Re: Clip area of a canvas...

On Friday 07 February 2003 11:38 am, Alberto Narduzzi wrote:
> Hello...
>
> after a looong time reading, time has come for me to write something with
> Kylix. Wll, actually porting a project form Delphi 5 to Kylix 3 OE.
>
> Problem:
>
> under Windows I used to write something like the following, to set a
> clipping area on a tcanvas, so that nothing would be drawn outside the
> bounds:
>
> ClipRgn:=CreateRectRgn(FViewPortRect.Left, FViewPortRect.Top,
> FViewPortRect.Right+1, FViewPortRect.Bottom+1);
>
> SelectClipRgn(ImgScreen.Canvas.Handle, ClipRgn);
>
> but with Kylix such functions don't exist. So my question is: how do I
> "translate" the above code to gain the same result with Kylix? (provided I
> already tried to use some QTsomething... and QRegionH in place of HRGN with
> no results)
>

Hi,

I'm not sure I follow you;

Canvas.SetClipRect(Trect);

definitely exists....

The only caveat with GetClipRect and SetClipRect is that it is often necessary 
to lock the canvas before using them.

-- 
adam





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