mainwindow.h Example File

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  #ifndef MAINWINDOW_H
  #define MAINWINDOW_H

  #include "diagramitem.h"

  #include <QMainWindow>

  class DiagramScene;

  class QAction;
  class QToolBox;
  class QSpinBox;
  class QComboBox;
  class QFontComboBox;
  class QButtonGroup;
  class QLineEdit;
  class QGraphicsTextItem;
  class QFont;
  class QToolButton;
  class QAbstractButton;
  class QGraphicsView;

  class MainWindow : public QMainWindow
  {
      Q_OBJECT

  public:
     MainWindow();

  private slots:
      void backgroundButtonGroupClicked(QAbstractButton *button);
      void buttonGroupClicked(int id);
      void deleteItem();
      void pointerGroupClicked(int id);
      void bringToFront();
      void sendToBack();
      void itemInserted(DiagramItem *item);
      void textInserted(QGraphicsTextItem *item);
      void currentFontChanged(const QFont &font);
      void fontSizeChanged(const QString &size);
      void sceneScaleChanged(const QString &scale);
      void textColorChanged();
      void itemColorChanged();
      void lineColorChanged();
      void textButtonTriggered();
      void fillButtonTriggered();
      void lineButtonTriggered();
      void handleFontChange();
      void itemSelected(QGraphicsItem *item);
      void about();

  private:
      void createToolBox();
      void createActions();
      void createMenus();
      void createToolbars();
      QWidget *createBackgroundCellWidget(const QString &text,
                                          const QString &image);
      QWidget *createCellWidget(const QString &text,
                                DiagramItem::DiagramType type);
      QMenu *createColorMenu(const char *slot, QColor defaultColor);
      QIcon createColorToolButtonIcon(const QString &image, QColor color);
      QIcon createColorIcon(QColor color);

      DiagramScene *scene;
      QGraphicsView *view;

      QAction *exitAction;
      QAction *addAction;
      QAction *deleteAction;

      QAction *toFrontAction;
      QAction *sendBackAction;
      QAction *aboutAction;

      QMenu *fileMenu;
      QMenu *itemMenu;
      QMenu *aboutMenu;

      QToolBar *textToolBar;
      QToolBar *editToolBar;
      QToolBar *colorToolBar;
      QToolBar *pointerToolbar;

      QComboBox *sceneScaleCombo;
      QComboBox *itemColorCombo;
      QComboBox *textColorCombo;
      QComboBox *fontSizeCombo;
      QFontComboBox *fontCombo;

      QToolBox *toolBox;
      QButtonGroup *buttonGroup;
      QButtonGroup *pointerTypeGroup;
      QButtonGroup *backgroundButtonGroup;
      QToolButton *fontColorToolButton;
      QToolButton *fillColorToolButton;
      QToolButton *lineColorToolButton;
      QAction *boldAction;
      QAction *underlineAction;
      QAction *italicAction;
      QAction *textAction;
      QAction *fillAction;
      QAction *lineAction;
  };

  #endif // MAINWINDOW_H