view framework/MainWindowBase.cpp @ 304:c837368b1faf

Remove OSC option from constructor -- call startOSCQueue() after construction if you want it.
This needs to be handled this way in SV because we need to ask for network permission before opening the OSC port (that's the thing that gets the app blocked by e.g. Windows Firewall).

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

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

#include "MainWindowBase.h"
#include "Document.h"


#include "view/Pane.h"
#include "view/PaneStack.h"
#include "data/model/WaveFileModel.h"
#include "data/model/SparseOneDimensionalModel.h"
#include "data/model/NoteModel.h"
#include "data/model/Labeller.h"
#include "data/model/TabularModel.h"
#include "view/ViewManager.h"

#include "layer/WaveformLayer.h"
#include "layer/TimeRulerLayer.h"
#include "layer/TimeInstantLayer.h"
#include "layer/TimeValueLayer.h"
#include "layer/Colour3DPlotLayer.h"
#include "layer/SliceLayer.h"
#include "layer/SliceableLayer.h"
#include "layer/ImageLayer.h"
#include "layer/NoteLayer.h"
#include "layer/RegionLayer.h"

#include "widgets/ListInputDialog.h"
#include "widgets/CommandHistory.h"
#include "widgets/ProgressDialog.h"
#include "widgets/MIDIFileImportDialog.h"
#include "widgets/CSVFormatDialog.h"
#include "widgets/ModelDataTableDialog.h"

#include "audioio/AudioCallbackPlaySource.h"
#include "audioio/AudioCallbackPlayTarget.h"
#include "audioio/AudioTargetFactory.h"
#include "audioio/PlaySpeedRangeMapper.h"
#include "data/fileio/DataFileReaderFactory.h"
#include "data/fileio/PlaylistFileReader.h"
#include "data/fileio/WavFileWriter.h"
#include "data/fileio/CSVFileWriter.h"
#include "data/fileio/MIDIFileWriter.h"
#include "data/fileio/BZipFileDevice.h"
#include "data/fileio/FileSource.h"
#include "data/fileio/AudioFileReaderFactory.h"
#include "rdf/RDFImporter.h"

#include "data/fft/FFTDataServer.h"

#include "base/RecentFiles.h"

#include "base/PlayParameterRepository.h"
#include "base/XmlExportable.h"
#include "base/Profiler.h"
#include "base/Preferences.h"
#include "base/TempWriteFile.h"
#include "base/Exceptions.h"
#include "base/ResourceFinder.h"

#include "data/osc/OSCQueue.h"
#include "data/midi/MIDIInput.h"

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

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




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

#ifdef Q_WS_X11
#define Window X11Window
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/SM/SMlib.h>

static int handle_x11_error(Display *dpy, XErrorEvent *err)
{
    char errstr[256];
    XGetErrorText(dpy, err->error_code, errstr, 256);
    if (err->error_code != BadWindow) {
	cerr << "Sonic Visualiser: X Error: "
		  << errstr << " " << int(err->error_code)
		  << "\nin major opcode:  "
		  << int(err->request_code) << endl;
    }
    return 0;
}
#undef Window
#endif

MainWindowBase::MainWindowBase(bool withAudioOutput,
                               bool withMIDIInput) :
    m_document(0),
    m_paneStack(0),
    m_viewManager(0),
    m_timeRulerLayer(0),
    m_audioOutput(withAudioOutput),
    m_playSource(0),
    m_playTarget(0),
    m_oscQueue(0),
    m_oscQueueStarter(0),
    m_midiInput(0),
    m_recentFiles("RecentFiles", 20),
    m_recentTransforms("RecentTransforms", 20),
    m_documentModified(false),
    m_openingAudioFile(false),
    m_abandoning(false),
    m_labeller(0),
    m_lastPlayStatusSec(0)
{
    Profiler profiler("MainWindowBase::MainWindowBase");

#ifdef Q_WS_X11
    XSetErrorHandler(handle_x11_error);
#endif

    connect(CommandHistory::getInstance(), SIGNAL(commandExecuted()),
	    this, SLOT(documentModified()));
    connect(CommandHistory::getInstance(), SIGNAL(documentRestored()),
	    this, SLOT(documentRestored()));
    
    m_viewManager = new ViewManager();
    connect(m_viewManager, SIGNAL(selectionChanged()),
	    this, SLOT(updateMenuStates()));
    connect(m_viewManager, SIGNAL(inProgressSelectionChanged()),
	    this, SLOT(inProgressSelectionChanged()));

    // set a sensible default font size for views -- cannot do this
    // in Preferences, which is in base and not supposed to use QtGui
    int viewFontSize = QApplication::font().pointSize() * 0.9;
    QSettings settings;
    settings.beginGroup("Preferences");
    viewFontSize = settings.value("view-font-size", viewFontSize).toInt();
    settings.setValue("view-font-size", viewFontSize);
    settings.endGroup();

    Preferences::BackgroundMode mode =
        Preferences::getInstance()->getBackgroundMode();
    m_initialDarkBackground = m_viewManager->getGlobalDarkBackground();
    if (mode != Preferences::BackgroundFromTheme) {
        m_viewManager->setGlobalDarkBackground
            (mode == Preferences::DarkBackground);
    }

    m_paneStack = new PaneStack(0, 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(contextHelpChanged(const QString &)),
            this, SLOT(contextHelpChanged(const QString &)));
    connect(m_paneStack, SIGNAL(paneAdded(Pane *)),
            this, SLOT(paneAdded(Pane *)));
    connect(m_paneStack, SIGNAL(paneHidden(Pane *)),
            this, SLOT(paneHidden(Pane *)));
    connect(m_paneStack, SIGNAL(paneAboutToBeDeleted(Pane *)),
            this, SLOT(paneAboutToBeDeleted(Pane *)));
    connect(m_paneStack, SIGNAL(dropAccepted(Pane *, QStringList)),
            this, SLOT(paneDropAccepted(Pane *, QStringList)));
    connect(m_paneStack, SIGNAL(dropAccepted(Pane *, QString)),
            this, SLOT(paneDropAccepted(Pane *, QString)));
    connect(m_paneStack, SIGNAL(paneDeleteButtonClicked(Pane *)),
            this, SLOT(paneDeleteButtonClicked(Pane *)));

    m_playSource = new AudioCallbackPlaySource(m_viewManager,
                                               QApplication::applicationName());

    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()));
    connect(m_playSource, SIGNAL(audioTimeStretchMultiChannelDisabled()),
            this,           SLOT(audioTimeStretchMultiChannelDisabled()));

    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)));

    Labeller::ValueType labellerType = Labeller::ValueFromTwoLevelCounter;
    settings.beginGroup("MainWindow");

    labellerType = (Labeller::ValueType)
        settings.value("labellertype", (int)labellerType).toInt();
    int cycle = settings.value("labellercycle", 4).toInt();

    settings.endGroup();

    m_labeller = new Labeller(labellerType);
    m_labeller->setCounterCycleSize(cycle);

    if (withMIDIInput) {
        m_midiInput = new MIDIInput(QApplication::applicationName(), this);
    }
}

MainWindowBase::~MainWindowBase()
{
    SVDEBUG << "MainWindowBase::~MainWindowBase" << endl;
    if (m_playTarget) m_playTarget->shutdown();
//    delete m_playTarget;
    delete m_playSource;
    delete m_viewManager;
    delete m_oscQueue;
    delete m_oscQueueStarter;
    delete m_midiInput;
    Profiles::getInstance()->dump();
}

void
MainWindowBase::resizeConstrained(QSize size)
{
    QDesktopWidget *desktop = QApplication::desktop();
    QRect available = desktop->availableGeometry();
    QSize actual(std::min(size.width(), available.width()),
                 std::min(size.height(), available.height()));
    resize(actual);
}

void
MainWindowBase::startOSCQueue()
{
    m_oscQueueStarter = new OSCQueueStarter(this);
    connect(m_oscQueueStarter, SIGNAL(finished()), this, SLOT(oscReady()));
    m_oscQueueStarter->start();
}

void
MainWindowBase::oscReady()
{
    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);
        cerr << "Finished setting up OSC interface" << endl;
    }
}

QString
MainWindowBase::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::LayerFileNoMidi:
        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::CSVFile:
        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
MainWindowBase::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::LayerFileNoMidi:
        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::CSVFile:
        return ff->getSaveFileName(type, m_sessionFile);
    case FileFinder::AnyFile:
        return ff->getSaveFileName(type, m_sessionFile);
    }
    return "";
}

void
MainWindowBase::registerLastOpenedFilePath(FileFinder::FileType type, QString path)
{
    FileFinder *ff = FileFinder::getInstance();
    ff->registerLastOpenedFilePath(type, path);
}

