菜单栏工具栏状态栏核心控件，文本编辑区浮动窗口

怼烎@ 2021-11-23 05:01 303阅读 0赞

![20190725212747824.png][]

QT       += core gui
    
    greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
    
    TARGET = 05_QMainWindow
    TEMPLATE = app
    
    DEFINES += QT_DEPRECATED_WARNINGS
    
    
    SOURCES += \
            main.cpp \
            mainwindow.cpp
    
    HEADERS += \
            mainwindow.h
    
    #使用Lamda表达式
    CONFIG += C++11

![20190725212830507.png][]

#ifndef MAINWINDOW_H
    #define MAINWINDOW_H
    
    #include <QMainWindow>
    
    class MainWindow : public QMainWindow
    {
        Q_OBJECT
    
    public:
        MainWindow(QWidget *parent = 0);
        ~MainWindow();
    };
    
    #endif // MAINWINDOW_H

![20190725212923116.png][]

#include "mainwindow.h"
    #include <QApplication>
    
    int main(int argc, char *argv[])
    {
        QApplication a(argc, argv);
        MainWindow w;
        w.show();
    
        return a.exec();
    }

#include "mainwindow.h"
    #include <QDebug>
    #include <QPushButton>
    #include <QMenuBar> //菜单栏
    #include <QMenu> //菜单
    #include <QToolBar> //工具栏
    #include <QStatusBar> //状态栏
    #include <QLabel>
    #include <QTextEdit> //核心控件，文本编辑区
    #include <QDockWidget> //浮动窗口
    MainWindow::MainWindow(QWidget *parent)
        : QMainWindow(parent)
    {
        //1）菜单栏
        QMenuBar *mBar = menuBar();
          //添加菜单
         QMenu *pFile = mBar -> addMenu("文件");
    
         //添加菜单项，添加动作
        QAction *pNew = pFile -> addAction("新建");
            //Lamda表达式,信号处理
           connect(pNew,&QAction::triggered,
                    [=]()
                     {
                       qDebug() << "新建被按下";
                     }
                   );
    
           pFile -> addSeparator(); //添加分割线
          QAction *pOpen = pFile -> addAction("打开");
    
        //2）工具栏，菜单栏的快捷方式
          QToolBar *toolBar = addToolBar("toolBar");
           //工具栏添加快捷键
           toolBar -> addAction(pNew);
    
           QPushButton *b = new QPushButton(this);
             b -> setText("^_^");
             //添加小控件
             toolBar->addWidget(b);
              //Lamda表达式,信号处理
             connect(b, &QPushButton::clicked,
                         [=]()
                          {
                              b->setText("123");
                          }
                         );
          //3）状态栏
            QStatusBar *sBar = statusBar();
            QLabel *label = new QLabel(this);
            label->setText("Normal text file");
            sBar->addWidget(label);
            //addWidget 从左往右添加
            sBar->addWidget(new QLabel("2",this));
            //addPermanentWidget 从由往左添加
            sBar->addPermanentWidget(new QLabel("3",this));
    
         //4)核心控件
            QTextEdit *tEdit = new QTextEdit(this);
            setCentralWidget(tEdit);
    
        //5）浮动窗口
            QDockWidget *dock = new QDockWidget(this);
            addDockWidget(Qt::RightDockWidgetArea,dock);
    
            QTextEdit *textEdit1 = new QTextEdit(this);
            dock->setWidget(textEdit1);
    }
    
    MainWindow::~MainWindow()
    {
    
    }

### 效果： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzMTM0MjA4NDc3Ng_size_16_color_FFFFFF_t_70][]

[20190725212747824.png]: /images/20211122/2c82ce9b090a4d2a980550423b0b8ed2.png
[20190725212830507.png]: /images/20211122/cab08b2f7dad48a289edcaecbaf539bf.png
[20190725212923116.png]: /images/20211122/b879b2eaf6e942bd81d8164f77bf0e11.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzMTM0MjA4NDc3Ng_size_16_color_FFFFFF_t_70]: /images/20211122/ee67c1dbc69747fba8aec925f849b91c.png