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 = );
    ~MainWindow();

    QMenu* menu[];
    QAction* act[];
    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(,);
    this->centralWidget();

    status = new QStatusBar(this);

    menu[] = new QMenu("文件");
    menu[]->addAction("编辑");
    menu[]->addAction("查看");
    menu[]->addAction("工具");

    act[] = new QAction("新建",this);
    act[]->setShortcut(Qt::CTRL | Qt::Key_A );
    act[]->setStatusTip("这是一个新建菜单");

    act[] = new QAction("打开",this);
    act[]->setCheckable(true);

    menu[] = new QMenu("保存");
    menu[]->addAction(act[]);
    menu[]->addAction(act[]);

    menu[] = new QMenu("打印");
    menu[]->addAction("打印设置");
    menu[]->addMenu(menu[]);

    menuBar = new QMenuBar(this);
    menuBar->addMenu(menu[]);
    menuBar->addMenu(menu[]);
    menuBar->setGeometry(,,this->width(),);

    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();
}