QString
MainWindowBase::getDefaultSessionTemplate() const
{
    QSettings settings;
    settings.beginGroup("MainWindow");
    QString templateName = settings.value("sessiontemplate", "").toString();
    if (templateName == "") templateName = "default";
    return templateName;
}

void
MainWindowBase::setDefaultSessionTemplate(QString n) 
{
    QSettings settings;
    settings.beginGroup("MainWindow");
    settings.setValue("sessiontemplate", n);
}    

void
MainWindowBase::updateMenuStates()
{
    Pane *currentPane = 0;
    Layer *currentLayer = 0;

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

    bool havePrevPane = false, haveNextPane = false;
    bool havePrevLayer = false, haveNextLayer = false;

    if (currentPane) {
        for (int i = 0; i < m_paneStack->getPaneCount(); ++i) {
            if (m_paneStack->getPane(i) == currentPane) {
                if (i > 0) havePrevPane = true;
                if (i < m_paneStack->getPaneCount()-1) haveNextPane = true;
                break;
            }
        }
        if (currentLayer) {
            for (int i = 0; i < currentPane->getLayerCount(); ++i) {
                if (currentPane->getLayer(i) == currentLayer) {
                    if (i > 0) havePrevLayer = true;
                    if (i < currentPane->getLayerCount()-1) haveNextLayer = true;
                    break;
                }
            }
        }
    }        

    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 haveCurrentDurationLayer = 
	(haveCurrentLayer &&
	 (dynamic_cast<NoteLayer *>(currentLayer) ||
          dynamic_cast<RegionLayer *>(currentLayer)));
    bool haveCurrentColour3DPlot =
        (haveCurrentLayer &&
         dynamic_cast<Colour3DPlotLayer *>(currentLayer));
    bool haveClipboardContents =
        (m_viewManager &&
         !m_viewManager->getClipboard().empty());
    bool haveTabularLayer =
        (haveCurrentLayer &&
         dynamic_cast<TabularModel *>(currentLayer->getModel()));

    emit canAddPane(haveMainModel);
    emit canDeleteCurrentPane(haveCurrentPane);
    emit canZoom(haveMainModel && haveCurrentPane);
    emit canScroll(haveMainModel && haveCurrentPane);
    emit canAddLayer(haveMainModel && haveCurrentPane);
    emit canImportMoreAudio(haveMainModel);
    emit canReplaceMainAudio(haveMainModel);
    emit canImportLayer(haveMainModel && haveCurrentPane);
    emit canExportAudio(haveMainModel);
    emit canChangeSessionTemplate(haveMainModel);
    emit canExportLayer(haveMainModel &&
                        (haveCurrentEditableLayer || haveCurrentColour3DPlot));
    emit canExportImage(haveMainModel && haveCurrentPane);
    emit canDeleteCurrentLayer(haveCurrentLayer);
    emit canRenameLayer(haveCurrentLayer);
    emit canEditLayer(haveCurrentEditableLayer);
    emit canEditLayerTabular(haveCurrentEditableLayer || haveTabularLayer);
    emit canMeasureLayer(haveCurrentLayer);
    emit canSelect(haveMainModel && haveCurrentPane);
    emit canPlay(haveMainModel && havePlayTarget);
    emit canFfwd(true);
    emit canRewind(true);
    emit canPaste(haveClipboardContents);
    emit canInsertInstant(haveCurrentPane);
    emit canInsertInstantsAtBoundaries(haveCurrentPane && haveSelection);
    emit canInsertItemAtSelection(haveCurrentPane && haveSelection && haveCurrentDurationLayer);
    emit canRenumberInstants(haveCurrentTimeInstantsLayer && haveSelection);
    emit canPlaySelection(haveMainModel && havePlayTarget && haveSelection);
    emit canClearSelection(haveSelection);
    emit canEditSelection(haveSelection && haveCurrentEditableLayer);
    emit canSave(m_sessionFile != "" && m_documentModified);
    emit canSelectPreviousPane(havePrevPane);
    emit canSelectNextPane(haveNextPane);
    emit canSelectPreviousLayer(havePrevLayer);
    emit canSelectNextLayer(haveNextLayer);
}

void
MainWindowBase::documentModified()
{
//    SVDEBUG << "MainWindowBase::documentModified" << endl;

    if (!m_documentModified) {
        //!!! this in subclass implementation?
	setWindowTitle(tr("%1 (modified)").arg(windowTitle()));
    }

    m_documentModified = true;
    updateMenuStates();
}

void
MainWindowBase::documentRestored()
{
//    SVDEBUG << "MainWindowBase::documentRestored" << endl;

    if (m_documentModified) {
        //!!! this in subclass implementation?
	QString wt(windowTitle());
	wt.replace(tr(" (modified)"), "");
	setWindowTitle(wt);
    }

    m_documentModified = false;
    updateMenuStates();
}

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

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

void
MainWindowBase::playSoloToggled()
{
    QAction *action = dynamic_cast<QAction *>(sender());
    
    if (action) {
	m_viewManager->setPlaySoloMode(action->isChecked());
    } else {
	m_viewManager->setPlaySoloMode(!m_viewManager->getPlaySoloMode());
    }

    if (m_viewManager->getPlaySoloMode()) {
        currentPaneChanged(m_paneStack->getCurrentPane());
    } else {
        m_viewManager->setPlaybackModel(0);
        if (m_playSource) {
            m_playSource->clearSoloModelSet();
        }
    }
}

void
MainWindowBase::currentPaneChanged(Pane *p)
{
    updateMenuStates();
    updateVisibleRangeDisplay(p);

    if (!p) return;

    if (!(m_viewManager &&
          m_playSource &&
          m_viewManager->getPlaySoloMode())) {
        if (m_viewManager) m_viewManager->setPlaybackModel(0);
        return;
    }

    Model *prevPlaybackModel = m_viewManager->getPlaybackModel();

    // What we want here is not the currently playing frame (unless we
    // are about to clear out the audio playback buffers -- which may
    // or may not be possible, depending on the audio driver).  What
    // we want is the frame that was last committed to the soundcard
    // buffers, as the audio driver will continue playing up to that
    // frame before switching to whichever one we decide we want to
    // switch to, regardless of our efforts.

    int frame = m_playSource->getCurrentBufferedFrame();

//    cerr << "currentPaneChanged: current frame (in ref model) = " << frame << endl;

    View::ModelSet soloModels = p->getModels();
    
    View::ModelSet sources;
    for (View::ModelSet::iterator mi = soloModels.begin();
         mi != soloModels.end(); ++mi) {
        // If a model in this pane is derived from something else,
        // then we want to play that model as well -- if the model
        // that's derived from it is not something that is itself
        // individually playable (e.g. a waveform)
        if (*mi &&
            !dynamic_cast<RangeSummarisableTimeValueModel *>(*mi) &&
            (*mi)->getSourceModel()) {
            sources.insert((*mi)->getSourceModel());
        }
    }
    for (View::ModelSet::iterator mi = sources.begin();
         mi != sources.end(); ++mi) {
        soloModels.insert(*mi);
    }

    //!!! Need an "atomic" way of telling the play source that the
    //playback model has changed, and changing it on ViewManager --
    //the play source should be making the setPlaybackModel call to
    //ViewManager

    for (View::ModelSet::iterator mi = soloModels.begin();
         mi != soloModels.end(); ++mi) {
        if (dynamic_cast<RangeSummarisableTimeValueModel *>(*mi)) {
            m_viewManager->setPlaybackModel(*mi);
        }
    }
    
    RangeSummarisableTimeValueModel *a = 
        dynamic_cast<RangeSummarisableTimeValueModel *>(prevPlaybackModel);
    RangeSummarisableTimeValueModel *b = 
        dynamic_cast<RangeSummarisableTimeValueModel *>(m_viewManager->
                                                        getPlaybackModel());

    m_playSource->setSoloModelSet(soloModels);

    if (a && b && (a != b)) {
        if (m_playSource->isPlaying()) m_playSource->play(frame);
    }
}

void
MainWindowBase::currentLayerChanged(Pane *p, Layer *)
{
    updateMenuStates();
    updateVisibleRangeDisplay(p);
}

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

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

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

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

void
MainWindowBase::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(currentPane, *i, clipboard);
        layer->deleteSelection(*i);
    }

