Qt-可停靠窗口QDockwidget

mainwindow.h:

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include<QMainWindow>

#include<QToolBar>

#include<QMenuBar>

#include<QTextEdit>

class MainWindow : public QMainWindow

{

    Q_OBJECT

        QTextEdit *textEdit;

        QMenu *viewMenu;

        QToolBar *viewToolBar;

        void createDockWidget();

public:

    MainWindow(QWidget *parent = 0);

    ~MainWindow();

};

#endif // MAINWINDOW_H

mainwindow.cpp:

#include "mainwindow.h"

#include<QDockWidget>

#include<QCalendarWidget>

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

{

textEdit = new QTextEdit;

this->setCentralWidget(textEdit);

viewMenu = menuBar()->addMenu(tr("视图"));

viewToolBar = this->addToolBar(tr(" "));

createDockWidget();

this->setWindowTitle(tr("停靠窗口"));

}

 void MainWindow::createDockWidget()

 {

  QDockWidget *dock = new QDockWidget(this);

  dock->setWindowTitle(tr("日期"));

  dock->setAllowedAreas(Qt::AllDockWidgetAreas);

  QCalendarWidget *calendar = new QCalendarWidget;

  dock->setWidget(calendar);

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

  viewMenu->addAction(dock->toggleViewAction());

  viewToolBar->addAction(dock->toggleViewAction());

 }

MainWindow::~MainWindow()

{

}