Qt：QMenu设置快解键&添加动作

落日映苍穹つ 2023-01-12 11:46 123阅读 0赞

1、新建QTGUI应用，基类选择QWidget，取消创建界面

2、

![4aaa856b1fe30ab27e65b8a2b64996c1445.jpg][]

添加菜单

![e3df43258c07a34a363cdf43858a9cc9cb1.jpg][]

#include <QMenu>
    #include <QMenuBar>
    #include <QAction>
    #include <QLabel>
    
    Widget::Widget(QWidget *parent)
        : QWidget(parent)
    {
        QMenuBar *menuBar = new QMenuBar(this);
    
        QMenu *menu[3];
        menu[0] = new QMenu("File");
        menu[0]->addAction("Edit");
        menu[0]->addAction("View");
        menu[0]->addAction("Tools");
    
        menu[1] = new QMenu("Save");
        QAction     *act[2];
    
        act[0] = new QAction("New", this);
        act[0]->setShortcut(Qt::CTRL | Qt::Key_A);
        act[0]->setStatusTip("This is a New menu.");
        menu[1]->addAction(act[0]);
    
        act[1] = new QAction("Open", this);
        act[1]->setCheckable(true);
    
        menu[1]->addAction(act[1]);
    
        menu[2] = new QMenu("Print");
        menu[2]->addAction("Page Setup");
        menu[2]->addMenu(menu[1]);
    
        menuBar->addMenu(menu[0]);
        menuBar->addMenu(menu[2]);
    
        menuBar->addMenu(menu[0]);
        menuBar->setGeometry(0, 0, 600, 40);
    
        lbl = new QLabel("",this);
        lbl->setGeometry(10, 70, 200, 40);
    
        connect(menuBar, SIGNAL(triggered(QAction*)), this,
                         SLOT(trigerMenu(QAction*)));
    
    }
    
    void Widget::trigerMenu(QAction *act)
    {
        QString str = QString("Selected Menu : %1").arg(act->text());
        lbl->setText(str);
    }

![b99531dbb5e7be98c3a493a94059cb1780a.jpg][]

[4aaa856b1fe30ab27e65b8a2b64996c1445.jpg]: /images/20221119/eb804c4146b840f8b4243d88bb87b369.png
[e3df43258c07a34a363cdf43858a9cc9cb1.jpg]: /images/20221119/e4f862c19bc24d5d90170eb65e994f38.png
[b99531dbb5e7be98c3a493a94059cb1780a.jpg]: /images/20221119/d9a8b614aaa444b68626b9fa3582fc04.png