Qt 布局管理之 停靠窗口QDockWidget

#ifndef DOCKWINDOWS_DOCKWINDOWS_H
#define DOCKWINDOWS_DOCKWINDOWS_H
#include <QMainWindow>
class DockWindows: public QMainWindow{
    Q_OBJECT
public:
    explicit DockWindows(QWidget*parent=0);
    ~DockWindows();
};
#endif //DOCKWINDOWS_DOCKWINDOWS_H
### DockWindows.cpp

#include "DockWindows.h"
#include <QTextEdit>
#include <QDockWidget>
DockWindows::DockWindows(QWidget *parent): QMainWindow(parent) {
    setWindowTitle(tr("DockWindows"));//主窗口标题栏
auto *te = new QTextEdit(this);
    te->setText(tr("Main Window"));
    te->setAlignment(Qt::AlignCenter);
    setCentralWidget(te);//将此窗口设置为主窗口的中央窗口
//停靠窗口1
auto *dock = new QDockWidget(tr("DockWindow1"), this);
//    可移动
    dock->setFeatures(QDockWidget::DockWidgetMovable);
    dock->setAllowedAreas(Qt::LeftDockWidgetArea|Qt::RightDockWidgetArea);
auto *te1 = new QTextEdit;
    te1->setText(tr("Window1 ,the dock widget can be moved between docks by the user"));
    dock->setWidget(te1);
    addDockWidget(Qt::RightDockWidgetArea,dock);
//停靠窗口2
    dock = new QDockWidget(tr("DockWindow2"), this);
    dock->setFeatures(QDockWidget::DockWidgetClosable|QDockWidget::DockWidgetFloatable);//可关闭可浮动
auto *te2 = new QTextEdit(tr("Window2 The dock widget can be detached from the main window,and floated as an independent window,and can be closed"));
    dock->setWidget(te2);
    addDockWidget(Qt::RightDockWidgetArea,dock);
//停靠窗口3
    dock = new QDockWidget(tr("DockWindow3"),this);
    dock->setFeatures(QDockWidget::AllDockWidgetFeatures);//全部特性
auto *te3 = new QTextEdit();
    te3->setText(tr("Window3,the dock widget can be cllose moved and floated"));
    dock->setWidget(te3);
    addDockWidget(Qt::RightDockWidgetArea,dock);
}
DockWindows::~DockWindows() {
}

#include <QApplication>
#include <QPushButton>
#include "DockWindows.h"
int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
   DockWindows d;
   d.show();
return QApplication::exec();
}