Re: How to change GTK+3 label color dynamically

[Tilo Villwock <codemusings gmail com>]

Am Donnerstag, den 16.03.2017, 13:50 +0000 schrieb Rúben Rodrigues:
> I get this error:
>
> gtk-CRITICAL **: gtk_style_context_add_provider_for_screen:
> assertion 
> 'GDK_IS_SCREEN (screen)' failed
>
> COde: 
> gtk_style_context_add_provider_for_screen(gtk_widget_get_style_contex
> t(GTK_WIDGET(gtk_builder_get_object(builder,"window_Main"))),
>              GTK_STYLE_PROVIDER (css_provider),
>              G_MAXUINT);

Of course you do. The first argument is meant to be a GdkScreen object.
Which makes me wonder if you even read the documentation. Anyways, you
can obtain the object by invoking

    gdk_screen_get_default()

and the last argument is supposed to be a priority constant like

    GTK_STYLE_PROVIDER_PRIORITY_APPLICATION

Look them up. I'd also recommend installing devhelp and gtk3-docs if
you haven't already.

--Tilo