header: Add a header bar to the window

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

ui/header.py

@@ -0,0 +1,4 @@
+# Copyright 2021 (c) Anna Schumaker.
+from gi.repository import Gtk
+
+Header = Gtk.HeaderBar()

ui/test_header.py

@@ -0,0 +1,8 @@
+# Copyright 2021 (c) Anna Schumaker.
+from . import header
+from gi.repository import Gtk
+import unittest
+
+class TestHeader(unittest.TestCase):
+    def test_header_init(self):
+        self.assertIsInstance(header.Header, Gtk.HeaderBar)

ui/test_window.py

@@ -2,6 +2,7 @@
 from lib import settings
 from lib import version
 from . import window
+from . import header
 from gi.repository import Gtk
 import unittest
 
@@ -16,6 +17,8 @@ class TestUIWindow(unittest.TestCase):
 
     def test_window_init(self):
         self.assertIsInstance(window.Window, Gtk.ApplicationWindow)
+
+        self.assertEqual(window.Window.get_titlebar(), header.Header)
         window.Window.present()
 
         self.assertEqual(window.Window.get_title(), version.string())

ui/window.py

@@ -4,6 +4,7 @@ from lib import version
 import gi
 gi.require_version("Gtk", "4.0")
 from gi.repository import Gtk
+from . import header
 
 Window = Gtk.ApplicationWindow()
 
@@ -31,3 +32,9 @@ Window.connect("notify::default-height", on_change_height)
 def on_maximized(window, maximized):
     settings.set("window.maximized", window.is_maximized())
 Window.connect("notify::maximized", on_maximized)
+
+
+#
+# Set up the window's header bar
+#
+Window.set_titlebar(header.Header)