Chris@578: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@578: 
Chris@578: /*
Chris@578:     Sonic Visualiser
Chris@578:     An audio file viewer and annotation editor.
Chris@578:     Centre for Digital Music, Queen Mary, University of London.
Chris@578:     This file copyright 2006 Chris Cannam and QMUL.
Chris@578:     
Chris@578:     This program is free software; you can redistribute it and/or
Chris@578:     modify it under the terms of the GNU General Public License as
Chris@578:     published by the Free Software Foundation; either version 2 of the
Chris@578:     License, or (at your option) any later version.  See the file
Chris@578:     COPYING included with this distribution for more information.
Chris@578: */
Chris@578: 
Chris@578: #include "MainWindow.h"
Chris@578: 
Chris@578: #include "system/System.h"
Chris@578: #include "system/Init.h"
Chris@578: #include "base/TempDirectory.h"
Chris@578: #include "base/PropertyContainer.h"
Chris@578: #include "base/Preferences.h"
Chris@578: #include "widgets/TipDialog.h"
Chris@578: #include "transform/TransformFactory.h"
Chris@578: 
Chris@578: #include <QMetaType>
Chris@578: #include <QApplication>
Chris@578: #include <QDesktopWidget>
Chris@578: #include <QMessageBox>
Chris@578: #include <QTranslator>
Chris@578: #include <QLocale>
Chris@578: #include <QSettings>
Chris@578: #include <QIcon>
Chris@578: #include <QSessionManager>
Chris@578: #include <QDir>
Chris@578: #include <QSplashScreen>
Chris@578: #include <QTimer>
Chris@578: #include <QPainter>
Chris@578: #include <QFileOpenEvent>
Chris@578: 
Chris@578: #include "../version.h"
Chris@578: 
Chris@578: #include <iostream>
Chris@578: #include <signal.h>
Chris@578: 
Chris@578: #ifdef HAVE_FFTW3F
Chris@578: #include <fftw3.h>
Chris@578: #endif
Chris@578: 
Chris@578: /*! \mainpage Sonic Visualiser
Chris@578: 
Chris@578: \section interesting Summary of interesting classes
Chris@578: 
Chris@578:  - Data models: Model and subclasses, e.g. WaveFileModel
Chris@578: 
Chris@578:  - Graphical layers: Layer and subclasses, displayed on View and its
Chris@578:  subclass widgets.
Chris@578: 
Chris@578:  - Main window class, document class, and file parser: MainWindow,
Chris@578:  Document, SVFileReader
Chris@578: 
Chris@578:  - Turning one model (e.g. audio) into another (e.g. more audio, or a
Chris@578:  curve extracted from it): Transform, encapsulating the data that need
Chris@578:  to be stored to be able to reproduce a given transformation;
Chris@578:  TransformFactory, for discovering the available types of transform;
Chris@578:  ModelTransformerFactory, ModelTransformer and subclasses, providing
Chris@578:  the mechanisms for applying transforms to data models
Chris@578: 
Chris@578:  - Creating the plugins used by transforms: RealTimePluginFactory,
Chris@578:  FeatureExtractionPluginFactory.  See also the API documentation for
Chris@578:  Vamp feature extraction plugins at
Chris@578:  http://www.vamp-plugins.org/code-doc/.
Chris@578: 
Chris@578:  - File reading and writing code: AudioFileReader and subclasses,
Chris@578:  WavFileWriter, DataFileReader, SVFileReader
Chris@578: 
Chris@578:  - FFT calculation and cacheing: FFTModel, FFTDataServer
Chris@578: 
Chris@578:  - Widgets that show groups of editable properties: PropertyBox for
Chris@578:  layer properties (contained in a PropertyStack), PluginParameterBox
Chris@578:  for plugins (contained in a PluginParameterDialog)
Chris@578: 
Chris@578:  - Audio playback: AudioCallbackPlaySource and subclasses,
Chris@578:  AudioCallbackPlayTarget and subclasses, AudioGenerator
Chris@578: 
Chris@578: \section model Data sources: the Model hierarchy
Chris@578: 
Chris@578:    A Model is something containing, or knowing how to obtain, data.
Chris@578: 
Chris@578:    For example, WaveFileModel is a model that knows how to get data
Chris@578:    from an audio file; SparseTimeValueModel is a model containing
Chris@578:    editable "curve" data.
