[gnome-tweak-tool] keymouse: Add description for Emacs Input tweak

[Jeremy Bicha <jbicha src gnome org>]

commit bfe31557e62accb4768f4fbbe022c9537ca830d3
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Sun Jun 11 13:45:39 2017 -0400

    keymouse: Add description for Emacs Input tweak
    
    https://raw.githubusercontent.com/gnome-design-team/gnome-mockups/master/tweak-tool/tweak-tool-wires.png
    
    https://bugzilla.gnome.org/show_bug.cgi?id=783176

 gtweak/tweaks/tweak_group_keymouse.py |    1 +
 gtweak/widgets.py                     |   28 +++++++++++++++++++++++++++-
 2 files changed, 28 insertions(+), 1 deletions(-)
---
diff --git a/gtweak/tweaks/tweak_group_keymouse.py b/gtweak/tweaks/tweak_group_keymouse.py
index 2b9fbb2..4a996f3 100644
--- a/gtweak/tweaks/tweak_group_keymouse.py
+++ b/gtweak/tweaks/tweak_group_keymouse.py
@@ -32,6 +32,7 @@ class KeyThemeSwitcher(GSettingsSwitchTweakValue):
                                            _("Emacs Input"),
                                            "org.gnome.desktop.interface",
                                            "gtk-key-theme",
+                                           desc=_("Overrides shortcuts to use keybindings from the Emacs 
editor."),
                                            **options)
 
     def get_active(self):
diff --git a/gtweak/widgets.py b/gtweak/widgets.py
index a94009f..dcb98cb 100644
--- a/gtweak/widgets.py
+++ b/gtweak/widgets.py
@@ -557,7 +557,33 @@ class GSettingsSwitchTweakValue(Gtk.Box, _GSettingsTweak):
         sw = Gtk.Switch()
         sw.set_active(self.get_active())
         sw.connect("notify::active", self._on_toggled)
-        build_label_beside_widget(name, sw, hbox=self)
+
+        vbox1 = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
+        vbox1.props.spacing = UI_BOX_SPACING
+        lbl = Gtk.Label(label=name)
+        lbl.props.ellipsize = Pango.EllipsizeMode.END
+        lbl.props.xalign = 0.0
+        vbox1.pack_start(lbl, True, True, 0)
+
+        if options.get("desc"):
+            description = options.get("desc")
+            lbl_desc = Gtk.Label()
+            lbl_desc.props.xalign = 0.0
+            lbl_desc.set_line_wrap(True)
+            lbl_desc.get_style_context().add_class("dim-label")
+            lbl_desc.set_markup("<span size='small'>"+GLib.markup_escape_text(description)+"</span>")
+            vbox1.pack_start(lbl_desc, True, True, 0)
+
+        vbox2 = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
+        vbox2_upper = Gtk.Box()
+        vbox2_lower = Gtk.Box()
+        vbox2.pack_start(vbox2_upper, True, True, 0)
+        vbox2.pack_start(sw, False, False, 0)
+        vbox2.pack_start(vbox2_lower, True, True, 0)
+
+        self.pack_start(vbox1, True, True, 0)
+        self.pack_start(vbox2, False, False, 0)
+        self.widget_for_size_group = None
 
     def _on_toggled(self, sw, pspec):
         self.set_active(sw.get_active())