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

void
MainWindowBase::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(currentPane, *i, clipboard);
    }
}

void
MainWindowBase::paste()
{
    pasteRelative(0);
}

void
MainWindowBase::pasteAtPlaybackPosition()
{
    unsigned long pos = getFrame();
    Clipboard &clipboard = m_viewManager->getClipboard();
    if (!clipboard.empty()) {
        long firstEventFrame = clipboard.getPoints()[0].getFrame();
        long offset = 0;
        if (firstEventFrame < 0) {
            offset = (long)pos - firstEventFrame;
        } else if (firstEventFrame < pos) {
            offset = pos - (unsigned long)firstEventFrame;
        } else {
            offset = -((unsigned long)firstEventFrame - pos);
        }
        pasteRelative(offset);
    }
}

void
MainWindowBase::pasteRelative(int offset)
{
    Pane *currentPane = m_paneStack->getCurrentPane();
    if (!currentPane) return;

    Layer *layer = currentPane->getSelectedLayer();

    Clipboard &clipboard = m_viewManager->getClipboard();

    bool inCompound = false;

    if (!layer || !layer->isLayerEditable()) {
        
        CommandHistory::getInstance()->startCompoundOperation
            (tr("Paste"), true);

        // no suitable current layer: create one of the most
        // appropriate sort
        LayerFactory::LayerType type =
            LayerFactory::getInstance()->getLayerTypeForClipboardContents(clipboard);
        layer = m_document->createEmptyLayer(type);

        if (!layer) {
            CommandHistory::getInstance()->endCompoundOperation();
            return;
        }

        m_document->addLayerToView(currentPane, layer);
        m_paneStack->setCurrentLayer(currentPane, layer);

        inCompound = true;
    }

    layer->paste(currentPane, clipboard, offset, true);

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

void
MainWindowBase::deleteSelected()
{
    if (m_paneStack->getCurrentPane() &&
	m_paneStack->getCurrentPane()->getSelectedLayer()) {
        
        Layer *layer = m_paneStack->getCurrentPane()->getSelectedLayer();

        if (m_viewManager && 
            (m_viewManager->getToolMode() == ViewManager::MeasureMode)) {

            layer->deleteCurrentMeasureRect();

        } else {

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

// FrameTimer method

unsigned long
MainWindowBase::getFrame() const
{
    if (m_playSource && m_playSource->isPlaying()) {
        return m_playSource->getCurrentPlayingFrame();
    } else {
        return m_viewManager->getPlaybackFrame();
    }
}    

void
MainWindowBase::insertInstant()
{
    insertInstantAt(getFrame());
}

void
MainWindowBase::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(start);
            insertInstantAt(end);
        }
    }
}

void
MainWindowBase::insertInstantAt(size_t frame)
{
    Pane *pane = m_paneStack->getCurrentPane();
    if (!pane) {
        return;
    }

    frame = pane->alignFromReference(frame);

    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, "");

            SparseOneDimensionalModel::Point prevPoint(0);
            bool havePrevPoint = false;

            SparseOneDimensionalModel::EditCommand *command =
                new SparseOneDimensionalModel::EditCommand(sodm, tr("Add Point"));

            if (m_labeller->requiresPrevPoint()) {

                SparseOneDimensionalModel::PointList prevPoints =
                    sodm->getPreviousPoints(frame);

                if (!prevPoints.empty()) {
                    prevPoint = *prevPoints.begin();
                    havePrevPoint = true;
                }
            }

            if (m_labeller) {

                m_labeller->setSampleRate(sodm->getSampleRate());

                if (m_labeller->actingOnPrevPoint()) {
                    command->deletePoint(prevPoint);
                }

                m_labeller->label<SparseOneDimensionalModel::Point>
                    (point, havePrevPoint ? &prevPoint : 0);

                if (m_labeller->actingOnPrevPoint()) {
                    command->addPoint(prevPoint);
                }
            }
            
            command->addPoint(point);

            command->setName(tr("Add Point at %1 s")
                             .arg(RealTime::frame2RealTime
                                  (frame,
                                   sodm->getSampleRate())
                                  .toText(false).c_str()));

            Command *c = command->finish();
            if (c) CommandHistory::getInstance()->addCommand(c, false);
        }
    }
}

void
MainWindowBase::insertItemAtSelection()
{
    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) {
            insertItemAt(start, end - start);
        }
    }
}

void
MainWindowBase::insertItemAt(size_t frame, size_t duration)
{
    Pane *pane = m_paneStack->getCurrentPane();
    if (!pane) {
        return;
    }

    // ugh!

    size_t alignedStart = pane->alignFromReference(frame);
    size_t alignedEnd = pane->alignFromReference(frame + duration);
    if (alignedStart >= alignedEnd) return;
    size_t alignedDuration = alignedEnd - alignedStart;

    Command *c = 0;

    QString name = tr("Add Item at %1 s")
        .arg(RealTime::frame2RealTime
             (alignedStart,
              getMainModel()->getSampleRate())
             .toText(false).c_str());

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

    RegionModel *rm = dynamic_cast<RegionModel *>(layer->getModel());
    if (rm) {
        RegionModel::Point point(alignedStart,
                                 rm->getValueMaximum() + 1,
                                 alignedDuration,
                                 "");
        RegionModel::EditCommand *command =
            new RegionModel::EditCommand(rm, tr("Add Point"));
        command->addPoint(point);
        command->setName(name);
        c = command->finish();
    }

    if (c) {
        CommandHistory::getInstance()->addCommand(c, false);
        return;
    }

    NoteModel *nm = dynamic_cast<NoteModel *>(layer->getModel());
    if (nm) {
        NoteModel::Point point(alignedStart,
                               rm->getValueMinimum(),
                               alignedDuration,
                               1.f,
                               "");
        NoteModel::EditCommand *command =
            new NoteModel::EditCommand(nm, tr("Add Point"));
        command->addPoint(point);
        command->setName(name);
        c = command->finish();
    }

    if (c) {
        CommandHistory::getInstance()->addCommand(c, false);
        return;
    }
}

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

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

    MultiSelection ms(m_viewManager->getSelection());
    
    Model *model = layer->getModel();
    SparseOneDimensionalModel *sodm = dynamic_cast<SparseOneDimensionalModel *>
        (model);
    if (!sodm) return;

    if (!m_labeller) return;

    Labeller labeller(*m_labeller);
    labeller.setSampleRate(sodm->getSampleRate());

    // This uses a command

    labeller.labelAll<SparseOneDimensionalModel::Point>(*sodm, &ms);
}

MainWindowBase::FileOpenStatus
MainWindowBase::open(QString fileOrUrl, AudioFileOpenMode mode)
{
    ProgressDialog dialog(tr("Opening file or URL..."), true, 2000, this);
    connect(&dialog, SIGNAL(showing()), this, SIGNAL(hideSplash()));
    return open(FileSource(fileOrUrl, &dialog), mode);
}

MainWindowBase::FileOpenStatus
MainWindowBase::open(FileSource source, AudioFileOpenMode mode)
{
    FileOpenStatus status;

    if (!source.isAvailable()) return FileOpenFailed;
    source.waitForData();

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

    bool rdf = (source.getExtension().toLower() == "rdf" ||
                source.getExtension().toLower() == "n3" ||
                source.getExtension().toLower() == "ttl");

    bool audio = AudioFileReaderFactory::getKnownExtensions().contains
        (source.getExtension().toLower());

    bool rdfSession = false;
    if (rdf) {
        RDFImporter::RDFDocumentType rdfType = 
            RDFImporter::identifyDocumentType
            (QUrl::fromLocalFile(source.getLocalFilename()).toString());
//        cerr << "RDF type: " << (int)rdfType << endl;
        if (rdfType == RDFImporter::AudioRefAndAnnotations ||
            rdfType == RDFImporter::AudioRef) {
            rdfSession = true;
        } else if (rdfType == RDFImporter::NotRDF) {
            rdf = false;
        }
    }

    if (rdf) {
        if (rdfSession) {
            bool cancel = false;
            if (!canImportLayer || shouldCreateNewSessionForRDFAudio(&cancel)) {
                return openSession(source);
            } else if (cancel) {
                return FileOpenCancelled;
            } else {
                return openLayer(source);
            }
        } else {
            if ((status = openSession(source)) != FileOpenFailed) {
                return status;
            } else if (!canImportLayer) {
                return FileOpenWrongMode;
            } else if ((status = openLayer(source)) != FileOpenFailed) {
                return status;
            } else {
                return FileOpenFailed;
            }
        }
    }

    if (audio && (status = openAudio(source, mode)) != FileOpenFailed) {
        return status;
    } else if ((status = openSession(source)) != FileOpenFailed) {
	return status;
    } else if ((status = openPlaylist(source, mode)) != FileOpenFailed) {
        return status;
    } else if (!canImportLayer) {
        return FileOpenWrongMode;
    } else if ((status = openImage(source)) != FileOpenFailed) {
        return status;
    } else if ((status = openLayer(source)) != FileOpenFailed) {
        return status;
    } else {
	return FileOpenFailed;
    }
}

