[gnome-music/wip/jfelder/grilo-misc-cleanups: 3/7] grilo: Define tracker_plugin_available property

[Jean Felder <jfelder src gnome org>]

commit ceda092bfcf0ba21499859cdbd676839b2de8cd7
Author: Jean Felder <jfelder src gnome org>
Date:   Thu May 2 11:53:45 2019 +0200

    grilo: Define tracker_plugin_available property
    
    The views should not directly interact with the tracker plugin.

 gnomemusic/grilo.py          | 5 +++++
 gnomemusic/views/baseview.py | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/gnomemusic/grilo.py b/gnomemusic/grilo.py
index a424f45d..d83f056b 100644
--- a/gnomemusic/grilo.py
+++ b/gnomemusic/grilo.py
@@ -488,5 +488,10 @@ class Grilo(GObject.GObject):
         # queryable supported Grilo source.
         self._tracker_wrapper.local_songs_available(callback)
 
+    @GObject.Property(
+        type=bool, default=False, flags=GObject.ParamFlags.READABLE)
+    def tracker_plugin_available(self):
+        return self.tracker is not None
+
 
 grilo = Grilo()
diff --git a/gnomemusic/views/baseview.py b/gnomemusic/views/baseview.py
index c1794c9b..b821b422 100644
--- a/gnomemusic/views/baseview.py
+++ b/gnomemusic/views/baseview.py
@@ -98,7 +98,7 @@ class BaseView(Gtk.Stack):
             'selection-mode', self._window, 'selection-mode',
             GObject.BindingFlags.BIDIRECTIONAL)
 
-        if (grilo.tracker is not None
+        if (grilo.props.tracker_plugin_available
                 and not self._init):
             self._on_grilo_ready()