Subj : Re: WM_PAINT or TWindow::Paint
To   : borland.public.cpp.borlandcpp
From : MarvinAvery
Date : Wed Aug 10 2005 01:08 pm


"Thomas Maeder [TeamB]" <maeder@glue.ch> wrote in message
news:m2pssmtj1c.fsf@madbox2.local...
> "MarvinAvery" <marvin.avery@hrdc-drhc.gc.ca> writes:
>
> The device context passed to the Paint() member function has a
> clipping region consisting of the invalidated rectangles.
>
> Apart from that, I think that it is compatible to the window dc or the
> client dc of the window. You could use one of these to write these
> lines to avoid clipping.
>
That is what I ended up doing. I tried to "expand" the clipping (update)
region using SelectClipRgn() inside my Paint() procedure but that always
seemed to make it smaller -- it looked like it took the intersection of the
current clip region with the specified region. I don't know why.

I then tried creating a new DC via GetDC and writing to it (as it would not
have a clip region). That worked!


> [BTW: This thread would be more on topic over in the owl newsgroup;
> didn't realize that when I first replied. It's probably too late for
> going there now, but please remember in future threads.]

This was a toss-up for me. I am using OWL but my questions were really
Windows so I posted to this newsgroup.

Thanks for your help.
Marvin

.