MainWindowBase::FileOpenStatus
MainWindowBase::openAudio(FileSource source, AudioFileOpenMode mode,
                          QString templateName)
{
//    SVDEBUG << "MainWindowBase::openAudio(" << source.getLocation() << ")" << endl;

    if (templateName == "") {
        templateName = getDefaultSessionTemplate();
    }

    cerr << "template is: \"" << templateName << "\"" << endl;

    if (!source.isAvailable()) return FileOpenFailed;
    source.waitForData();

    m_openingAudioFile = true;

    size_t rate = 0;

    if (Preferences::getInstance()->getResampleOnLoad()) {
        rate = m_playSource->getSourceSampleRate();
    }

    WaveFileModel *newModel = new WaveFileModel(source, rate);

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

//    cerr << "mode = " << mode << endl;

    if (mode == AskUser) {
        if (getMainModel()) {

            QSettings settings;
            settings.beginGroup("MainWindow");
            int lastMode = settings.value("lastaudioopenmode", 0).toBool();
            settings.endGroup();
            int imode = 0;
            
            QStringList items;
            items << tr("Close the current session and start a new one")
                  << tr("Replace the main audio file in this session")
                  << tr("Add the audio file to this session");

            bool ok = false;
            QString item = ListInputDialog::getItem
                (this, tr("Select target for import"),
                 tr("<b>Select a target for import</b><p>You already have an audio file loaded.<br>What would you like to do with the new audio file?"),
                 items, lastMode, &ok);
            
            if (!ok || item.isEmpty()) {
                delete newModel;
                m_openingAudioFile = false;
                return FileOpenCancelled;
            }
            
            for (int i = 0; i < items.size(); ++i) {
                if (item == items[i]) imode = i;
            }

            settings.beginGroup("MainWindow");
            settings.setValue("lastaudioopenmode", imode);
            settings.endGroup();

            mode = (AudioFileOpenMode)imode;

        } else {
            // no main model: make a new session
            mode = ReplaceSession;
        }
    }

    if (mode == ReplaceCurrentPane) {

        Pane *pane = m_paneStack->getCurrentPane();
        if (pane) {
            if (getMainModel()) {
                View::ModelSet models(pane->getModels());
                if (models.find(getMainModel()) != models.end()) {
                    // Current pane contains main model: replace that
                    mode = ReplaceMainModel;
                }
                // Otherwise the current pane has a non-default model,
                // which we will deal with later
            } else {
                // We have no main model, so start a new session with
                // optional template
                mode = ReplaceSession;
            }
        } else {
            // We seem to have no current pane!  Oh well
            mode = CreateAdditionalModel;
        }
    }

    if (mode == CreateAdditionalModel && !getMainModel()) {
        mode = ReplaceSession;
    }

    bool loadedTemplate = false;

    if (mode == ReplaceSession) {

        if (!checkSaveModified()) return FileOpenCancelled;

        cerr << "SV looking for template " << templateName << endl;
        if (templateName != "") {
            FileOpenStatus tplStatus = openSessionTemplate(templateName);
            if (tplStatus == FileOpenCancelled) {
                cerr << "Template load cancelled" << endl;
                return FileOpenCancelled;
            }
            if (tplStatus != FileOpenFailed) {
                cerr << "Template load succeeded" << endl;
                loadedTemplate = true;
            }
        }

        if (!loadedTemplate) {
            closeSession();
            createDocument();
        }

        mode = ReplaceMainModel;
    }

    emit activity(tr("Import audio file \"%1\"").arg(source.getLocation()));

    if (mode == ReplaceMainModel) {

        Model *prevMain = getMainModel();
        if (prevMain) {
            m_playSource->removeModel(prevMain);
            PlayParameterRepository::getInstance()->removePlayable(prevMain);
        }
        PlayParameterRepository::getInstance()->addPlayable(newModel);

        SVDEBUG << "SV about to call setMainModel(" << newModel << "): prevMain is " << prevMain << endl;

	m_document->setMainModel(newModel);

	setupMenus();

	if (loadedTemplate || (m_sessionFile == "")) {
            //!!! shouldn't be dealing directly with title from here -- call a method
	    setWindowTitle(tr("%1: %2")
                           .arg(QApplication::applicationName())
                           .arg(source.getLocation()));
	    CommandHistory::getInstance()->clear();
	    CommandHistory::getInstance()->documentSaved();
	    m_documentModified = false;
	} else {
	    setWindowTitle(tr("%1: %2 [%3]")
                           .arg(QApplication::applicationName())
			   .arg(QFileInfo(m_sessionFile).fileName())
			   .arg(source.getLocation()));
	    if (m_documentModified) {
		m_documentModified = false;
		documentModified(); // so as to restore "(modified)" window title
	    }
	}

        if (!source.isRemote()) m_audioFile = source.getLocalFilename();

    } else if (mode == CreateAdditionalModel) {

	CommandHistory::getInstance()->startCompoundOperation
	    (tr("Import \"%1\"").arg(source.getBasename()), true);

	m_document->addImportedModel(newModel);

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

	Pane *pane = command->getPane();

        if (m_timeRulerLayer) {
            m_document->addLayerToView(pane, m_timeRulerLayer);
        }

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

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

    } else if (mode == ReplaceCurrentPane) {

        // We know there is a current pane, otherwise we would have
        // reset the mode to CreateAdditionalModel above; and we know
        // the current pane does not contain the main model, otherwise
        // we would have reset it to ReplaceMainModel.  But we don't
        // know whether the pane contains a waveform model at all.
        
        Pane *pane = m_paneStack->getCurrentPane();
        Layer *replace = 0;

        for (int i = 0; i < pane->getLayerCount(); ++i) {
            Layer *layer = pane->getLayer(i);
            if (dynamic_cast<WaveformLayer *>(layer)) {
                replace = layer;
                break;
            }
        }

	CommandHistory::getInstance()->startCompoundOperation
	    (tr("Import \"%1\"").arg(source.getBasename()), true);

	m_document->addImportedModel(newModel);

        if (replace) {
            m_document->removeLayerFromView(pane, replace);
        }

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

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

    updateMenuStates();
    m_recentFiles.addFile(source.getLocation());
    if (!source.isRemote()) {
        // for file dialog
        registerLastOpenedFilePath(FileFinder::AudioFile,
                                   source.getLocalFilename());
    }
    m_openingAudioFile = false;

    currentPaneChanged(m_paneStack->getCurrentPane());

    return FileOpenSucceeded;
}

MainWindowBase::FileOpenStatus
MainWindowBase::openPlaylist(FileSource source, AudioFileOpenMode mode)
{
    SVDEBUG << "MainWindowBase::openPlaylist(" << source.getLocation() << ")" << endl;

    std::set<QString> extensions;
    PlaylistFileReader::getSupportedExtensions(extensions);
    QString extension = source.getExtension().toLower();
    if (extensions.find(extension) == extensions.end()) return FileOpenFailed;

    if (!source.isAvailable()) return FileOpenFailed;
    source.waitForData();

    PlaylistFileReader reader(source.getLocalFilename());
    if (!reader.isOK()) return FileOpenFailed;

    PlaylistFileReader::Playlist playlist = reader.load();

    bool someSuccess = false;

    for (PlaylistFileReader::Playlist::const_iterator i = playlist.begin();
         i != playlist.end(); ++i) {

        ProgressDialog dialog(tr("Opening playlist..."), true, 2000, this);
        connect(&dialog, SIGNAL(showing()), this, SIGNAL(hideSplash()));
        FileOpenStatus status = openAudio(FileSource(*i, &dialog), mode);

        if (status == FileOpenCancelled) {
            return FileOpenCancelled;
        }

        if (status == FileOpenSucceeded) {
            someSuccess = true;
            mode = CreateAdditionalModel;
        }
    }

    if (someSuccess) return FileOpenSucceeded;
    else return FileOpenFailed;
}

MainWindowBase::FileOpenStatus
MainWindowBase::openLayer(FileSource source)
{
    SVDEBUG << "MainWindowBase::openLayer(" << source.getLocation() << ")" << endl;

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

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

    if (!source.isAvailable()) return FileOpenFailed;
    source.waitForData();

    QString path = source.getLocalFilename();

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

//    cerr << "RDF type:  (in layer) " << (int) rdfType << endl;

    if (rdfType != RDFImporter::NotRDF) {

        return openLayersFromRDF(source);

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

        PaneCallback callback(this);
        QFile file(path);
        
        if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
            cerr << "ERROR: MainWindowBase::openLayer("
                      << source.getLocation()
                      << "): Failed to open file for reading" << endl;
            return FileOpenFailed;
        }
        
