[Qt-interest] QGraphicsView coordinates

[Rohan McGovern]

On Wednesday 17 December 2008, Phil wrote:

>
> What you say is absolutely true but how do I now specifically
> request that the painting takes place on the frame and not on
> main window?  QPainter (frame_name) compiles but nothing is
> painted and QPainter (this) paints on the main window.
>
> I know the following is a clue but but how do I force a painting
> event?
>
> "QPainter::begin: Widget painting can only begin as a result of a
> paintEvent"
>
> This is my paintEvent code:
>
> void Pest::paintEvent(QPaintEvent *)
> {
>   QPainter paint(mapFrame);
>
>   paintMap(&paint);  //this function draws the pixmap, draws a
> few points and draws text on the map.
> }
>

If you want to paint on mapFrame, which is a widget, do it from 
within mapFrame's paintEvent function.

-- 
Rohan McGovern
Qt Software, Nokia