annotate main/PreferencesDialog.cpp @ 2152:60d78294ea3a

Oookay... Travis's Trusty image is now too old for the bundled hg to be able to connect to Bitbucket after the latter switched off TLS 1.0 and 1.1 support this month. So we must either use a newer image, or find another workaround. Let's try the newer image first, since we'd probably be using that already if it had existed when we set this up

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

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

#include "PreferencesDialog.h"

#include <QGridLayout>
#include <QComboBox>
#include <QCheckBox>
#include <QGroupBox>
#include <QDoubleSpinBox>
#include <QLabel>
#include <QPushButton>
#include <QHBoxLayout>
#include <QString>
#include <QDialogButtonBox>
#include <QMessageBox>
#include <QTabWidget>
#include <QLineEdit>
#include <QFileDialog>
#include <QSpinBox>
#include <QListWidget>
#include <QSettings>

#include <set>

#include "widgets/WindowTypeSelector.h"
#include "widgets/IconLoader.h"
#include "widgets/ColourMapComboBox.h"
#include "widgets/ColourComboBox.h"
#include "widgets/PluginPathConfigurator.h"
#include "widgets/WidgetScale.h"
#include "base/Preferences.h"
#include "base/ResourceFinder.h"
#include "layer/ColourMapper.h"
#include "layer/ColourDatabase.h"

#include "bqaudioio/AudioFactory.h"

#include "../version.h"

using namespace std;

PreferencesDialog::PreferencesDialog(QWidget *parent) :
    QDialog(parent),
    m_audioImplementation(0),
    m_audioPlaybackDevice(0),
    m_audioRecordDevice(0),
    m_audioDeviceChanged(false),
    m_coloursChanged(false),
    m_changesOnRestart(false)
{
    setWindowTitle(tr("Sonic Visualiser: Application Preferences"));

    Preferences *prefs = Preferences::getInstance();

    QGridLayout *grid = new QGridLayout;
    setLayout(grid);

    m_tabs = new QTabWidget;
    grid->addWidget(m_tabs, 0, 0);
    
    m_tabs->setTabPosition(QTabWidget::North);

    // Create this first, as slots that get called from the ctor will
    // refer to it
    m_applyButton = new QPushButton(tr("Apply"));

    // Create all the preference widgets first, then create the
    // individual tab widgets and place the preferences in their
    // appropriate places in one go afterwards

    int min, max, deflt, i;

    m_windowType = WindowType(prefs->getPropertyRangeAndValue
                              ("Window Type", &min, &max, &deflt));
    m_windowTypeSelector = new WindowTypeSelector(m_windowType);

    connect(m_windowTypeSelector, SIGNAL(windowTypeChanged(WindowType)),
            this, SLOT(windowTypeChanged(WindowType)));

    QCheckBox *vampProcessSeparation = new QCheckBox;
    m_runPluginsInProcess = prefs->getRunPluginsInProcess();
    vampProcessSeparation->setCheckState(m_runPluginsInProcess ? Qt::Unchecked :
                                         Qt::Checked);
    connect(vampProcessSeparation, SIGNAL(stateChanged(int)),
            this, SLOT(vampProcessSeparationChanged(int)));
    
    QComboBox *smoothing = new QComboBox;
    
    int sm = prefs->getPropertyRangeAndValue("Spectrogram Y Smoothing", &min, &max,
                                             &deflt);
    m_spectrogramSmoothing = sm;

    for (i = min; i <= max; ++i) {
        smoothing->addItem(prefs->getPropertyValueLabel("Spectrogram Y Smoothing", i));
    }

    smoothing->setCurrentIndex(sm);

    connect(smoothing, SIGNAL(currentIndexChanged(int)),
            this, SLOT(spectrogramSmoothingChanged(int)));

    QComboBox *xsmoothing = new QComboBox;
    
    int xsm = prefs->getPropertyRangeAndValue("Spectrogram X Smoothing", &min, &max,
                                             &deflt);
    m_spectrogramXSmoothing = xsm;

    for (i = min; i <= max; ++i) {
        xsmoothing->addItem(prefs->getPropertyValueLabel("Spectrogram X Smoothing", i));
    }

    xsmoothing->setCurrentIndex(xsm);

    connect(xsmoothing, SIGNAL(currentIndexChanged(int)),
            this, SLOT(spectrogramXSmoothingChanged(int)));

