利用Qt实现为控件添加右键菜单的功能.rar

#include "widget.h" #include "ui_widget.h" #include<QMenu> Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); //添加右键菜单策略,以响应customContextMenuRequested()信号 ui->pushButton->setContextMenuPolicy(Qt::CustomContextMenu); } Widget::~Widget() { delete ui; } //按钮点击槽函数 void Widget::on_pushButton_clicked() { //相关功能 } void Widget::on_pushButton_customContextMenuRequested(const QPoint &pos) { QMenu *cmenu = new QMenu(ui->pushButton);//新建Menu //新建三个右键菜单,分别为Menu1,Menu2,Menu3 QAction *action1 = cmenu->addAction("Menu 1"); QAction *action2 = cmenu->addAction("Menu 2"); QAction *action3 = cmenu->addAction("Menu 3"); //连接这三个菜单项触发动作和对应的槽函数 connect(action1, SIGNAL(triggered(bool)), this, SLOT(on_menu_click(bool))); connect(action2, SIGNAL(triggered(bool)), this, SLOT(on_menu_click(bool))); connect(action3, SIGNAL(triggered(bool)), this, SLOT(on_menu_click(bool))); cmenu->exec(QCursor::pos());//呼出菜单 }