Re: [Java-gnome-developer] Transparent Window

[Rafael A. <fae...@gm...>]

Ok. Thanks

Try to find a solution by the gnome, I thought transset, maybe I get some
success.

Thanks again.

2010/2/18 Andrew Cowie <an...@op...>

> On Thu, 2010-02-18 at 19:33 -0300, Rafael Arcanjo wrote:
>
> >
> > Well I used the command AWTUtilities.setWindowOpacity (this, 0.5) and
> > gave as incompatible types.
>
>
> You can't mix toolkits.
>
> Two different libraries both trying to drive GTK will confuse the X
> server and crash your Java VM.
>
> If you're using java-gnome (and of course we hope you do!) to build the
> user interface layer for your application, then its native coverage of
> the GTK toolkit is all you need to use.
>
> > is there any way to get the transparent window?
>
> Yes...
>
> Transparency is a somewhat advanced topic; we don't tend to need it much
> in GNOME (and people are discouraged from trying to make fancy shaped
> windows that ignore the window manager).
>
> Coverage in java-gnome has been prototyped but is still experimental and
> not yet accepted for merging to 'mainline'.
>
> If you want to try it you'll need to learn how to build java-gnome from
> Bazaar. If the branch works for you, then perhaps you will consider
> helping us improve it to the point where it can be accepted into the
> next release.
>
>
> There are two parts:
>
>
> 1. Set backing pixmap to transparent:
>
>        screen = w.getScreen();
>        colormap = screen.getColormapRGBA();
>        w.setColormap(colormap);
>
>        w.realize();
>        underlying = w.getWindow();
>        underlying.setBackingPixmap(null, false);
>
> 2. Clear to background in Widget.ExposeEvent:
>
>        cr.setSource(1.0, 1.0, 1.0, 1.0);
>        cr.setOperator(Operator.CLEAR);
>        cr.paint();
>
>
> but as I said, it's still experimental and that API is not in a released
> version of the library, nor in 'mainline'.
>
> If you want to work on it, my branch is at
> 'hackers/andrew/cairo-transparency'. Come and chat with us in
> #java-gnome on irc.gimp.net and we can explore it further.
>
> Otherwise, at the moment,
>
> > is there any way to get the transparent window?
> >
> No, sorry.
>
> AfC
> Sydney
>
>
>
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