    QComboBox *propertyLayout = new QComboBox;
    int pl = prefs->getPropertyRangeAndValue("Property Box Layout", &min, &max,
                                         &deflt);
    m_propertyLayout = pl;

    for (i = min; i <= max; ++i) {
        propertyLayout->addItem(prefs->getPropertyValueLabel("Property Box Layout", i));
    }

    propertyLayout->setCurrentIndex(pl);

    connect(propertyLayout, SIGNAL(currentIndexChanged(int)),
            this, SLOT(propertyLayoutChanged(int)));

    QSettings settings;
    settings.beginGroup("Preferences");
    m_spectrogramGColour = (settings.value("spectrogram-colour",
                                           int(ColourMapper::Green)).toInt());
    m_spectrogramMColour = (settings.value("spectrogram-melodic-colour",
                                           int(ColourMapper::Sunset)).toInt());
    m_colour3DColour = (settings.value("colour-3d-plot-colour",
                                       int(ColourMapper::Green)).toInt());
    m_overviewColour = ColourDatabase::getInstance()->getColour(tr("Green"));
    if (settings.contains("overview-colour")) {
        QString qcolorName =
            settings.value("overview-colour", m_overviewColour.name())
            .toString();
        m_overviewColour.setNamedColor(qcolorName);
        SVCERR << "loaded colour " << m_overviewColour.name() << " from settings" << endl;
    }
    settings.endGroup();

    ColourMapComboBox *spectrogramGColour = new ColourMapComboBox(true);
    spectrogramGColour->setCurrentIndex(m_spectrogramGColour);

    ColourMapComboBox *spectrogramMColour = new ColourMapComboBox(true);
    spectrogramMColour->setCurrentIndex(m_spectrogramMColour);

    ColourMapComboBox *colour3DColour = new ColourMapComboBox(true);
    colour3DColour->setCurrentIndex(m_colour3DColour);

    // can't have "add new colour", as it gets saved in the session not in prefs
    ColourComboBox *overviewColour = new ColourComboBox(false);
    int overviewColourIndex =
        ColourDatabase::getInstance()->getColourIndex(m_overviewColour);
    SVCERR << "index = " << overviewColourIndex << " for colour " << m_overviewColour.name() << endl;
    if (overviewColourIndex >= 0) {
        overviewColour->setCurrentIndex(overviewColourIndex);
    }

    connect(spectrogramGColour, SIGNAL(colourMapChanged(int)),
            this, SLOT(spectrogramGColourChanged(int)));
    connect(spectrogramMColour, SIGNAL(colourMapChanged(int)),
            this, SLOT(spectrogramMColourChanged(int)));
    connect(colour3DColour, SIGNAL(colourMapChanged(int)),
            this, SLOT(colour3DColourChanged(int)));
    connect(overviewColour, SIGNAL(colourChanged(int)),
            this, SLOT(overviewColourChanged(int)));

    m_tuningFrequency = prefs->getTuningFrequency();

    QDoubleSpinBox *frequency = new QDoubleSpinBox;
    frequency->setMinimum(100.0);
    frequency->setMaximum(5000.0);
    frequency->setSuffix(" Hz");
    frequency->setSingleStep(1);
    frequency->setValue(m_tuningFrequency);
    frequency->setDecimals(2);

    connect(frequency, SIGNAL(valueChanged(double)),
            this, SLOT(tuningFrequencyChanged(double)));

    QComboBox *octaveSystem = new QComboBox;
    int oct = prefs->getPropertyRangeAndValue
        ("Octave Numbering System", &min, &max, &deflt);
    m_octaveSystem = oct;
    for (i = min; i <= max; ++i) {
        octaveSystem->addItem(prefs->getPropertyValueLabel
                              ("Octave Numbering System", i));
    }
    octaveSystem->setCurrentIndex(oct);

    connect(octaveSystem, SIGNAL(currentIndexChanged(int)),
            this, SLOT(octaveSystemChanged(int)));

    settings.beginGroup("Preferences");

    QComboBox *audioImplementation = new QComboBox;
    connect(audioImplementation, SIGNAL(currentIndexChanged(int)),
            this, SLOT(audioImplementationChanged(int)));

    m_audioPlaybackDeviceCombo = new QComboBox;
    connect(m_audioPlaybackDeviceCombo, SIGNAL(currentIndexChanged(int)),
            this, SLOT(audioPlaybackDeviceChanged(int)));

    m_audioRecordDeviceCombo = new QComboBox;
    connect(m_audioRecordDeviceCombo, SIGNAL(currentIndexChanged(int)),
            this, SLOT(audioRecordDeviceChanged(int)));

    vector<string> implementationNames =
        breakfastquay::AudioFactory::getImplementationNames();

