The content is drawn into the surface and blitted to the screen.
The param "true" indicates the creation of the drawing surfaces.
This function redraws the widget (by calling eventDraw()) and calls Update(true) if doUpdate = true.Redraw(bool doUpdate);
This calls Blit() and updates the screen.Update(bool doBlit);
This function blits the widget surface to the screen and calls eventBlit() that can be used for custom blit behaviour.Blit();
The content of the widget is directly blitted to the screen.
This calls Blit() and updates the screen.Update(bool doBlit);
This function blits the widget content directly to the screen by calling eventBlit().Blit();