1.所需頭文件

#include <QPoint>    // QPoint 類型
#include <QWidget>   // mapFromGlobal() 的父類
#include <QEvent>    // event->globalPos() 的來源（如 QMouseEvent）
#include <QContextMenuEvent> // 用于 QContextMenuEvent
#include <QMenu>             // 用于 QMenu（如果 m_contextMenu 是 QMenu 類型）

2.重寫contextMenuEvent

.h文件中：

protected:void contextMenuEvent(QContextMenuEvent *event) override;

實例函數：

void MainWindow::contextMenuEvent(QContextMenuEvent *event)
{//把鼠標位置轉化成相對于QWidget的位置，然后判斷是否在tvRecipe內.QPoint i = ui->tvRecipe->mapFromGlobal(event->globalPos());QRect rect(QPoint(0,0),ui->tvRecipe->size());if (rect.contains(i)){m_contextMenu->exec(event->globalPos());}}  其中tvRecipe為在.ui 文件中添加的容器。

3.建立右鍵菜單

.h文件中定義

 QMenu *m_contextMenu;//菜單名QAction *m_addAction;//添加行為QAction *m_explodeAction;//擴展行為QAction *m_detailAction;//詳情行為private slots:void showDetail();void addPatient();void explodeAll();//對應槽函數

初始化菜單欄，建立鏈接，槽函數初始化

m_contextMenu = new QMenu;m_addAction = new QAction("增加項目",this);m_detailAction=new QAction("項目詳情",this);m_explodeAction = new QAction("擴展所有",this);m_contextMenu->addAction(m_addAction);m_contextMenu->addAction(m_explodeAction);m_contextMenu->addAction(m_detailAction);connect(m_addAction, &QAction::triggered, this, &MainWindow::addPatient);connect(m_detailAction, &QAction::triggered, this, &MainWindow::showDetail);connect(m_explodeAction, &QAction::triggered, this, &MainWindow::explodeAll);

槽函數~回調函數

void MainWindow::addPatient()
{QMessageBox::information(this,"","addPatient");
}void MainWindow::showDetail()
{QMessageBox::information(this,"","showdetail");
}void MainWindow::explodeAll()
{QMessageBox::information(this,"","explodeAll");}

4.實驗效果