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mainwindow.h Example File
^{mainwindows/sdi/mainwindow.h}

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    ** This file is part of the documentation of the Qt Toolkit.
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    #ifndef MAINWINDOW_H
    #define MAINWINDOW_H

    #include <QMainWindow>

    class QAction;
    class QMenu;
    class QTextEdit;

    class MainWindow : public QMainWindow
    {
        Q_OBJECT

    public:
        MainWindow();
        MainWindow(const QString &fileName);

    protected:
        void closeEvent(QCloseEvent *event);

    private slots:
        void newFile();
        void open();
        bool save();
        bool saveAs();
        void about();
        void documentWasModified();

    private:
        void init();
        void createActions();
        void createMenus();
        void createToolBars();
        void createStatusBar();
        void readSettings();
        void writeSettings();
        bool maybeSave();
        void loadFile(const QString &fileName);
        bool saveFile(const QString &fileName);
        void setCurrentFile(const QString &fileName);
        QString strippedName(const QString &fullFileName);
        MainWindow *findMainWindow(const QString &fileName);

        QTextEdit *textEdit;
        QString curFile;
        bool isUntitled;

        QMenu *fileMenu;
        QMenu *editMenu;
        QMenu *helpMenu;
        QToolBar *fileToolBar;
        QToolBar *editToolBar;
        QAction *newAct;
        QAction *openAct;
        QAction *saveAct;
        QAction *saveAsAct;
        QAction *closeAct;
        QAction *exitAct;
        QAction *cutAct;
        QAction *copyAct;
        QAction *pasteAct;
        QAction *aboutAct;
        QAction *aboutQtAct;
    };

    #endif