Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
QScreen class is OK but how can i detect my app shows on which screen number in multi display system ?
oh i solved my question, int QDesktopWidget::screenNumber(const QPoint & point) const