factory: Give ListRows an "active" property

And style them so the row is highlighted and the text is bold.

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

emmental/emmental.css

@@ -20,3 +20,28 @@ box.emmental-splitbutton>menubutton>button {
 	margin-left: -1px;
 	padding: 6px;
 }
+
+listview > row:checked {
+	font-weight: bold;
+	background-color: alpha(@accent_color, 0.2);
+}
+
+listview > row:checked:hover {
+	background-color: alpha(@accent_color, 0.27);
+}
+
+listview > row:checked:active {
+	background-color: alpha(@accent_color, 0.36);
+}
+
+listview > row:checked:selected {
+	background-color: alpha(@accent_color, 0.3);
+}
+
+listview > row:checked:selected:hover {
+	background-color: alpha(@accent_color, 0.33);
+}
+
+listview > row:checked:selected:active {
+	background-color: alpha(@accent_color, 0.39);
+}

emmental/factory.py

@@ -22,6 +22,10 @@ class ListRow(GObject.GObject):
     def do_unbind(self) -> None:
         """Unbind the list item from the child widget."""
 
+    def bind_active(self, item_prop: str) -> None:
+        """Bind a property to the Row's active property."""
+        self.bind_and_set(self.item, item_prop, self, "active")
+
     def bind_and_set(self, src: GObject.GObject, src_prop: str,
                      dst: GObject.GObject, dst_prop: str,
                      bidirectional: bool = False,
@@ -54,6 +58,21 @@ class ListRow(GObject.GObject):
         self.bindings.clear()
         self.do_unbind()
 
+    @GObject.Property(type=bool, default=False)
+    def active(self) -> bool:
+        """Get the active state of this Row."""
+        if parent := self.listitem.get_child().get_parent():
+            return parent.get_state_flags() & Gtk.StateFlags.CHECKED
+        return False
+
+    @active.setter
+    def active(self, newval: bool) -> None:
+        if parent := self.listitem.get_child().get_parent():
+            if newval:
+                parent.set_state_flags(Gtk.StateFlags.CHECKED, False)
+            else:
+                parent.unset_state_flags(Gtk.StateFlags.CHECKED)
+
     @GObject.Property(type=Gtk.Widget)
     def child(self) -> Gtk.Widget | None:
         """Get the child widget displayed by this Row."""

tests/test_factory.py

@@ -30,12 +30,27 @@ class TestListRow(unittest.TestCase):
         self.assertEqual(self.row.listitem, self.listitem)
         self.assertEqual(self.row.child, self.listitem.get_child())
         self.assertEqual(self.row.item, self.item)
+        self.assertFalse(self.row.active)
 
     def test_bind(self):
         """Test calling bind() on the ListRow."""
         self.row.bind()
         self.row.do_bind.assert_called()
 
+    def test_bind_active(self):
+        """Test binding a property to the Row's active property."""
+        parent = Gtk.Box()
+        parent.append(self.row.child)
+
+        self.row.bind_active("sensitive")
+        self.assertEqual(len(self.row.bindings), 1)
+        self.assertTrue(parent.get_state_flags() & Gtk.StateFlags.CHECKED)
+        self.assertTrue(self.row.active)
+
+        self.item.set_sensitive(False)
+        self.assertFalse(parent.get_state_flags() & Gtk.StateFlags.CHECKED)
+        self.assertFalse(self.row.active)
+
     def test_bind_and_set_property(self):
         """Test the ListRow bind_property() function."""
         self.row.bind_and_set_property("label", "label")