Chris@578: 
Chris@578:    Models typically subclass one of a number of abstract subclasses of
Chris@578:    Model.  For example, WaveFileModel subclasses DenseTimeValueModel,
Chris@578:    which describes an interface for models that have a value at each
Chris@578:    time point for a given sampling resolution.  (Note that
Chris@578:    WaveFileModel does not actually read the files itself: it uses
Chris@578:    AudioFileReader classes for that.  It just makes data from the
Chris@578:    files available in a Model.)  SparseTimeValueModel uses the
Chris@578:    SparseModel template class, which provides most of the
Chris@578:    implementation for models that contain a series of points of some
Chris@578:    sort -- also used by NoteModel, TextModel, and
Chris@578:    SparseOneDimensionalModel.
Chris@578: 
Chris@578:    Everything that goes on the screen originates from a model, via a
Chris@578:    layer (see below).  The models are contained in a Document object.
Chris@578:    There is no containment hierarchy or ordering of models in the
Chris@578:    document.  One model is the main model, which defines the sample
Chris@578:    rate for playback.
Chris@578: 
Chris@578:    A model may also be marked as a "derived" model, which means it was
Chris@578:    generated from another model using some transform (feature
Chris@578:    extraction or effect plugin, etc) -- the idea being that they can
Chris@578:    be re-generated using the same transform if a new source model is
Chris@578:    loaded.
Chris@578: 
Chris@578: \section layer Things that can display data: the Layer hierarchy
Chris@578: 
Chris@578:    A Layer is something that knows how to draw parts of a model onto a
Chris@578:    timeline.
Chris@578: 
Chris@578:    For example, WaveformLayer is a layer which draws waveforms, based
Chris@578:    on WaveFileModel; TimeValueLayer draws curves, based on
Chris@578:    SparseTimeValueModel; SpectrogramLayer draws spectrograms, based on
Chris@578:    WaveFileModel (via FFTModel).
Chris@578: 
Chris@578:    The most basic functions of a layer are: to draw itself onto a
Chris@578:    Pane, against a timeline on the x axis; and to permit user
Chris@578:    interaction.  If you were thinking of adding the capability to
Chris@578:    display a new sort of something, then you would want to add a new
Chris@578:    layer type.  (You may also need a new model type, depending on
Chris@578:    whether any existing model can capture the data you need.)
Chris@578:    Depending on the sort of data in question, there are various
Chris@578:    existing layers that might be appropriate to start from -- for
Chris@578:    example, a layer that displays images that the user has imported
Chris@578:    and associated with particular times might have something in common
Chris@578:    with the existing TextLayer which displays pieces of text that are
Chris@578:    associated with particular times.
Chris@578: 
Chris@578:    Although layers are visual objects, they are contained in the
Chris@578:    Document in Sonic Visualiser rather than being managed together
Chris@578:    with display widgets.  The Sonic Visualiser file format has
Chris@578:    separate data and layout sections, and the layers are defined in
Chris@578:    the data section and then referred to in the layout section which
Chris@578:    determines which layers may go on which panes (see Pane below).
Chris@578: 
Chris@578:    Once a layer class is defined, some basic data about it needs to be
Chris@578:    set up in the LayerFactory class, and then it will appear in the
Chris@578:    menus and so on on the main window.
Chris@578: 
Chris@578: \section view Widgets that are used to show layers: The View hierarchy
Chris@578: 
Chris@578:    A View is a widget that displays a stack of layers.  The most
Chris@578:    important subclass is Pane, the widget that is used to show most of
Chris@578:    the data in the main window of Sonic Visualiser.
Chris@578: 
Chris@578:    All a pane really does is contain a set of layers and get them to
Chris@578:    render themselves (one on top of the other, with the topmost layer
Chris@578:    being the one that is currently interacted with), cache the
Chris@578:    results, negotiate user interaction with them, and so on.  This is
Chris@578:    generally fiddly, if not especially interesting.  Panes are
Chris@578:    strictly layout objects and are not stored in the Document class;
Chris@578:    instead the MainWindow contains a PaneStack widget (the widget that
Chris@578:    takes up most of Sonic Visualiser's main window) which contains a
Chris@578:    set of panes stacked vertically.
Chris@578: 
Chris@578:    Another View subclass is Overview, which is the widget that
Chris@578:    contains that green waveform showing the entire file at the bottom
Chris@578:    of the window.
