Handling gestures to show/hide the frame

We use SugarExt.GestureGrabber to listen for gestures
on the root window. Swiping from the frame area
towards the center does reveal the Frame.
Swiping towards one of the edges does hide the Frame.

This patch does depend on fe0022cd8f6a8fb94d379be287761cc3a6206086
in the toolkit-gtk3.

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

3 files changed, 152 insertions, 0 deletions

diff --git a/bin/sugar-session b/bin/sugar-session
index 1519a20..42e7beb 100755
--- a/bin/sugar-session
+++ b/bin/sugar-session
@@ -111,6 +111,12 @@ def setup_keyhandler_cb():
     from jarabe import frame
     keyhandler.setup(frame.get_view())
 
+def setup_gesturehandler_cb():
+    logging.debug('STARTUP: setup_gesturehandler_cb')
+    from jarabe.view import gesturehandler
+    from jarabe import frame
+    gesturehandler.setup(frame.get_view())
+
 def setup_journal_cb():
     logging.debug('STARTUP: setup_journal_cb')
     from jarabe.journal import journalactivity
@@ -210,6 +216,7 @@ def bootstrap():
 
     GObject.idle_add(setup_frame_cb)
     GObject.idle_add(setup_keyhandler_cb)
+    GObject.idle_add(setup_gesturehandler_cb)
     GObject.idle_add(setup_journal_cb)
     GObject.idle_add(setup_notification_service_cb)
     GObject.idle_add(setup_file_transfer_cb)
diff --git a/src/jarabe/view/Makefile.am b/src/jarabe/view/Makefile.am
index 630f184..1e8b0eb 100644
--- a/src/jarabe/view/Makefile.am
+++ b/src/jarabe/view/Makefile.am
@@ -4,6 +4,7 @@ sugar_PYTHON =				\
 	buddyicon.py			\
 	buddymenu.py			\
 	customizebundle.py		\
+	gesturehandler.py		\
 	keyhandler.py			\
 	launcher.py			\
 	palettes.py			\
diff --git a/src/jarabe/view/gesturehandler.py b/src/jarabe/view/gesturehandler.py
new file mode 100644
index 0000000..4084cdc
--- /dev/null
+++ b/src/jarabe/view/gesturehandler.py
@@ -0,0 +1,144 @@
+# Copyright (C) 2012 One Laptop Per Child
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+from gi.repository import Gdk
+
+from gi.repository import SugarExt
+from gi.repository import SugarGestures
+
+from sugar3.graphics import style
+
+_instance = None
+
+
+class GestureHandler(object):
+    '''Handling gestures to show/hide the frame
+
+    We use SugarExt.GestureGrabber to listen for
+    gestures on the root window. Swiping from
+    the frame area towards the center does reveal
+    the Frame. Swiping towards one of the edges
+    does hide the Frame.
+    '''
+
+    _HIDE = 0
+    _SHOW = 1
+
+    def __init__(self, frame):
+        self._frame = frame
+
+        self._gesture_grabber = SugarExt.GestureGrabber()
+
+        rectangle = self._create_rectangle(0, 0, Gdk.Screen.width(),
+                                           style.GRID_CELL_SIZE)
+        swipe = SugarGestures.SwipeController( \
+            directions=SugarGestures.SwipeDirectionFlags.DOWN)
+        swipe.connect('swipe-ended', self.__top_show_cb)
+        self._gesture_grabber.add(swipe, rectangle)
+
+        rectangle = self._create_rectangle(0, 0, Gdk.Screen.width(),
+                                           style.GRID_CELL_SIZE * 2)
+        swipe = SugarGestures.SwipeController( \
+            directions=SugarGestures.SwipeDirectionFlags.UP)
+        swipe.connect('swipe-ended', self.__top_hide_cb)
+        self._gesture_grabber.add(swipe, rectangle)
+
+        rectangle = self._create_rectangle( \
+            0, Gdk.Screen.height() - style.GRID_CELL_SIZE,
+            Gdk.Screen.width(), style.GRID_CELL_SIZE)
+        swipe = SugarGestures.SwipeController( \
+            directions=SugarGestures.SwipeDirectionFlags.UP)
+        swipe.connect('swipe-ended', self.__bottom_show_cb)
+        self._gesture_grabber.add(swipe, rectangle)
+
+        rectangle = self._create_rectangle( \
+            0, Gdk.Screen.height() - style.GRID_CELL_SIZE * 2,
+            Gdk.Screen.width(), style.GRID_CELL_SIZE * 2)
+        swipe = SugarGestures.SwipeController( \
+            directions=SugarGestures.SwipeDirectionFlags.DOWN)
+        swipe.connect('swipe-ended', self.__bottom_hide_cb)
+        self._gesture_grabber.add(swipe, rectangle)
+
+        rectangle = self._create_rectangle( \
+                0, 0, style.GRID_CELL_SIZE, Gdk.Screen.height())
+        swipe = SugarGestures.SwipeController( \
+            directions=SugarGestures.SwipeDirectionFlags.RIGHT)
+        swipe.connect('swipe-ended', self.__left_show_cb)
+        self._gesture_grabber.add(swipe, rectangle)
+
+        rectangle = self._create_rectangle( \
+                0, 0, style.GRID_CELL_SIZE * 2, Gdk.Screen.height())
+        swipe = SugarGestures.SwipeController( \
+            directions=SugarGestures.SwipeDirectionFlags.LEFT)
+        swipe.connect('swipe-ended', self.__left_hide_cb)
+        self._gesture_grabber.add(swipe, rectangle)
+
+        rectangle = self._create_rectangle( \
+                Gdk.Screen.width() - style.GRID_CELL_SIZE, 0,
+                style.GRID_CELL_SIZE, Gdk.Screen.height())
+        swipe = SugarGestures.SwipeController( \
+            directions=SugarGestures.SwipeDirectionFlags.LEFT)
+        swipe.connect('swipe-ended', self.__right_show_cb)
+        self._gesture_grabber.add(swipe, rectangle)
+
+        rectangle = self._create_rectangle( \
+                Gdk.Screen.width() - style.GRID_CELL_SIZE * 2, 0,
+                style.GRID_CELL_SIZE * 2, Gdk.Screen.height())
+        swipe = SugarGestures.SwipeController( \
+            directions=SugarGestures.SwipeDirectionFlags.RIGHT)
+        swipe.connect('swipe-ended', self.__right_hide_cb)
+        self._gesture_grabber.add(swipe, rectangle)
+
+    def _create_rectangle(self, x, y, width, height):
+        rect = Gdk.Rectangle()
+        rect.x = x
+        rect.y = y
+        rect.width = width
+        rect.height = height
+        return rect
+
+    def __top_show_cb(self, controller, event_direction):
+        self._frame.show()
+
+    def __top_hide_cb(self, controller, event_direction):
+        self._frame.hide()
+
+    def __bottom_show_cb(self, controller, event_direction):
+        self._frame.show()
+
+    def __bottom_hide_cb(self, controller, event_direction):
+        self._frame.hide()
+
+    def __left_show_cb(self, controller, event_direction):
+        self._frame.show()
+
+    def __left_hide_cb(self, controller, event_direction):
+        self._frame.hide()
+
+    def __right_show_cb(self, controller, event_direction):
+        self._frame.show()
+
+    def __right_hide_cb(self, controller, event_direction):
+        self._frame.hide()
+
+
+def setup(frame):
+    global _instance
+
+    if _instance:
+        del _instance
+
+    _instance = GestureHandler(frame)