[gnome-music/wip/jfelder/simplify-playlistdialog: 25/28] playlistdialog: Do not show stack at init

[Jean Felder <jfelder src gnome org>]

commit 606fabb2f51459b1ccc00366fe55e4268f29a5b3
Author: Jean Felder <jfelder src gnome org>
Date:   Tue Mar 13 17:46:57 2018 +0100

    playlistdialog: Do not show stack at init
    
    This is to avoid some strange flickerings when the dialog appears.

 data/PlaylistDialog.ui               | 4 ++--
 gnomemusic/widgets/playlistdialog.py | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/data/PlaylistDialog.ui b/data/PlaylistDialog.ui
index f20de813..53db2e9c 100644
--- a/data/PlaylistDialog.ui
+++ b/data/PlaylistDialog.ui
@@ -32,7 +32,7 @@
             <property name="transition_duration">250</property>
             <child>
               <object class="GtkBox" id="empty_state">
-                <property name="visible">True</property>
+                <property name="visible">False</property>
                 <property name="can_focus">False</property>
                 <property name="orientation">vertical</property>
                 <child>
@@ -132,7 +132,7 @@
             </child>
             <child>
               <object class="GtkBox" id="normal_state">
-                <property name="visible">True</property>
+                <property name="visible">False</property>
                 <property name="can_focus">False</property>
                 <property name="orientation">vertical</property>
                 <child>
diff --git a/gnomemusic/widgets/playlistdialog.py b/gnomemusic/widgets/playlistdialog.py
index 8300fd29..fe5d5b16 100644
--- a/gnomemusic/widgets/playlistdialog.py
+++ b/gnomemusic/widgets/playlistdialog.py
@@ -85,12 +85,14 @@ class PlaylistDialog():
 
         def playlists_available_cb(available):
             if available:
+                self._normal_state.show()
                 self._add_playlist_stack.set_visible_child(self._normal_state)
                 self._new_playlist_button = self._ui.get_object(
                     'new-playlist-button')
                 self._new_playlist_entry = self._ui.get_object(
                     'new-playlist-entry')
             else:
+                self._empty_state.show()
                 self._add_playlist_stack.set_visible_child(self._empty_state)
                 self._new_playlist_button = self._ui.get_object(
                     'create-first-playlist-button')