 0.5) !=
+                               (m_paneStack->getLayoutStyle() == PaneStack::NoPropertyStacks));
+                if (toggle) togglePropertyBoxes();
+            }
+                
+        } else {
+            PropertyContainer *container = 0;
+            Pane *pane = m_paneStack->getCurrentPane();
+            if (pane &&
+                message.getArgCount() == 3 &&
+                message.getArg(0).canConvert(QVariant::String) &&
+                message.getArg(1).canConvert(QVariant::String) &&
+                message.getArg(2).canConvert(QVariant::String)) {
+                if (message.getArg(0).toString() == "pane") {
+                    container = pane->getPropertyContainer(0);
+                } else if (message.getArg(0).toString() == "layer") {
+                    container = pane->getSelectedLayer();
+                }
+            }
+            if (container) {
+                QString nameString = message.getArg(1).toString();
+                QString valueString = message.getArg(2).toString();
+                container->setPropertyWithCommand(nameString, valueString);
+            }
+        }
+
+    } else if (message.getMethod() == "setcurrent") {
+
+        int paneIndex = -1, layerIndex = -1;
+        bool wantLayer = false;
+
+        if (message.getArgCount() >= 1 &&
+            message.getArg(0).canConvert(QVariant::Int)) {
+
+            paneIndex = message.getArg(0).toInt() - 1;
+
+            if (message.getArgCount() >= 2 &&
+                message.getArg(1).canConvert(QVariant::Int)) {
+                wantLayer = true;
+                layerIndex = message.getArg(1).toInt() - 1;
+            }
+        }
+
+        if (paneIndex >= 0 && paneIndex < m_paneStack->getPaneCount()) {
+            Pane *pane = m_paneStack->getPane(paneIndex);
+            m_paneStack->setCurrentPane(pane);
+            if (layerIndex >= 0 && layerIndex < pane->getLayerCount()) {
+                Layer *layer = pane->getLayer(layerIndex);
+                m_paneStack->setCurrentLayer(pane, layer);
+            } else if (wantLayer && layerIndex == -1) {
+                m_paneStack->setCurrentLayer(pane, 0);
+            }
+        }
+
+    } else if (message.getMethod() == "delete") {
+
+        if (message.getArgCount() == 1 &&
+            message.getArg(0).canConvert(QVariant::String)) {
+            
+            QString target = message.getArg(0).toString();
+
+            if (target == "pane") {
+
+                deleteCurrentPane();
+
+            } else if (target == "layer") {
+
+                deleteCurrentLayer();
+
+            } else {
+                
+                std::cerr << "WARNING: MainWindow::handleOSCMessage: Unknown delete target " << target.toStdString() << std::endl;
+            }
+        }
+
+    } else if (message.getMethod() == "zoom") {
+
+        if (message.getArgCount() == 1) {
+            if (message.getArg(0).canConvert(QVariant::String) &&
+                message.getArg(0).toString() == "in") {
+                zoomIn();
+            } else if (message.getArg(0).canConvert(QVariant::String) &&
+                       message.getArg(0).toString() == "out") {
+                zoomOut();
+            } else if (message.getArg(0).canConvert(QVariant::String) &&
+                       message.getArg(0).toString() == "default") {
+                zoomDefault();
+            } else if (message.getArg(0).canConvert(QVariant::Double)) {
+                double level = message.getArg(0).toDouble();
+                Pane *currentPane = m_paneStack->getCurrentPane();
+                if (level < 1.0) level = 1.0;
+                if (currentPane) currentPane->setZoomLevel(lrint(level));
+            }
+        }
+
+    } else if (message.getMethod() == "zoomvertical") {
+
+        Pane *pane = m_paneStack->getCurrentPane();
+        Layer *layer = 0;
+        if (pane && pane->getLayerCount() > 0) {
+            layer = pane->getLayer(pane->getLayerCount() - 1);
+        }
+        int defaultStep = 0;
+        int steps = 0;
+        if (layer) {
+            steps = layer->getVerticalZoomSteps(defaultStep);
+            if (message.getArgCount() == 1 && steps > 0) {
