header: Add a keyboard accelerator for toggling the sidebar

The user can press <Control>] to open and close the sidebar.

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

emmental/header/__init__.py

@@ -134,7 +134,9 @@ class Header(Gtk.HeaderBar):
                ActionEntry("increase-volume", self._volume.increment,
                            "<Shift><Control>Up"),
                ActionEntry("toggle-bg-mode", self._background.activate,
-                           "<Shift><Control>b")]
+                           "<Shift><Control>b"),
+               ActionEntry("toggle-sidebar", self._show_sidebar.activate,
+                           "<Control>bracketright")]
         if __debug__:
             res.append(ActionEntry("edit-settings", self._settings.activate,
                                    "<Shift><Control>s"))

tests/header/test_header.py

@@ -205,6 +205,8 @@ class TestHeader(tests.util.TestCase):
                     "<Shift><Control>Up"),
                    ("toggle-bg-mode", self.header._background.activate,
                     "<Shift><Control>b"),
+                   ("toggle-sidebar", self.header._show_sidebar.activate,
+                    "<Control>bracketright"),
                    ("edit-settings", self.header._settings.activate,
                     "<Shift><Control>s")]
 

tests/test_emmental.py

@@ -131,6 +131,7 @@ class TestEmmental(unittest.TestCase):
                               ("app.decrease-volume", "<Shift><Control>Down"),
                               ("app.increase-volume", "<Shift><Control>Up"),
                               ("app.toggle-bg-mode", "<Shift><Control>b"),
+                              ("app.toggle-sidebar", "<Control>bracketright"),
                               ("app.edit-settings", "<Shift><Control>s")]:
             self.assertEqual(self.application.get_accels_for_action(action),
                              [accel])