mainwindow.h Example File

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 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H

 #include <QMainWindow>

 class QAction;
 class QListWidget;
 class QMenu;
 class QTextEdit;

 class MainWindow : public QMainWindow
 {
     Q_OBJECT

 public:
     MainWindow();

 private slots:
     void newLetter();
     void save();
     void print();
     void undo();
     void about();
     void insertCustomer(const QString &customer);
     void addParagraph(const QString &paragraph);

 private:
     void createActions();
     void createMenus();
     void createToolBars();
     void createStatusBar();
     void createDockWindows();

     QTextEdit *textEdit;
     QListWidget *customerList;
     QListWidget *paragraphsList;

     QMenu *fileMenu;
     QMenu *editMenu;
     QMenu *viewMenu;
     QMenu *helpMenu;
     QToolBar *fileToolBar;
     QToolBar *editToolBar;
     QAction *newLetterAct;
     QAction *saveAct;
     QAction *printAct;
     QAction *undoAct;
     QAction *aboutAct;
     QAction *aboutQtAct;
     QAction *quitAct;
 };

 #endif