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# Copyright (C) 2009, Tutorius.org
#
# 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 time
import gobject
import gtk, gtk.gdk
from sugar.tutorius.actions import Action
from sugar.tutorius.properties import TUAMProperty
from sugar.tutorius.gtkutils import find_widget
from sugar import profile
# for easy profile access
xo_line_color = profile.get_color().get_stroke_color()
xo_fill_color = profile.get_color().get_fill_color()
class ChangeColor(Action):
"""
ChangeColorEvent
"""
widaddr = TUAMProperty("0")
def __init__(self, widaddr=None):
"""Constructor - Change a widget color
@param widaddr: the widget for which you want to change the color (UAM)
"""
Action.__init__(self)
if widaddr: self.widaddr = widaddr
self._old_color = None
self._new_color = None
self.tmp_color = None
self.wid = None
self._handler_id = None
def do(self, **kwargs):
"""
do.
Change the color of the widaddr widget with the chosen color
"""
if not "activity" in kwargs:
raise TypeError("activity argument is Mandatory")
# get widget instance
self.wid = find_widget(kwargs["activity"], self.widaddr)
if not self.wid:
# TODO: error
raise TypeError("widget not found")
# we have to get the initial color in the sugar rc theme
current_style = self.wid.rc_get_style()
self._old_color = current_style.bg[gtk.STATE_NORMAL]
# define new color
self._new_color = gtk.gdk.color_parse(xo_fill_color)
# set change color timeout (flash)
self.timeout = 500
self.tmp_color = self._old_color
self._handler_id = gobject.timeout_add(self.timeout, self._timeout_cb)
def undo(self):
"""
Go back to the original color
"""
if self._handler_id:
try:
#remove the timer
gobject.source_remove(self._handler_id)
except:
pass
# modify bg color (go back to original color)
self.wid.modify_bg(gtk.STATE_NORMAL, self._old_color)
def _timeout_cb(self):
"""
_timeout_cb triggers the eventfilter callback.
It is necessary because gobject timers only stop if the callback they
trigger returns False
"""
if self.tmp_color == self._old_color:
self.tmp_color = self._new_color
else:
self.tmp_color = self._old_color
# modify bg color
self.wid.modify_bg(gtk.STATE_NORMAL, self.tmp_color)
if self._handler_id:
try:
#remove the timer
gobject.source_remove(self._handler_id)
except:
pass
# TODO: reset
self._handler_id = gobject.timeout_add(self.timeout, self._timeout_cb)
__action__ = {
"name" : "ChangeColor",
"display_name" : "Change widget color",
"icon" : "message-bubble",
"class" : ChangeColor,
"mandatory_props" : ["widaddr"]
}
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