    QString implementationName = settings.value("audio-target", "").toString();
    if (implementationName == "auto") implementationName = "";
    if (implementationName == "" && implementationNames.size() == 1) {
        // We won't be showing the implementations menu in this case
        implementationName = implementationNames[0].c_str();
    }

    audioImplementation->addItem(tr("(auto)"));
    m_audioImplementation = 0;

    for (int i = 0; in_range_for(implementationNames, i); ++i) {
        audioImplementation->addItem
            (breakfastquay::AudioFactory::getImplementationDescription
             (implementationNames[i]).c_str());
        if (implementationName.toStdString() == implementationNames[i]) {
            audioImplementation->setCurrentIndex(i+1);
            m_audioImplementation = i+1;
        }
    }
    
    settings.endGroup();

    rebuildDeviceCombos();
    m_audioDeviceChanged = false; // the rebuild will have changed this

    QCheckBox *resampleOnLoad = new QCheckBox;
    m_resampleOnLoad = prefs->getResampleOnLoad();
    resampleOnLoad->setCheckState(m_resampleOnLoad ? Qt::Checked :
                                  Qt::Unchecked);
    connect(resampleOnLoad, SIGNAL(stateChanged(int)),
            this, SLOT(resampleOnLoadChanged(int)));

    QCheckBox *gaplessMode = new QCheckBox;
    m_gapless = prefs->getUseGaplessMode();
    gaplessMode->setCheckState(m_gapless ? Qt::Checked : Qt::Unchecked);
    connect(gaplessMode, SIGNAL(stateChanged(int)),
            this, SLOT(gaplessModeChanged(int)));

    m_tempDirRootEdit = new QLineEdit;
    QString dir = prefs->getTemporaryDirectoryRoot();
    m_tempDirRoot = dir;
    dir.replace("$HOME", tr("<home directory>"));
    m_tempDirRootEdit->setText(dir);
    m_tempDirRootEdit->setReadOnly(true);
    QPushButton *tempDirButton = new QPushButton;
    tempDirButton->setIcon(IconLoader().load("fileopen"));
    connect(tempDirButton, SIGNAL(clicked()),
            this, SLOT(tempDirButtonClicked()));
    tempDirButton->setFixedSize(WidgetScale::scaleQSize(QSize(24, 24)));

    QCheckBox *showSplash = new QCheckBox;
    m_showSplash = prefs->getShowSplash();
    showSplash->setCheckState(m_showSplash ? Qt::Checked : Qt::Unchecked);
    connect(showSplash, SIGNAL(stateChanged(int)),
            this, SLOT(showSplashChanged(int)));

#ifdef NOT_DEFINED // This no longer works correctly on any platform AFAICS
    QComboBox *bgMode = new QComboBox;
    int bg = prefs->getPropertyRangeAndValue("Background Mode", &min, &max,
                                             &deflt);
    m_backgroundMode = bg;
    for (i = min; i <= max; ++i) {
        bgMode->addItem(prefs->getPropertyValueLabel("Background Mode", i));
    }
    bgMode->setCurrentIndex(bg);

    connect(bgMode, SIGNAL(currentIndexChanged(int)),
            this, SLOT(backgroundModeChanged(int)));
#endif

    settings.beginGroup("Preferences");

#ifdef Q_OS_MAC
    m_retina = settings.value("scaledHiDpi", true).toBool();
    QCheckBox *retina = new QCheckBox;
    retina->setCheckState(m_retina ? Qt::Checked : Qt::Unchecked);
    connect(retina, SIGNAL(stateChanged(int)), this, SLOT(retinaChanged(int)));
#else
    m_retina = false;
#endif

    QString userLocale = settings.value("locale", "").toString();
    m_currentLocale = userLocale;
    
    QString permishTag = QString("network-permission-%1").arg(SV_VERSION);
    m_networkPermission = settings.value(permishTag, false).toBool();

    settings.endGroup();

