QMenuBar QMenu 自定义菜单栏 基本控件（八）

一、效果图

二、代码

#include "menuwidget.h"
#include "ui_menuwidget.h"
#include <QMenuBar>
#include <QMenu>
#include <QAction>
#include <QDebug>
#include <QKeySequence>
menuWidget::menuWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::menuWidget)
{
    ui->setupUi(this);

    QMenu *fileMenu = new QMenu;
    fileMenu->addAction(QString::fromLocal8Bit("新建文件或项目"));
    fileMenu->addAction(QString::fromLocal8Bit("打开文件或项目"));
    fileMenu->addSeparator();
    fileMenu->addAction(QString::fromLocal8Bit("打开文件,用..."));
    fileMenu->addAction(QString::fromLocal8Bit("最近访问的文件"));
    fileMenu->addAction(QString::fromLocal8Bit("最近使用的项目"));
    QList<QAction*> Actions = fileMenu->actions();
    Actions.value(0)->setShortcut(QKeySequence::New);
    Actions.value(1)->setShortcut(QKeySequence::Open);
    Actions.value(2)->setShortcut(QKeySequence::Close);
    Actions.value(3)->setShortcut(QKeySequence::Copy);
    Actions.value(4)->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_F));

    QMenu *editMenu = new QMenu;
    editMenu->addAction("Undo");
    editMenu->addAction("Redo");
    editMenu->addSeparator();
    editMenu->addAction("Remove");
    editMenu->addAction("Delete");
    editMenu->addAction("Advanced");

    QMenuBar *bar = new QMenuBar(this);
    bar->addAction(new QAction(QString::fromLocal8Bit("文件")));
    bar->addAction(new QAction(QString::fromLocal8Bit("编辑")));
    bar->addAction(new QAction(QString::fromLocal8Bit("构建")));
    bar->addAction(new QAction(QString::fromLocal8Bit("调试")));
    bar->addAction(new QAction(QString::fromLocal8Bit("Analyze")));
    bar->addAction(new QAction(QString::fromLocal8Bit("工具")));
    bar->addAction(new QAction(QString::fromLocal8Bit("控件")));
    bar->addAction(new QAction(QString::fromLocal8Bit("帮助")));

    bar->actions().value(0)->setMenu(fileMenu);
    bar->actions().value(1)->setMenu(editMenu);

    bar->actions().value(0)->setShortcut(Qt::ALT + Qt::Key_N);
    bar->actions().value(1)->setShortcut(Qt::ALT + Qt::Key_E);


    connect(bar,&QMenuBar::triggered,this,[=](QAction *action){
        int index = bar->actions().indexOf(action);
        qDebug()<<mapToGlobal(bar->pos());
        if(index == 0){
            fileMenu->move(mapToGlobal(bar->pos()) + QPoint(0,bar->height()));
            fileMenu->show();
        }

        if(index == 1){
            editMenu->move(mapToGlobal(bar->pos()) + QPoint(43,bar->height()));
            editMenu->show();
        }
    });
    show();
}

menuWidget::~menuWidget()
{
    delete ui;
}