如何在 QWidget 窗口上弹出右键菜单

[code]
[code]MyWidget::MyWidget(QWidget*parent)

:QWidget(parent)

{

setWindowTitle(tr("ContextMenuShow1"));

//为窗口添加QActions

addAction(newQAction(tr("&Open"),this));

addAction(newQAction(QIcon(":/images/mark.png"),tr("&Mark"),this));

addAction(newQAction(tr("&Quit"),this));

//设置contextMenuPolicy属性值为'以Actions为弹出菜单的菜单项组成菜单'

setContextMenuPolicy(Qt::ActionsContextMenu);

}

[code]MyWidget::MyWidget(QWidget*parent)

:QWidget(parent)

{

setWindowTitle(tr("ContextMenuShow2"));

setContextMenuPolicy(Qt::DefaultContextMenu);//其实不用设置，默认就是这个值

}

voidMyWidget::contextMenuEvent(QContextMenuEvent*event)

{

QMenu*menu=newQMenu(this);

menu->addAction(newQAction(tr("&Open"),menu));

menu->addAction(newQAction(QIcon(":/images/mark.png"),tr("&Mark"),menu));

menu->addAction(newQAction(tr("&Quit"),menu));

menu->move(cursor().pos());//让菜单显示的位置在鼠标的坐标上

menu->show();

}