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_OBJECT

public:
    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();
}