public void MoveByWithHistory(decimal dx, decimal dy, IHistory history)
{
var previous = new { DeltaX = -dx, DeltaY = -dy, Shape };
var next = new { DeltaX = dx, DeltaY = dy, Shape };
history.Snapshot(previous, next, (s) => s.Shape.Move(null, s.DeltaX, s.DeltaY));
Shape.Move(null, dx, dy);
}
private static void MoveShapeByWithHistory(IBaseShape shape, double dx, double dy, IHistory history)
{
var previous = new { DeltaX = -dx, DeltaY = -dy, shape };
var next = new { DeltaX = dx, DeltaY = dy, shape };
history.Snapshot(previous, next, (s) => s.shape.Move(null, s.DeltaX, s.DeltaY));
shape.Move(null, dx, dy);
}