[Qt-interest] paint one image over other continously

[Samuel Rødal]

Alessandro Portale wrote:
> Two possible solutions:
> 
> The first thing you may try is setting the Qt::WA_OpaquePaintEvent 
> attribute of the displaying widget
> See...
>     http://doc.qt.nokia.com/latest/qt.html#WidgetAttribute-enum
> ...and...
>     http://doc.qt.nokia.com/latest/qwidget.html#setAttribute
> That will avoid that the widget is cleared between to paint events.

You might need the Qt::WA_NoSystemBackground flag too, and possibly do 
setAutoFillBackground(false) on the widget to prevent Qt from 
overwriting the background in between the paint events.

--
Samuel