+                if (message.getArg(0).canConvert(QVariant::String) &&
+                    message.getArg(0).toString() == "in") {
+                    int step = layer->getCurrentVerticalZoomStep() + 1;
+                    if (step < steps) layer->setVerticalZoomStep(step);
+                } else if (message.getArg(0).canConvert(QVariant::String) &&
+                           message.getArg(0).toString() == "out") {
+                    int step = layer->getCurrentVerticalZoomStep() - 1;
+                    if (step >= 0) layer->setVerticalZoomStep(step);
+                } else if (message.getArg(0).canConvert(QVariant::String) &&
+                           message.getArg(0).toString() == "default") {
+                    layer->setVerticalZoomStep(defaultStep);
+                }
+            } else if (message.getArgCount() == 2) {
+                if (message.getArg(0).canConvert(QVariant::Double) &&
+                    message.getArg(1).canConvert(QVariant::Double)) {
+                    double min = message.getArg(0).toDouble();
+                    double max = message.getArg(1).toDouble();
+                    layer->setDisplayExtents(min, max);
+                }
+            }
+        }
+
+    } else if (message.getMethod() == "quit") {
+        
+        m_abandoning = true;
+        close();
+
+    } else if (message.getMethod() == "resize") {
+        
+        if (message.getArgCount() == 2) {
+
+            int width = 0, height = 0;
+
+            if (message.getArg(1).canConvert(QVariant::Int)) {
+
+                height = message.getArg(1).toInt();
+
+                if (message.getArg(0).canConvert(QVariant::String) &&
+                    message.getArg(0).toString() == "pane") {
+
+                    Pane *pane = m_paneStack->getCurrentPane();
+                    if (pane) pane->resize(pane->width(), height);
+
+                } else if (message.getArg(0).canConvert(QVariant::Int)) {
+
+                    width = message.getArg(0).toInt();
+                    resize(width, height);
+                }
+            }
+        }
+
+    } else if (message.getMethod() == "transform") {
+
+        Pane *pane = m_paneStack->getCurrentPane();
+
+        if (getMainModel() &&
+            pane &&
+            message.getArgCount() == 1 &&
+            message.getArg(0).canConvert(QVariant::String)) {
+
+            TransformId transform = message.getArg(0).toString();
+
+            Layer *newLayer = m_document->createDerivedLayer
+                (transform,
+                 getMainModel(),
+                 TransformFactory::getInstance()->getDefaultContextForTransform
+                 (transform, getMainModel()),
+                 "");
+
+            if (newLayer) {
+                m_document->addLayerToView(pane, newLayer);
+                m_recentTransforms.add(transform);
+                m_paneStack->setCurrentLayer(pane, newLayer);
+            }
+        }
+
+    } else {
+        std::cerr << "WARNING: MainWindow::handleOSCMessage: Unknown or unsupported "
+                  << "method \"" << message.getMethod().toStdString()
+                  << "\"" << std::endl;
+    }
+            
+}
+
+void
+MainWindow::preferences()
+{
+    if (!m_preferencesDialog.isNull()) {
+        m_preferencesDialog->show();
+        m_preferencesDialog->raise();
+        return;
+    }
+
+    m_preferencesDialog = new PreferencesDialog(this);
+
+    // DeleteOnClose is safe here, because m_preferencesDialog is a
+    // QPointer that will be zeroed when the dialog is deleted.  We
+    // use it in preference to leaving the dialog lying around because
+    // if you Cancel the dialog, it resets the preferences state
+    // without resetting its own widgets, so its state will be
+    // incorrect when next shown unless we construct it afresh
+    m_preferencesDialog->setAttribute(Qt::WA_DeleteOnClose);
+
+    m_preferencesDialog->show();
+}
+
+void
+MainWindow::mouseEnteredWidget()
+{
+    QWidget *w = dynamic_cast<QWidget *>(sender());
+    if (!w) return;
+
+    if (w == m_fader) {
+        contextHelpChanged(tr("Adjust the master playback level"));
+    } else if (w == m_playSpeed) {
