playlist: Create a sort Factory

For creating SortRows and handling their signals

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

playlist/sort.py

@@ -114,3 +114,56 @@ class SortRow(Gtk.Box):
 
     @GObject.Signal
     def move_down(self): pass
+
+
+class Factory(Gtk.SignalListItemFactory):
+    def __init__(self, model):
+        self.model = model
+        Gtk.SignalListItemFactory.__init__(self)
+        self.connect("setup", self.setup)
+        self.connect("bind", self.bind)
+        self.connect("unbind", self.unbind)
+        self.connect("teardown", self.teardown)
+
+    def setup(self, factory, listitem):
+        listitem.set_child(SortRow())
+
+    def bind(self, factory, listitem):
+        child = listitem.get_child()
+        child.set_item(listitem.get_item().get_string(),
+                       listitem.get_position(),
+                       self.model.get_n_enabled())
+        child.connect("switched", self.row_switched)
+        child.connect("reversed", self.row_reversed)
+        child.connect("move-up", self.move_row_up)
+        child.connect("move-down", self.move_row_down)
+
+    def unbind(self, factory, listitem):
+        child = listitem.get_child()
+        child.disconnect_by_func(self.row_switched)
+        child.disconnect_by_func(self.row_reversed)
+        child.disconnect_by_func(self.move_row_up)
+        child.disconnect_by_func(self.move_row_down)
+
+    def teardown(self, factory, listitem):
+        listitem.set_child(None)
+
+    def row_switched(self, row, enabled):
+        field = row.label.get_field()
+        if enabled:
+            self.model.enable(field)
+            index = self.model.get_enabled_model().get_index(field)
+        else:
+            index = self.model.get_enabled_model().get_index(field)
+            self.model.disable(field)
+        if index > 0:
+            self.model.emit("items-changed", index - 1, 1, 1)
+
+    def row_reversed(self, row):
+        self.model.get_enabled_model().reverse(row.label.get_field())
+
+    def move_row_up(self, row):
+        self.model.get_enabled_model().move_up(row.label.get_field())
+
+    def move_row_down(self, row):
+        self.model.get_enabled_model().move_down(row.label.get_field())

playlist/test_sort.py

@@ -1,6 +1,7 @@
 # Copyright 2021 (c) Anna Schumaker.
 import unittest
 from gi.repository import Gtk
+from . import model
 from . import sort
 
 class TestUpDownBox(unittest.TestCase):
@@ -194,3 +195,9 @@ class TestSortRow(unittest.TestCase):
 
         row.updown.emit("move-down")
         self.assertTrue(self.move_down)
+
+
+class TestFactory(unittest.TestCase):
+    def test_init(self):
+        factory = sort.Factory(model.FlatSortModel())
+        self.assertIsInstance(factory, Gtk.SignalListItemFactory)