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mainwindow.h Example File
^{widgets/icons/mainwindow.h}

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    #ifndef MAINWINDOW_H
    #define MAINWINDOW_H

    #include <QIcon>
    #include <QList>
    #include <QMainWindow>
    #include <QPixmap>

    class QAction;
    class QActionGroup;
    class QGroupBox;
    class QMenu;
    class QRadioButton;
    class QTableWidget;
    class IconPreviewArea;
    class IconSizeSpinBox;

    class MainWindow : public QMainWindow
    {
        Q_OBJECT

    public:
        MainWindow();

    private slots:
        void about();
        void changeStyle(bool checked);
        void changeSize();
        void changeIcon();
        void addImage();
        void removeAllImages();

    private:
        void createPreviewGroupBox();
        void createImagesGroupBox();
        void createIconSizeGroupBox();
        void createActions();
        void createMenus();
        void createContextMenu();
        void checkCurrentStyle();

        QWidget *centralWidget;

        QGroupBox *previewGroupBox;
        IconPreviewArea *previewArea;

        QGroupBox *imagesGroupBox;
        QTableWidget *imagesTable;

        QGroupBox *iconSizeGroupBox;
        QRadioButton *smallRadioButton;
        QRadioButton *largeRadioButton;
        QRadioButton *toolBarRadioButton;
        QRadioButton *listViewRadioButton;
        QRadioButton *iconViewRadioButton;
        QRadioButton *otherRadioButton;
        IconSizeSpinBox *otherSpinBox;

        QMenu *fileMenu;
        QMenu *viewMenu;
        QMenu *helpMenu;
        QAction *addImageAct;
        QAction *removeAllImagesAct;
        QAction *exitAct;
        QAction *guessModeStateAct;
        QActionGroup *styleActionGroup;
        QAction *aboutAct;
        QAction *aboutQtAct;
    };

    #endif