elementary-dev-community team mailing list archive

[Tom Beckmann <tomjonabc@xxxxxxxxx>]

The effect you observe is caused by the paint call at the bottom. Remove
that and it should work fine. But you also have to insert
ctx.set_operator(Cairo.Operator.CLEAR);
ctx.paint();
ctx.set_operator(Cairo.Operator.OVER);
at the very bottom of the draw method which clears the canvas. Clutter
doesn't do that for you.
On Apr 15, 2013 6:05 AM, "Craig" <weberc2@xxxxxxxxx> wrote:

> I posted this question on StackOverflow, but I'm hoping you guys can help
> answer it as well:
>
> I'm playing around with Clutter/cairo and I'm trying to draw a rectangle;
> however, it appears that theset_source_rgb is automatically painting the
> whole canvas with its source, regardless of whether or not I tell it to
> draw a rectangle (that is, even when I remove the ctx.rectangle() and
> ctx.fill()lines, the rectangle is still drawn). Why is this? And what do
> I need to do to have the rectangle do the painting rather than the
> set_source_rgb?
>
> The source can be found in the original SO question here:
> http://stackoverflow.com/questions/16007420/why-does-cairo-set-source-rgb-paint-the-whole-canvas
>
> Please advise, because I'm stumped!
>
> Thanks List!
> - Craig
>
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