Re: Clip Region problem

--- In [email protected], "Igor Tandetnik" <itandetnik@...> wrote:
>
> todd <timza1221@...> wrote:
> > I"m trying to restore the previous clip region after modifying it to
> > draw.  What I'm doing is crashing for some unknown reason. Any
> > suggestions or improvements? 
> > THANKS!
> > Todd.
> > 
> > 
> > void drawing(CDC odc) // parameter set by caller hdc in window
> > {
> >  CRect r(1,1,10,10);    // Example rectangle to remove from drawing
> > 
> >  CRgn m_PrevRgn;       // PROBLEM? trying to restore previous RGN
> >  odc.GetClipRgn(m_PrevRgn);   // Read it, then restore it.
> 
> I'm too lazy to check, but I suspect m_PrevRgn has NULL region handle, whereas GetClipRgn requires a valid handle (which it makes to point to a different region). Try
> 
> CRgn m_PrevRgn;
> m_PrevRgn.CreateRectRgn(0, 0, 0, 0);
> odc.GetClipRgn(m_PrevRgn);
> 
> -- 
> Igor Tandetnik
>
NO the WTL GetClipRgn() does that.  I fixed my crash (was a leak) but the code does not work, so there's still some problem there.
Thanks, Todd.



------------------------------------

Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/wtl/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/wtl/join
    (Yahoo! ID required)

<*> To change settings via email:
    [email protected] 
    [email protected]

<*> To unsubscribe from this group, send an email to:
    [email protected]

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/