        SVFileReader reader(m_document, callback, source.getLocation());
        connect
            (&reader, SIGNAL(modelRegenerationFailed(QString, QString, QString)),
             this, SLOT(modelRegenerationFailed(QString, QString, QString)));
        connect
            (&reader, SIGNAL(modelRegenerationWarning(QString, QString, QString)),
             this, SLOT(modelRegenerationWarning(QString, QString, QString)));
        reader.setCurrentPane(pane);
        
        QXmlInputSource inputSource(&file);
        reader.parse(inputSource);
        
        if (!reader.isOK()) {
            cerr << "ERROR: MainWindowBase::openLayer("
                      << source.getLocation()
                      << "): Failed to read XML file: "
                      << reader.getErrorString() << endl;
            return FileOpenFailed;
        }

        emit activity(tr("Import layer XML file \"%1\"").arg(source.getLocation()));

        m_recentFiles.addFile(source.getLocation());

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

        return FileOpenSucceeded;

    } else {
        
        try {

            MIDIFileImportDialog midiDlg(this);

            Model *model = DataFileReaderFactory::loadNonCSV
                (path, &midiDlg, getMainModel()->getSampleRate());
        
            if (!model) {
                CSVFormat format(path);
                format.setSampleRate(getMainModel()->getSampleRate());
                CSVFormatDialog *dialog = new CSVFormatDialog(this, format);
                if (dialog->exec() == QDialog::Accepted) {
                    model = DataFileReaderFactory::loadCSV
                        (path, dialog->getFormat(),
                         getMainModel()->getSampleRate());
                }
            }

            if (model) {

                SVDEBUG << "MainWindowBase::openLayer: Have model" << endl;

                emit activity(tr("Import MIDI file \"%1\"").arg(source.getLocation()));

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

                if (newLayer) {

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

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

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

MainWindowBase::FileOpenStatus
MainWindowBase::openImage(FileSource source)
{
    SVDEBUG << "MainWindowBase::openImage(" << source.getLocation() << ")" << endl;

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

    if (!m_document->getMainModel()) {
        return FileOpenWrongMode;
    }

    bool newLayer = false;

    ImageLayer *il = dynamic_cast<ImageLayer *>(pane->getSelectedLayer());
    if (!il) {
        for (int i = pane->getLayerCount()-1; i >= 0; --i) {
            il = dynamic_cast<ImageLayer *>(pane->getLayer(i));
            if (il) break;
        }
    }
    if (!il) {
        il = dynamic_cast<ImageLayer *>
            (m_document->createEmptyLayer(LayerFactory::Image));
        if (!il) return FileOpenFailed;
        newLayer = true;
    }

    // We don't put the image file in Recent Files

    cerr << "openImage: trying location \"" << source.getLocation() << "\" in image layer" << endl;

    if (!il->addImage(m_viewManager->getGlobalCentreFrame(), source.getLocation())) {
        if (newLayer) {
            m_document->deleteLayer(il); // also releases its model
        }
        return FileOpenFailed;
    } else {
        if (newLayer) {
            m_document->addLayerToView(pane, il);
        }
        m_paneStack->setCurrentLayer(pane, il);
    }

    return FileOpenSucceeded;
}

MainWindowBase::FileOpenStatus
MainWindowBase::openSessionFile(QString fileOrUrl)
{
    ProgressDialog dialog(tr("Opening session..."), true, 2000, this);
    connect(&dialog, SIGNAL(showing()), this, SIGNAL(hideSplash()));
    return openSession(FileSource(fileOrUrl, &dialog));
}

MainWindowBase::FileOpenStatus
MainWindowBase::openSession(FileSource source)
{
    SVDEBUG << "MainWindowBase::openSession(" << source.getLocation() << ")" << endl;

    if (!source.isAvailable()) return FileOpenFailed;
    source.waitForData();

    if (source.getExtension().toLower() != "sv") {

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

//        cerr << "RDF type: " << (int)rdfType << endl;

        if (rdfType == RDFImporter::AudioRefAndAnnotations ||
            rdfType == RDFImporter::AudioRef) {
            return openSessionFromRDF(source);
        } else if (rdfType != RDFImporter::NotRDF) {
            return FileOpenFailed;
        }

        if (source.getExtension().toLower() == "xml") {
            if (SVFileReader::identifyXmlFile(source.getLocalFilename()) ==
                SVFileReader::SVSessionFile) {
                cerr << "This XML file looks like a session file, attempting to open it as a session" << endl;
            } else {
                return FileOpenFailed;
            }
        } else {
            return FileOpenFailed;
        }
    }

    QXmlInputSource *inputSource = 0;
    BZipFileDevice *bzFile = 0;
    QFile *rawFile = 0;

    if (source.getExtension().toLower() == "sv") {
        bzFile = new BZipFileDevice(source.getLocalFilename());
        if (!bzFile->open(QIODevice::ReadOnly)) {
            delete bzFile;
            return FileOpenFailed;
        }
        inputSource = new QXmlInputSource(bzFile);
    } else {
        rawFile = new QFile(source.getLocalFilename());
        inputSource = new QXmlInputSource(rawFile);
    }

    if (!checkSaveModified()) {
        if (bzFile) bzFile->close();
        delete inputSource;
        delete bzFile;
        delete rawFile;
        return FileOpenCancelled;
    }

    QString error;
    closeSession();
    createDocument();

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

    SVFileReader reader(m_document, callback, source.getLocation());
    connect
        (&reader, SIGNAL(modelRegenerationFailed(QString, QString, QString)),
         this, SLOT(modelRegenerationFailed(QString, QString, QString)));
    connect
        (&reader, SIGNAL(modelRegenerationWarning(QString, QString, QString)),
         this, SLOT(modelRegenerationWarning(QString, QString, QString)));

    reader.parse(*inputSource);
    
    if (!reader.isOK()) {
        error = tr("SV XML file read error:\n%1").arg(reader.getErrorString());
    }
    
    if (bzFile) bzFile->close();

    delete inputSource;
    delete bzFile;
    delete rawFile;

    bool ok = (error == "");

    if (ok) {

        emit activity(tr("Import session file \"%1\"").arg(source.getLocation()));

	setWindowTitle(tr("%1: %2")
                       .arg(QApplication::applicationName())
		       .arg(source.getLocation()));

	if (!source.isRemote()) m_sessionFile = source.getLocalFilename();

	setupMenus();

	CommandHistory::getInstance()->clear();
	CommandHistory::getInstance()->documentSaved();
	m_documentModified = false;
	updateMenuStates();

        m_recentFiles.addFile(source.getLocation());

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

    } else {
	setWindowTitle(QApplication::applicationName());
    }

    return ok ? FileOpenSucceeded : FileOpenFailed;
}

MainWindowBase::FileOpenStatus
MainWindowBase::openSessionTemplate(QString templateName)
{
    // Template in the user's template directory takes
    // priority over a bundled one; we don't unbundle, but
    // open directly from the bundled file (where applicable)
    ResourceFinder rf;
    QString tfile = rf.getResourcePath("templates", templateName + ".svt");
    if (tfile != "") {
        cerr << "SV loading template file " << tfile << endl;
        return openSessionTemplate(FileSource("file:" + tfile));
    } else {
        return FileOpenFailed;
    }
}

MainWindowBase::FileOpenStatus
MainWindowBase::openSessionTemplate(FileSource source)
{
    cerr << "MainWindowBase::openSessionTemplate(" << source.getLocation() << ")" << endl;

    if (!source.isAvailable()) return FileOpenFailed;
    source.waitForData();

    QXmlInputSource *inputSource = 0;
    QFile *file = 0;
    bool isTemplate = false;

    file = new QFile(source.getLocalFilename());
    inputSource = new QXmlInputSource(file);

    if (!checkSaveModified()) {
        delete inputSource;
        delete file;
        return FileOpenCancelled;
    }

    QString error;
    closeSession();
    createDocument();

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

    SVFileReader reader(m_document, callback, source.getLocation());
    connect
        (&reader, SIGNAL(modelRegenerationFailed(QString, QString, QString)),
         this, SLOT(modelRegenerationFailed(QString, QString, QString)));
    connect
        (&reader, SIGNAL(modelRegenerationWarning(QString, QString, QString)),
         this, SLOT(modelRegenerationWarning(QString, QString, QString)));

    reader.parse(*inputSource);
    
    if (!reader.isOK()) {
        error = tr("SV XML file read error:\n%1").arg(reader.getErrorString());
    }
    
    delete inputSource;
    delete file;

    bool ok = (error == "");

    setWindowTitle(QApplication::applicationName());

    if (ok) {

        emit activity(tr("Open session template \"%1\"").arg(source.getLocation()));

	setupMenus();

