MouseDragInfo
open class MouseDragInfo(val view: View, var dx: Double = 0.0, var dy: Double = 0.0, var start: Boolean = false, var end: Boolean = false, var startTime: DateTime = DateTime.EPOCH, var time: DateTime = DateTime.EPOCH, var sx: Double = 0.0, var sy: Double = 0.0, var cx: Double = 0.0, var cy: Double = 0.0)