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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
"""
This module defines Actions that can be done and undone on a state
"""
import gtk
from gettext import gettext as _
from sugar.graphics import icon
from . import addon
from .services import ObjectStore
from .properties import *
class Action(TPropContainer):
"""Base class for Actions"""
def __init__(self):
TPropContainer.__init__(self)
self.position = (0,0)
def do(self, **kwargs):
"""
Perform the action
"""
raise NotImplementedError("Not implemented")
def undo(self):
"""
Revert anything the action has changed
"""
pass #Should raise NotImplemented?
def enter_editmode(self, **kwargs):
"""
Enters edit mode. The action should display itself in some way,
without affecting the currently running application. The default is
a small box with the action icon.
"""
meta = addon.get_addon_meta(type(self).__name__)
self.__edit_img = icon.Icon(icon_name=meta['icon'],
icon_size=gtk.ICON_SIZE_LARGE_TOOLBAR)
## Eventbox create a visible window for the icon, so it clips correctly
#self.__edit_img = gtk.EventBox()
#self.__edit_img.set_visible_window(True)
#self.__edit_img.add(actionicon)
x, y = self.position
self._handle = ObjectStore().activity._overlayer.put(
self.__edit_img,
x, y,
draggable=True,
position_cb=self._update_position)
self.__edit_img.show_all()
def _update_position(self, x, y):
self.position = [int(x), int(y)]
def exit_editmode(self, **kwargs):
ObjectStore().activity._overlayer.remove(self._handle)
self.__edit_img.destroy()
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