    QComboBox *locale = new QComboBox;
    QStringList localeFiles = QDir(":i18n").entryList(QStringList() << "*.qm");
    locale->addItem(tr("Follow system locale"));
    m_locales.push_back("");
    if (userLocale == "") {
        locale->setCurrentIndex(0);
    }
    foreach (QString f, localeFiles) {
        QString f0 = f;
        f.replace("sonic-visualiser_", "").replace(".qm", "");
        if (f == f0) { // our expectations about filename format were not met
            SVCERR << "INFO: Unexpected filename " << f << " in i18n resource directory" << endl;
        } else {
            m_locales.push_back(f);
            QString displayText;
            // Add new translations here
            if (f == "ru") displayText = tr("Russian");
            else if (f == "en_GB") displayText = tr("British English");
            else if (f == "en_US") displayText = tr("American English");
            else if (f == "cs_CZ") displayText = tr("Czech");
            else displayText = f;
            locale->addItem(QString("%1 [%2]").arg(displayText).arg(f));
            if (userLocale == f) {
                locale->setCurrentIndex(locale->count() - 1);
            }
        }
    }
    connect(locale, SIGNAL(currentIndexChanged(int)),
            this, SLOT(localeChanged(int)));

    QCheckBox *networkPermish = new QCheckBox;
    networkPermish->setCheckState(m_networkPermission ? Qt::Checked : Qt::Unchecked);
    connect(networkPermish, SIGNAL(stateChanged(int)),
            this, SLOT(networkPermissionChanged(int)));

    QSpinBox *fontSize = new QSpinBox;
    int fs = prefs->getPropertyRangeAndValue("View Font Size", &min, &max,
                                             &deflt);
    m_viewFontSize = fs;
    fontSize->setMinimum(min);
    fontSize->setMaximum(max);
    fontSize->setSuffix(" pt");
    fontSize->setSingleStep(1);
    fontSize->setValue(fs);

    connect(fontSize, SIGNAL(valueChanged(int)),
            this, SLOT(viewFontSizeChanged(int)));

    QComboBox *ttMode = new QComboBox;
    int tt = prefs->getPropertyRangeAndValue("Time To Text Mode", &min, &max,
                                             &deflt);
    m_timeToTextMode = tt;
    for (i = min; i <= max; ++i) {
        ttMode->addItem(prefs->getPropertyValueLabel("Time To Text Mode", i));
    }
    ttMode->setCurrentIndex(tt);

    connect(ttMode, SIGNAL(currentIndexChanged(int)),
            this, SLOT(timeToTextModeChanged(int)));

    QCheckBox *hms = new QCheckBox;
    int showHMS = prefs->getPropertyRangeAndValue
        ("Show Hours And Minutes", &min, &max, &deflt);
    m_showHMS = (showHMS != 0);
    hms->setCheckState(m_showHMS ? Qt::Checked : Qt::Unchecked);
    connect(hms, SIGNAL(stateChanged(int)),
            this, SLOT(showHMSChanged(int)));

    QFrame *frame = 0;
    QGridLayout *subgrid = 0;
    int row = 0;

    // Appearance tab

    frame = new QFrame;
    subgrid = new QGridLayout;
    frame->setLayout(subgrid);
    row = 0;

#ifdef Q_OS_MAC
    if (devicePixelRatio() > 1) {
        subgrid->addWidget(new QLabel(tr("Draw layers at Retina resolution:")), row, 0);
        subgrid->addWidget(retina, row++, 1, 1, 1);
    }
#endif

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Property Box Layout"))),
                       row, 0);
    subgrid->addWidget(propertyLayout, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(tr("Default spectrogram colour:")),
                       row, 0);
    subgrid->addWidget(spectrogramGColour, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(tr("Default melodic spectrogram colour:")),
                       row, 0);
    subgrid->addWidget(spectrogramMColour, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(tr("Default colour 3D plot colour:")),
                       row, 0);
    subgrid->addWidget(colour3DColour, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(tr("Overview waveform colour:")),
                       row, 0);
    subgrid->addWidget(overviewColour, row++, 1, 1, 2);

#ifdef NOT_DEFINED // see earlier
    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Background Mode"))),
                       row, 0);
    subgrid->addWidget(bgMode, row++, 1, 1, 2);
#endif

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("View Font Size"))),
                       row, 0);
    subgrid->addWidget(fontSize, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Time To Text Mode"))),
                       row, 0);
    subgrid->addWidget(ttMode, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Show Hours And Minutes"))),
                       row, 0);
    subgrid->addWidget(hms, row++, 1, 1, 1);

    subgrid->setRowStretch(row, 10);
    
    m_tabOrdering[AppearanceTab] = m_tabs->count();
    m_tabs->addTab(frame, tr("&Appearance"));

    // Analysis tab

    frame = new QFrame;
    subgrid = new QGridLayout;
    frame->setLayout(subgrid);
    row = 0;

