@param x MotionX @param y MotionY @return inspect whether the movement is a qualified pull event

Note that: The "fixedValue" can be meaningful when the "curtainGravity" is sure. Most of times,we need to change the other one when either of the two

@return The Status of CurtainView,can be OPENED or CLOSED

@return CurtainGravity describe the side of a CurtainView that to be fixed, which the optimize side is to be moved. For example, if you set CurtainGra

@return The minimum width or height that the CurtainView appears on screen.

@return The ceiling movement of a CurtainView.

@return The ReboundMode of CurtainView,which determines where the CurtainView move to when you lift your finger after certain movement.

@return The scroll duration that takes the CurtainView moving to destination when you lift your finger.

@return Can be the width or height of the CurtainView,depends on current CurtainGravity. And : fixedValue + maxFloatingValue = totalValue.

@return Whether the CurtainView is enabled to be pulled.

Note that: Bug occurs wen using some interpolator(eg: OvershootInterpolator) in follow situation: The fixedValue is small and the whole CurtainView ha