playlist: Bind columns to a ListItemFactory

Gtk doesn't seem to provide a way to create a ListItem for testing, so I
skip testing this for now.

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

playlist/__init__.py

@@ -9,17 +9,18 @@ Selection = Gtk.SingleSelection()
 Selection.set_model(Model)
 
 View = Gtk.ColumnView()
+View.add_css_class("data-table")
 View.set_hexpand(True)
 View.set_model(Selection)
 
-View.append_column(column.Column("#"))
-View.append_column(column.Column("Title", width=250, expand=True))
-View.append_column(column.Column("Length"))
-View.append_column(column.Column("Artist", width=150))
-View.append_column(column.Column("Album", width=150))
-View.append_column(column.Column("Year"))
-View.append_column(column.Column("Count"))
-View.append_column(column.Column("Last Played", width=150))
+View.append_column(column.Column("#", "tracknumber"))
+View.append_column(column.Column("Title", "title", width=250, expand=True))
+View.append_column(column.Column("Length", "length", align=100))
+View.append_column(column.Column("Artist", "artist", width=150))
+View.append_column(column.Column("Album", "album", width=150))
+View.append_column(column.Column("Year", "year"))
+View.append_column(column.Column("Count", "playcount"))
+View.append_column(column.Column("Last Played", "lastplayed", width=150))
 
 Scroll = Gtk.ScrolledWindow()
 Scroll.set_child(View)

playlist/column.py

@@ -3,11 +3,20 @@ from lib import settings
 from gi.repository import Gtk
 
 class Column(Gtk.ColumnViewColumn):
-    def __init__(self, title, width=-1, expand=False):
+    def __init__(self, title, field, width=-1, expand=False, align=0):
         Gtk.ColumnViewColumn.__init__(self)
+        self.field = field
+        self.align = align
+
+        self.factory = Gtk.SignalListItemFactory()
+        self.factory.connect("bind", self.on_bind)
+        self.factory.connect("setup", self.on_setup)
+        self.factory.connect("teardown", self.on_teardown)
+        self.factory.connect("unbind", self.on_unbind)
 
         settings.initialize(f"column.{title}", width)
 
+        self.set_factory(self.factory)
         self.set_fixed_width(settings.get_int(f"column.{title}"))
         self.set_expand(expand)
         self.set_resizable(True)
@@ -16,3 +25,17 @@ class Column(Gtk.ColumnViewColumn):
 
     def on_width_changed(self, col, param):
         settings.set(f"column.{self.get_title()}", self.get_fixed_width())
+
+    def on_bind(self, factory, listitem):
+        track = listitem.get_item()
+        listitem.get_child().set_text(track[self.field])
+        listitem.get_child().set_xalign(self.align)
+
+    def on_setup(self, factory, listitem):
+        listitem.set_child(Gtk.Label())
+
+    def on_teardown(self, factory, listitem):
+        listitem.set_child(None)
+
+    def on_unbind(self, factory, listitem):
+        pass

playlist/test_column.py

@@ -9,18 +9,22 @@ class TestPlaylistColumn(unittest.TestCase):
         settings.reset()
 
     def test_playlist_column_init(self):
-        col = column.Column("Test")
+        col = column.Column("Test", "test")
         self.assertIsInstance(col, Gtk.ColumnViewColumn)
+        self.assertIsInstance(col.factory, Gtk.SignalListItemFactory)
 
         self.assertEqual(col.get_title(), "Test")
+        self.assertEqual(col.field, "test")
+        self.assertEqual(col.align, 0)
+        self.assertEqual(col.get_factory(), col.factory)
         self.assertTrue(col.get_resizable())
         self.assertFalse(col.get_expand())
 
-        col = column.Column("Test2", expand=True)
+        col = column.Column("Test2", "test", expand=True)
         self.assertTrue(col.get_expand())
 
     def test_playlist_column_width(self):
-        col = column.Column("Test", width=100)
+        col = column.Column("Test", "test", width=100)
 
         self.assertEqual(settings.get_int("column.Test"), 100)
         col.set_fixed_width(200)

test_playlist.py

@@ -30,6 +30,7 @@ class TestPlaylist(unittest.TestCase):
         self.assertEqual(playlist.Scroll.get_child(), playlist.View)
 
         self.assertTrue(playlist.View.get_hexpand())
+        self.assertTrue(playlist.View.has_css_class("data-table"))
 
         for (i, c) in enumerate(playlist.View.get_columns()):
             self.assertEqual(c.get_title(), columns[i].title)