Qt-可停靠視窗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("視圖"));      

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

createDockWidget();      

this->setWindowTitle(tr("停靠視窗"));      

}      

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()      

{      

}