[gnome-music/wip/rate-limit: 3/5] widgets: don't listen to row-changed always - we need them only when selection mode is on

[Vadim Rutkovsky <vrutkovsky src gnome org>]

commit b7bc4d361f7732ed87b7ca1197cf6fd51c9d18f6
Author: Vadim Rutkovsky <vrutkovs redhat com>
Date:   Tue Jun 16 17:40:14 2015 +0200

    widgets: don't listen to row-changed always - we need them only when selection mode is on

 gnomemusic/widgets.py |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/gnomemusic/widgets.py b/gnomemusic/widgets.py
index bffce41..ce3573b 100644
--- a/gnomemusic/widgets.py
+++ b/gnomemusic/widgets.py
@@ -388,7 +388,7 @@ class ArtistAlbums(Gtk.Box):
                                    GObject.TYPE_BOOLEAN,
                                    GObject.TYPE_INT
                                    )
-        self.model.connect('row-changed', self._model_row_changed)
+        self.row_changed_source_id = None
 
         self._hbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
         self._albumBox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL,
@@ -490,6 +490,13 @@ class ArtistAlbums(Gtk.Box):
         if self.selectionMode == selectionMode:
             return
         self.selectionMode = selectionMode
+        try:
+            if self.row_changed_source_id:
+                self.model.disconnect(self.row_changed_source_id)
+            self.row_changed_source_id = self.model.connect('row-changed', self._model_row_changed)
+        except Exception as e:
+            logger.warning("Exception while tracking row-changed: %s", e)
+
         for widget in self.widgets:
             widget.set_selection_mode(selectionMode)