knowing mouse location

[riarioriu3]

how to know that mouse cursor is above one of the item (like pushbutton / lineedit) ?

[Ali Reza]

by QCursor::pos() , you can locate cursor position in global screen.

[wysota]

how to know that mouse cursor is above one of the item (like pushbutton / lineedit) ?

It depends what you need this information for. The most general way is to handle enter and leave events for the widget (see QWidget::enterEvent()). Using QCursor::pos() is definitely not a good approach.