Re: Invisible GtkImage

[אנטולי קרס נר <fr33domlover mailoo org>]

Hey Kip,

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.

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.

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.

On ו', 2013-06-21 at 11:33 +0300, Anatoly Krasner wrote:
> ---------- Forwarded message ----------
> From: Kip Warner <kip thevertigo com>
> Date: Fri, Jun 21, 2013 at 4:10 AM
> Subject: Re: Invisible GtkImage
> To: אנטולי קרסנר <tombackton gmail com>
> Cc: gtk-app-devel-list <gtk-app-devel-list gnome org>
>
>
> On Thu, 2013-06-20 at 17:59 -0700, Kip Warner wrote:
> > On Wed, 2013-06-19 at 14:03 +0300, אנטולי קרסנר wrote:
> > > I have another idea for you: In the Gnome Mines game (which you
> can
> > > probably find on git.gnome.org) written in Vala, the game board
> has a
> > > fixed ratio and resizes with the window, exactly like your
> requirement.
> > > Go there and see how the MinefieldView and Window classes word.
> >
> > Hey Tom. So I'm looking through his gnome-mines.vala and I see in
> his
> > startup_custom_game_screen () function he is creating the
> GtkAspectFrame
> > as I do. I think the key difference is the child he is using is a
> > GtkGrid which already knows on how to resize inside of anything,
> whereas
> > the GtkImage does not.
> >
> > I'll keep looking through his code and fiddling with my own, but any
> > help appreciated.
>
>
> Ah hah. So I noticed something. When I set the shadow type to NONE in
> the AspectFrame, the recursive resizing stops. I can make the window
> larger, but not smaller. Hmm...
>
> --
> Kip Warner -- Software Engineer
> OpenPGP encrypted/signed mail preferred
> http://www.thevertigo.com