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# Copyright (C) 2006-2007 Red Hat, Inc.
#
# 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
import gobject
from sugar.graphics.icon import CanvasIcon
class PulsingIcon(CanvasIcon):
__gproperties__ = {
'paused' : (bool, None, None, False,
gobject.PARAM_READWRITE),
'colors' : (object, None, None,
gobject.PARAM_READWRITE),
'pulse-time' : (float, None, None,
0.0, 500.0, 0.0,
gobject.PARAM_READWRITE),
}
def __init__(self, **kwargs):
self._paused = False
self._pulse_time = 0.0
self._colors = None
self._pulse_sid = 0
self._pos = 0
CanvasIcon.__init__(self, **kwargs)
def do_set_property(self, pspec, value):
CanvasIcon.do_set_property(self, pspec, value)
if pspec.name == 'pulse-time':
self._pulse_time = value
self._stop()
if not self._paused and self._pulse_time > 0.0:
self._start()
elif pspec.name == 'colors':
self._colors = value
self._pos = 0
self._update_colors()
elif pspec.name == 'paused':
self._paused = value
if not self._paused and self._pulse_time > 0.0:
self._start()
else:
self._stop()
def do_get_property(self, pspec):
CanvasIcon.do_get_property(self, pspec)
if pspec.name == 'pulse-time':
return self._pulse_time
elif pspec.name == 'colors':
return self._colors
def _update_colors(self):
self.props.stroke_color = self._colors[self._pos][0]
self.props.fill_color = self._colors[self._pos][1]
def _pulse_timeout(self):
if self._colors:
self._update_colors()
self._pos += 1
if self._pos == len(self._colors):
self._pos = 0
return True
def _start(self):
if self._pulse_sid == 0:
self._pulse_sid = gobject.timeout_add(
int(self._pulse_time * 1000), self._pulse_timeout)
def _stop(self):
if self._pulse_sid:
gobject.source_remove(self._pulse_sid)
self._pulse_sid = 0
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