Window: show unfullscreen button on button and touch events

We did track mouse motion events so far to show the unfullscreen
button. This adds the tracking of button events (left, middle, right
click) and touch tap.

Signed-off-by: Simon Schampijer <simon@laptop.org>
Acked-by: Manuel Quiñones <manuq@laptop.org>

src/sugar3/graphics/window.py

@@ -112,9 +112,12 @@ class Window(Gtk.Window):
         self.__vbox.pack_start(self.__hbox, True, True, 0)
         self.__hbox.show()
 
-        self.add_events(Gdk.EventMask.POINTER_MOTION_HINT_MASK
-                        | Gdk.EventMask.POINTER_MOTION_MASK)
+        self.add_events(Gdk.EventMask.POINTER_MOTION_HINT_MASK |
+                        Gdk.EventMask.POINTER_MOTION_MASK |
+                        Gdk.EventMask.BUTTON_RELEASE_MASK |
+                        Gdk.EventMask.TOUCH_MASK)
         self.connect('motion-notify-event', self.__motion_notify_cb)
+        self.connect('button-release-event', self.__button_press_event_cb)
 
         self.add(self.__vbox)
         self.__vbox.show()
@@ -264,21 +267,28 @@ class Window(Gtk.Window):
     def __unfullscreen_button_clicked(self, button):
         self.unfullscreen()
 
+    def __button_press_event_cb(self, widget, event):
+        self._show_unfullscreen_button()
+        return False
+
     def __motion_notify_cb(self, widget, event):
+        self._show_unfullscreen_button()
+        return False
+
+    def _show_unfullscreen_button(self):
         if self._is_fullscreen and self.props.enable_fullscreen_mode:
             if not self._unfullscreen_button.props.visible:
                 self._unfullscreen_button.show()
-            else:
-                # Reset the timer
-                if self._unfullscreen_button_timeout_id is not None:
-                    GObject.source_remove(self._unfullscreen_button_timeout_id)
-                    self._unfullscreen_button_timeout_id = None
-
-                self._unfullscreen_button_timeout_id = \
-                    GObject.timeout_add_seconds( \
-                        _UNFULLSCREEN_BUTTON_VISIBILITY_TIMEOUT, \
-                        self.__unfullscreen_button_timeout_cb)
-        return False
+
+            # Reset the timer
+            if self._unfullscreen_button_timeout_id is not None:
+                GObject.source_remove(self._unfullscreen_button_timeout_id)
+                self._unfullscreen_button_timeout_id = None
+
+            self._unfullscreen_button_timeout_id = \
+                GObject.timeout_add_seconds( \
+                    _UNFULLSCREEN_BUTTON_VISIBILITY_TIMEOUT, \
+                    self.__unfullscreen_button_timeout_cb)
 
     def __unfullscreen_button_timeout_cb(self):
         self._unfullscreen_button.hide()