Draw your clipping rectangle path, call Clip, then set up and stroke your line:
cc = Gdk.CairoHelper.Create (drawingarea1.GdkWindow); cc.Rectangle (50,50,80,80); cc.Clip (); cc.Color = new Cairo.Color (0,0,0); cc.MoveTo (10,10); cc.LineTo (100, 100); cc.Stroke(); Jonathan On 11/17/2010 9:45 AM, Francisco M. Marzoa wrote: > Hello again, > > I want to draw something in a Cairo surface but when Stroking, just > paint the things that are within a given rectangle. > > I think I understand the theory: draw things into the source, then > create a rectangle for clipping into the mask, and finally stroke it to > the destination. > > The problem is that I do not know how to draw within the path, so I > cannot create that rectangle before stroking. > > For example: > > cc = Gdk.CairoHelper.Create (drawingarea1.GdkWindow); > cc.Color = new Cairo.Color (0,0,0); > cc.MoveTo (10,10); > cc.LineTo (100, 100); > cc.Rectangle (50,50,80,80); > cc.Stroke(); > > In this code the Rectangle which I want to use to cut the line, is drawn > also on source surface, not on mask as path. The concrete question is > then, how I can draw that rectangle as a path to clip the line? > > Thanks a lot in advance, > > > _______________________________________________ > Mono-list maillist - [email protected] > http://lists.ximian.com/mailman/listinfo/mono-list > > _______________________________________________ Mono-list maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-list