	CommandHistory::getInstance()->clear();
	CommandHistory::getInstance()->documentSaved();
	m_documentModified = false;
	updateMenuStates();
    }

    return ok ? FileOpenSucceeded : FileOpenFailed;
}

MainWindowBase::FileOpenStatus
MainWindowBase::openSessionFromRDF(FileSource source)
{
    SVDEBUG << "MainWindowBase::openSessionFromRDF(" << source.getLocation() << ")" << endl;

    if (!source.isAvailable()) return FileOpenFailed;
    source.waitForData();

    if (!checkSaveModified()) {
        return FileOpenCancelled;
    }
    
    closeSession();
    createDocument();

    FileOpenStatus status = openLayersFromRDF(source);

    setupMenus();
    
    setWindowTitle(tr("%1: %2")
                   .arg(QApplication::applicationName())
                   .arg(source.getLocation()));
    CommandHistory::getInstance()->clear();
    CommandHistory::getInstance()->documentSaved();
    m_documentModified = false;

    return status;
}

MainWindowBase::FileOpenStatus
MainWindowBase::openLayersFromRDF(FileSource source)
{
    size_t rate = 0;

    SVDEBUG << "MainWindowBase::openLayersFromRDF" << endl;

    ProgressDialog dialog(tr("Importing from RDF..."), true, 2000, this);
    connect(&dialog, SIGNAL(showing()), this, SIGNAL(hideSplash()));

    if (getMainModel()) {
        rate = getMainModel()->getSampleRate();
    } else if (Preferences::getInstance()->getResampleOnLoad()) {
        rate = m_playSource->getSourceSampleRate();
    }

    RDFImporter importer
        (QUrl::fromLocalFile(source.getLocalFilename()).toString(), rate);

    if (!importer.isOK()) {
        if (importer.getErrorString() != "") {
            QMessageBox::critical
                (this, tr("Failed to import RDF"),
                 tr("<b>Failed to import RDF</b><p>Importing data from RDF document at \"%1\" failed: %2</p>")
                 .arg(source.getLocation()).arg(importer.getErrorString()));
        }
        return FileOpenFailed;
    }

    std::vector<Model *> models = importer.getDataModels(&dialog);

    dialog.setMessage(tr("Importing from RDF..."));

    if (models.empty()) {
        QMessageBox::critical
            (this, tr("Failed to import RDF"),
             tr("<b>Failed to import RDF</b><p>No suitable data models found for import from RDF document at \"%1\"</p>").arg(source.getLocation()));
        return FileOpenFailed;
    }

    emit activity(tr("Import RDF document \"%1\"").arg(source.getLocation()));

    std::set<Model *> added;

    for (int i = 0; i < (int)models.size(); ++i) {

        Model *m = models[i];
        WaveFileModel *w = dynamic_cast<WaveFileModel *>(m);

        if (w) {

            Pane *pane = addPaneToStack();
            Layer *layer = 0;

            if (m_timeRulerLayer) {
                m_document->addLayerToView(pane, m_timeRulerLayer);
            }

            if (!getMainModel()) {
                m_document->setMainModel(w);
                layer = m_document->createMainModelLayer(LayerFactory::Waveform);
            } else {
                layer = m_document->createImportedLayer(w);
            }

            m_document->addLayerToView(pane, layer);

            added.insert(w);
            
            for (int j = 0; j < (int)models.size(); ++j) {

                Model *dm = models[j];

                if (dm == m) continue;
                if (dm->getSourceModel() != m) continue;

                layer = m_document->createImportedLayer(dm);

                if (layer->isLayerOpaque() ||
                    dynamic_cast<Colour3DPlotLayer *>(layer)) {

                    // these always go in a new pane, with nothing
                    // else going in the same pane

                    Pane *singleLayerPane = addPaneToStack();
                    if (m_timeRulerLayer) {
                        m_document->addLayerToView(singleLayerPane, m_timeRulerLayer);
                    }
                    m_document->addLayerToView(singleLayerPane, layer);

                } else if (layer->getLayerColourSignificance() ==
                           Layer::ColourHasMeaningfulValue) {

                    // these can go in a pane with something else, but
                    // only if none of the something elses also have
                    // this quality

                    bool needNewPane = false;
                    for (int i = 0; i < pane->getLayerCount(); ++i) {
                        Layer *otherLayer = pane->getLayer(i);
                        if (otherLayer &&
                            (otherLayer->getLayerColourSignificance() ==
                             Layer::ColourHasMeaningfulValue)) {
                            needNewPane = true;
                            break;
                        }
                    }
                    if (needNewPane) {
                        pane = addPaneToStack();
                    }

                    m_document->addLayerToView(pane, layer);

                } else {

                    if (pane->getLayerCount() > 4) {
                        pane = addPaneToStack();
                    }

                    m_document->addLayerToView(pane, layer);
                }

                added.insert(dm);
            }
        }
    }

    for (int i = 0; i < (int)models.size(); ++i) {

        Model *m = models[i];

        if (added.find(m) == added.end()) {
            
            Layer *layer = m_document->createImportedLayer(m);
            if (!layer) return FileOpenFailed;

            Pane *singleLayerPane = addPaneToStack();
            if (m_timeRulerLayer) {
                m_document->addLayerToView(singleLayerPane, m_timeRulerLayer);
            }
            m_document->addLayerToView(singleLayerPane, layer);
        }
    }
            
    m_recentFiles.addFile(source.getLocation());
    return FileOpenSucceeded;
}

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

    QSettings settings;
    settings.beginGroup("Preferences");
    QString targetName = settings.value("audio-target", "").toString();
    settings.endGroup();

    AudioTargetFactory *factory = AudioTargetFactory::getInstance();

    factory->setDefaultCallbackTarget(targetName);
    m_playTarget = factory->createCallbackTarget(m_playSource);

    if (!m_playTarget) {
        emit hideSplash();

        if (factory->isAutoCallbackTarget(targetName)) {
            QMessageBox::warning
	    (this, tr("Couldn't open audio device"),
	     tr("<b>No audio available</b><p>Could not open an audio device for playback.<p>Automatic audio device detection failed. Audio playback will not be available during this session.</p>"),
	     QMessageBox::Ok);
        } else {
            QMessageBox::warning
                (this, tr("Couldn't open audio device"),
                 tr("<b>No audio available</b><p>Failed to open your preferred audio device (\"%1\").<p>Audio playback will not be available during this session.</p>")
                 .arg(factory->getCallbackTargetDescription(targetName)),
                 QMessageBox::Ok);
        }
    }
}

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

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

void
MainWindowBase::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, QString)),
            this, SLOT(modelGenerationFailed(QString, QString)));
    connect(m_document, SIGNAL(modelRegenerationWarning(QString, QString, QString)),
            this, SLOT(modelRegenerationWarning(QString, QString, QString)));
    connect(m_document, SIGNAL(modelGenerationFailed(QString, QString)),
            this, SLOT(modelGenerationFailed(QString, QString)));
    connect(m_document, SIGNAL(modelRegenerationWarning(QString, QString, QString)),
            this, SLOT(modelRegenerationWarning(QString, QString, QString)));
    connect(m_document, SIGNAL(alignmentFailed(QString, QString)),
            this, SLOT(alignmentFailed(QString, QString)));

    emit replacedDocument();
}

bool
MainWindowBase::saveSessionFile(QString path)
{
    try {

        TempWriteFile temp(path);

        BZipFileDevice bzFile(temp.getTemporaryFilename());
        if (!bzFile.open(QIODevice::WriteOnly)) {
            cerr << "Failed to open session file \""
                      << temp.getTemporaryFilename()
                      << "\" for writing: "
                      << bzFile.errorString() << endl;
            return false;
        }

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

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

        QApplication::restoreOverrideCursor();

        if (!bzFile.isOK()) {
            QMessageBox::critical(this, tr("Failed to write file"),
                                  tr("<b>Save failed</b><p>Failed to write to file \"%1\": %2")
                                  .arg(path).arg(bzFile.errorString()));
            bzFile.close();
            return false;
        }

        bzFile.close();
        temp.moveToTarget();
        return true;

    } catch (FileOperationFailed &f) {
        
        QMessageBox::critical(this, tr("Failed to write file"),
                              tr("<b>Save failed</b><p>Failed to write to file \"%1\": %2")
                              .arg(path).arg(f.what()));
        return false;
    }
}

bool
MainWindowBase::saveSessionTemplate(QString path)
{
    try {

        TempWriteFile temp(path);

