[gnome-music: 3/11] Use libgd widgets instead of gtk+ if the later is too old

[Vadim Rutkovsky <vrutkovsky src gnome org>]

commit 1801174f821641f5e4901b726cf26505fdc7fc13
Author: Arnel A. Borja <arnelborja src gnome org>
Date:   Sat Aug 3 20:28:28 2013 +0800

    Use libgd widgets instead of gtk+ if the later is too old
    
    Import Stack, StackTransitionType and StackSwitcher from libgd if gtk+ is older
    than 3.9.

 gnomemusic/toolbar.py |    7 ++++++-
 gnomemusic/view.py    |   21 +++++++++++++--------
 gnomemusic/window.py  |    9 +++++++--
 3 files changed, 26 insertions(+), 11 deletions(-)
---
diff --git a/gnomemusic/toolbar.py b/gnomemusic/toolbar.py
index d301cb6..ee4f802 100644
--- a/gnomemusic/toolbar.py
+++ b/gnomemusic/toolbar.py
@@ -1,5 +1,10 @@
 from gi.repository import Gtk, GObject
 
+if Gtk.get_minor_version() > 8:
+    from gi.repository.Gtk import StackSwitcher
+else:
+    from gi.repository.Gd import StackSwitcher
+
 
 class ToolbarState:
     SINGLE = 0
@@ -18,7 +23,7 @@ class Toolbar(GObject.GObject):
 
     def __init__(self):
         GObject.GObject.__init__(self)
-        self._stack_switcher = Gtk.StackSwitcher(margin_top=2, margin_bottom=2)
+        self._stack_switcher = StackSwitcher(margin_top=2, margin_bottom=2)
         self._ui = Gtk.Builder()
         self._ui.add_from_resource('/org/gnome/Music/Headerbar.ui')
         self.header_bar = self._ui.get_object('header-bar')
diff --git a/gnomemusic/view.py b/gnomemusic/view.py
index dcedccc..3794c35 100644
--- a/gnomemusic/view.py
+++ b/gnomemusic/view.py
@@ -13,16 +13,21 @@ from gnomemusic.query import Query
 from gnomemusic.albumArtCache import AlbumArtCache as albumArtCache
 tracker = Tracker.SparqlConnection.get(None)
 
+if Gtk.get_minor_version() > 8:
+    from gi.repository.Gtk import Stack, StackTransitionType
+else:
+    from gi.repository.Gd import Stack, StackTransitionType
 
-class ViewContainer(Gtk.Stack):
+
+class ViewContainer(Stack):
     nowPlayingIconName = 'media-playback-start-symbolic'
     errorIconName = 'dialog-error-symbolic'
     starIconName = 'starred-symbolic'
     countQuery = None
 
     def __init__(self, title, header_bar, selection_toolbar, useStack=False):
-        Gtk.Stack.__init__(self,
-                           transition_type=Gtk.StackTransitionType.CROSSFADE)
+        Stack.__init__(self,
+                       transition_type=StackTransitionType.CROSSFADE)
         self._grid = Gtk.Grid(orientation=Gtk.Orientation.VERTICAL)
         self._iconWidth = -1
         self._iconHeight = 128
@@ -52,8 +57,8 @@ class ViewContainer(Gtk.Stack):
         box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
         box.pack_start(self.view, True, True, 0)
         if useStack:
-            self.stack = Gd.Stack(
-                transition_type=Gd.StackTransitionType.SLIDE_RIGHT,
+            self.stack = Stack(
+                transition_type=StackTransitionType.SLIDE_RIGHT,
             )
             dummy = Gtk.Frame(visible=False)
             self.stack.add_named(dummy, "dummy")
@@ -220,10 +225,10 @@ class ViewContainer(Gtk.Stack):
 
 
 #Class for the Empty View
-class Empty(Gtk.Stack):
+class Empty(Stack):
     def __init__(self, header_bar, player):
-        Gtk.Stack.__init__(self,
-                           transition_type=Gtk.StackTransitionType.CROSSFADE)
+        Stack.__init__(self,
+                       transition_type=StackTransitionType.CROSSFADE)
         builder = Gtk.Builder()
         builder.add_from_resource('/org/gnome/Music/NoMusic.ui')
         widget = builder.get_object('container')
diff --git a/gnomemusic/window.py b/gnomemusic/window.py
index 038df65..48566f3 100644
--- a/gnomemusic/window.py
+++ b/gnomemusic/window.py
@@ -8,6 +8,11 @@ import gnomemusic.view as Views
 
 tracker = Tracker.SparqlConnection.get(None)
 
+if Gtk.get_minor_version() > 8:
+    from gi.repository.Gtk import Stack, StackTransitionType
+else:
+    from gi.repository.Gd import Stack, StackTransitionType
+
 
 class Window(Gtk.ApplicationWindow):
     def __init__(self, app):
@@ -60,8 +65,8 @@ class Window(Gtk.ApplicationWindow):
         self.toolbar = Toolbar()
         self.set_titlebar(self.toolbar.header_bar)
         self.views = []
-        self._stack = Gtk.Stack(
-            transition_type=Gtk.StackTransitionType.CROSSFADE,
+        self._stack = Stack(
+            transition_type=StackTransitionType.CROSSFADE,
             transition_duration=100,
             visible=True)
         self._box.pack_start(self._stack, True, True, 0)