[gnome-font-viewer] Use suggested-action style class for the install button

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 9430074b450aefcb00e544a02719fde802706748
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Wed Feb 25 15:14:36 2015 -0600

    Use suggested-action style class for the install button

 src/font-view.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/font-view.c b/src/font-view.c
index 7add96d..3e251a3 100644
--- a/src/font-view.c
+++ b/src/font-view.c
@@ -287,19 +287,25 @@ install_button_refresh_appearance (FontViewApplication *self,
                                    GError *error)
 {
     FT_Face face;
+    GtkStyleContext *context;
+
+    context = gtk_widget_get_style_context (self->install_button);
 
     if (error != NULL) {
         gtk_button_set_label (GTK_BUTTON (self->install_button), _("Install Failed"));
         gtk_widget_set_sensitive (self->install_button, FALSE);
+        gtk_style_context_remove_class (context, "suggested-action");
     } else {
         face = sushi_font_widget_get_ft_face (SUSHI_FONT_WIDGET (self->font_widget));
 
         if (font_view_model_get_iter_for_face (FONT_VIEW_MODEL (self->model), face, NULL)) {
             gtk_button_set_label (GTK_BUTTON (self->install_button), _("Installed"));
             gtk_widget_set_sensitive (self->install_button, FALSE);
+            gtk_style_context_remove_class (context, "suggested-action");
         } else {
             gtk_button_set_label (GTK_BUTTON (self->install_button), _("Install"));
             gtk_widget_set_sensitive (self->install_button, TRUE);
+            gtk_style_context_add_class (context, "suggested-action");
         }
     }
 }