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** This file is part of the demonstration applications of the Qt Toolkit.

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****************************************************************************/

#include "mainwindow.h"

#include "colorswatch.h"

#include "toolbar.h"

#include <QAction>

#include <QLayout>

#include <QMenu>

#include <QMenuBar>

#include <QStatusBar>

#include <QTextEdit>

#include <QFile>

#include <QDataStream>

#include <QFileDialog>

#include <QMessageBox>

#include <QSignalMapper>

#include <QApplication>

#include <QPainter>

#include <QMouseEvent>

#include <QLineEdit>

#include <QComboBox>

#include <QLabel>

#include <QPushButton>

#include <qdebug.h>

static const char * const message =

    "<p><b>Qt Main Window Demo</b></p>"

    "<p>This is a demonstration of the QMainWindow, QToolBar and "

    "QDockWidget classes.</p>"

    "<p>The tool bar and dock widgets can be dragged around and rearranged "

    "using the mouse or via the menu.</p>"

    "<p>Each dock widget contains a colored frame and a context "

    "(right-click) menu.</p>"

#ifdef Q_WS_MAC

    "<p>On Mac OS X, the \"Black\" dock widget has been created as a "

    "<em>Drawer</em>, which is a special kind of QDockWidget.</p>"

#endif

    ;

MainWindow::MainWindow(const QMap<QString, QSize> &customSizeHints,

                        QWidget *parent, Qt::WindowFlags flags)

    : QMainWindow(parent, flags)

{

    setObjectName("MainWindow");

    setWindowTitle("Qt Main Window Demo");

    center = new QTextEdit(this);

    center->setReadOnly(true);

    center->setMinimumSize(400, 205);

    setCentralWidget(center);

    setupToolBar();

    setupMenuBar();

    setupDockWidgets(customSizeHints);

    statusBar()->showMessage(tr("Status Bar"));

}

void MainWindow::actionTriggered(QAction *action)

{

    qDebug("action '%s' triggered", action->text().toLocal8Bit().data());

}

void MainWindow::setupToolBar()

{

    for (int i = 0; i < 3; ++i) {

        ToolBar *tb = new ToolBar(QString::fromLatin1("Tool Bar %1").arg(i + 1), this);

        toolBars.append(tb);

        addToolBar(tb);

    }

}

void MainWindow::setupMenuBar()

{

    QMenu *menu = menuBar()->addMenu(tr("&File"));

    QAction *action = menu->addAction(tr("Save layout..."));

    connect(action, SIGNAL(triggered()), this, SLOT(saveLayout()));

    action = menu->addAction(tr("Load layout..."));

    connect(action, SIGNAL(triggered()), this, SLOT(loadLayout()));

    action = menu->addAction(tr("Switch layout direction"));

    connect(action, SIGNAL(triggered()), this, SLOT(switchLayoutDirection()));

    menu->addSeparator();

    menu->addAction(tr("&Quit"), this, SLOT(close()));

    mainWindowMenu = menuBar()->addMenu(tr("Main window"));

    action = mainWindowMenu->addAction(tr("Animated docks"));

    action->setCheckable(true);

    action->setChecked(dockOptions() & AnimatedDocks);

    connect(action, SIGNAL(toggled(bool)), this, SLOT(setDockOptions()));

    action = mainWindowMenu->addAction(tr("Allow nested docks"));

    action->setCheckable(true);

    action->setChecked(dockOptions() & AllowNestedDocks);

    connect(action, SIGNAL(toggled(bool)), this, SLOT(setDockOptions()));

    action = mainWindowMenu->addAction(tr("Allow tabbed docks"));

    action->setCheckable(true);

    action->setChecked(dockOptions() & AllowTabbedDocks);

    connect(action, SIGNAL(toggled(bool)), this, SLOT(setDockOptions()));

    action = mainWindowMenu->addAction(tr("Force tabbed docks"));

    action->setCheckable(true);

    action->setChecked(dockOptions() & ForceTabbedDocks);

    connect(action, SIGNAL(toggled(bool)), this, SLOT(setDockOptions()));

    action = mainWindowMenu->addAction(tr("Vertical tabs"));

    action->setCheckable(true);

    action->setChecked(dockOptions() & VerticalTabs);

    connect(action, SIGNAL(toggled(bool)), this, SLOT(setDockOptions()));

