[maemo-developers] hildon_color_button & custom colors issue

[From: Aniello Del Sorbo]

I reply to myself.
I was testing the app running it from a remote SSH (root) and not from the
user's Menu.

It works.
Thanks anyway.

Aniello

On Tue, Apr 15, 2008 at 5:50 PM, Aniello Del Sorbo <anidel at gmail.com> wrote:

> Hi,
>
> while porting Xournal to Maemo I decided to give it as much hildonization
> is possible.
> Base xournal uses only a bunch of predefined colors (something like 9 or
> 10 colors).
>
> I decided to use the hildon_color_button widget to give the user a much
> wide choice of colors.
> I get the GdkColor from the color button and have to convert it in RGBA
> because Xournal only works with those values
> (passing "fill-color-rgba" to the canvas items). It does this, I think,
> for being able to make a highlighter tool available in different colors
> (by making use of the alpha channel).
>
> anyway, I convert the GdkColor to RGBA using the macro:
>
> GdkColor *color; // read from the hildon_color widget
> guint alpha = 0xFF; // no transparency
>
> guint rgba = GNOME_CANVAS_COLOR_A  (color->red, color->green, color->blue,
> alpha)
>
> and then use it wherever it is needed.
>
> This works for the predefined colors in the color chooser dialog.
> But if I choose my own custom color it does not.
>
> If I use the GdkColor as is (thus passing "fill-color-gdk" to the canvas
> items), it works, but I can't use the alpha channel (can I ?).
> If I convert this custom color to RGBA with the given macro, it paints in
> a totally different color.
>
> Is this some issue with the colormap ?
> Is GNOME_CANVAS_COLOR_A not good for this ?
>
> Any other hints ?
>
> --
> anidel




-- 
anidel
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