Chris@578: 
Chris@578: */
Chris@578: 
Chris@578: static QMutex cleanupMutex;
Chris@578: 
Chris@578: static void
Chris@578: signalHandler(int /* signal */)
Chris@578: {
Chris@578:     // Avoid this happening more than once across threads
Chris@578: 
Chris@578:     cleanupMutex.lock();
Chris@578:     std::cerr << "signalHandler: cleaning up and exiting" << std::endl;
Chris@578:     TempDirectory::getInstance()->cleanup();
Chris@578:     exit(0); // without releasing mutex
Chris@578: }
Chris@578: 
Chris@578: class SVApplication : public QApplication
Chris@578: {
Chris@578: public:
Chris@578:     SVApplication(int &argc, char **argv) :
Chris@578:         QApplication(argc, argv),
Chris@578:         m_readyForFiles(false),
Chris@578:         m_filepathQueue(QStringList()),
Chris@578:         m_mainWindow(0)
Chris@578:     {
Chris@578: #ifdef Q_OS_MAC
Chris@578:         // Override the Qt plugin load path. The default contains the
Chris@578:         // Qt installation location as well as the application
Chris@578:         // directory, but we don't ever want to load plugins from
Chris@578:         // outside the app bundle because we don't know for sure what
Chris@578:         // (potentially different) versions of the Qt framework
Chris@578:         // libraries they may have dyld dependencies on.
Chris@578:         QString apploc(applicationFilePath());
Chris@578:         apploc.truncate(apploc.lastIndexOf(QLatin1Char('/')));
Chris@578:         apploc = QDir(apploc).canonicalPath();
Chris@578:         if (QFile::exists(apploc)) {
Chris@578:             setLibraryPaths(QStringList() << apploc);
Chris@578:         } else {
Chris@578:             setLibraryPaths(QStringList());
Chris@578:         }
Chris@578: #endif
Chris@578:     }
Chris@578:     virtual ~SVApplication() { }
Chris@578: 
Chris@578:     void setMainWindow(MainWindow *mw) { m_mainWindow = mw; }
Chris@578:     void releaseMainWindow() { m_mainWindow = 0; }
Chris@578: 
Chris@578:     virtual void commitData(QSessionManager &manager) {
Chris@578:         if (!m_mainWindow) return;
Chris@578:         bool mayAskUser = manager.allowsInteraction();
Chris@578:         bool success = m_mainWindow->commitData(mayAskUser);
Chris@578:         manager.release();
Chris@578:         if (!success) manager.cancel();
Chris@578:     }
Chris@578: 
Chris@578:     void handleFilepathArgument(QString path, QSplashScreen *splash);
Chris@578: 
Chris@578:     bool m_readyForFiles;
Chris@578:     QStringList m_filepathQueue;
Chris@578: 
Chris@578: protected:
Chris@578:     MainWindow *m_mainWindow;
Chris@578:     bool event(QEvent *);
Chris@578: 
Chris@578: };
Chris@578: 
Chris@578: int
Chris@578: main(int argc, char **argv)
Chris@578: {
Chris@578:     svSystemSpecificInitialisation();
Chris@578: 
Chris@578: #ifdef Q_WS_X11
Chris@578: #if QT_VERSION >= 0x040500
Chris@578: //    QApplication::setGraphicsSystem("raster");
Chris@578: #endif
Chris@578: #endif
Chris@578: 
Chris@578:     SVApplication application(argc, argv);
Chris@578: 
Chris@578:     QStringList args = application.arguments();
Chris@578: 
Chris@578:     signal(SIGINT,  signalHandler);
Chris@578:     signal(SIGTERM, signalHandler);
Chris@578: 
Chris@578: #ifndef Q_WS_WIN32
Chris@578: //???    signal(SIGHUP,  signalHandler);
Chris@578: //???    signal(SIGQUIT, signalHandler);
Chris@578: #endif
Chris@578: 
Chris@578:     bool audioOutput = true;
Chris@578:     bool oscSupport = true;
Chris@578: 
Chris@578:     if (args.contains("--help") || args.contains("-h") || args.contains("-?")) {
Chris@578:         std::cerr << QApplication::tr(
