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# 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)
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