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# Copyright (C) 2006, Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
import random
import hippo
import gtk
from sugar.graphics import units
_CELL_WIDTH = units.grid_to_pixels(1)
_CELL_HEIGHT = units.grid_to_pixels(1)
_GRID_WIDTH = gtk.gdk.screen_width() / _CELL_WIDTH
_GRID_HEIGHT = gtk.gdk.screen_height() / _CELL_HEIGHT
class SpreadBox(hippo.CanvasBox):
def __init__(self, **kwargs):
hippo.CanvasBox.__init__(self, **kwargs)
self._grid = []
for i in range(0, _GRID_WIDTH * _GRID_HEIGHT):
self._grid.append(None)
def add_item(self, item):
start_pos = int(random.random() * len(self._grid))
pos = start_pos
while self._grid[pos] != None:
pos = pos + 1
if pos == len(self._grid):
pos = 0
elif pos == start_pos:
break
self._grid[pos] = item
self.append(item, hippo.PACK_FIXED)
cell_y = int(pos / _GRID_WIDTH)
cell_x = pos - cell_y * _GRID_WIDTH
self.set_position(item, cell_x * _CELL_WIDTH, cell_y * _CELL_HEIGHT)
def remove_item(self, item):
for i in range(0, len(self._grid)):
if self._grid[i] == item:
self._grid[i] = None
self.remove(item)
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