Chris@578:             "\nSonic Visualiser is a program for viewing and exploring audio data\nfor semantic music analysis and annotation.\n\nUsage:\n\n  %1 [--no-audio] [--no-osc] [<file> ...]\n\n  --no-audio: Do not attempt to open an audio output device\n  --no-osc: Do not provide an Open Sound Control port for remote control\n  <file>: One or more Sonic Visualiser (.sv) and audio files may be provided.\n").arg(argv[0]) << std::endl;
Chris@578:         exit(2);
Chris@578:     }
Chris@578: 
Chris@578:     if (args.contains("--no-audio")) audioOutput = false;
Chris@578:     if (args.contains("--no-osc")) oscSupport = false;
Chris@578: 
Chris@578:     QApplication::setOrganizationName("sonic-visualiser");
Chris@578:     QApplication::setOrganizationDomain("sonicvisualiser.org");
Chris@578:     QApplication::setApplicationName(QApplication::tr("Sonic Visualiser"));
Chris@578: 
Chris@578:     QSplashScreen *splash = 0;
Chris@578: 
Chris@578:     QSettings settings;
Chris@578: 
Chris@578:     settings.beginGroup("Preferences");
Chris@578:     if (settings.value("show-splash", true).toBool()) {
Chris@578:         QPixmap pixmap(":/icons/sv-splash.png");
Chris@578:         QPainter painter;
Chris@578:         painter.begin(&pixmap);
Chris@578:         QString text = QString("v%1").arg(SV_VERSION);
Chris@578:         painter.drawText
Chris@578:             (pixmap.width() - painter.fontMetrics().width(text) - 10,
Chris@578:              10 + painter.fontMetrics().ascent(),
Chris@578:              text);
Chris@578:         painter.end();
Chris@578:         splash = new QSplashScreen(pixmap);
Chris@578:         splash->show();
Chris@578:         QTimer::singleShot(5000, splash, SLOT(hide()));
Chris@578:         application.processEvents();
Chris@578:     }
Chris@578:     settings.endGroup();
Chris@578: 
Chris@578:     settings.beginGroup("RDF");
Chris@578:     if (!settings.contains("rdf-indices")) {
Chris@578:         QStringList list;
Chris@578:         list << "http://www.vamp-plugins.org/rdf/plugins/index.txt";
Chris@578:         settings.setValue("rdf-indices", list);
Chris@578:     }
Chris@578:     settings.endGroup();
Chris@578: 
Chris@578:     QIcon icon;
Chris@578:     int sizes[] = { 16, 22, 24, 32, 48, 64, 128 };
Chris@578:     for (int i = 0; i < sizeof(sizes)/sizeof(sizes[0]); ++i) {
Chris@578:         icon.addFile(QString(":icons/sv-%1x%2.png").arg(sizes[i]).arg(sizes[i]));
Chris@578:     }
Chris@578:     QApplication::setWindowIcon(icon);
Chris@578: 
Chris@578:     QString language = QLocale::system().name();
Chris@578: 
Chris@578:     QTranslator qtTranslator;
Chris@578:     QString qtTrName = QString("qt_%1").arg(language);
Chris@578:     SVDEBUG << "Loading " << qtTrName << "... ";
Chris@578:     bool success = false;
Chris@578:     if (!(success = qtTranslator.load(qtTrName))) {
Chris@578:         QString qtDir = getenv("QTDIR");
Chris@578:         if (qtDir != "") {
Chris@578:             success = qtTranslator.load
Chris@578:                 (qtTrName, QDir(qtDir).filePath("translations"));
Chris@578:         }
Chris@578:     }
Chris@578:     if (!success) {
Chris@578:         SVDEBUG << "Failed\nFailed to load Qt translation for locale" << endl;
Chris@578:     } else {
Chris@578:         std::cerr << "Done" << std::endl;
Chris@578:     }
Chris@578:     application.installTranslator(&qtTranslator);
Chris@578: 
Chris@578:     QTranslator svTranslator;
Chris@578:     QString svTrName = QString("sonic-visualiser_%1").arg(language);
Chris@578:     SVDEBUG << "Loading " << svTrName << "... ";
Chris@578:     svTranslator.load(svTrName, ":i18n");
Chris@578:     SVDEBUG << "Done" << endl;
Chris@578:     application.installTranslator(&svTranslator);
Chris@578: 
Chris@578:     StoreStartupLocale();
Chris@578: 
Chris@578:     // Permit size_t and PropertyName to be used as args in queued signal calls
Chris@578:     qRegisterMetaType<size_t>("size_t");
