QT learning diary 7 - qmainwindow

Catalog

One 、QMainWindow brief introduction

1.1 written words

1.2 Icon

Two 、 Create interface

2.1 choice QMainWindow

2.2 Create menu bar

2.3 Create toolbars

2.4 status bar

2.5 Riveted parts

2.6 Set the center part

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One 、QMainWindow brief introduction

1.1 written words

QMainWindow Is a class that provides the main window program for users , Contains a menu bar （menu bar）、 Multiple toolbars （tool bars）、 Multiple anchoring components （dock widgets）、 A status bar （status bar） And a central part （central widget）, Is the foundation of many applications , Like a text editor , Picture editor, etc

1.2 Icon

Two 、 Create interface

2.1 choice QMainWindow

2.2 Create menu bar

1、 Create a menu bar without throwing it on the screen

2、 Put the menu bar in the window , And create a menu

There can be at most one menu bar

#include "mainwindow.h"
#include <QMenuBar>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    //  Reset window size 
    resize(600, 400);

    //  Menu bar create 
    QMenuBar *bar = menuBar();

    //  Put the menu bar in the window 
    setMenuBar(bar);

    //  Create a menu 
    QMenu* fileMenu = bar->addMenu(" file ");
    QMenu* editMenu = bar->addMenu(" edit ");
}

MainWindow::~MainWindow()
{
}

3、 Create menu items

4、 Add separator

2.3 Create toolbars

1、 Default generation

#include "mainwindow.h"
#include <QMenuBar>
#include <QToolBar>
#include <QDebug>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    //  Reset window size 
    resize(600, 400);

    //  Menu bar create 
    QMenuBar *bar = menuBar();

    //  Put the menu bar in the window 
    setMenuBar(bar);

    //  Create a menu 
    QMenu* fileMenu = bar->addMenu(" file ");
    QMenu* editMenu = bar->addMenu(" edit ");

    fileMenu->addAction(" newly build ");
    fileMenu->addSeparator();
    fileMenu->addAction(" open ");

    QToolBar* toolBar = new QToolBar(this);
    addToolBar(toolBar);
}

MainWindow::~MainWindow()
{
}

2、 Generate on the left

You can check the documentation about other parameters of this function

3、 Only left and right stops are allowed

4、 Floating is not allowed

5、 Mobile main switch

Turn off this switch , The above settings are meaningless

toolBar->setMovable(false);

6、 Set the content in the toolbar

#include "mainwindow.h"
#include <QMenuBar>
#include <QToolBar>
#include <QDebug>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    //  Reset window size 
    resize(600, 400);

    //  Menu bar create 
    QMenuBar *bar = menuBar();

    //  Put the menu bar in the window 
    setMenuBar(bar);

    //  Create a menu 
    QMenu* fileMenu = bar->addMenu(" file ");
    QMenu* editMenu = bar->addMenu(" edit ");

    QAction* newAction = fileMenu->addAction(" newly build ");
    fileMenu->addSeparator();
    QAction* openAction = fileMenu->addAction(" open ");

    QToolBar* toolBar = new QToolBar(this);
    addToolBar(Qt::LeftToolBarArea, toolBar);

    //  Only   Left and right docking 
    toolBar->setAllowedAreas(Qt::LeftToolBarArea | Qt::RightToolBarArea );

    toolBar->setFloatable(false);

    toolBar->addAction(newAction);
    toolBar->addAction(openAction);
}

MainWindow::~MainWindow()
{
}

Add separation lines

7、 Add controls to the toolbar

 

2.4 status bar

1、 status bar

There can be at most one

#include "mainwindow.h"
#include <QMenuBar>
#include <QToolBar>
#include <QDebug>
#include <QPushButton>
#include <QStatusBar>
#include <QLabel>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    //  Reset window size 
    resize(600, 400);

    //  Menu bar create 
    QMenuBar *bar = menuBar();

    //  Put the menu bar in the window 
    setMenuBar(bar);

    //  Create a menu 
    QMenu* fileMenu = bar->addMenu(" file ");
    QMenu* editMenu = bar->addMenu(" edit ");

    QAction* newAction = fileMenu->addAction(" newly build ");
    fileMenu->addSeparator();
    QAction* openAction = fileMenu->addAction(" open ");

    QToolBar* toolBar = new QToolBar(this);
    addToolBar(Qt::LeftToolBarArea, toolBar);

    //  Only   Left and right docking 
    toolBar->setAllowedAreas(Qt::LeftToolBarArea | Qt::RightToolBarArea );

    toolBar->setFloatable(false);

    toolBar->addAction(newAction);
    toolBar->addSeparator();
    toolBar->addAction(openAction);

    QPushButton* btn = new QPushButton("aa", this);
    toolBar->addWidget(btn);

    //  status bar   There is at most one 
    QStatusBar* stBar = statusBar();
    //  Set to the window 
    setStatusBar(stBar);

    //  Create a label control 
    QLabel* label = new QLabel(" Prompt information ", this);

    //  Put the label control in the status bar 
    stBar->addWidget(label);
}

 

2、 Prompt message on the right  

 

2.5 Riveted parts

Header file #include <QDockWidget> 

 

Set the post docking area , Only up and down allowed

 

2.6 Set the center part

You can only set one

Add header file   #include <QTextEdit>