[gtk+] GtkLinkButton: Use :link and :visited for the label's color

[Benjamin Otte <otte src gnome org>]

commit 2ba33adf96d33f4b4efa127749d824b5beb0ff74
Author: Timm Bäder <mail baedert org>
Date:   Tue Oct 8 12:50:08 2013 +0200

    GtkLinkButton: Use :link and :visited for the label's color
    
    https://bugzilla.gnome.org/show_bug.cgi?id=709629

 gtk/gtklinkbutton.c |   71 ++++++++++-----------------------------------------
 1 files changed, 14 insertions(+), 57 deletions(-)
---
diff --git a/gtk/gtklinkbutton.c b/gtk/gtklinkbutton.c
index 9260b79..4abcb25 100644
--- a/gtk/gtklinkbutton.c
+++ b/gtk/gtklinkbutton.c
@@ -103,7 +103,6 @@ static gboolean gtk_link_button_button_press (GtkWidget        *widget,
                                              GdkEventButton   *event);
 static void     gtk_link_button_clicked      (GtkButton        *button);
 static gboolean gtk_link_button_popup_menu   (GtkWidget        *widget);
-static void     gtk_link_button_style_updated (GtkWidget        *widget);
 static void     gtk_link_button_unrealize    (GtkWidget        *widget);
 static gboolean gtk_link_button_enter_cb     (GtkWidget        *widget,
                                              GdkEventCrossing *event,
@@ -130,9 +129,6 @@ static const GtkTargetEntry link_drop_types[] = {
   { "_NETSCAPE_URL", 0, 0 }
 };
 
-static const GdkColor default_link_color = { 0, 0, 0, 0xeeee };
-static const GdkColor default_visited_link_color = { 0, 0x5555, 0x1a1a, 0x8b8b };
-
 static guint link_signals[LAST_SIGNAL] = { 0, };
 
 G_DEFINE_TYPE_WITH_PRIVATE (GtkLinkButton, gtk_link_button, GTK_TYPE_BUTTON)
@@ -151,7 +147,6 @@ gtk_link_button_class_init (GtkLinkButtonClass *klass)
   
   widget_class->button_press_event = gtk_link_button_button_press;
   widget_class->popup_menu = gtk_link_button_popup_menu;
-  widget_class->style_updated = gtk_link_button_style_updated;
   widget_class->unrealize = gtk_link_button_unrealize;
   
   container_class->add = gtk_link_button_add;
@@ -222,7 +217,8 @@ gtk_link_button_init (GtkLinkButton *link_button)
   link_button->priv = gtk_link_button_get_instance_private (link_button);
 
   gtk_button_set_relief (GTK_BUTTON (link_button), GTK_RELIEF_NONE);
-  
+  gtk_widget_set_state_flags (GTK_WIDGET (link_button), GTK_STATE_FLAG_LINK, FALSE);
+
   g_signal_connect (link_button, "enter-notify-event",
                    G_CALLBACK (gtk_link_button_enter_cb), NULL);
   g_signal_connect (link_button, "leave-notify-event",
@@ -233,7 +229,7 @@ gtk_link_button_init (GtkLinkButton *link_button)
   g_object_set (link_button, "has-tooltip", TRUE, NULL);
   g_signal_connect (link_button, "query-tooltip",
                     G_CALLBACK (gtk_link_button_query_tooltip_cb), NULL);
-  
+
   /* enable drag source */
   gtk_drag_source_set (GTK_WIDGET (link_button),
                       GDK_BUTTON1_MASK,
@@ -296,46 +292,6 @@ gtk_link_button_set_property (GObject      *object,
 }
 
 static void
-set_link_color (GtkLinkButton *link_button)
-{
-  GdkColor *link_color = NULL;
-  GtkWidget *label;
-  GdkRGBA rgba;
-
-  label = gtk_bin_get_child (GTK_BIN (link_button));
-  if (!GTK_IS_LABEL (label))
-    return;
-
-  if (link_button->priv->visited)
-    {
-      gtk_widget_style_get (GTK_WIDGET (link_button),
-                           "visited-link-color", &link_color, NULL);
-      if (!link_color)
-       link_color = (GdkColor *) &default_visited_link_color;
-    }
-  else
-    {
-      gtk_widget_style_get (GTK_WIDGET (link_button),
-                           "link-color", &link_color, NULL);
-      if (!link_color)
-       link_color = (GdkColor *) &default_link_color;
-    }
-
-  rgba.red = link_color->red / 65535.;
-  rgba.green = link_color->green / 65535.;
-  rgba.blue = link_color->blue / 65535.;
-  rgba.alpha = 1;
-  gtk_widget_override_color (label, GTK_STATE_FLAG_NORMAL, &rgba);
-  gtk_widget_override_color (label, GTK_STATE_FLAG_ACTIVE, &rgba);
-  gtk_widget_override_color (label, GTK_STATE_FLAG_PRELIGHT, &rgba);
-  gtk_widget_override_color (label, GTK_STATE_FLAG_SELECTED, &rgba);
-
-  if (link_color != &default_link_color &&
-      link_color != &default_visited_link_color)
-    gdk_color_free (link_color);
-}
-
-static void
 set_link_underline (GtkLinkButton *link_button)
 {
   GtkWidget *label;
@@ -362,19 +318,10 @@ gtk_link_button_add (GtkContainer *container,
 {
   GTK_CONTAINER_CLASS (gtk_link_button_parent_class)->add (container, widget);
 
-  set_link_color (GTK_LINK_BUTTON (container));
   set_link_underline (GTK_LINK_BUTTON (container));
 }
 
 static void
-gtk_link_button_style_updated (GtkWidget *widget)
-{
-  GTK_WIDGET_CLASS (gtk_link_button_parent_class)->style_updated (widget);
-
-  set_link_color (GTK_LINK_BUTTON (widget));
-}
-
-static void
 set_hand_cursor (GtkWidget *widget,
                 gboolean   show_hand)
 {
@@ -725,6 +672,7 @@ gtk_link_button_query_tooltip_cb (GtkWidget    *widget,
 }
 
 
+
 /**
  * gtk_link_button_set_uri:
  * @link_button: a #GtkLinkButton
@@ -795,7 +743,16 @@ gtk_link_button_set_visited (GtkLinkButton *link_button,
     {
       link_button->priv->visited = visited;
 
-      set_link_color (link_button);
+      if (visited)
+        {
+          gtk_widget_unset_state_flags (GTK_WIDGET (link_button), GTK_STATE_FLAG_LINK);
+          gtk_widget_set_state_flags (GTK_WIDGET (link_button), GTK_STATE_FLAG_VISITED, FALSE);
+        }
+      else
+        {
+          gtk_widget_unset_state_flags (GTK_WIDGET (link_button), GTK_STATE_FLAG_VISITED);
+          gtk_widget_set_state_flags (GTK_WIDGET (link_button), GTK_STATE_FLAG_LINK, FALSE);
+        }
 
       g_object_notify (G_OBJECT (link_button), "visited");
     }