rind: Set a default image when there is no artwork

This acts as a placeholder, and keeps the sidebar from bouncing around
when tracks are changed.

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

emmental.ui

@@ -479,6 +479,7 @@ audio-volume-medium-symbolic</property>
                 </child>
                 <child>
                   <object class="GtkImage" id="album_artwork">
+                    <property name="visible">True</property>
                     <property name="can_focus">False</property>
                     <property name="icon_name">image-missing</property>
                     <property name="icon_size">5</property>
@@ -493,7 +494,8 @@ audio-volume-medium-symbolic</property>
                   </packing>
                 </child>
                 <child>
-                  <object class="GtkSeparator" id="artwork_separator">
+                  <object class="GtkSeparator">
+                    <property name="visible">True</property>
                     <property name="can_focus">False</property>
                   </object>
                   <packing>

rind/audio/artwork.py

@@ -1,15 +1,16 @@
 # Copyright 2019 (c) Anna Schumaker.
 from .. import gtk
-from gi.repository import GdkPixbuf
+from gi.repository import GdkPixbuf, Gtk
 
+Default   = Gtk.IconTheme.get_default().load_icon("applications-multimedia-symbolic", 512, 0)
 Image     = gtk.Builder.get_object("album_artwork")
 Paned     = gtk.Builder.get_object("sidebar_pane")
-Pixbuf    = None
-Separator = gtk.Builder.get_object("artwork_separator")
+Pixbuf    = Default
 
 def reset():
-    Image.hide()
-    Separator.hide()
+    global Pixbuf
+    Pixbuf = Default
+    set_scaled_image()
 
 def resize(*args):
     if Pixbuf != None:
@@ -23,10 +24,7 @@ def set_image(data):
     loader.write(data)
     Pixbuf = loader.get_pixbuf()
     loader.close()
-
     set_scaled_image()
-    Image.show()
-    Separator.show()
 
 def set_scaled_image():
     new_w = Paned.get_position()
@@ -34,3 +32,4 @@ def set_scaled_image():
     if new_h > 0:
         pix = Pixbuf.scale_simple(new_w, new_h, GdkPixbuf.InterpType.BILINEAR)
         Image.set_from_pixbuf(pix)
+set_scaled_image()

rind/audio/test_artwork.py

@@ -5,7 +5,7 @@ from . import widgets
 from .. import gtk
 import os
 import unittest
-from gi.repository import Gtk, Gst
+from gi.repository import GdkPixbuf, Gtk, Gst
 
 test_track = os.path.abspath("./trier/Test Album/01 - Test Track.ogg")
 
@@ -15,12 +15,11 @@ class TestAudioArtwork(unittest.TestCase):
         widgets.reset()
 
     def test_artwork_init(self):
+        self.assertIsInstance(artwork.Default,   GdkPixbuf.Pixbuf)
         self.assertIsInstance(artwork.Image,     Gtk.Image)
         self.assertIsInstance(artwork.Paned,     Gtk.Paned)
-        self.assertIsInstance(artwork.Separator, Gtk.Separator)
-        self.assertIsNone(artwork.Pixbuf)
-        self.assertFalse(artwork.Image.is_visible())
-        self.assertFalse(artwork.Separator.is_visible())
+        self.assertEqual(artwork.Pixbuf, artwork.Default)
+        self.assertTrue(artwork.Image.is_visible())
 
     def test_artwork_load(self):
         artwork.Paned.set_position(150)
@@ -28,7 +27,6 @@ class TestAudioArtwork(unittest.TestCase):
         gtk.main_loop(delay=0.1)
 
         self.assertTrue(artwork.Image.is_visible())
-        self.assertTrue(artwork.Separator.is_visible())
         self.assertEqual(artwork.Image.get_storage_type(), Gtk.ImageType.PIXBUF)
         self.assertEqual(artwork.Pixbuf.get_height(), 512)
         self.assertEqual(artwork.Pixbuf.get_width(),  512)
@@ -38,8 +36,7 @@ class TestAudioArtwork(unittest.TestCase):
         self.assertEqual(pbuf.get_width(),  150)
 
         playbin.set_uri(test_track)
-        self.assertFalse(artwork.Image.is_visible())
-        self.assertFalse(artwork.Separator.is_visible())
+        self.assertEqual(artwork.Pixbuf, artwork.Default)
 
     def test_artwork_resize(self):
         artwork.Paned.set_position(150)