QT主窗体在屏幕居中显示

（转载）http://blog.csdn.net/xiexiaopingroma/article/details/5791515

 

#include <QtGui>

#include "mainwindow.h"



int main(int argc, char *argv[])

{

    QApplication a(argc, argv);



    QDesktopWidget* desktop = QApplication::desktop();

    int width = desktop->availableGeometry(-1).width();

    int height = desktop->availableGeometry(-1).height();



    MainWindow w;

    w.move((width - w.width()) / 2, (height - w.height()) / 2);

    w.show();



    return a.exec();

}