    QMenu *toolBarMenu = menuBar()->addMenu(tr("Tool bars"));

    for (int i = 0; i < toolBars.count(); ++i)

        toolBarMenu->addMenu(toolBars.at(i)->menu);

    dockWidgetMenu = menuBar()->addMenu(tr("&Dock Widgets"));

}

void MainWindow::setDockOptions()

{

    DockOptions opts;

    QList<QAction*> actions = mainWindowMenu->actions();

    if (actions.at(0)->isChecked())

        opts |= AnimatedDocks;

    if (actions.at(1)->isChecked())

        opts |= AllowNestedDocks;

    if (actions.at(2)->isChecked())

        opts |= AllowTabbedDocks;

    if (actions.at(3)->isChecked())

        opts |= ForceTabbedDocks;

    if (actions.at(4)->isChecked())

        opts |= VerticalTabs;

    QMainWindow::setDockOptions(opts);

}

void MainWindow::saveLayout()

{

    QString fileName

        = QFileDialog::getSaveFileName(this, tr("Save layout"));

    if (fileName.isEmpty())

        return;

    QFile file(fileName);

    if (!file.open(QFile::WriteOnly)) {

        QString msg = tr("Failed to open %1\n%2")

                        .arg(fileName)

                        .arg(file.errorString());

        QMessageBox::warning(this, tr("Error"), msg);

        return;

    }

    QByteArray geo_data = saveGeometry();

    QByteArray layout_data = saveState();

    bool ok = file.putChar((uchar)geo_data.size());

    if (ok)

        ok = file.write(geo_data) == geo_data.size();

    if (ok)

        ok = file.write(layout_data) == layout_data.size();

    if (!ok) {

        QString msg = tr("Error writing to %1\n%2")

                        .arg(fileName)

                        .arg(file.errorString());

        QMessageBox::warning(this, tr("Error"), msg);

        return;

    }

}

void MainWindow::loadLayout()

{

    QString fileName

        = QFileDialog::getOpenFileName(this, tr("Load layout"));

    if (fileName.isEmpty())

        return;

    QFile file(fileName);

    if (!file.open(QFile::ReadOnly)) {

        QString msg = tr("Failed to open %1\n%2")

                        .arg(fileName)

                        .arg(file.errorString());

        QMessageBox::warning(this, tr("Error"), msg);

        return;

    }

    uchar geo_size;

    QByteArray geo_data;

    QByteArray layout_data;

    bool ok = file.getChar((char*)&geo_size);

    if (ok) {

        geo_data = file.read(geo_size);

        ok = geo_data.size() == geo_size;

    }

    if (ok) {

        layout_data = file.readAll();

        ok = layout_data.size() > 0;

    }

    if (ok)

        ok = restoreGeometry(geo_data);

    if (ok)

        ok = restoreState(layout_data);

    if (!ok) {

        QString msg = tr("Error reading %1")

                        .arg(fileName);

        QMessageBox::warning(this, tr("Error"), msg);

        return;

    }

}

QAction *addAction(QMenu *menu, const QString &text, QActionGroup *group, QSignalMapper *mapper,

                    int id)

{

    bool first = group->actions().isEmpty();

    QAction *result = menu->addAction(text);

    result->setCheckable(true);

    result->setChecked(first);

    group->addAction(result);

    QObject::connect(result, SIGNAL(triggered()), mapper, SLOT(map()));

    mapper->setMapping(result, id);

    return result;

}

void MainWindow::setupDockWidgets(const QMap<QString, QSize> &customSizeHints)

{

    mapper = new QSignalMapper(this);

    connect(mapper, SIGNAL(mapped(int)), this, SLOT(setCorner(int)));

    QMenu *corner_menu = dockWidgetMenu->addMenu(tr("Top left corner"));

    QActionGroup *group = new QActionGroup(this);

    group->setExclusive(true);

    ::addAction(corner_menu, tr("Top dock area"), group, mapper, 0);

    ::addAction(corner_menu, tr("Left dock area"), group, mapper, 1);

    corner_menu = dockWidgetMenu->addMenu(tr("Top right corner"));

    group = new QActionGroup(this);

    group->setExclusive(true);

    ::addAction(corner_menu, tr("Top dock area"), group, mapper, 2);