+        contextHelpChanged(tr("Adjust the master playback speed"));
+    } else if (w == m_playSharpen && w->isEnabled()) {
+        contextHelpChanged(tr("Toggle transient sharpening for playback time scaling"));
+    } else if (w == m_playMono && w->isEnabled()) {
+        contextHelpChanged(tr("Toggle mono mode for playback time scaling"));
+    }
+}
+
+void
+MainWindow::mouseLeftWidget()
+{
+    contextHelpChanged("");
+}
+
+void
+MainWindow::inProgressSelectionChanged()
+{
+    Pane *currentPane = 0;
+    if (m_paneStack) currentPane = m_paneStack->getCurrentPane();
+    if (currentPane) updateVisibleRangeDisplay(currentPane);
+}
+
+void
+MainWindow::contextHelpChanged(const QString &s)
+{
+    if (s == "" && m_myStatusMessage != "") {
+        statusBar()->showMessage(m_myStatusMessage);
+        return;
+    }
+    statusBar()->showMessage(s);
+}
+
+void
+MainWindow::website()
+{
+    openHelpUrl(tr("http://www.sonicvisualiser.org/"));
+}
+
+void
+MainWindow::help()
+{
+    openHelpUrl(tr("http://www.sonicvisualiser.org/doc/reference/1.0/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<br>semantic music analysis and annotation.</p>");
+    aboutText += tr("<p>%1 : %2 configuration</p>")
+        .arg(version)
+        .arg(debug ? tr("Debug") : tr("Release"));
+
+#ifndef BUILD_STATIC
+    aboutText += tr("<br>Using Qt v%1 &copy; Trolltech AS").arg(QT_VERSION_STR);
+#else
+#ifdef QT_SHARED
+    aboutText += tr("<br>Using Qt v%1 &copy; Trolltech AS").arg(QT_VERSION_STR);
+#endif
+#endif
+
+#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
+#ifdef JACK_VERSION
+    aboutText += tr("<br>With JACK audio output (v%1) &copy; Paul Davis and Jack O'Quin").arg(JACK_VERSION);
+#else
+    aboutText += tr("<br>With JACK audio output &copy; Paul Davis and Jack O'Quin");
+#endif
+#endif
+#ifdef HAVE_PORTAUDIO
+    aboutText += tr("<br>With PortAudio audio output &copy; Ross Bencina and Phil Burk");
+#endif
+#ifdef HAVE_OGGZ
+#ifdef OGGZ_VERSION
+    aboutText += tr("<br>With Ogg file decoder (oggz v%1, fishsound v%2) &copy; CSIRO Australia").arg(OGGZ_VERSION).arg(FISHSOUND_VERSION);
+#else
+    aboutText += tr("<br>With Ogg file decoder &copy; CSIRO Australia");
+#endif
+#endif
+#ifdef HAVE_MAD
+#ifdef MAD_VERSION
+    aboutText += tr("<br>With MAD mp3 decoder (v%1) &copy; Underbit Technologies Inc").arg(MAD_VERSION);
+#else
+    aboutText += tr("<br>With MAD mp3 decoder &copy; Underbit Technologies Inc");
+#endif
+#endif
+#ifdef HAVE_SAMPLERATE
+#ifdef SAMPLERATE_VERSION
+    aboutText += tr("<br>With libsamplerate (v%1) &copy; Erik de Castro Lopo").arg(SAMPLERATE_VERSION);
+#else
+    aboutText += tr("<br>With libsamplerate &copy; Erik de Castro Lopo");
+#endif
+#endif
+#ifdef HAVE_SNDFILE
+#ifdef SNDFILE_VERSION
+    aboutText += tr("<br>With libsndfile (v%1) &copy; Erik de Castro Lopo").arg(SNDFILE_VERSION);
+#else
+    aboutText += tr("<br>With libsndfile &copy; Erik de Castro Lopo");
+#endif
+#endif
+#ifdef HAVE_FFTW3F
+#ifdef FFTW3_VERSION
+    aboutText += tr("<br>With FFTW3 (v%1) &copy; Matteo Frigo and MIT").arg(FFTW3_VERSION);
+#else
+    aboutText += tr("<br>With FFTW3 &copy; Matteo Frigo and MIT");
+#endif
+#endif
+#ifdef HAVE_VAMP
+    aboutText += tr("<br>With Vamp plugin support (API v%1, host SDK v%2) &copy; Chris Cannam").arg(VAMP_API_VERSION).arg(VAMP_SDK_VERSION);
+#endif
+    aboutText += tr("<br>With LADSPA plugin support (API v%1) &copy; Richard Furse, Paul Davis, Stefan Westerfeld").arg(LADSPA_VERSION);
+    aboutText += tr("<br>With DSSI plugin support (API v%1) &copy; Chris Cannam, Steve Harris, Sean Bolton").arg(DSSI_VERSION);
+#ifdef HAVE_LIBLO
+#ifdef LIBLO_VERSION
+    aboutText += tr("<br>With liblo Lite OSC library (v%1) &copy; Steve Harris").arg(LIBLO_VERSION);
+#else
+    aboutText += tr("<br>With liblo Lite OSC library &copy; Steve Harris").arg(LIBLO_VERSION);
+#endif
+    if (m_oscQueue && m_oscQueue->isOK()) {
+        aboutText += tr("<p>The OSC URL for this instance is: \"%1\"").arg(m_oscQueue->getOSCURL());
+    }
+#endif
+    aboutText += "</p>";
+#endif
+
+    aboutText += 
+        "<p>Sonic Visualiser Copyright &copy; 2005 - 2007 Chris Cannam and<br>"
+        "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);
+}
+