Re: How to change GTK+3 label color dynamically

[Rúben Rodrigues <ruben_gr live com pt>]

Hi,

This is what i have, and don't works...


On 16-03-2017 11:20, Tilo Villwock wrote:
> Am Donnerstag, den 16.03.2017, 09:55 +0000 schrieb Rúben Rodrigues:
> > Hi,
> >
> > THanks. This is dynamically? I need in c language if possible :S
> Dynamic version:
>
> ...
>
> static GtkCssProvider* provider = NULL;
>
> static void
> set_label_color(GtkWidget* label, const char* color)
> {
>      const char* format = "label { color: %s; }";
>      size_t length = strlen(format) - 2 + 1;
>      char style[length];
>      sprintf(style, format, color);
>
>      if (provider == NULL) {
>          /* only create and add the provider the first time */
>          provider = gtk_css_provider_new();
>          gtk_style_context_add_provider(
>              gtk_widget_get_style_context(label),
>              GTK_STYLE_PROVIDER(provider),
>              GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
>          g_object_unref(provider);
>      }
>
>      gtk_css_provider_load_from_data(provider, style, -1, NULL);
> }
>
> ...
>
> This might not be ideal in all situations. Just make sure you don't
> create a new provider everytime you set a new color. Hope that helps.
>
> --Tilo