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import gobject
from sugar.scene.Transformation import Transformation
class Actor(gobject.GObject):
__gsignals__ = {
'changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ())
}
def __init__(self):
gobject.GObject.__init__(self)
self._parent = None
self._x = 0
self._y = 0
self._width = -1
self._height = -1
self._transf = Transformation()
def set_position(self, x, y):
self._x = x
self._y = y
self.notify_changed()
def _get_parents(self):
parents = []
parent = self._parent
while parent:
parents.insert(0, parent)
parent = parent._parent
return parents
def _get_abs_position(self, x, y):
transf = None
parents = self._get_parents()
for actor in parents:
if transf:
transf = transf.compose(actor._transf)
else:
transf = actor._transf
return transf.get_position(x, y)
def notify_changed(self):
if self._parent:
self._parent.notify_changed()
else:
self.emit('changed')
def set_size(self, width, height):
self._width = width
self._height = height
self.notify_changed()
def render(self, drawable):
pass
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