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mainwindow.cpp Example File
^{demos/mainwindow/mainwindow.cpp}

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    **
    ** This file is part of the documentation of the Qt Toolkit.
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    ** and appearing in the file LICENSE.GPL included in the packaging of
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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>

    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(QWidget *parent, Qt::WFlags flags)
        : QMainWindow(parent, flags)
    {
        setObjectName("MainWindow");
        setWindowTitle("Qt Main Window Demo");

        setupToolBar();
        setupMenuBar();
        setupDockWidgets();

        QTextEdit *center = new QTextEdit(this);
        center->setReadOnly(true);
        center->setHtml(tr(message));
        center->setMinimumSize(400, 205);
        setCentralWidget(center);

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

    void MainWindow::actionTriggered(QAction *action)
    {
        qDebug("action '%s' triggered", action->text().toLocal8Bit().data());
    }

    void MainWindow::setupToolBar()
    {
        toolbar = new ToolBar(this);
        toolbar->setAllowedAreas(Qt::TopToolBarArea | Qt::BottomToolBarArea);
        addToolBar(toolbar);
    }

    void MainWindow::setupMenuBar()
    {
        QMenu *menu = menuBar()->addMenu(tr("&File"));
        menu->addAction(tr("&Quit"), this, SLOT(close()));

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

    void MainWindow::setupDockWidgets()
    {
        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::WFlags(sets[i].flags));
            if (i%2)
                swatch->setWindowIcon(QIcon(QPixmap(":/res/qt.png")));
            addDockWidget(sets[i].area, swatch);
            dockWidgetMenu->addMenu(swatch->menu);
        }
    }