[gimp] app: move updating the style editor to an idle function

[Michael Natterer <mitch src gnome org>]

commit f230019f7151cc5b317fc3b120c870c0b6246341
Author: Michael Natterer <mitch gimp org>
Date:   Tue Mar 2 11:46:58 2010 +0100

    app: move updating the style editor to an idle function
    
    so subsequent signals trigger only one update.

 app/widgets/gimptextstyleeditor.c |   26 ++++++++++++++++++++++++++
 app/widgets/gimptextstyleeditor.h |    2 ++
 2 files changed, 28 insertions(+), 0 deletions(-)
---
diff --git a/app/widgets/gimptextstyleeditor.c b/app/widgets/gimptextstyleeditor.c
index 5cd03bc..ed43cc0 100644
--- a/app/widgets/gimptextstyleeditor.c
+++ b/app/widgets/gimptextstyleeditor.c
@@ -80,6 +80,7 @@ static void      gimp_text_style_editor_tag_toggled  (GtkToggleButton     *toggl
                                                       GimpTextStyleEditor *editor);
 
 static void      gimp_text_style_editor_update       (GimpTextStyleEditor *editor);
+static gboolean  gimp_text_style_editor_update_idle  (GimpTextStyleEditor *editor);
 
 
 G_DEFINE_TYPE (GimpTextStyleEditor, gimp_text_style_editor,
@@ -247,6 +248,12 @@ gimp_text_style_editor_dispose (GObject *object)
                                             editor);
     }
 
+  if (editor->update_idle_id)
+    {
+      g_source_remove (editor->update_idle_id);
+      editor->update_idle_id = 0;
+    }
+
   G_OBJECT_CLASS (parent_class)->dispose (object);
 }
 
@@ -543,8 +550,25 @@ gimp_text_style_editor_set_font (GimpTextStyleEditor *editor,
 static void
 gimp_text_style_editor_update (GimpTextStyleEditor *editor)
 {
+  if (editor->update_idle_id)
+    g_source_remove (editor->update_idle_id);
+
+  editor->update_idle_id =
+    gdk_threads_add_idle ((GSourceFunc) gimp_text_style_editor_update_idle,
+                          editor);
+}
+
+static gboolean
+gimp_text_style_editor_update_idle (GimpTextStyleEditor *editor)
+{
   GtkTextBuffer *buffer = GTK_TEXT_BUFFER (editor->buffer);
 
+  if (editor->update_idle_id)
+    {
+      g_source_remove (editor->update_idle_id);
+      editor->update_idle_id = 0;
+    }
+
   if (gtk_text_buffer_get_has_selection (buffer))
     {
       GtkTextIter  start, end;
@@ -667,4 +691,6 @@ gimp_text_style_editor_update (GimpTextStyleEditor *editor)
       g_slist_free (tags_on);
       g_slist_free (tags_off);
     }
+
+  return FALSE;
 }
diff --git a/app/widgets/gimptextstyleeditor.h b/app/widgets/gimptextstyleeditor.h
index 602007d..98953ff 100644
--- a/app/widgets/gimptextstyleeditor.h
+++ b/app/widgets/gimptextstyleeditor.h
@@ -55,6 +55,8 @@ struct _GimpTextStyleEditor
   GtkWidget      *size_label;
 
   GList          *toggles;
+
+  guint           update_idle_id;
 };
 
 struct _GimpTextStyleEditorClass