Re: [Gimp-developer] plugin development

[Michael Natterer <mitch gimp org>]

On Sun, 2017-12-31 at 15:17 +0100, p144a kabsi at wrote:
> Hi!
>
> I am developing a Gimp plugin in C and have a question, but if this
> is not
> the right place to ask, please tell me so and accept my apology.
>
> The plugin requires the user to select a color, but i can't figure
> out the
> correct way to do it. In lack of better knowledge i am using a field
> of
> type GimpRGB for the struct that holds the plugin options and the
> GimpParamDef in the query() function has an entry that looks like
> this:
>   {
>     GIMP_PDB_COLOR,
>     "inside color",
>     "Inside color"
>   }
>
> In the run() function i set the color field of the option like this:
>   options.inside_color = param[ PARAM_INSIDE_COLOR ].data.d_color;
>
> Again in lack of better knowledge, my function that builds the dialog
> for
> chosing options uses a GtkColorButton
> for the user to pick a color and i connect the signal "color_set" in
> the
> following way to a callback which is defined like this:
>
>   static void color_set( GtkColorButton *button, gpointer data ) {
>     gtk_color_button_get_color( button, data );
>   }
>
> and when building the dialog i connect it like this:
> g_signal_connect( color_button, "color_set", G_CALLBACK( color_set ),
> &options.inside_color );
>
> The gimptool compiles my plugin and it is registered and runs as
> expected
> in the Gimp.
>
> However, when building the dialog, i try to set the color that was
> stored
> in he options from a previous run like this:
>
>   gtk_color_button_set_color( ( GtkColorButton * ) color_button,
> &options.inside_color );
>
> the gimptool gives me a warning:
>   expected ‘const struct GdkColor *’ but argument is of type ‘struct
> GimpRGB *’
>
> When googling for help i read that GdkColor is deprecated?? and i
> want to
> ask you for the correct and preferred way of doing this.

You would simply use a GimpColorButton and gimp_color_button_new()

Regards,
Mitch