程序運行截圖如下：

一種是使用setContextMenuPolicy然后使用信號和槽關聯。
一種是重寫void contextMenuEvent(QContextMenuEvent *event);

程序結構如下圖：

代碼如下圖：
mytreeview.h

#ifndef MYTREEVIEW_H #define MYTREEVIEW_H#include <QTreeView>class MyTreeView : public QTreeView {Q_OBJECT public:MyTreeView(QWidget *parent=0);protected:void contextMenuEvent(QContextMenuEvent *event); };#endif // MYTREEVIEW_H

widget.h

#ifndef WIDGET_H #define WIDGET_H#include <QWidget>namespace Ui { class Widget; }class Widget : public QWidget {Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();private:Ui::Widget *ui;private slots:void onContextMenu(const QPoint &pt); };#endif // WIDGET_H

main.cpp

#include "widget.h" #include <QApplication>int main(int argc, char *argv[]) {QApplication a(argc, argv);Widget w;w.show();return a.exec(); }

mytreeview.cpp

#include "mytreeview.h" #include <QContextMenuEvent> #include <QMenu>MyTreeView::MyTreeView(QWidget *parent):QTreeView(parent) {}void MyTreeView::contextMenuEvent(QContextMenuEvent *event) {QMenu menu;menu.addAction("第一個Action");menu.addAction("第二個Action");menu.exec(event->globalPos());}

widget.cpp

#include "widget.h" #include "ui_widget.h"#include <QMenu>Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget) {ui->setupUi(this);ui->treeView->setContextMenuPolicy(Qt::CustomContextMenu);connect(ui->treeView,SIGNAL(customContextMenuRequested(QPoint)),this,SLOT(onContextMenu(QPoint))); }Widget::~Widget() {delete ui; }void Widget::onContextMenu(const QPoint &pt) {QMenu menu;menu.addAction("第一個Action");menu.addAction("第二個Action");menu.exec(ui->treeView->mapToGlobal(pt)); }

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