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# Copyright (C) 2008 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
import math
import gtk
import gobject
from sugar.graphics.icon import Icon, CanvasIcon
_INTERVAL = 100
_STEP = math.pi / 10 # must be a fraction of pi, for clean caching
class Pulser(object):
def __init__(self, icon):
self._pulse_hid = None
self._icon = icon
self._level = 0
self._phase = 0
def start(self, restart=False):
if restart:
self._phase = 0
if self._pulse_hid is None:
self._pulse_hid = gobject.timeout_add(_INTERVAL, self.__pulse_cb)
def stop(self):
if self._pulse_hid is not None:
gobject.source_remove(self._pulse_hid)
self._pulse_hid = None
self._icon.xo_color = self._icon.get_base_color()
def update(self):
if self._icon.get_pulsing():
base_color = self._icon.get_base_color()
pulse_color = self._icon.get_pulse_color()
base_stroke = self._get_as_rgba(base_color.get_stroke_color())
pulse_stroke = self._get_as_rgba(pulse_color.get_stroke_color())
base_fill = self._get_as_rgba(base_color.get_fill_color())
pulse_fill = self._get_as_rgba(pulse_color.get_fill_color())
self._icon.set_stroke_color(
self._get_color_string(base_stroke, pulse_stroke))
self._icon.set_fill_color(
self._get_color_string(base_fill, pulse_fill))
else:
self._icon.xo_color = self._icon.base_color
def _get_as_rgba(self, html_color):
if html_color == 'none':
return 1.0, 1.0, 1.0
else:
color = gtk.gdk.color_parse(html_color)
return color.red / 65535.0, \
color.green / 65535.0, \
color.blue / 65535.0
def _get_color_string(self, orig_color, target_color):
r = orig_color[0] + self._level * (target_color[0] - orig_color[0])
g = orig_color[1] + self._level * (target_color[1] - orig_color[1])
b = orig_color[2] + self._level * (target_color[2] - orig_color[2])
return '#%02x%02x%02x' % (int(r * 255), int(g * 255), int(b * 255))
def __pulse_cb(self):
self._phase += _STEP
self._level = (math.sin(self._phase) + 1) / 2
self.update()
return True
class PulsingIcon(Icon):
__gtype_name__ = 'SugarPulsingIcon'
def __init__(self, **kwargs):
self._pulser = Pulser(self)
self._base_color = None
self._pulse_color = None
self._paused = False
self._pulsing = False
Icon.__init__(self, **kwargs)
self._palette = None
self.connect('destroy', self.__destroy_cb)
def set_pulse_color(self, pulse_color):
self._pulse_color = pulse_color
self._pulser.update()
def get_pulse_color(self):
return self._pulse_color
pulse_color = gobject.property(
type=object, getter=get_pulse_color, setter=set_pulse_color)
def set_base_color(self, base_color):
self._base_color = base_color
self._pulser.update()
def get_base_color(self):
return self._base_color
base_color = gobject.property(
type=object, getter=get_base_color, setter=set_base_color)
def set_paused(self, paused):
self._paused = paused
if self._paused:
self._pulser.stop()
else:
self._pulser.start(restart=False)
def get_paused(self):
return self._paused
paused = gobject.property(
type=bool, default=False, getter=get_paused, setter=set_paused)
def set_pulsing(self, pulsing):
self._pulsing = pulsing
if self._pulsing:
self._pulser.start(restart=True)
else:
self._pulser.stop()
def get_pulsing(self):
return self._pulsing
pulsing = gobject.property(
type=bool, default=False, getter=get_pulsing, setter=set_pulsing)
def _get_palette(self):
return self._palette
def _set_palette(self, palette):
if self._palette is not None:
self._palette.props.invoker = None
self._palette = palette
palette = property(_get_palette, _set_palette)
def __destroy_cb(self, icon):
self._pulser.stop()
if self._palette is not None:
self._palette.destroy()
class CanvasPulsingIcon(CanvasIcon):
__gtype_name__ = 'SugarCanvasPulsingIcon'
def __init__(self, **kwargs):
self._pulser = Pulser(self)
self._base_color = None
self._pulse_color = None
self._paused = False
self._pulsing = False
CanvasIcon.__init__(self, **kwargs)
self.connect('destroy', self.__destroy_cb)
def __destroy_cb(self, box):
self._pulser.stop()
def set_pulse_color(self, pulse_color):
self._pulse_color = pulse_color
self._pulser.update()
def get_pulse_color(self):
return self._pulse_color
pulse_color = gobject.property(
type=object, getter=get_pulse_color, setter=set_pulse_color)
def set_base_color(self, base_color):
self._base_color = base_color
self._pulser.update()
def get_base_color(self):
return self._base_color
base_color = gobject.property(
type=object, getter=get_base_color, setter=set_base_color)
def set_paused(self, paused):
self._paused = paused
if self._paused:
self._pulser.stop()
elif self._pulsing:
self._pulser.start(restart=False)
def get_paused(self):
return self._paused
paused = gobject.property(
type=bool, default=False, getter=get_paused, setter=set_paused)
def set_pulsing(self, pulsing):
self._pulsing = pulsing
if self._paused:
return
if self._pulsing:
self._pulser.start(restart=True)
else:
self._pulser.stop()
def get_pulsing(self):
return self._pulsing
pulsing = gobject.property(
type=bool, default=False, getter=get_pulsing, setter=set_pulsing)
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