[gnome-maps/wip/mlundblad/touch-gestures: 2/2] mapView: WIP: implement swipe gesture to bring up the sidebar

[Marcus Lundblad <mlundblad src gnome org>]

commit 16b022358e1c1aa79566499cf534a6e5cdc1af67
Author: Marcus Lundblad <ml update uu se>
Date:   Thu Oct 19 23:54:16 2017 +0200

    mapView: WIP: implement swipe gesture to bring up the sidebar

 src/mapView.js |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/src/mapView.js b/src/mapView.js
index 363ae90..bceb3ec 100644
--- a/src/mapView.js
+++ b/src/mapView.js
@@ -24,6 +24,7 @@ const Clutter = imports.gi.Clutter;
 const GObject = imports.gi.GObject;
 const Geocode = imports.gi.GeocodeGlib;
 const Gio = imports.gi.Gio;
+const Gtk = imports.gi.Gtk;
 const GtkChamplain = imports.gi.GtkChamplain;
 const Lang = imports.lang;
 const Mainloop = imports.mainloop;
@@ -160,6 +161,7 @@ var MapView = new Lang.Class({
                                     this._updateUserLocation.bind(this));
         this._storeId = 0;
         this._connectRouteSignals();
+        this._initGestures();
     },
 
     _initScale: function(view) {
@@ -201,6 +203,21 @@ var MapView = new Lang.Class({
         return view;
     },
 
+    _initGestures: function() {
+        this._swipeGesture =
+            new Gtk.GestureSwipe({ widget: this, 'touch-only': true });
+        this._panGesture = new Gtk.GesturePan({ widget: this,
+                                                'touch-only': true,
+                                                orientation: Gtk.Orientation.HORIZONTAL });
+        // restrict to horizontal swiping by grouping with a horizontal pan
+        this._swipeGesture.group(this._panGesture);
+        this._swipeGesture.connect('swipe', this._onSwipe);
+    },
+
+    _onSwipe: function(gesture, velocityX, velocityY) {
+        Utils.debug('swipe: ' + velocityX + ', ' + velocityY);
+    },
+
     /* create and store a route layer, pass true to get a dashed line */
     _createRouteLayer: function(dashed, lineColor, width) {
         let red = Color.parseColor(lineColor, 0);