Chris@578:     qRegisterMetaType<PropertyContainer::PropertyName>("PropertyContainer::PropertyName");
Chris@578: 
Chris@578:     MainWindow *gui = new MainWindow(audioOutput, oscSupport);
Chris@578:     application.setMainWindow(gui);
Chris@578:     if (splash) {
Chris@578:         QObject::connect(gui, SIGNAL(hideSplash()), splash, SLOT(hide()));
Chris@578:     }
Chris@578: 
Chris@578:     QDesktopWidget *desktop = QApplication::desktop();
Chris@578:     QRect available = desktop->availableGeometry();
Chris@578: 
Chris@578:     int width = (available.width() * 2) / 3;
Chris@578:     int height = available.height() / 2;
Chris@578:     if (height < 450) height = (available.height() * 2) / 3;
Chris@578:     if (width > height * 2) width = height * 2;
Chris@578: 
Chris@578:     settings.beginGroup("MainWindow");
Chris@578:     QSize size = settings.value("size", QSize(width, height)).toSize();
Chris@578:     gui->resizeConstrained(size);
Chris@578:     if (settings.contains("position")) {
Chris@578:         QRect prevrect(settings.value("position").toPoint(), size);
Chris@578:         if (!(available & prevrect).isEmpty()) {
Chris@578:             gui->move(prevrect.topLeft());
Chris@578:         }
Chris@578:     }
Chris@578:     settings.endGroup();
Chris@578:     
Chris@578:     gui->show();
Chris@578: 
Chris@578:     // The MainWindow class seems to have trouble dealing with this if
Chris@578:     // it tries to adapt to this preference before the constructor is
Chris@578:     // complete.  As a lazy hack, apply it explicitly from here
Chris@578:     gui->preferenceChanged("Property Box Layout");
Chris@578: 
Chris@578:     application.m_readyForFiles = true; // Ready to receive files from e.g. Apple Events
Chris@578: 
Chris@578:     for (QStringList::iterator i = args.begin(); i != args.end(); ++i) {
Chris@578: 
Chris@578:         if (i == args.begin()) continue;
Chris@578:         if (i->startsWith('-')) continue;
Chris@578: 
Chris@578:         QString path = *i;
Chris@578: 
Chris@578:         application.handleFilepathArgument(path, splash);
Chris@578:     }
Chris@578:     
Chris@578:     for (QStringList::iterator i = application.m_filepathQueue.begin(); i != application.m_filepathQueue.end(); ++i) {
Chris@578:         QString path = *i;
Chris@578:         application.handleFilepathArgument(path, splash);
Chris@578:     }
Chris@578:     
Chris@578: #ifdef HAVE_FFTW3F
Chris@578:     settings.beginGroup("FFTWisdom");
Chris@578:     QString wisdom = settings.value("wisdom").toString();
Chris@578:     if (wisdom != "") {
Chris@578:         fftwf_import_wisdom_from_string(wisdom.toLocal8Bit().data());
Chris@578:     }
Chris@578: #ifdef HAVE_FFTW3
Chris@578:     wisdom = settings.value("wisdom_d").toString();
Chris@578:     if (wisdom != "") {
Chris@578:         fftw_import_wisdom_from_string(wisdom.toLocal8Bit().data());
Chris@578:     }
Chris@578: #endif
Chris@578:     settings.endGroup();
Chris@578: #endif
Chris@578: 
Chris@578:     if (splash) splash->finish(gui);
Chris@578:     delete splash;
Chris@578: 
Chris@578: /*
Chris@578:     TipDialog tipDialog;
Chris@578:     if (tipDialog.isOK()) {
Chris@578:         tipDialog.exec();
Chris@578:     }
Chris@578: */
Chris@578:     int rv = application.exec();
Chris@578: 
Chris@578:     gui->hide();
Chris@578: 
Chris@578:     cleanupMutex.lock();
Chris@578: 
Chris@578:     TransformFactory::deleteInstance();
Chris@578:     TempDirectory::getInstance()->cleanup();
Chris@578:     application.releaseMainWindow();
Chris@578: 
Chris@578: #ifdef HAVE_FFTW3F
Chris@578:     settings.beginGroup("FFTWisdom");
Chris@578:     char *cwisdom = fftwf_export_wisdom_to_string();
Chris@578:     if (cwisdom) {
Chris@578:         settings.setValue("wisdom", cwisdom);