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Tuning Frequency"))),
                       row, 0);
    subgrid->addWidget(frequency, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Octave Numbering System"))),
                       row, 0);
    subgrid->addWidget(octaveSystem, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(prefs->getPropertyLabel
                                  ("Spectrogram Y Smoothing")),
                       row, 0);
    subgrid->addWidget(smoothing, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(prefs->getPropertyLabel
                                  ("Spectrogram X Smoothing")),
                       row, 0);
    subgrid->addWidget(xsmoothing, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Window Type"))),
                       row, 0);
    subgrid->addWidget(m_windowTypeSelector, row++, 1, 2, 2);

    subgrid->setRowStretch(row, 10);
    row++;

    subgrid->addWidget(new QLabel(tr("Run Vamp plugins in separate process:")),
                       row, 0);
    subgrid->addWidget(vampProcessSeparation, row++, 1, 1, 1);
    
    subgrid->setRowStretch(row, 10);
    
    m_tabOrdering[AnalysisTab] = m_tabs->count();
    m_tabs->addTab(frame, tr("Anal&ysis"));

    // Template tab

    frame = new QFrame;
    subgrid = new QGridLayout;
    frame->setLayout(subgrid);
    row = 0;
    
    subgrid->addWidget(new QLabel(tr("Default session template when loading audio files:")), row++, 0);

    QListWidget *lw = new QListWidget();
    subgrid->addWidget(lw, row, 0);
    subgrid->setRowStretch(row, 10);
    row++;

    subgrid->addWidget(new QLabel(tr("(Use \"%1\" in the File menu to add to these.)")
                                  .arg(tr("Export Session as Template..."))),
                       row++, 0);

    settings.beginGroup("MainWindow");
    m_currentTemplate = settings.value("sessiontemplate", "").toString();
    settings.endGroup();

    lw->addItem(tr("Standard Waveform"));
    if (m_currentTemplate == "" || m_currentTemplate == "default") {
        lw->setCurrentRow(lw->count()-1);
    }
    m_templates.push_back("");

    QStringList templates = ResourceFinder().getResourceFiles("templates", "svt");

    set<QString> byName;
    foreach (QString t, templates) {
        byName.insert(QFileInfo(t).baseName());
    }

    foreach (QString t, byName) {
        if (t.toLower() == "default") continue;
        m_templates.push_back(t);
        lw->addItem(t);
        if (m_currentTemplate == t) {
            lw->setCurrentRow(lw->count()-1);
        }
    }

    connect(lw, SIGNAL(currentRowChanged(int)), this, SLOT(defaultTemplateChanged(int)));

    m_tabOrdering[TemplateTab] = m_tabs->count();
    m_tabs->addTab(frame, tr("Session &Template"));

    // Audio IO tab

    frame = new QFrame;
    subgrid = new QGridLayout;
    frame->setLayout(subgrid);
    row = 0;

    if (implementationNames.size() > 1) {
        subgrid->addWidget(new QLabel(tr("Audio service:")), row, 0);
        subgrid->addWidget(audioImplementation, row++, 1, 1, 2);
    }

    subgrid->addWidget(new QLabel(tr("Audio playback device:")), row, 0);
    subgrid->addWidget(m_audioPlaybackDeviceCombo, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(tr("Audio record device:")), row, 0);
    subgrid->addWidget(m_audioRecordDeviceCombo, row++, 1, 1, 2);

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Use Gapless Mode"))),
                       row, 0);
    subgrid->addWidget(gaplessMode, row++, 1, 1, 1);

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Resample On Load"))),
                       row, 0);
    subgrid->addWidget(resampleOnLoad, row++, 1, 1, 1);

    subgrid->setRowStretch(row, 10);
    
    m_tabOrdering[AudioIOTab] = m_tabs->count();
    m_tabs->addTab(frame, tr("A&udio I/O"));

    // Plugins tab

    m_pluginPathConfigurator = new PluginPathConfigurator(this);
    m_pluginPathConfigurator->setPaths(PluginPathSetter::getPaths());
    connect(m_pluginPathConfigurator, SIGNAL(pathsChanged()),
            this, SLOT(pluginPathsChanged()));
    
    m_tabOrdering[PluginTab] = m_tabs->count();
    m_tabs->addTab(m_pluginPathConfigurator, tr("&Plugins"));
    
