Qt创建右键菜单的方法

来源：互联网发布：股票下单软件编辑：程序博客网时间：2024/06/02 12:22

编写Qt界面程序的时候，经常会用到右键菜单(ContextMenu)，目前自己知道的创建右键菜单的方法有两种，

方法1：在mousePressEvent事件中判断鼠标按下的是否是右键，进而调用创建右键菜单的函数。

void Dialog::mousePressEvent(QMouseEvent *event)//鼠标按下事件{    if(event->button() == Qt::RightButton)    {        createContextMenu();    }}void Dialog::createContextMenu()//创建右键菜单函数{    QCursor cur=this->cursor();    QMenu *contextMenu = new QMenu(this);    QAction *cutAction = new QAction(tr("&New"), this);    cutAction->setShortcut(QKeySequence::New);    QAction *copyAction = new QAction(tr("&Copy"), this);    copyAction->setShortcut(QKeySequence::Copy);    QAction *pasteAction = new QAction(tr("&Paste"), this);    pasteAction->setShortcut(QKeySequence::Paste);    contextMenu->addAction(cutAction);    contextMenu->addAction(copyAction);    contextMenu->addAction(pasteAction);    contextMenu->exec(cur.pos());}

方法2：重新实现QWidget::contextMenuEvent()函数，

void Dialog::contextMenuEvent(QContextMenuEvent *event)//重写右键菜单{    QCursor cur=this->cursor();    QMenu *contextMenu = new QMenu(this);    QAction *cutAction = new QAction(tr("&New"), this);    cutAction->setShortcut(QKeySequence::New);    QAction *copyAction = new QAction(tr("&Copy"), this);    copyAction->setShortcut(QKeySequence::Copy);    QAction *pasteAction = new QAction(tr("&Paste"), this);    pasteAction->setShortcut(QKeySequence::Paste);    contextMenu->addAction(cutAction);    contextMenu->addAction(copyAction);    contextMenu->addAction(pasteAction);    //setContextMenuPolicy(Qt::ActionsContextMenu);    contextMenu->exec(cur.pos());}