#include <QApplication>
#include <QPushButton>
int main(int argc, char *argv[]){
QApplication app(argc, argv);
QPushButton qPushButton("Hello Qt");
qPushButton.show();
return app.exec();
}
QT+=widgets
SOURCES += \
main.cpp
libGL error: core dri or dri2 extension not found
libGL error: failed to load driver: vboxvideo
 |
| example of QtQuick.Controls SpinBox |
import QtQuick 2.1
import QtQuick.Controls 1.0
import QtQuick.Window 2.0
ApplicationWindow {
title: qsTr("qteveloper.blogspot.com")
width: 400
height: 350
menuBar: MenuBar {
Menu {
title: qsTr("File")
MenuItem {
text: qsTr("Exit")
onTriggered: Qt.quit();
}
}
}
Column{
Label {
id: label
}
SpinBox{
id: spinbox1
width: 100
maximumValue: 100
minimumValue: 0
value: 50
onValueChanged: label.text = "spinbox1: " + value
}
SpinBox{
id: spinbox2
width: 100
maximumValue: 100
minimumValue: 0
value: 50
stepSize: 5
prefix: "prefix: "
onValueChanged: label.text = "spinbox2: " + value
}
SpinBox{
id: spinbox3
width: 100
maximumValue: 100
minimumValue: 0
value: 50
stepSize: 10
suffix: "-suffix"
onValueChanged: label.text = "spinbox3: " + value
}
}
}
 |
| QtQuick.Controls Slider |
import QtQuick 2.1
import QtQuick.Controls 1.0
import QtQuick.Window 2.0
ApplicationWindow {
title: qsTr("qteveloper.blogspot.com")
width: 400
height: 350
menuBar: MenuBar {
Menu {
title: qsTr("File")
MenuItem {
text: qsTr("Exit")
onTriggered: Qt.quit();
}
}
}
Column{
Label {
id: label
}
Slider{
id: slider1
maximumValue: 100
minimumValue: 0
value: 50
onValueChanged: label.text = "slider1: " + value
}
Slider{
id: slider2
maximumValue: 100
minimumValue: 0
value: 50
stepSize: 10
onValueChanged: label.text = "slider2: " + value
}
Slider{
id: slider3
maximumValue: 100
minimumValue: 0
value: 50
stepSize: 25
orientation: Qt.Vertical
onValueChanged: label.text = "slider3: " + value
}
}
}