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# Copyright (C) 2008 Jimmy Do <jimmydo@users.sourceforge.net>
#
# 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 time
import gobject
import gtk
class PulseButton(gtk.Button):
def __init__(self):
super(PulseButton, self).__init__()
self._anim_period_seconds = 0.7
self._start_time = 0.0
self._factor = 0.0
def start_pulsing(self):
self._start_time = time.time()
gobject.timeout_add(10, self._on_timeout)
def stop_pulsing(self):
self._start_time = 0
def _on_timeout(self, data=None):
if self._start_time <= 0.0:
return False
if self.window != None:
delta = time.time() - self._start_time
if delta > self._anim_period_seconds:
delta = self._anim_period_seconds
self._start_time = time.time()
fraction = delta/self._anim_period_seconds
self._factor = math.sin(fraction * math.pi)
self.window.invalidate_rect(self.allocation, True)
return True
def do_expose_event(self, event):
gtk.Button.do_expose_event(self, event)
if self._start_time > 0:
context = event.window.cairo_create()
context.rectangle(0, 0, self.allocation.width, self.allocation.height)
#color = self.style.bg[gtk.STATE_SELECTED]
#color = gtk.gdk.Color(65535, 65535, 65535)
color = gtk.gdk.Color(0, 0, 0)
red = color.red / 65535.0
green = color.green / 65535.0
blue = color.blue / 65535.0
context.set_source_rgba(red, green, blue, self._factor * 0.8)
context.fill()
return False
gobject.type_register(PulseButton)
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