Qt5/Qt-Creator 3-Widget Hello World Application

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Revision as of 11:13, 1 February 2014 by Thiebaut (talk | contribs)
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--D. Thiebaut (talk) 11:12, 1 February 2014 (EST)

Video



Project Files

[11:10:34] ~/Desktop/Dropbox/Qt/Project3Widgets$: for i in `ls -1`; do echo "= $i ="; echo "

"; cat $i; echo "


"; done

Project3Widgets.pro



#-------------------------------------------------
#
# Project created by QtCreator 2014-02-01T10:21:42
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = Project3Widgets
TEMPLATE = app


SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui


Project3Widgets.pro.user



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main.cpp



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

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}


mainwindow.cpp



#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{
    ui->textEdit->append( "Hello World!");
}


mainwindow.h



#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void on_pushButton_clicked();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H


mainwindow.ui



<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>664</width>
    <height>501</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Hello World!</string>
  </property>
  <widget class="QWidget" name="centralWidget">
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0">
     <layout class="QVBoxLayout" name="verticalLayout">
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout">
        <item>
         <spacer name="horizontalSpacer">
          <property name="orientation">
           <enum>Qt::Horizontal</enum>
          </property>
          <property name="sizeHint" stdset="0">
           <size>
            <width>40</width>
            <height>20</height>
           </size>
          </property>
         </spacer>
        </item>
        <item>
         <widget class="QPushButton" name="pushButton">
          <property name="text">
           <string>Hello</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QPushButton" name="pushButton_2">
          <property name="text">
           <string>Clear</string>
          </property>
         </widget>
        </item>
        <item>
         <spacer name="horizontalSpacer_2">
          <property name="orientation">
           <enum>Qt::Horizontal</enum>
          </property>
          <property name="sizeHint" stdset="0">
           <size>
            <width>40</width>
            <height>20</height>
           </size>
          </property>
         </spacer>
        </item>
       </layout>
      </item>
      <item>
       <widget class="QTextEdit" name="textEdit"/>
      </item>
     </layout>
    </item>
   </layout>
   <zorder>pushButton</zorder>
   <zorder>pushButton_2</zorder>
   <zorder>horizontalSpacer</zorder>
   <zorder>horizontalSpacer_2</zorder>
   <zorder>pushButton_2</zorder>
   <zorder>textEdit</zorder>
  </widget>
  <widget class="QMenuBar" name="menuBar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>664</width>
     <height>22</height>
    </rect>
   </property>
  </widget>
  <widget class="QToolBar" name="mainToolBar">
   <attribute name="toolBarArea">
    <enum>TopToolBarArea</enum>
   </attribute>
   <attribute name="toolBarBreak">
    <bool>false</bool>
   </attribute>
  </widget>
  <widget class="QStatusBar" name="statusBar"/>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections>
  <connection>
   <sender>pushButton_2</sender>
   <signal>clicked()</signal>
   <receiver>textEdit</receiver>
   <slot>clear()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>380</x>
     <y>64</y>
    </hint>
    <hint type="destinationlabel">
     <x>488</x>
     <y>111</y>
    </hint>
   </hints>
  </connection>
 </connections>
</ui>














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