    ::addAction(corner_menu, tr("Right dock area"), group, mapper, 3);

    corner_menu = dockWidgetMenu->addMenu(tr("Bottom left corner"));

    group = new QActionGroup(this);

    group->setExclusive(true);

    ::addAction(corner_menu, tr("Bottom dock area"), group, mapper, 4);

    ::addAction(corner_menu, tr("Left dock area"), group, mapper, 5);

    corner_menu = dockWidgetMenu->addMenu(tr("Bottom right corner"));

    group = new QActionGroup(this);

    group->setExclusive(true);

    ::addAction(corner_menu, tr("Bottom dock area"), group, mapper, 6);

    ::addAction(corner_menu, tr("Right dock area"), group, mapper, 7);

    dockWidgetMenu->addSeparator();

    static const struct Set {

        const char * name;

        uint flags;

        Qt::DockWidgetArea area;

    } sets [] = {

#ifndef Q_WS_MAC

        { "Black", 0, Qt::LeftDockWidgetArea },

#else

        { "Black", Qt::Drawer, Qt::LeftDockWidgetArea },

#endif

        { "White", 0, Qt::RightDockWidgetArea },

        { "Red", 0, Qt::TopDockWidgetArea },

        { "Green", 0, Qt::TopDockWidgetArea },

        { "Blue", 0, Qt::BottomDockWidgetArea },

        { "Yellow", 0, Qt::BottomDockWidgetArea }

    };

    const int setCount = sizeof(sets) / sizeof(Set);

    for (int i = 0; i < setCount; ++i) {

        ColorSwatch *swatch = new ColorSwatch(tr(sets[i].name), this, Qt::WindowFlags(sets[i].flags));

        if (i%2)

            swatch->setWindowIcon(QIcon(QPixmap(":/res/qt.png")));

        if (qstrcmp(sets[i].name, "Blue") == 0) {

            BlueTitleBar *titlebar = new BlueTitleBar(swatch);

            swatch->setTitleBarWidget(titlebar);

            connect(swatch, SIGNAL(topLevelChanged(bool)), titlebar, SLOT(updateMask()));

            connect(swatch, SIGNAL(featuresChanged(QDockWidget::DockWidgetFeatures)), titlebar, SLOT(updateMask()));

#ifdef Q_WS_QWS

            QPalette pal = palette();

            pal.setBrush(backgroundRole(), QColor(0,0,0,0));

            swatch->setPalette(pal);

#endif

        }

        QString name = QString::fromLatin1(sets[i].name);

        if (customSizeHints.contains(name))

            swatch->setCustomSizeHint(customSizeHints.value(name));

        addDockWidget(sets[i].area, swatch);

        dockWidgetMenu->addMenu(swatch->menu);

    }

    createDockWidgetAction = new QAction(tr("Add dock widget..."), this);

    connect(createDockWidgetAction, SIGNAL(triggered()), this, SLOT(createDockWidget()));

    destroyDockWidgetMenu = new QMenu(tr("Destroy dock widget"), this);

    destroyDockWidgetMenu->setEnabled(false);

    connect(destroyDockWidgetMenu, SIGNAL(triggered(QAction*)), this, SLOT(destroyDockWidget(QAction*)));

    dockWidgetMenu->addSeparator();

    dockWidgetMenu->addAction(createDockWidgetAction);

    dockWidgetMenu->addMenu(destroyDockWidgetMenu);

}

void MainWindow::setCorner(int id)

{

    switch (id) {

        case 0:

            QMainWindow::setCorner(Qt::TopLeftCorner, Qt::TopDockWidgetArea);

            break;

        case 1:

            QMainWindow::setCorner(Qt::TopLeftCorner, Qt::LeftDockWidgetArea);

            break;

        case 2:

            QMainWindow::setCorner(Qt::TopRightCorner, Qt::TopDockWidgetArea);

            break;

        case 3:

            QMainWindow::setCorner(Qt::TopRightCorner, Qt::RightDockWidgetArea);

            break;

        case 4:

            QMainWindow::setCorner(Qt::BottomLeftCorner, Qt::BottomDockWidgetArea);

            break;

        case 5:

            QMainWindow::setCorner(Qt::BottomLeftCorner, Qt::LeftDockWidgetArea);

            break;

        case 6:

