mainwindow.h Example File

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  #ifndef MAINWINDOW_H
  #define MAINWINDOW_H

  #include <QMainWindow>

  class QAction;
  class QActionGroup;
  class QLabel;
  class QMenu;

  class MainWindow : public QMainWindow
  {
      Q_OBJECT

  public:
      MainWindow();

  protected:
  #ifndef QT_NO_CONTEXTMENU
      void contextMenuEvent(QContextMenuEvent *event) override;
  #endif // QT_NO_CONTEXTMENU

  private slots:
      void newFile();
      void open();
      void save();
      void print();
      void undo();
      void redo();
      void cut();
      void copy();
      void paste();
      void bold();
      void italic();
      void leftAlign();
      void rightAlign();
      void justify();
      void center();
      void setLineSpacing();
      void setParagraphSpacing();
      void about();
      void aboutQt();

  private:
      void createActions();
      void createMenus();

      QMenu *fileMenu;
      QMenu *editMenu;
      QMenu *formatMenu;
      QMenu *helpMenu;
      QActionGroup *alignmentGroup;
      QAction *newAct;
      QAction *openAct;
      QAction *saveAct;
      QAction *printAct;
      QAction *exitAct;
      QAction *undoAct;
      QAction *redoAct;
      QAction *cutAct;
      QAction *copyAct;
      QAction *pasteAct;
      QAction *boldAct;
      QAction *italicAct;
      QAction *leftAlignAct;
      QAction *rightAlignAct;
      QAction *justifyAct;
      QAction *centerAct;
      QAction *setLineSpacingAct;
      QAction *setParagraphSpacingAct;
      QAction *aboutAct;
      QAction *aboutQtAct;
      QLabel *infoLabel;
  };

  #endif