        QFile file(temp.getTemporaryFilename());
        if (!file.open(QIODevice::WriteOnly)) {
            cerr << "Failed to open session template file \""
                      << temp.getTemporaryFilename()
                      << "\" for writing: "
                      << file.errorString() << endl;
            return false;
        }
        
        QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));

        QTextStream out(&file);
        toXml(out, true);
        out.flush();

        QApplication::restoreOverrideCursor();

        file.close();
        temp.moveToTarget();
        return true;

    } catch (FileOperationFailed &f) {
        
        QMessageBox::critical(this, tr("Failed to write file"),
                              tr("<b>Save failed</b><p>Failed to write to file \"%1\": %2")
                              .arg(path).arg(f.what()));
        return false;
    }
}

void
MainWindowBase::toXml(QTextStream &out, bool asTemplate)
{
    QString indent("  ");

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

    if (asTemplate) {
        m_document->toXmlAsTemplate(out, "", "");
    } else {
        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 *
MainWindowBase::addPaneToStack()
{
    AddPaneCommand *command = new AddPaneCommand(this);
    CommandHistory::getInstance()->addCommand(command);
    Pane *pane = command->getPane();
    return pane;
}

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

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

void
MainWindowBase::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();
    if (m_playSource) end = std::max(end, m_playSource->getPlayEndFrame());
    size_t pixels = currentPane->width();

    size_t sw = currentPane->getVerticalScaleWidth();
    if (pixels > sw * 2) pixels -= sw * 2;
    else pixels = 1;
    if (pixels > 4) pixels -= 4;

    size_t zoomLevel = (end - start) / pixels;
    if (zoomLevel < 1) zoomLevel = 1;

    currentPane->setZoomLevel(zoomLevel);
    currentPane->setCentreFrame((start + end) / 2);
}

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

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

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

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

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

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

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

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

void
MainWindowBase::showMinimalOverlays()
{
    m_viewManager->setOverlayMode(ViewManager::MinimalOverlays);
}

void
MainWindowBase::showAllOverlays()
{
    m_viewManager->setOverlayMode(ViewManager::AllOverlays);
}

void
MainWindowBase::toggleTimeRulers()
{
    bool haveRulers = false;
    bool someHidden = 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 *layer = pane->getLayer(j);
            if (!dynamic_cast<TimeRulerLayer *>(layer)) continue;

            haveRulers = true;
            if (layer->isLayerDormant(pane)) someHidden = true;
        }
    }

    if (haveRulers) {

        bool show = someHidden;

        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 (!dynamic_cast<TimeRulerLayer *>(layer)) continue;

                layer->showLayer(pane, show);
            }
        }
    }
}

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

void
MainWindowBase::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
MainWindowBase::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
MainWindowBase::toggleCentreLine()
{
    if (m_viewManager->shouldShowCentreLine()) {
        m_viewManager->setShowCentreLine(false);
    } else {
        m_viewManager->setShowCentreLine(true);
    }
}

void
MainWindowBase::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);
            }
        }
    } else if (name == "Background Mode" && m_viewManager) {
        Preferences::BackgroundMode mode =
            Preferences::getInstance()->getBackgroundMode();
        if (mode == Preferences::BackgroundFromTheme) {
            m_viewManager->setGlobalDarkBackground(m_initialDarkBackground);
        } else if (mode == Preferences::DarkBackground) {
            m_viewManager->setGlobalDarkBackground(true);
        } else {
            m_viewManager->setGlobalDarkBackground(false);
        }
    }            
}

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

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

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

    Pane *pane = m_paneStack->getCurrentPane();
    Layer *layer = getSnapLayer();
    size_t sr = getMainModel()->getSampleRate();

    if (!layer) {

        frame = RealTime::realTime2Frame
            (RealTime::frame2RealTime(frame, sr) + RealTime(2, 0), sr);
        if (frame > int(getMainModel()->getEndFrame())) {
            frame = getMainModel()->getEndFrame();
        }

    } else {

        size_t resolution = 0;
        if (pane) frame = pane->alignFromReference(frame);
        if (layer->snapToFeatureFrame(m_paneStack->getCurrentPane(),
                                      frame, resolution, Layer::SnapRight)) {
            if (pane) frame = pane->alignToReference(frame);
        } else {
            frame = getMainModel()->getEndFrame();
        }
    }
        
    if (frame < 0) frame = 0;

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

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

void
MainWindowBase::ffwdEnd()
{
    if (!getMainModel()) return;

    if (m_playSource &&
        m_playSource->isPlaying() &&
        !m_viewManager->getPlayLoopMode()) {
        stop();
    }

    size_t frame = getMainModel()->getEndFrame();

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

    m_viewManager->setPlaybackFrame(frame);
}

void
MainWindowBase::ffwdSimilar()
{
    if (!getMainModel()) return;

    Layer *layer = getSnapLayer();
    if (!layer) { ffwd(); return; }

    Pane *pane = m_paneStack->getCurrentPane();
    size_t sr = getMainModel()->getSampleRate();

    int frame = m_viewManager->getPlaybackFrame();

    size_t resolution = 0;
    if (pane) frame = pane->alignFromReference(frame);
    if (layer->snapToSimilarFeature(m_paneStack->getCurrentPane(),
                                    frame, resolution, Layer::SnapRight)) {
        if (pane) frame = pane->alignToReference(frame);
    } else {
        frame = getMainModel()->getEndFrame();
    }
        
    if (frame < 0) frame = 0;

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

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

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

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

    Pane *pane = m_paneStack->getCurrentPane();
    Layer *layer = getSnapLayer();
    size_t sr = getMainModel()->getSampleRate();
    
    // when rewinding during playback, we want to allow a period
    // following a rewind target point at which the rewind will go to
    // the prior point instead of the immediately neighbouring one
    if (m_playSource && m_playSource->isPlaying()) {
        RealTime ct = RealTime::frame2RealTime(frame, sr);
        ct = ct - RealTime::fromSeconds(0.25);
        if (ct < RealTime::zeroTime) ct = RealTime::zeroTime;
        frame = RealTime::realTime2Frame(ct, sr);
    }

    if (!layer) {
        
        frame = RealTime::realTime2Frame
            (RealTime::frame2RealTime(frame, sr) - RealTime(2, 0), sr);
        if (frame < int(getMainModel()->getStartFrame())) {
            frame = getMainModel()->getStartFrame();
        }

    } else {

        size_t resolution = 0;
        if (pane) frame = pane->alignFromReference(frame);
        if (layer->snapToFeatureFrame(m_paneStack->getCurrentPane(),
                                      frame, resolution, Layer::SnapLeft)) {
            if (pane) frame = pane->alignToReference(frame);
        } else {
            frame = getMainModel()->getStartFrame();
        }
    }

    if (frame < 0) frame = 0;

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

    m_viewManager->setPlaybackFrame(frame);
}

void
MainWindowBase::rewindStart()
{
    if (!getMainModel()) return;

    size_t frame = getMainModel()->getStartFrame();

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

    m_viewManager->setPlaybackFrame(frame);
}

void
MainWindowBase::rewindSimilar()
{
    if (!getMainModel()) return;

    Layer *layer = getSnapLayer();
    if (!layer) { rewind(); return; }

    Pane *pane = m_paneStack->getCurrentPane();
    size_t sr = getMainModel()->getSampleRate();

    int frame = m_viewManager->getPlaybackFrame();

    size_t resolution = 0;
    if (pane) frame = pane->alignFromReference(frame);
    if (layer->snapToSimilarFeature(m_paneStack->getCurrentPane(),
                                    frame, resolution, Layer::SnapLeft)) {
        if (pane) frame = pane->alignToReference(frame);
    } else {
        frame = getMainModel()->getStartFrame();
    }
        
    if (frame < 0) frame = 0;

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

Layer *
MainWindowBase::getSnapLayer() const
{
    Pane *pane = m_paneStack->getCurrentPane();
    if (!pane) return 0;

    Layer *layer = pane->getSelectedLayer();

    if (!dynamic_cast<TimeInstantLayer *>(layer) &&
        !dynamic_cast<TimeValueLayer *>(layer) &&
        !dynamic_cast<RegionLayer *>(layer) &&
        !dynamic_cast<TimeRulerLayer *>(layer)) {

        layer = 0;

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

    return layer;
}

void
MainWindowBase::stop()
{
    m_playSource->stop();

    if (m_paneStack && m_paneStack->getCurrentPane()) {
        updateVisibleRangeDisplay(m_paneStack->getCurrentPane());
    } else {
        m_myStatusMessage = "";
        statusBar()->showMessage("");
    }
}

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

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

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

void
MainWindowBase::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_added = true;
}

