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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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        #include "mainwindow.h"

        #include "colorswatch.h"
        #include "toolbar.h"

        #include <qaction.h>
        #include <qlayout.h>
        #include <qmenu.h>
        #include <qmenubar.h>
        #include <qstatusbar.h>
        #include <qtextedit.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(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));
                addDockWidget(sets[i].area, swatch);
                dockWidgetMenu->addMenu(swatch->menu);
            }
        }