Fallback to set_property when set_orientation does not exist

CellRendererProgress does not have set_orientation on GTK 2.0
And add same GTK 3.0 compatibility of ProgressBar fix to CellRendererProgress

issue6016
review25811002

tryton/client.py

@@ -63,6 +63,14 @@ if os.environ.get('GTK_VERSION', '2').startswith('3'):
         self.set_inverted(inverted)
     Gtk.ProgressBar.set_orientation = set_orientation
 
+    orig_set_orientation = Gtk.CellRendererProgress.set_orientation
+
+    def set_orientation(self, orientation):
+        orientation, inverted = orientation
+        orig_set_orientation(self, orientation)
+        self.set_property('inverted', inverted)
+    Gtk.CellRendererProgress.set_orientation = set_orientation
+
     orig_popup = Gtk.Menu.popup
 
     def popup(self, parent_menu_shell, parent_menu_item, func, button,

tryton/gui/window/view_form/view/list_gtk/widget.py

@@ -848,7 +848,10 @@ class ProgressBar(object):
         self.renderer = gtk.CellRendererProgress()
         orientation = self.orientations.get(self.attrs.get('orientation',
             'left_to_right'), gtk.PROGRESS_LEFT_TO_RIGHT)
-        self.renderer.set_orientation(orientation)
+        if hasattr(self.renderer, 'set_orientation'):
+            self.renderer.set_orientation(orientation)
+        else:
+            self.renderer.set_property('orientation', orientation)
         self.renderer.set_property('yalign', 0)
 
     @realized