Chris@578:         free(cwisdom);
Chris@578:     }
Chris@578: #ifdef HAVE_FFTW3
Chris@578:     cwisdom = fftw_export_wisdom_to_string();
Chris@578:     if (cwisdom) {
Chris@578:         settings.setValue("wisdom_d", cwisdom);
Chris@578:         free(cwisdom);
Chris@578:     }
Chris@578: #endif
Chris@578:     settings.endGroup();
Chris@578: #endif
Chris@578: 
Chris@578:     delete gui;
Chris@578: 
Chris@578:     cleanupMutex.unlock();
Chris@578: 
Chris@578:     return rv;
Chris@578: }
Chris@578: 
Chris@578: bool SVApplication::event(QEvent *event){
Chris@578:     QString thePath;
Chris@578:     switch (event->type()) {
Chris@578:     case QEvent::FileOpen:
Chris@578:         thePath = static_cast<QFileOpenEvent *>(event)->file();
Chris@578:         if(m_readyForFiles)
Chris@578:             handleFilepathArgument(thePath, NULL);
Chris@578:         else
Chris@578:             m_filepathQueue.append(thePath);
Chris@578:         return true;
Chris@578:     default:
Chris@578:         return QApplication::event(event);
Chris@578:     }
Chris@578: }
Chris@578: 
Chris@578: /** Application-global handler for filepaths passed in, e.g. as command-line arguments or apple events */
Chris@578: void SVApplication::handleFilepathArgument(QString path, QSplashScreen *splash){
Chris@578:     static bool haveSession = false;
Chris@578:     static bool haveMainModel = false;
Chris@578:     static bool havePriorCommandLineModel = false;
Chris@578: 
Chris@578:     MainWindow::FileOpenStatus status = MainWindow::FileOpenFailed;
Chris@578: 
Chris@578:     if (path.endsWith("sv")) {
Chris@578:         if (!haveSession) {
Chris@578:             status = m_mainWindow->openSessionFile(path);
Chris@578:             if (status == MainWindow::FileOpenSucceeded) {
Chris@578:                 haveSession = true;
Chris@578:                 haveMainModel = true;
Chris@578:             }
Chris@578:         } else {
Chris@578:             std::cerr << "WARNING: Ignoring additional session file argument \"" << path << "\"" << std::endl;
Chris@578:             status = MainWindow::FileOpenSucceeded;
Chris@578:         }
Chris@578:     }
Chris@578:     if (status != MainWindow::FileOpenSucceeded) {
Chris@578:         if (!haveMainModel) {
Chris@578:             status = m_mainWindow->open(path, MainWindow::ReplaceSession);
Chris@578:             if (status == MainWindow::FileOpenSucceeded) {
Chris@578:                 haveMainModel = true;
Chris@578:             }
Chris@578:         } else {
Chris@578:             if (haveSession && !havePriorCommandLineModel) {
Chris@578:                 status = m_mainWindow->open(path, MainWindow::AskUser);
Chris@578:                 if (status == MainWindow::FileOpenSucceeded) {
Chris@578:                     havePriorCommandLineModel = true;
Chris@578:                 }
Chris@578:             } else {
Chris@578:                 status = m_mainWindow->open(path, MainWindow::CreateAdditionalModel);
Chris@578:             }
Chris@578:         }
Chris@578:     }
Chris@578:     if (status == MainWindow::FileOpenFailed) {
Chris@578:         if (splash) splash->hide();
Chris@578:         QMessageBox::critical
Chris@578:             (m_mainWindow, QMessageBox::tr("Failed to open file"),
Chris@578:              QMessageBox::tr("File or URL \"%1\" could not be opened").arg(path));
Chris@578:     } else if (status == MainWindow::FileOpenWrongMode) {
Chris@578:         if (splash) splash->hide();
Chris@578:         QMessageBox::critical
Chris@578:             (m_mainWindow, QMessageBox::tr("Failed to open file"),
Chris@578:              QMessageBox::tr("<b>Audio required</b><p>Please load at least one audio file before importing annotation data"));
Chris@578:     }
Chris@578: }