//主要使用类
#include <Qstring>

#include <QMenu>

#include <QMenuBar>

#include <QToolBar>

#include <QTextEdit>

#include <QDockWidget>

#include <QStatusBar>

#include <QLabel>

#include <QDialog>

#include <QMessageBox>

#include <QFileDialog>

//菜单栏

    this->setMinimumSize(, );

    QMenuBar *myBar = menuBar();

    this->setMenuBar(myBar);

    QMenu *File = new QMenu(QString("文件"));

    myBar->addMenu(File);

    File->addAction(QString("新建"),[=]{

    });

    File->addSeparator();

    File->addAction(QString("打开"), [=]{

        QFileDialog::getOpenFileName(this, QString("打开文件"), QString("./"), QString("Images (*.png *.xpm *.jpg)"));

    });

    QAction *Abt = myBar->addAction(QString("模态"));

    QAction *Abt1 = myBar->addAction(QString("非模态"));

    //工具栏

    QToolBar *ToBar = new QToolBar;

    this->addToolBar(ToBar);

    ToBar->addAction(QString("新建"),[=]{

    });

    ToBar->addAction(QString("打开"), [=]{

    });

    //工作区

    QTextEdit *txt1 = new QTextEdit;

    this->setCentralWidget(txt1);

    //悬浮窗

    QDockWidget *dock = new QDockWidget(QString("txt"));

    QTextEdit *txt2 = new QTextEdit;

    dock->setWidget(txt2);

    this->addDockWidget(Qt::RightDockWidgetArea, dock);

    //状态栏

    QStatusBar *StBar = new QStatusBar;

    this->setStatusBar(StBar);

    QLabel *Lab1 = new QLabel(QString("状态栏:"));

    QLabel *Lab2 = new QLabel(QString(""));

    StBar->addWidget(Lab1);

    StBar->addPermanentWidget(Lab2);

    //模态对话框

    connect(Abt, &QAction::triggered, [=]

    {

        QDialog *d1 = new QDialog;

        d1->show();

        d1->setAttribute(Qt::WA_DeleteOnClose);

    });

    //非模态

    connect(Abt1, &QAction::triggered, [=]

    {

        QDialog *d2 = new QDialog;

        d2->exec();

        d2->setAttribute(Qt::WA_DeleteOnClose);

    });

    //MessageBox

    QAction *about1 = myBar->addAction(QString("关于"));

    connect(about1, &QAction::triggered, [=]

    {

       QMessageBox::about(this, QString("关于"), QString("关于qt"));

    });

    QAction *about2 = myBar->addAction(QString("保存/关闭"));

    connect(about2, &QAction::triggered, [=]

    {

       QMessageBox::StandardButton i = QMessageBox::question(this, QString("关于2"), QString("多按键"),QMessageBox::Save | QMessageBox::Close);

        switch(i)

        {

        case QMessageBox::Save:

        {

            Lab2->setText(QString("保存成功"));

        }

            break;

        case QMessageBox::Close:

        {

            Lab2->setText(QString("关闭"));

        }

            break;

        default:

            break;

        }

    });