gtk: Create a LabelFactory

This is a Gtk.ListItemFactory that creates a Label widget and binds a
generic property to it.

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

tests/gtk/test_row.py

@@ -0,0 +1,47 @@
+# Copyright 2023 (c) Anna Schumaker.
+"""Tests our row widgets and factories."""
+import unittest
+import xfstestsdb.gtk.row
+from gi.repository import Gtk
+
+
+class TestLabelFactory(unittest.TestCase):
+    """Tests our Gtk.Factory to make Gtk.Labels."""
+
+    def setUp(self):
+        """Set up common variables."""
+        self.testcase = xfstestsdb.gtk.model.TestCase("test/case")
+        self.listitem = Gtk.ListItem()
+        self.listitem.get_item = unittest.mock.Mock(return_value=self.testcase)
+
+        self.factory = xfstestsdb.gtk.row.LabelFactory("name")
+
+    def test_init(self):
+        """Test that the factory was initialized correctly."""
+        self.assertIsInstance(self.factory, Gtk.SignalListItemFactory)
+        self.assertEqual(self.factory.property, "name")
+
+    def test_setup(self):
+        """Test that the factory implements the 'setup' signal."""
+        self.factory.emit("setup", self.listitem)
+        self.assertIsInstance(self.listitem.get_child(), Gtk.Label)
+        self.assertTrue(self.listitem.get_child().has_css_class("numeric"))
+
+    def test_bind(self):
+        """Test that the factory implements the 'bind' signal."""
+        self.factory.emit("setup", self.listitem)
+        self.factory.emit("bind", self.listitem)
+        self.assertEqual(self.listitem.get_child().get_text(), "test/case")
+
+    def test_unbind(self):
+        """Test that the factory implements the 'unbind' signal."""
+        self.factory.emit("setup", self.listitem)
+        self.factory.emit("bind", self.listitem)
+        self.factory.emit("unbind", self.listitem)
+        self.assertEqual(self.listitem.get_child().get_text(), "")
+
+    def test_teardown(self):
+        """Test that the factory implements the 'teardown' signal."""
+        self.factory.emit("setup", self.listitem)
+        self.factory.emit("teardown", self.listitem)
+        self.assertIsNone(self.listitem.get_child())

xfstestsdb/gtk/row.py

@@ -0,0 +1,38 @@
+# Copyright 2023 (c) Anna Schumaker.
+"""Our TestCase row widgets and factory."""
+import typing
+from gi.repository import GObject
+from gi.repository import Gtk
+
+
+class LabelFactory(Gtk.SignalListItemFactory):
+    """Create Gtk.Labels for each testcase."""
+
+    property = GObject.Property(type=str)
+
+    def __init__(self, property: str):
+        """Initialize our InscriptionFactory."""
+        super().__init__(property=property)
+        self.connect("setup", self.do_setup)
+        self.connect("bind", self.do_bind)
+        self.connect("unbind", self.do_unbind)
+        self.connect("teardown", self.do_teardown)
+
+    def do_setup(self, factory: typing.Self, listitem: Gtk.ListItem) -> None:
+        """Set up a ListItem child widget."""
+        listitem.set_child(Gtk.Label())
+        listitem.get_child().add_css_class("numeric")
+
+    def do_bind(self, factory: typing.Self, listitem: Gtk.ListItem) -> None:
+        """Bind a ListItem to the child widget."""
+        text = listitem.get_item().get_property(self.property)
+        listitem.get_child().set_text(text)
+
+    def do_unbind(self, factory: typing.Self, listitem: Gtk.ListItem) -> None:
+        """Unbind a ListItem from the child widget."""
+        listitem.get_child().set_text("")
+
+    def do_teardown(self, factory: typing.Self,
+                    listitem: Gtk.ListItem) -> None:
+        """Clean up a ListItem child widget."""
+        listitem.set_child(None)