    // General tab

    frame = new QFrame;
    subgrid = new QGridLayout;
    frame->setLayout(subgrid);
    row = 0;

    subgrid->addWidget(new QLabel(tr("%1:").arg(tr("User interface language"))),
                       row, 0);
    subgrid->addWidget(locale, row++, 1, 1, 1);

    subgrid->addWidget(new QLabel(tr("%1:").arg(tr("Allow network usage"))),
                       row, 0);
    subgrid->addWidget(networkPermish, row++, 1, 1, 1);

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Show Splash Screen"))),
                       row, 0);
    subgrid->addWidget(showSplash, row++, 1, 1, 1);

    subgrid->addWidget(new QLabel(tr("%1:").arg(prefs->getPropertyLabel
                                                ("Temporary Directory Root"))),
                       row, 0);
    subgrid->addWidget(m_tempDirRootEdit, row, 1, 1, 1);
    subgrid->addWidget(tempDirButton, row, 2, 1, 1);
    row++;
    
    subgrid->setRowStretch(row, 10);
    
    m_tabOrdering[GeneralTab] = m_tabs->count();
    m_tabs->addTab(frame, tr("&Other"));

    QDialogButtonBox *bb = new QDialogButtonBox(Qt::Horizontal);
    grid->addWidget(bb, 1, 0);
    
    QPushButton *ok = new QPushButton(tr("OK"));
    QPushButton *cancel = new QPushButton(tr("Cancel"));
    bb->addButton(ok, QDialogButtonBox::AcceptRole);
    bb->addButton(m_applyButton, QDialogButtonBox::ApplyRole);
    bb->addButton(cancel, QDialogButtonBox::RejectRole);
    connect(ok, SIGNAL(clicked()), this, SLOT(okClicked()));
    connect(m_applyButton, SIGNAL(clicked()), this, SLOT(applyClicked()));
    connect(cancel, SIGNAL(clicked()), this, SLOT(cancelClicked()));

    m_applyButton->setEnabled(false);
}

PreferencesDialog::~PreferencesDialog()
{
    SVDEBUG << "PreferencesDialog::~PreferencesDialog()" << endl;
}

void
PreferencesDialog::rebuildDeviceCombos()
{
    QSettings settings;
    settings.beginGroup("Preferences");

    vector<string> names = breakfastquay::AudioFactory::getImplementationNames();
    string implementationName;
    
    if (in_range_for(names, m_audioImplementation-1)) {
        implementationName = names[m_audioImplementation-1];
    }

    QString suffix;
    if (implementationName != "") {
        suffix = "-" + QString(implementationName.c_str());
    }
    
    names = breakfastquay::AudioFactory::getPlaybackDeviceNames(implementationName);
    QString playbackDeviceName = settings.value
        ("audio-playback-device" + suffix, "").toString();
    m_audioPlaybackDeviceCombo->clear();
    m_audioPlaybackDeviceCombo->addItem(tr("(auto)"));
    m_audioPlaybackDeviceCombo->setCurrentIndex(0);
    m_audioPlaybackDevice = 0;
    for (int i = 0; in_range_for(names, i); ++i) {
        m_audioPlaybackDeviceCombo->addItem(names[i].c_str());
        if (playbackDeviceName.toStdString() == names[i]) {
            m_audioPlaybackDeviceCombo->setCurrentIndex(i+1);
            m_audioPlaybackDevice = i+1;
        }
    }
    
    names = breakfastquay::AudioFactory::getRecordDeviceNames(implementationName);
    QString recordDeviceName = settings.value
        ("audio-record-device" + suffix, "").toString();
    m_audioRecordDeviceCombo->clear();
    m_audioRecordDeviceCombo->addItem(tr("(auto)"));
    m_audioRecordDeviceCombo->setCurrentIndex(0);
    m_audioRecordDevice = 0;
    for (int i = 0; in_range_for(names, i); ++i) {
        m_audioRecordDeviceCombo->addItem(names[i].c_str());
        if (recordDeviceName.toStdString() == names[i]) {
            m_audioRecordDeviceCombo->setCurrentIndex(i+1);
            m_audioRecordDevice = i+1;
        }
    }

    settings.endGroup();
}

void
PreferencesDialog::switchToTab(Tab t)
{
    if (m_tabOrdering.contains(t)) {
        m_tabs->setCurrentIndex(m_tabOrdering[t]);
    }
}

