Qt5-控件-QMenu,QMenuBar-菜单栏详解-菜单热键-菜单校验功能

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>#include <QMenu>#include <QMenuBar>#include <QStatusBar>class MainWindow : public QMainWindow{    Q_OBJECTpublic:    MainWindow(QWidget *parent = 0);    ~MainWindow();    QMenu* menu[10];    QAction* act[10];    QMenuBar* menuBar ;    QStatusBar* status ;public slots:    void trigerMenu(QAction* act);};#endif // MAINWINDOW_H

#include "mainwindow.h"#include <Qt>#include <QtDebug>MainWindow::MainWindow(QWidget *parent)    : QMainWindow(parent){    this->resize(400,300);    this->centralWidget();    status = new QStatusBar(this);    menu[0] = new QMenu("文件");    menu[0]->addAction("编辑");    menu[0]->addAction("查看");    menu[0]->addAction("工具");    act[0] = new QAction("新建",this);    act[0]->setShortcut(Qt::CTRL | Qt::Key_A );    act[0]->setStatusTip("这是一个新建菜单");    act[1] = new QAction("打开",this);    act[1]->setCheckable(true);    menu[1] = new QMenu("保存");    menu[1]->addAction(act[0]);    menu[1]->addAction(act[1]);    menu[2] = new QMenu("打印");    menu[2]->addAction("打印设置");    menu[2]->addMenu(menu[1]);    menuBar = new QMenuBar(this);    menuBar->addMenu(menu[0]);    menuBar->addMenu(menu[2]);    menuBar->setGeometry(0,0,this->width(),30);    connect(menuBar,SIGNAL(triggered(QAction*)),this,SLOT(trigerMenu(QAction*)));}MainWindow::~MainWindow(){}void MainWindow::trigerMenu(QAction* act){    if(act->text() == "新建")    {        qDebug()<<"新建菜单被按下";    }}

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