Re: How to change GTK+3 label color dynamically

[Rúben Rodrigues <ruben_gr live com pt>]

No! This is the ID: https://ibin.co/3FlPSBGuokBB.png

and this is the widget name https://ibin.co/3FlPnPaDN7Zl.png that i used 
in css provider. This is not the problem because in start of the program 
i change the label to other color to understand if css provider is 
working. And works, but when i tried in the middle of the code change 
again with this code don't works..

How can i add a Css class? How it works? I tried insert style classes in 
glade, but the value that i write disappear.

Thanks


On 16-03-2017 13:19, Emmanuele Bassi wrote:
> 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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