效果如下：

#include "mainwindow.h"

#include <QTextEdit>

#include <QDockWidget>

#include <QMenu>

#include <QAction>

#include <QMenuBar>

#include <QDebug>

#include <QFileDialog>

#include <QImage>

#include <QLabel>

#include <QPixmap>

#include <QStatusBar>

#include <QToolBar>

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

{

    resize(1000, 800);

    QMenu *fileMenu = new QMenu("文件",this);

    QAction *openAct = new QAction("打开", this);

    fileMenu->addAction(openAct);

    connect(openAct, SIGNAL(triggered(bool)), this, SLOT(slotOpen()));

    menuBar()->addMenu(fileMenu);

    //状态栏

    QLabel *msgLabel = new QLabel;

    msgLabel->setStyleSheet(" QLabel{ color: red }");

    msgLabel->setText("Ready :");

    statusBar()->addPermanentWidget(msgLabel); //addWidget

    //工具栏  添加资源文件加入图片  响应再用connect连接槽

    QAction* openFile = new QAction(QIcon(":/ui/image/file.png"), tr("aaaa"), this);

    openFile->setToolTip("abcdeoghicd");

    QToolBar *toolBar = this->addToolBar("文件");

    toolBar->addAction(openFile);

    setWindowTitle("DockWidget Demo");

    QTextEdit *mainEdit = new QTextEdit(this);

    mainEdit->setAlignment(Qt::AlignCenter);

    mainEdit->setText("Main");

    setCentralWidget(mainEdit);

    QDockWidget * dock1 = new QDockWidget("DockWindow1",this);

    dock1->setFeatures(QDockWidget::DockWidgetMovable);

    dock1->setAllowedAreas( Qt::RightDockWidgetArea | Qt::BottomDockWidgetArea);

    QTextEdit *edit1 = new QTextEdit();

    edit1->setText("window1, the dock widget can be moved ");

    dock1->setWidget(edit1);

    QDockWidget * dock2 = new QDockWidget("DockWindow2",this);

    dock2->setFeatures(QDockWidget::DockWidgetMovable| QDockWidget::DockWidgetClosable);

    dock2->setAllowedAreas( Qt::RightDockWidgetArea | Qt::BottomDockWidgetArea);

    QTextEdit *edit2 = new QTextEdit();

    edit2->setText("window2, the dock widget can be moved ");

    dock2->setWidget(edit2);

    QDockWidget * dock3 = new QDockWidget("DockWindow3",this);

    dock3->setFeatures(QDockWidget::DockWidgetMovable| QDockWidget::DockWidgetClosable);

    dock3->setAllowedAreas( Qt::RightDockWidgetArea | Qt::BottomDockWidgetArea);

    QTextEdit *edit3 = new QTextEdit();

    edit3->setText("window3, the dock widget can be moved ");

    dock3->setWidget(edit3);

    this->addDockWidget( Qt::BottomDockWidgetArea, dock1);

    this->addDockWidget( Qt::BottomDockWidgetArea, dock2);

    this->addDockWidget( Qt::BottomDockWidgetArea, dock3);

    tabifyDockWidget(dock1,dock2); //页签

    tabifyDockWidget(dock2, dock3);

    dock1->raise();//定位第一个标签

    QDockWidget * dock4 = new QDockWidget("DockWindow4",this);

    dock4->setFeatures(QDockWidget::DockWidgetMovable| QDockWidget::DockWidgetClosable);

    dock4->setAllowedAreas( Qt::RightDockWidgetArea | Qt::BottomDockWidgetArea);

    QTextEdit *edit4 = new QTextEdit();

    edit4->setText("window4, the dock widget is sha bi");

    dock4->setWidget(edit4);

    QDockWidget * dock5 = new QDockWidget("DockWindow4",this);

    dock5->setFeatures(QDockWidget::DockWidgetMovable| QDockWidget::DockWidgetClosable);

    dock5->setAllowedAreas( Qt::RightDockWidgetArea | Qt::BottomDockWidgetArea);

    QTextEdit *edit5 = new QTextEdit();

    edit5->setText("window5, the dock widget is great");

    dock5->setWidget(edit5);

    this->addDockWidget(Qt::RightDockWidgetArea, dock4);

    this->addDockWidget(Qt::RightDockWidgetArea, dock5);

}

void MainWindow::slotOpen()

{

    QString pathName;

    pathName = QFileDialog::getOpenFileName(this, "打开", "", "history(*.txt)");

    qDebug()<<"打开文件----------------------"<<pathName;

}

MainWindow::~MainWindow()

{

}