public override void OnMouseUp(object sender, PInputEventArgs e)
{
newP = PUtil.CenterOfRectangle(target.Camera.ViewBounds);
colBarLayer.TranslateBy(0, (oldP.Y - newP.Y)
/ target.Layer.Scale);
rowBarLayer.TranslateBy((oldP.X - newP.X)
/ target.Layer.Scale, 0);
}