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

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

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

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

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

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

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

void
MainWindowBase::editCurrentLayer()
{
    Layer *layer = 0;
    Pane *pane = m_paneStack->getCurrentPane();
    if (pane) layer = pane->getSelectedLayer();
    if (!layer) return;

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

    TabularModel *tabular = dynamic_cast<TabularModel *>(model);
    if (!tabular) {
        //!!! how to prevent this function from being active if not
        //appropriate model type?  or will we ultimately support
        //tabular display for all editable models?
        SVDEBUG << "NOTE: Not a tabular model" << endl;
        return;
    }

    if (m_layerDataDialogMap.find(layer) != m_layerDataDialogMap.end()) {
        if (!m_layerDataDialogMap[layer].isNull()) {
            m_layerDataDialogMap[layer]->show();
            m_layerDataDialogMap[layer]->raise();
            return;
        }
    }

    QString title = layer->getLayerPresentationName();

    ModelDataTableDialog *dialog = new ModelDataTableDialog(tabular, title, this);
    dialog->setAttribute(Qt::WA_DeleteOnClose);
    
    connectLayerEditDialog(dialog);

    m_layerDataDialogMap[layer] = dialog;
    m_viewDataDialogMap[pane].insert(dialog);

    dialog->show();
}

void
MainWindowBase::connectLayerEditDialog(ModelDataTableDialog *dialog)
{
    connect(m_viewManager,
            SIGNAL(globalCentreFrameChanged(unsigned long)),
            dialog,
            SLOT(userScrolledToFrame(unsigned long)));

    connect(m_viewManager,
            SIGNAL(playbackFrameChanged(unsigned long)),
            dialog,
            SLOT(playbackScrolledToFrame(unsigned long)));

    connect(dialog,
            SIGNAL(scrollToFrame(unsigned long)),
            m_viewManager,
            SLOT(setGlobalCentreFrame(unsigned long)));

    connect(dialog,
            SIGNAL(scrollToFrame(unsigned long)),
            m_viewManager,
            SLOT(setPlaybackFrame(unsigned long)));
}    

void
MainWindowBase::previousPane()
{
    if (!m_paneStack) return;

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

    for (int i = 0; i < m_paneStack->getPaneCount(); ++i) {
        if (m_paneStack->getPane(i) == currentPane) {
            if (i == 0) return;
            m_paneStack->setCurrentPane(m_paneStack->getPane(i-1));
            updateMenuStates();
            return;
        }
    }
}

void
MainWindowBase::nextPane()
{
    if (!m_paneStack) return;

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

    for (int i = 0; i < m_paneStack->getPaneCount(); ++i) {
        if (m_paneStack->getPane(i) == currentPane) {
            if (i == m_paneStack->getPaneCount()-1) return;
            m_paneStack->setCurrentPane(m_paneStack->getPane(i+1));
            updateMenuStates();
            return;
        }
    }
}

void
MainWindowBase::previousLayer()
{
    //!!! Not right -- pane lists layers in stacking order

    if (!m_paneStack) return;

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

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

    for (int i = 0; i < currentPane->getLayerCount(); ++i) {
        if (currentPane->getLayer(i) == currentLayer) {
            if (i == 0) return;
            m_paneStack->setCurrentLayer(currentPane,
                                         currentPane->getLayer(i-1));
            updateMenuStates();
            return;
        }
    }
}

void
MainWindowBase::nextLayer()
{
    //!!! Not right -- pane lists layers in stacking order

    if (!m_paneStack) return;

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

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

    for (int i = 0; i < currentPane->getLayerCount(); ++i) {
        if (currentPane->getLayer(i) == currentLayer) {
            if (i == currentPane->getLayerCount()-1) return;
            m_paneStack->setCurrentLayer(currentPane,
                                         currentPane->getLayer(i+1));
            updateMenuStates();
            return;
        }
    }
}

void
MainWindowBase::playbackFrameChanged(unsigned long frame)
{
    if (!(m_playSource && m_playSource->isPlaying()) || !getMainModel()) return;

    updatePositionStatusDisplays();

    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
MainWindowBase::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
MainWindowBase::viewCentreFrameChanged(View *v, unsigned long frame)
{
//    SVDEBUG << "MainWindowBase::viewCentreFrameChanged(" << v << "," << frame << ")" << endl;

    if (m_viewDataDialogMap.find(v) != m_viewDataDialogMap.end()) {
        for (DataDialogSet::iterator i = m_viewDataDialogMap[v].begin();
             i != m_viewDataDialogMap[v].end(); ++i) {
            (*i)->userScrolledToFrame(frame);
        }
    }
    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
MainWindowBase::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
MainWindowBase::layerAdded(Layer *)
{
//    SVDEBUG << "MainWindowBase::layerAdded(" << layer << ")" << endl;
    updateMenuStates();
}

void
MainWindowBase::layerRemoved(Layer *)
{
//    SVDEBUG << "MainWindowBase::layerRemoved(" << layer << ")" << endl;
    updateMenuStates();
}

void
MainWindowBase::layerAboutToBeDeleted(Layer *layer)
{
//    SVDEBUG << "MainWindowBase::layerAboutToBeDeleted(" << layer << ")" << endl;

    removeLayerEditDialog(layer);

    if (m_timeRulerLayer && (layer == m_timeRulerLayer)) {
//	cerr << "(this is the time ruler layer)" << endl;
	m_timeRulerLayer = 0;
    }
}

void
MainWindowBase::layerInAView(Layer *layer, bool inAView)
{
//    SVDEBUG << "MainWindowBase::layerInAView(" << layer << "," << inAView << ")" << endl;

    if (!inAView) removeLayerEditDialog(layer);

    // 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 &&
                        !dynamic_cast<TimeRulerLayer *>(pl) &&
                        (pl->getModel() == model)) {
                        found = true;
                        break;
                    }
                }
                if (found) break;
            }
            if (!found) {
                m_playSource->removeModel(model);
            }
        }
    }

    updateMenuStates();
}

void
MainWindowBase::removeLayerEditDialog(Layer *layer)
{
    if (m_layerDataDialogMap.find(layer) != m_layerDataDialogMap.end()) {

        ModelDataTableDialog *dialog = m_layerDataDialogMap[layer];

        for (ViewDataDialogMap::iterator vi = m_viewDataDialogMap.begin();
             vi != m_viewDataDialogMap.end(); ++vi) {
            vi->second.erase(dialog);
        }

        m_layerDataDialogMap.erase(layer);
        delete dialog;
    }
}

void
MainWindowBase::modelAdded(Model *model)
{
//    SVDEBUG << "MainWindowBase::modelAdded(" << model << ")" << endl;
    m_playSource->addModel(model);
}

void
MainWindowBase::mainModelChanged(WaveFileModel *model)
{
//    SVDEBUG << "MainWindowBase::mainModelChanged(" << model << ")" << endl;
    updateDescriptionLabel();
    if (model) m_viewManager->setMainModelSampleRate(model->getSampleRate());
    if (model && !m_playTarget && m_audioOutput) createPlayTarget();
}

void
MainWindowBase::modelAboutToBeDeleted(Model *model)
{
//    SVDEBUG << "MainWindowBase::modelAboutToBeDeleted(" << model << ")" << endl;
    if (model == m_viewManager->getPlaybackModel()) {
        m_viewManager->setPlaybackModel(0);
    }
    m_playSource->removeModel(model);
    FFTDataServer::modelAboutToBeDeleted(model);
}

void
MainWindowBase::paneDeleteButtonClicked(Pane *pane)
{
    bool found = false;
    for (int i = 0; i < m_paneStack->getPaneCount(); ++i) {
        if (m_paneStack->getPane(i) == pane) {
            found = true;
            break;
        }
    }
    if (!found) {
        SVDEBUG << "MainWindowBase::paneDeleteButtonClicked: Unknown pane "
                  << pane << endl;
        return;
    }

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

    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
MainWindowBase::pollOSC()
{
    if (!m_oscQueue || m_oscQueue->isEmpty()) return;
    SVDEBUG << "MainWindowBase::pollOSC: have " << m_oscQueue->getMessagesAvailable() << " messages" << 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
MainWindowBase::inProgressSelectionChanged()
{
    Pane *currentPane = 0;
    if (m_paneStack) currentPane = m_paneStack->getCurrentPane();
    if (currentPane) updateVisibleRangeDisplay(currentPane);
}

void
MainWindowBase::contextHelpChanged(const QString &s)
{
    if (s == "" && m_myStatusMessage != "") {
        statusBar()->showMessage(m_myStatusMessage);
        return;
    }
    statusBar()->showMessage(s);
}

void
MainWindowBase::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
}