Have a look Qt Layout management mechanism and Qt Control for , Just put it all together , Wrote a simple Qt code

What's more, I want to ask if there is an introduction Qt Procedures such as the implementation of calculator type can practice a hand , Consolidate your knowledge !


<pre style="margin-top: 0px; margin-bottom: 0px;"><span style="
color:#000080;">#include</span><span style=" color:#c0c0c0;"> </span><span
style=" color:#008000;">"mainwindow.h"</span> #include <QApplication> int main(
int argc, char *argv[]) { QApplication a(argc, argv); MainWindow w; w.show();
return a.exec(); }


#ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QMainWindow> #include
<QMenu> #include<QMenuBar> #include<QAction> #include<QToolBar> #include
<QDialog> #include<QPushButton> #include<QVBoxLayout> #include<QHBoxLayout>
#include<QGridLayout> #include<QLineEdit> #include<QLabel> class MainWindow :
public QMainWindow { Q_OBJECT public: MainWindow(QWidget *parent = 0); ~
MainWindow(); protected: QMenu *File; QMenu *Edit; QMenu *Window; QMenu *Help;
QMenuBar *total; QAction *open; QAction *save; QAction *cancel; QAction *chat;
QToolBar *Tool1; QToolBar *Tool2; public slots: void openclicked();// Define slot function };
#endif // MAINWINDOW_H


#include "mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow
(parent) { this->setFixedSize(400,300); open=new QAction(QIcon(":/image/clean"),
"open",this); open->setStatusTip("you will open a messagebox"); statusBar();
// It is a function of a class, so it can be called directly , show the status bar save=new QAction(QIcon(":/image/download"),"save",this);
cancel=new QAction(QIcon(":/image/alert"),"cancel",this); chat=new QAction(QIcon
(":/image/chat"),"chat",this); File=new QMenu(" File ");// Add action to menu bar File
->addAction(open); Edit=new QMenu(" Edit "); Edit->addAction(chat); Window=new
QMenu(" Window "); Window->addAction(cancel); Help=new QMenu(" Help "); Help
->addAction(save); menuBar()->addMenu(File); // Add a menu item to the main window menuBar()->addMenu(Edit
); menuBar()->addMenu(Window); menuBar()->addMenu(Help); Tool1=new QToolBar(this
);// Add actions to the toolbar Tool1->addAction(open); Tool1->addAction(cancel); Tool2=new
QToolBar(this); Tool2->addAction(save); Tool2->addAction(chat); addToolBar(Qt::
TopToolBarArea,Tool1);// Add these two toolbars to the window addToolBar(Qt::TopToolBarArea,Tool2);
connect(open,SIGNAL(triggered()),this,SLOT(openclicked())); } class dialog:
public QDialog { public: QPushButton *button1; QPushButton *button2; QLineEdit *
lineidt; QLabel *label; QGridLayout *gridlayout; dialog()// Constructor { this
->setFixedSize(600,400); button1=new QPushButton("choose"); button2=new
QPushButton("quit"); label=new QLabel("input data"); lineidt=new QLineEdit("");
gridlayout=new QGridLayout(this); gridlayout->addWidget(label,0,0); gridlayout
->addWidget(lineidt,0,1); gridlayout->addWidget(button1,1,0); gridlayout
->addWidget(button2,1,1); connect(button2,SIGNAL(clicked()),this,SLOT(close()));
setLayout(gridlayout); } ~dialog() { } }; void MainWindow::openclicked() {
dialog a; a.exec(); } MainWindow::~MainWindow() { }

©2020 ioDraw All rights reserved
Self made whole person computer program PHP call shell command python Simple record of network programming layui.table Examples of dynamically getting header and list data Big data environment --- data warehouse (hive+mysql+hadoop) The construction of What are the types of variables ?MYSQL database DML Common commands 《 From machine learning to deep learning 》 note (2) Unsupervised learning log4j Method of printing exception stack information Android Development — Display food information according to customer budget