Qt/Lesson 1
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< Qt
Hello, World!
[edit | edit source]This is the Hello, World! program. It just displays a window:
#include <QApplication>
#include <QLabel>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QLabel label("Hello, world!");
label.show();
return app.exec();
}
To compile this, read Development Environment or just use g++ `pkg-config --libs --cflags Qt5Core Qt5Widgets` main.cpp
.
Using Qt designer
[edit | edit source]This lesson will get you started using Qt designer for making your own simple application.
Open Qt Designer and select to make a new dialog without buttons. Drag a label on to it and set its title property to "Hello, World!", then go to Form > Preview to see your new dialog. Now, onto writing some code. We'll have to subclass the QDialog class to make the application run standalone on most modern operating systems.