Re: Invisible GtkImage

[Kip Warner <kip thevertigo com>]

On Fri, 2013-06-21 at 11:46 +0300, אנטולי קרסנר wrote:
> Hey Kip,

Hey Tom.

> You can try to place your image into a 1x1 GtkGrid and see if it works.
> If not... hmmm... I'm trying to think of an existing Gnome app which has
> scaling images. Hmmm... probably none. Scaling images (unless in
> Gimp/Inkspace) to containing widget size is probably rarely done.

Ok, I tried it with GtkGrid containing the image widget with the parent
of the former being the AspectFrame. No love. It behaves the same as
without it.

> Anyway, here's another idea: You can try to solve the recursive scaling
> problem by not using all the available space. Try to make the image fit,
> say 90% of the aspect frame. Then the image is not big enough to cause
> the aspect frame to rescale (which probably would cause the recursive
> scaling). You may get a little bit of screen space wasted, but if you
> don't mind the 10% (maybe you can reduce it to 5% or less) it's okay.

I think that's a good idea, but I'll try that as a last resort.

So I've almost got it working. It resizes properly when I make the
window larger, but the window's width can never be made smaller
(including after maximization).

  <http://pastebin.com/q76RJ4UH>

Can you see anything broken in that?

> Another idea: Image editing software usually uses a custom canvas and
> draws things on it, including scaled SVG images. Maybe you can put such
> a canvas in the aspect frame, possible also inside a 1x1 GtkGrid, and
> scale the image within the canvas. Then, the image scaling is just a
> canvas drawing operation and has no effect on the AspectFrame size, and
> shouldn't cause recursive scaling.

I don't know much about the canvas. But I'll try it and get back to you.

Thank you for your help,

-- 
Kip Warner -- Software Engineer
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http://www.thevertigo.com