[gnome-music/wip/mschraal/gtk-event-controller: 3/7] window: Use Gtk.EventController for back button



commit c2286f86c4a6860add890c9f436ac00f3e4213dd
Author: Marinus Schraal <mschraal gnome org>
Date:   Tue Aug 28 20:48:27 2018 +0200

    window: Use Gtk.EventController for back button

 gnomemusic/window.py | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)
---
diff --git a/gnomemusic/window.py b/gnomemusic/window.py
index aacfb9ed..c4e77d3b 100644
--- a/gnomemusic/window.py
+++ b/gnomemusic/window.py
@@ -217,6 +217,12 @@ class Window(Gtk.ApplicationWindow):
         self._key_press_event_id = self.connect(
             'key_press_event', self._on_key_press)
 
+        self._btn_ctrl = Gtk.GestureMultiPress().new(self)
+        self._btn_ctrl.props.propagation_phase = Gtk.PropagationPhase.CAPTURE
+        # Mouse button 8 is the back button.
+        self._btn_ctrl.props.button = 8
+        self._btn_ctrl.connect("pressed", self._on_back_button_pressed)
+
         # FIXME: In case Grilo is already initialized before the views
         # get created, they never receive a 'ready' signal to trigger
         # population. To fix this another check was added to baseview
@@ -389,15 +395,8 @@ class Window(Gtk.ApplicationWindow):
             self._searchbar.reveal(True)
 
     @log
-    def do_button_release_event(self, event):
-        """Override default button release event
-
-        :param Gdk.EventButton event: Button event
-        """
-        __, code = event.get_button()
-        # Mouse button 8 is the navigation button
-        if code == 8:
-            self._switch_back_from_childview()
+    def _on_back_button_pressed(self, gesture, n_press, x, y, data=None):
+        self.headerbar._on_back_button_clicked()
 
     @log
     def _notify_mode_disconnect(self, data=None):


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