Qt中定义宏实现增加菜单

有类似增加菜单的程序，看上去有很多重复类似的代码,

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QMenu *editMenu = menuBar()->addMenu(tr("Edit"));
    QMenu *newObjectMenu = editMenu->addMenu(tr("New Object"));

QAction *newRectangleAction = new QAction(tr("Rectangle"), this);
    connect(newRectangleAction, SIGNAL(triggered(bool)), this, SLOT(newRectangle()));
    newObjectMenu->addAction(newRectangleAction);

QAction *newLineAction = new QAction(tr("Line"), this);
    connect(newLineAction, SIGNAL(triggered(bool)), this, SLOT(newLine()));
    newObjectMenu->addAction(newLineAction);

   

QAction *newEllipseAction = new QAction(tr("Ellipse"), this);
    connect(newEllipseAction, SIGNAL(triggered(bool)), this, SLOT(newEllipse()));
    newObjectMenu->addAction(newEllipseAction

 

QAction *newTextAction = new QAction(tr("Text"), this);
    connect(newTextAction, SIGNAL(triggered(bool)), this, SLOT(newText()));
    newObjectMenu->addAction(newTextAction);*/

...........................

}

 

下面定义宏来实现上面的功能,更有利于维护

#define ADD_MENU_ACTION(AAA, menuObj, actObj, menuName, menuAct) \
 QAction *newAct##AAA = new QAction(menuName, actObj); \
 connect(newAct##AAA , SIGNAL(triggered(bool)), actObj, SLOT(menuAct)); \
 menuObj->addAction(newAct##AAA);

 

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QMenu *editMenu = menuBar()->addMenu(tr("Edit"));
    QMenu *newObjectMenu = editMenu->addMenu(tr("New Object"));

 

  ADD_MENU_ACTION(1, newObjectMenu, this, tr("Rectangle"), newRectangle());
  ADD_MENU_ACTION(2, newObjectMenu, this, tr("Line"), newLine());
  ADD_MENU_ACTION(3, newObjectMenu, this, tr("Ellipse"), newEllipse());
  ADD_MENU_ACTION(4, newObjectMenu, this, tr("Text"), newText());
 
 ...........................
 
 }