def undo(self):
"""Updates the document as needed when undo() is invoked"""
# When called, this is always reversing a previous redo().
# Update the doc and send notifications.
assert self._move is None
if (self._x, self._y) == (self._x0, self._y0):
return
layer = self.doc.layer_stack.deepget(self._layer_path)
dx = self._x - self._x0
dy = self._y - self._y0
redraw_bboxes = layer.translate(-dx, -dy)
self._notify_canvas_observers(redraw_bboxes)
def undo(self):
"""Updates the document as needed when undo() is invoked"""
# When called, this is always reversing a previous redo().
# Update the doc and send notifications.
assert self._move is None
if (self._x, self._y) == (self._x0, self._y0):
return
layer = self.doc.layer_stack.deepget(self._layer_path)
dx = self._x - self._x0
dy = self._y - self._y0
redraw_bboxes = layer.translate(-dx, -dy)
self._notify_canvas_observers(redraw_bboxes)
def redo(self):
"""Updates the document as needed when do()/redo() is invoked"""
# The first time this is called, finish up the active move.
# Doc has already been updated, and notifications were sent.
if self._move is not None:
assert self._processing_complete
self._move.cleanup()
self._move = None
return
# Any second invocation is always reversing a previous undo().
# Need to do doc updates and send notifications this time.
if (self._x, self._y) == (self._x0, self._y0):
return
layer = self.doc.layer_stack.deepget(self._layer_path)
dx = self._x - self._x0
dy = self._y - self._y0
redraw_bboxes = layer.translate(dx, dy)
self._notify_canvas_observers(redraw_bboxes)
def redo(self):
"""Updates the document as needed when do()/redo() is invoked"""
# The first time this is called, finish up the active move.
# Doc has already been updated, and notifications were sent.
if self._move is not None:
assert self._processing_complete
self._move.cleanup()
self._move = None
return
# Any second invocation is always reversing a previous undo().
# Need to do doc updates and send notifications this time.
if (self._x, self._y) == (self._x0, self._y0):
return
layer = self.doc.layer_stack.deepget(self._layer_path)
dx = self._x - self._x0
dy = self._y - self._y0
redraw_bboxes = layer.translate(dx, dy)
self._notify_canvas_observers(redraw_bboxes)
