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mainwindow.h Example File
demos/mainwindow/mainwindow.h

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 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H

 #include <QMainWindow>
 #include <QTextEdit>

 class ToolBar;
 QT_FORWARD_DECLARE_CLASS(QMenu)
 QT_FORWARD_DECLARE_CLASS(QSignalMapper)

 class MainWindow : public QMainWindow
 {
     Q_OBJECT

     QTextEdit *center;
     QList<ToolBar*> toolBars;
     QMenu *dockWidgetMenu;
     QMenu *mainWindowMenu;
     QSignalMapper *mapper;
     QList<QDockWidget*> extraDockWidgets;
     QAction *createDockWidgetAction;
     QMenu *destroyDockWidgetMenu;

 public:
     MainWindow(const QMap<QString, QSize> &customSizeHints,
                 QWidget *parent = 0, Qt::WindowFlags flags = 0);

 protected:
     void showEvent(QShowEvent *event);

 public slots:
     void actionTriggered(QAction *action);
     void saveLayout();
     void loadLayout();
     void setCorner(int id);
     void switchLayoutDirection();
     void setDockOptions();

     void createDockWidget();
     void destroyDockWidget(QAction *action);

 private:
     void setupToolBar();
     void setupMenuBar();
     void setupDockWidgets(const QMap<QString, QSize> &customSizeHints);
 };

 #endif