fix load custom css for gtk3

src/main.c

@@ -38,10 +38,6 @@ static GtkWidget *dialog = NULL;
 
 static gint ret = YAD_RESPONSE_ESC;
 
-#if GTK_CHECK_VERSION(3,0,0)
-static GtkCssProvider *css = NULL;
-#endif
-
 YadNTabs *tabs;
 gint t_sem;
 
@@ -657,11 +653,6 @@ create_dialog (void)
     }
 #endif
 
-#if GTK_CHECK_VERSION(3,0,0)
-  if (css)
-    gtk_style_context_add_provider (gtk_widget_get_style_context (dlg), css, GTK_STYLE_PROVIDER_PRIORITY_USER);
-#endif
-
   return dlg;
 }
 
@@ -687,11 +678,6 @@ create_plug (void)
   if (box)
     gtk_container_add (GTK_CONTAINER (win), box);
 
-#if GTK_CHECK_VERSION(3,0,0)
-  if (css)
-    gtk_style_context_add_provider (gtk_widget_get_style_context (win), css, GTK_STYLE_PROVIDER_PRIORITY_USER);
-#endif
-
   gtk_widget_show_all (win);
 
   /* add plug data */
@@ -812,8 +798,11 @@ main (gint argc, gchar ** argv)
 #if !GTK_CHECK_VERSION(3,0,0)
       gtk_rc_parse (options.gtkrc_file);
 #else
-      css = gtk_css_provider_new ();
+      GtkCssProvider *css = gtk_css_provider_new ();
       gtk_css_provider_load_from_path (css, options.gtkrc_file, NULL);
+      gtk_style_context_add_provider_for_screen (gdk_screen_get_default (), GTK_STYLE_PROVIDER (css),
+                                                 GTK_STYLE_PROVIDER_PRIORITY_USER);
+      g_object_unref (css);
 #endif
     }