Qt/Lesson 1

Hello, World! 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 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. pt:Qt/Primeiro programa pl:Programowanie_C%2B%2B_Qt4_w_systemie_Gnu-Linux/Helo_World_w_QT4