Re: How to change GTK+3 label color dynamically

[Emmanuele Bassi <ebassi gmail com>]

You keep using an id in the selector, but you never show how you set
the id on the widget. I suspect you think the buildable ID you use
with GtkBuilder is also the ID used when theming — which is definitely
not the case. You will need gtk_widget_set_name(), instead. Of course,
that comes with its own set of caveats, most importantly: there's no
uniqueness of widget name enforced by GTK+ itself.

If you want to avoid all of this, use a CSS class; you can add a class
programmatically using gtk_style_context_add_class() or you can
specify the class in the GtkBuilder XML file.

Ciao,
 Emmanuele.


On 16 March 2017 at 12:49, Rúben Rodrigues <ruben_gr live com pt> wrote:
> I provide my code in previous emails.
>
> This is my code now:
>
> if(css_provider == NULL){
>          css_provider = gtk_css_provider_new();
>
>          gtk_style_context_add_provider
> (gtk_widget_get_style_context(GTK_WIDGET(gtk_builder_get_object(builder,"window_Main"))),
>                  GTK_STYLE_PROVIDER (css_provider),
>                  GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
>          g_object_unref(css_provider);
>
>      }
>      gtk_css_provider_load_from_data (css_provider,"#label_Sensors {
> color: red; }",-1,NULL);
>
>
> On 16-03-2017 12:41, Tilo Villwock wrote:
> > Am Donnerstag, den 16.03.2017, 11:58 +0000 schrieb Rúben Rodrigues:
> > > Hi,
> > >
> > > This is what i have, and don't works...
> > The code I provided works. What GTK3 version are you using? Also nobody
> > will be able to help you if you don't show us your code.
> >
> > --Tilo
>
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