Qt学习：Qt中QDockWidget的简单用法

下面是这个例子的效果：

        当然还可以控制两个停靠窗口停在四个停靠区的哪个区，这里不贴效果图了。

                代码如下：

//dockwindow.h
#ifndef DOCKWINDOW_H
#define DOCKWINDOW_H

#include <QMainWindow>

class QMenu;
class QToolBar;
class QAction;
class QTextEdit;

class DockWindow : public QMainWindow
{
    Q_OBJECT
    
public:
    DockWindow(QWidget *parent = 0);
    ~DockWindow();

private slots:
    void newFile();
    void save();
    void about();

private:
    void createMenus();
    void createActions();
    void createToolBars();
    void createStatusBars();
    void createDockWindows();

    QMenu *fileMenu;
    QMenu *viewMenu;
    QMenu *helpMenu;

    QToolBar *fileToolBar;
    QToolBar *viewToolBar;
    QToolBar *helpToolBar;

    QAction *newAction;
    QAction *saveAction;
    QAction *exitAction;
    QAction *aboutAction;

    QTextEdit *textEdit;
};

#endif // DOCKWINDOW_H

 

//dockwindow.cpp
#include <QtGui>
#include "dockwindow.h"

DockWindow::DockWindow(QWidget *parent)
    : QMainWindow(parent)
{
    textEdit = new QTextEdit;
    setCentralWidget(textEdit);

    createActions();
    createMenus();
    createToolBars();
    createStatusBars();
    createDockWindows();

    setWindowTitle(tr("Dock Window"));
}

void DockWindow::newFile()
{
    textEdit->clear();
    QMessageBox::about(this, tr("Dock Window"),
                       tr("you triggered the"
                          "\nnewFileSlot successfully"));
}

void DockWindow::save()
{
    QMessageBox::information(this, tr("Dock Window"),
                             tr("Save the file ?"),
                             QMessageBox::Ok | QMessageBox::No
                             | QMessageBox::Cancel);
}

void DockWindow::about()
{
    QMessageBox::warning(this, tr("Dock Window"),
                         tr("Thanks"),QMessageBox::Yes | QMessageBox::No);
}

void DockWindow::createActions()
{
    newAction = new QAction(tr("&New"),this);
    newAction->setShortcut(QKeySequence::New);
    newAction->setStatusTip(tr("create a new file"));
    connect(newAction, SIGNAL(triggered()), this, SLOT(newFile()));

    saveAction = new QAction(tr("&Save"),this);
    saveAction->setShortcut(QKeySequence::Save);
    saveAction->setStatusTip(tr("save a exist file"));
    connect(saveAction, SIGNAL(triggered()), this, SLOT(save()));

    exitAction = new QAction(tr("E&xit"),this);
    exitAction->setShortcut(QKeySequence::Close);
    exitAction->setStatusTip(tr("quit the application"));
    connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));

    aboutAction = new QAction(tr("About"),this);
    connect(aboutAction, SIGNAL(triggered()), this, SLOT(about()));
}

void DockWindow::createMenus()
{
    fileMenu = menuBar()->addMenu(tr("&File"));
    fileMenu->addAction(newAction);
    fileMenu->addAction(saveAction);
    fileMenu->addSeparator();
    fileMenu->addAction(exitAction);

    viewMenu = menuBar()->addMenu(tr("&View"));

    helpMenu = menuBar()->addMenu(tr("&Help"));
    helpMenu->addAction(aboutAction);
}

void DockWindow::createToolBars()
{
    fileToolBar = addToolBar(tr("&File"));
    fileToolBar->addAction(newAction);
    fileToolBar->addAction(saveAction);
    fileToolBar->addAction(exitAction);

    viewToolBar = addToolBar(tr("&View"));

    helpToolBar = addToolBar(tr("&Help"));
    helpToolBar->addAction(aboutAction);
}

void DockWindow::createStatusBars()
{
    statusBar()->showMessage(tr("Ready"));
}

void DockWindow::createDockWindows()
{
    QCalendarWidget *calendar = new QCalendarWidget;
    QDockWidget *calendarDockWidget = new QDockWidget(this);
    calendarDockWidget->setWindowTitle(tr("Calendar"));
    calendarDockWidget->setWidget(calendar);
    calendarDockWidget->setFeatures(QDockWidget::AllDockWidgetFeatures);
    calendarDockWidget->setAllowedAreas(Qt::AllDockWidgetAreas);
    addDockWidget(Qt::RightDockWidgetArea,calendarDockWidget);

    viewMenu->addAction(calendarDockWidget->toggleViewAction());
    viewToolBar->addAction(calendarDockWidget->toggleViewAction());

    QDockWidget *textDockWidget = new QDockWidget(this);
    textDockWidget->setWindowTitle(tr("About Me"));
    textDockWidget->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::BottomDockWidgetArea);
    QTextEdit *myInfo = new QTextEdit(tr("<br>Welcom</br><br>blog address:hhtp://blog.youkuaiyun.com/qiurisuixiang</br>"));
    textDockWidget->setWidget(myInfo);
    addDockWidget(Qt::BottomDockWidgetArea, textDockWidget);
    viewMenu->addAction(textDockWidget->toggleViewAction());
    viewToolBar->addAction(textDockWidget->toggleViewAction());
}

DockWindow::~DockWindow()
{
}

//main.cpp
#include "dockwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    DockWindow dockWindow;
    dockWindow.show();
    
    return app.exec();
}

       总结一下，创建一个停靠窗口大概需要以下几个步骤：
        1、创建一个自己的widget窗口，并设置它的各种属性（这里创建了一个QCalendarWidget和一个QTextEdit对象，并对其一些属性进行了设置）。
        2、创建一个QDockWidget对象，并设置这个QDockWidget对象的一些属性。
                诸如： calendarDockWidget->setFeatures(QDockWidget::AllDockWidgetFeatures);
                            calendarDockWidget->setAllowedAreas(Qt::AllDockWidgetAreas);
        3、把自己的widget窗口添加到这个停靠窗口中。
                             calendarDockWidget->setWidget(calendar); （这里说添加可能不太准确，一时找不懂合适的词来描述）。
        4、把这个停靠窗口加到QMainWindow的指定的位置。
                            addDockWidget(Qt::RightDockWidgetArea,calendarDockWidget);