void
PreferencesDialog::windowTypeChanged(WindowType type)
{
    m_windowType = type;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::spectrogramSmoothingChanged(int smoothing)
{
    m_spectrogramSmoothing = smoothing;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::spectrogramXSmoothingChanged(int smoothing)
{
    m_spectrogramXSmoothing = smoothing;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::spectrogramGColourChanged(int colour)
{
    m_spectrogramGColour = colour;
    m_coloursChanged = true;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::spectrogramMColourChanged(int colour)
{
    m_spectrogramMColour = colour;
    m_coloursChanged = true;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::colour3DColourChanged(int colour)
{
    m_colour3DColour = colour;
    m_coloursChanged = true;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::overviewColourChanged(int colour)
{
    m_overviewColour = ColourDatabase::getInstance()->getColour(colour);
    m_coloursChanged = true;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::propertyLayoutChanged(int layout)
{
    m_propertyLayout = layout;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::tuningFrequencyChanged(double freq)
{
    m_tuningFrequency = freq;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::audioImplementationChanged(int s)
{
    if (m_audioImplementation != s) {
        m_audioImplementation = s;
        rebuildDeviceCombos();
        m_applyButton->setEnabled(true);
        m_audioDeviceChanged = true;
    }
}

void
PreferencesDialog::audioPlaybackDeviceChanged(int s)
{
    if (m_audioPlaybackDevice != s) {
        m_audioPlaybackDevice = s;
        m_applyButton->setEnabled(true);
        m_audioDeviceChanged = true;
    }
}

void
PreferencesDialog::audioRecordDeviceChanged(int s)
{
    if (m_audioRecordDevice != s) {
        m_audioRecordDevice = s;
        m_applyButton->setEnabled(true);
        m_audioDeviceChanged = true;
    }
}

void
PreferencesDialog::resampleOnLoadChanged(int state)
{
    m_resampleOnLoad = (state == Qt::Checked);
    m_applyButton->setEnabled(true);
    m_changesOnRestart = true;
}

void
PreferencesDialog::gaplessModeChanged(int state)
{
    m_gapless = (state == Qt::Checked);
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::vampProcessSeparationChanged(int state)
{
    m_runPluginsInProcess = (state == Qt::Unchecked);
    m_applyButton->setEnabled(true);
    m_changesOnRestart = true;
}

void
PreferencesDialog::networkPermissionChanged(int state)
{
    m_networkPermission = (state == Qt::Checked);
    m_applyButton->setEnabled(true);
    m_changesOnRestart = true;
}

void
PreferencesDialog::retinaChanged(int state)
{
    m_retina = (state == Qt::Checked);
    m_applyButton->setEnabled(true);
    // Does not require a restart
}

void
PreferencesDialog::showSplashChanged(int state)
{
    m_showSplash = (state == Qt::Checked);
    m_applyButton->setEnabled(true);
    m_changesOnRestart = true;
}

void
PreferencesDialog::defaultTemplateChanged(int i)
{
    m_currentTemplate = m_templates[i];
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::localeChanged(int i)
{
    m_currentLocale = m_locales[i];
    m_applyButton->setEnabled(true);
    m_changesOnRestart = true;
}

void
PreferencesDialog::tempDirRootChanged(QString r)
{
    m_tempDirRoot = r;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::tempDirButtonClicked()
{
    QString dir = QFileDialog::getExistingDirectory
        (this, tr("Select a directory to create cache subdirectory in"),
         m_tempDirRoot);
    if (dir == "") return;
    m_tempDirRootEdit->setText(dir);
    tempDirRootChanged(dir);
    m_changesOnRestart = true;
}

void
PreferencesDialog::backgroundModeChanged(int mode)
{
    m_backgroundMode = mode;
    m_applyButton->setEnabled(true);
    m_changesOnRestart = true;
}

void
PreferencesDialog::timeToTextModeChanged(int mode)
{
    m_timeToTextMode = mode;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::showHMSChanged(int state)
{
    m_showHMS = (state == Qt::Checked);
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::octaveSystemChanged(int system)
{
    m_octaveSystem = system;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::viewFontSizeChanged(int sz)
{
    m_viewFontSize = sz;
    m_applyButton->setEnabled(true);
}

void
PreferencesDialog::pluginPathsChanged()
{
    m_applyButton->setEnabled(true);
    m_changesOnRestart = true;
}

