How to make ListView moving at a constant speed?

[luosen]

Hello
I'm trying to make ListView moving at a constant speed with a flick operation.
However, the speed of flick isn't a constant.
View cann't move to the beginning/end position at most times.

Sample code:

   ListView {
   width : 100
   height: 200
   boundsBehavior: ListView.StopAtBounds
   flickDeceleration: 0
   model: 1000
   spacing : 2
   delegate: Rectangle{  width: 100; height: 18  }
   }

Thanks in advance
Luosen