QT中主窗口实现

#include "mainwindow.h"
#include <QMenuBar>
#include <QToolBar>
#include <QStatusBar>
#include <QLabel>
#include <QDockWidget>
#include <QTextEdit>

MainWindow::MainWindow(QWidget *parent): QMainWindow(parent)
{
    this->resize(1200,600);

    //创建菜单栏，只能有一个
    QMenuBar* menuBarPointer = menuBar();
    this->setMenuBar(menuBarPointer);
    QMenu* menuFile = menuBarPointer->addMenu("文件");
    QAction* menuFile_AddNew = menuFile->addAction("新建文件或项目");
    menuFile->addSeparator();
    QAction* menuFile_Open = menuFile->addAction("打开文件或项目");
    QMenu* affiliateMenu = new QMenu(this);
    menuFile_AddNew->setMenu(affiliateMenu);
    affiliateMenu->addAction("子菜单1");
    affiliateMenu->addAction("子菜单2");

    //创建工具栏，可以有多个
    QToolBar* toolBarPointer = new QToolBar(this);
    this->addToolBar(Qt::LeftToolBarArea,toolBarPointer);
    toolBarPointer->setMovable(true);
    toolBarPointer->setFloatable(false);
    toolBarPointer->setAllowedAreas(Qt::LeftToolBarArea | Qt::RightToolBarArea);
    QMenu* menuTest = new QMenu("测试1",this);
    QAction* actionWelcome = menuTest->addAction("欢迎");
    QMenu* menuWelcome = new QMenu("测试2",this);
    actionWelcome->setMenu(menuWelcome);
    menuWelcome->addAction("项目");
    menuWelcome->addAction("示例");
    menuWelcome->addAction("教程");
    toolBarPointer->addAction(actionWelcome);

    //创建状态栏，只能有一个
    QStatusBar* statusBarPointer = statusBar();
    this->setStatusBar(statusBarPointer);
    QLabel* labelPointer1 = new QLabel("左侧信息",this);
    statusBarPointer->addWidget(labelPointer1);
    QLabel* labelPointer2 = new QLabel("右侧信息",this);
    statusBarPointer->addPermanentWidget(labelPointer2);
    QLabel* labelPointer3 = new QLabel("插入信息",this);
    statusBarPointer->insertWidget(0,labelPointer3);

    //创建铆接部件，可以有多个
    QDockWidget* dockWidgetPointer1 = new QDockWidget("浮动窗口",this);
    this->addDockWidget(Qt::BottomDockWidgetArea,dockWidgetPointer1);
    dockWidgetPointer1->setAllowedAreas(Qt::TopDockWidgetArea | Qt::BottomDockWidgetArea);

    //创建中心部件，只能有一个
    QTextEdit* textEditPointer = new QTextEdit(this);
    setCentralWidget(textEditPointer);
}

MainWindow::~MainWindow()
{
}

结果如下图所示：