void
PreferencesDialog::okClicked()
{
    applyClicked();
    accept();
}

void
PreferencesDialog::applyClicked()
{
    Preferences *prefs = Preferences::getInstance();
    prefs->setWindowType(WindowType(m_windowType));
    prefs->setSpectrogramSmoothing(Preferences::SpectrogramSmoothing
                                   (m_spectrogramSmoothing));
    prefs->setSpectrogramXSmoothing(Preferences::SpectrogramXSmoothing
                                   (m_spectrogramXSmoothing));
    prefs->setPropertyBoxLayout(Preferences::PropertyBoxLayout
                                (m_propertyLayout));
    prefs->setTuningFrequency(m_tuningFrequency);
    prefs->setResampleOnLoad(m_resampleOnLoad);
    prefs->setUseGaplessMode(m_gapless);
    prefs->setRunPluginsInProcess(m_runPluginsInProcess);
    prefs->setShowSplash(m_showSplash);
    prefs->setTemporaryDirectoryRoot(m_tempDirRoot);
    prefs->setBackgroundMode(Preferences::BackgroundMode(m_backgroundMode));
    prefs->setTimeToTextMode(Preferences::TimeToTextMode(m_timeToTextMode));
    prefs->setShowHMS(m_showHMS);
    prefs->setViewFontSize(m_viewFontSize);
    
    prefs->setProperty("Octave Numbering System", m_octaveSystem);

    QSettings settings;
    settings.beginGroup("Preferences");
    QString permishTag = QString("network-permission-%1").arg(SV_VERSION);
    settings.setValue(permishTag, m_networkPermission);

    vector<string> names = breakfastquay::AudioFactory::getImplementationNames();
    string implementationName;
    if (m_audioImplementation > int(names.size())) {
        m_audioImplementation = 0;
    }
    if (m_audioImplementation > 0) {
        implementationName = names[m_audioImplementation-1];
    }
    settings.setValue("audio-target", implementationName.c_str());

    QString suffix;
    if (implementationName != "") {
        suffix = "-" + QString(implementationName.c_str());
    }
    
    names = breakfastquay::AudioFactory::getPlaybackDeviceNames(implementationName);
    string deviceName;
    if (m_audioPlaybackDevice > int(names.size())) {
        m_audioPlaybackDevice = 0;
    }
    if (m_audioPlaybackDevice > 0) {
        deviceName = names[m_audioPlaybackDevice-1];
    }
    settings.setValue("audio-playback-device" + suffix, deviceName.c_str());

    names = breakfastquay::AudioFactory::getRecordDeviceNames(implementationName);
    deviceName = "";
    if (m_audioRecordDevice > int(names.size())) {
        m_audioRecordDevice = 0;
    }
    if (m_audioRecordDevice > 0) {
        deviceName = names[m_audioRecordDevice-1];
    }
    settings.setValue("audio-record-device" + suffix, deviceName.c_str());
    
    settings.setValue("locale", m_currentLocale);
#ifdef Q_OS_MAC
    settings.setValue("scaledHiDpi", m_retina);
#endif
    settings.setValue("spectrogram-colour", m_spectrogramGColour);
    settings.setValue("spectrogram-melodic-colour", m_spectrogramMColour);
    settings.setValue("colour-3d-plot-colour", m_colour3DColour);
    settings.setValue("overview-colour", m_overviewColour.name());
    settings.endGroup();

    settings.beginGroup("MainWindow");
    settings.setValue("sessiontemplate", m_currentTemplate);
    settings.endGroup();

    m_applyButton->setEnabled(false);

    if (m_changesOnRestart) {
        QMessageBox::information(this, tr("Preferences"),
                                 tr("<b>Restart required</b><p>One or more of the application preferences you have changed may not take full effect until Sonic Visualiser is restarted.</p><p>Please exit and restart the application now if you want these changes to take effect immediately.</p>"));
        m_changesOnRestart = false;
    }

    if (m_audioDeviceChanged) {
        emit audioDeviceChanged();
        m_audioDeviceChanged = false;
    }

    if (m_coloursChanged) {
        emit coloursChanged();
        m_coloursChanged = false;
    }

    PluginPathSetter::savePathSettings(m_pluginPathConfigurator->getPaths());
}    

void
PreferencesDialog::cancelClicked()
{
    reject();
}

void
PreferencesDialog::applicationClosing(bool quickly)
{
    if (quickly) {
        reject();
        return;
    }

    if (m_applyButton->isEnabled()) {
        int rv = QMessageBox::warning
            (this, tr("Preferences Changed"),
             tr("Some preferences have been changed but not applied.\n"
                "Apply them before closing?"),
             QMessageBox::Apply | QMessageBox::Discard,
             QMessageBox::Discard);
        if (rv == QMessageBox::Apply) {
            applyClicked();
            accept();
        } else {
            reject();
        }
    } else {
        accept();
    }
}