audio: Add widgets for audio Controls

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

audio/controls.py

@@ -0,0 +1,39 @@
+# Copyright 2021 (c) Anna Schumaker.
+from . import menu
+from gi.repository import Gtk, Gst
+
+class Controls(Gtk.Box):
+    def __init__(self):
+        Gtk.Box.__init__(self)
+        self.add_css_class("large-icons")
+        self.add_css_class("linked")
+
+        self.previous = Gtk.Button.new_from_icon_name("media-skip-backward")
+        self.append(self.previous)
+
+        self.play = Gtk.Button.new_from_icon_name("media-playback-start")
+        self.append(self.play)
+
+        self.pause = Gtk.Button.new_from_icon_name("media-playback-pause")
+        self.pause.hide()
+        self.append(self.pause)
+
+        self.next = Gtk.Button.new_from_icon_name("media-skip-forward")
+        self.append(self.next)
+
+        self.menu = menu.Button()
+        self.append(self.menu)
+
+        self.sizegroup = Gtk.SizeGroup()
+        self.sizegroup.add_widget(self)
+
+    def connect(self, name, func):
+        if name == "volume-changed":
+            self.menu.volume.connect("value-changed", func)
+        else:
+            button = self.__dict__.get(name)
+            button.connect("clicked", func)
+
+    def set_state(self, state):
+        self.play.set_visible(state != Gst.State.PLAYING)
+        self.pause.set_visible(state == Gst.State.PLAYING)

audio/test_controls.py

@@ -0,0 +1,50 @@
+# Copyright 2021 (c) Anna Schumaker.
+from . import controls
+from lib import settings
+from gi.repository import Gtk, Gst, GLib
+import unittest
+
+main_context = GLib.main_context_default()
+
+class TestControls(unittest.TestCase):
+    def test_controls_init(self):
+        ctrl = controls.Controls()
+
+        self.assertIsInstance(ctrl, Gtk.Box)
+        self.assertIsInstance(ctrl.previous, Gtk.Button)
+        self.assertIsInstance(ctrl.play, Gtk.Button)
+        self.assertIsInstance(ctrl.pause, Gtk.Button)
+        self.assertIsInstance(ctrl.next, Gtk.Button)
+        self.assertIsInstance(ctrl.menu, Gtk.MenuButton)
+        self.assertIsInstance(ctrl.sizegroup, Gtk.SizeGroup)
+
+        self.assertEqual(ctrl.get_orientation(), Gtk.Orientation.HORIZONTAL)
+        self.assertEqual(ctrl.previous.get_icon_name(), "media-skip-backward")
+        self.assertEqual(ctrl.play.get_icon_name(), "media-playback-start")
+        self.assertEqual(ctrl.pause.get_icon_name(), "media-playback-pause")
+        self.assertEqual(ctrl.next.get_icon_name(), "media-skip-forward")
+
+        self.assertTrue(ctrl.has_css_class("linked"))
+        self.assertTrue(ctrl.has_css_class("large-icons"))
+        self.assertTrue(ctrl.menu.has_css_class("normal-icons"))
+        self.assertFalse(ctrl.pause.is_visible())
+
+        self.assertIn(ctrl.previous, ctrl)
+        self.assertIn(ctrl.play, ctrl)
+        self.assertIn(ctrl.pause, ctrl)
+        self.assertIn(ctrl.next, ctrl)
+        self.assertIn(ctrl.menu, ctrl)
+        self.assertIn(ctrl, ctrl.sizegroup.get_widgets())
+
+    def test_controls_state(self):
+        ctrl = controls.Controls()
+        self.assertTrue(ctrl.play.is_visible())
+        self.assertFalse(ctrl.pause.is_visible())
+
+        ctrl.set_state(Gst.State.PLAYING)
+        self.assertFalse(ctrl.play.is_visible())
+        self.assertTrue(ctrl.pause.is_visible())
+
+        ctrl.set_state(Gst.State.READY)
+        self.assertTrue(ctrl.play.is_visible())
+        self.assertFalse(ctrl.pause.is_visible())