pane: Add a GtkPane to the Window's grid

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

ui/pane.py

@@ -0,0 +1,25 @@
+# Copyright 2021 (c) Anna Schumaker.
+from lib import settings
+from gi.repository import Gtk
+
+Pane = Gtk.Paned.new(Gtk.Orientation.HORIZONTAL)
+
+def initialize():
+    settings.initialize("sidebar.width", 250)
+initialize()
+
+Pane.set_position(settings.get_int("sidebar.width"))
+Pane.set_vexpand(True)
+
+def on_change_position(pane, position):
+    settings.set("sidebar.width", pane.get_position())
+Pane.connect("notify::position", on_change_position)
+
+
+#
+# Create some dummy widgets so the pane actually shows up
+#
+Sidebar = Gtk.Label.new(str="Sidebar")
+Content = Gtk.Label.new(str="Content")
+Pane.set_start_child(Sidebar)
+Pane.set_end_child(Content)

ui/test_pane.py

@@ -0,0 +1,20 @@
+# Copyright 2021 (c) Anna Schumaker.
+from lib import settings
+from . import pane
+from gi.repository import Gtk
+import unittest
+
+class TestUIPane(unittest.TestCase):
+    def setUpClass():
+        pane.initialize()
+
+    def test_pane_init(self):
+        self.assertIsInstance(pane.Pane, Gtk.Paned)
+        self.assertTrue(pane.Pane.get_vexpand())
+
+        self.assertEqual(pane.Pane.get_position(), 250)
+        self.assertEqual(settings.get_int("sidebar.width"), 250)
+
+        pane.Pane.set_position(200)
+        self.assertEqual(pane.Pane.get_position(), 200)
+        self.assertEqual(settings.get_int("sidebar.width"), 200)

ui/test_window.py

@@ -3,6 +3,7 @@ from lib import settings
 from lib import version
 from . import window
 from . import header
+from . import pane
 from gi.repository import Gtk
 import unittest
 
@@ -21,6 +22,7 @@ class TestUIWindow(unittest.TestCase):
 
         self.assertEqual(window.Window.get_titlebar(), header.Header)
         self.assertEqual(window.Window.get_child(), window.Grid)
+        self.assertIn(pane.Pane, window.Grid)
         window.Window.present()
 
         self.assertEqual(window.Window.get_title(), version.string())

ui/window.py

@@ -5,6 +5,7 @@ import gi
 gi.require_version("Gtk", "4.0")
 from gi.repository import Gtk
 from . import header
+from . import pane
 
 Window = Gtk.ApplicationWindow()
 Grid = Gtk.Grid()
@@ -15,6 +16,8 @@ def initialize():
     settings.initialize("window.maximized", False)
 initialize()
 
+Grid.attach(pane.Pane, 0, 0, 4, 1)
+
 Window.set_title(version.string())
 Window.set_icon_name("emmental")
 Window.set_titlebar(header.Header)