[TOC] ## 概述 實例 ``` //創建右鍵菜單對象 m_menuContext = new QMenu(tr("ContextMenu")); //右鍵菜單其實不顯示ContextMenu文本 //創建“添加條目”菜單項并添加到菜單 QAction *actAdd = new QAction(tr("添加條目"), this); m_menuContext->addAction( actAdd ); //創建“編輯條目”菜單項并添加到菜單 QAction *actEdit = new QAction(tr("編輯條目"), this); m_menuContext->addAction( actEdit ); //創建“刪除條目”菜單項并添加到菜單 QAction *actDel = new QAction(tr("刪除條目"), this); m_menuContext->addAction( actDel ); //創建“清空所有”菜單項并添加到菜單 QAction *actClearAll = new QAction(tr("清空所有"), this); m_menuContext->addAction( actClearAll ); connect(ui->listWidget, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(onCustomContextMenuRequested(QPoint)) ); //為四個菜單項關聯點擊信號到槽函數 connect(actAdd, SIGNAL(triggered()), this, SLOT(onAddItemTriggered())); connect(actEdit, SIGNAL(triggered()), this, SLOT(onEditItemTriggered())); connect(actDel, SIGNAL(triggered()), this, SLOT(onDelItemTriggered())); connect(actClearAll, SIGNAL(triggered()), this, SLOT(onClearAllTriggered())); ``` 設置右鍵彈出菜單 ``` void Widget::onCustomContextMenuRequested(const QPoint & pos) { //控件內的相對坐標轉為屏幕坐標 //是列表控件發出的信號，就用列表控件的轉換函數 QPoint screenPos = ui->listWidget->mapToGlobal( pos ); //彈出菜單 QAction *actRet = m_menuContext->exec( screenPos ); if(NULL != actRet)//檢查非空才能使用該指針 { qDebug()<<tr("返回的菜單項：") + actRet->text(); } } ``` 彈出右鍵菜單的槽函數 ``` void Widget::onCustomContextMenuRequested(const QPoint & pos) { //控件內的相對坐標轉為屏幕坐標 //是列表控件發出的信號，就用列表控件的轉換函數 QPoint screenPos = ui->listWidget->mapToGlobal( pos ); //彈出菜單 QAction *actRet = m_menuContext->exec( screenPos ); if(NULL != actRet)//檢查非空才能使用該指針 { qDebug()<<tr("返回的菜單項：") + actRet->text(); } } ```