            QMainWindow::setCorner(Qt::BottomRightCorner, Qt::BottomDockWidgetArea);

            break;

        case 7:

            QMainWindow::setCorner(Qt::BottomRightCorner, Qt::RightDockWidgetArea);

            break;

    }

}

void MainWindow::showEvent(QShowEvent *event)

{

    QMainWindow::showEvent(event);

}

void MainWindow::switchLayoutDirection()

{

    if (layoutDirection() == Qt::LeftToRight)

        qApp->setLayoutDirection(Qt::RightToLeft);

    else

        qApp->setLayoutDirection(Qt::LeftToRight);

}

class CreateDockWidgetDialog : public QDialog

{

public:

    CreateDockWidgetDialog(QWidget *parent = 0);

    QString objectName() const;

    Qt::DockWidgetArea location() const;

private:

    QLineEdit *m_objectName;

    QComboBox *m_location;

};

CreateDockWidgetDialog::CreateDockWidgetDialog(QWidget *parent)

    : QDialog(parent)

{

    QGridLayout *layout = new QGridLayout(this);

    layout->addWidget(new QLabel(tr("Object name:")), 0, 0);

    m_objectName = new QLineEdit;

    layout->addWidget(m_objectName, 0, 1);

    layout->addWidget(new QLabel(tr("Location:")), 1, 0);

    m_location = new QComboBox;

    m_location->setEditable(false);

    m_location->addItem(tr("Top"));

    m_location->addItem(tr("Left"));

    m_location->addItem(tr("Right"));

    m_location->addItem(tr("Bottom"));

    m_location->addItem(tr("Restore"));

    layout->addWidget(m_location, 1, 1);

    QHBoxLayout *buttonLayout = new QHBoxLayout;

    layout->addLayout(buttonLayout, 2, 0, 1, 2);

    buttonLayout->addStretch();

    QPushButton *cancelButton = new QPushButton(tr("Cancel"));

    connect(cancelButton, SIGNAL(clicked()), this, SLOT(reject()));

    buttonLayout->addWidget(cancelButton);

    QPushButton *okButton = new QPushButton(tr("Ok"));

    connect(okButton, SIGNAL(clicked()), this, SLOT(accept()));

    buttonLayout->addWidget(okButton);

    okButton->setDefault(true);

}

QString CreateDockWidgetDialog::objectName() const

{

    return m_objectName->text();

}

Qt::DockWidgetArea CreateDockWidgetDialog::location() const

{

    switch (m_location->currentIndex()) {

        case 0: return Qt::TopDockWidgetArea;

        case 1: return Qt::LeftDockWidgetArea;

        case 2: return Qt::RightDockWidgetArea;

        case 3: return Qt::BottomDockWidgetArea;

        default:

            break;

    }

    return Qt::NoDockWidgetArea;

}

void MainWindow::createDockWidget()

{

    CreateDockWidgetDialog dialog(this);

    int ret = dialog.exec();

    if (ret == QDialog::Rejected)

        return;

    QDockWidget *dw = new QDockWidget;

    dw->setObjectName(dialog.objectName());

    dw->setWindowTitle(dialog.objectName());

    dw->setWidget(new QTextEdit);

    Qt::DockWidgetArea area = dialog.location();

    switch (area) {

        case Qt::LeftDockWidgetArea:

        case Qt::RightDockWidgetArea:

        case Qt::TopDockWidgetArea:

        case Qt::BottomDockWidgetArea:

            addDockWidget(area, dw);

            break;

        default:

            if (!restoreDockWidget(dw)) {

                QMessageBox::warning(this, QString(), tr("Failed to restore dock widget"));

                delete dw;

                return;

            }

            break;

    }

    extraDockWidgets.append(dw);

    destroyDockWidgetMenu->setEnabled(true);

    destroyDockWidgetMenu->addAction(new QAction(dialog.objectName(), this));

}

void MainWindow::destroyDockWidget(QAction *action)

{

    int index = destroyDockWidgetMenu->actions().indexOf(action);

    delete extraDockWidgets.takeAt(index);

    destroyDockWidgetMenu->removeAction(action);

    action->deleteLater();

    if (destroyDockWidgetMenu->isEmpty())

        destroyDockWidgetMenu->setEnabled(false);

}