void UpdateValueOnMouseMove(MouseMoveEvent evt)
 {
     if (dragging)
     {
         DeltaSpeed s = evt.shiftKey ? DeltaSpeed.Fast : (evt.altKey ? DeltaSpeed.Slow : DeltaSpeed.Normal);
         m_DrivenField.ApplyInputDeviceDelta(evt.mouseDelta, s, startValue);
     }
 }
 private void ProcessMoveEvent(bool shiftKey, bool altKey, Vector2 deltaPosition)
 {
     if (dragging)
     {
         DeltaSpeed s = shiftKey ? DeltaSpeed.Fast : (altKey ? DeltaSpeed.Slow : DeltaSpeed.Normal);
         m_DrivenField.ApplyInputDeviceDelta(deltaPosition, s, startValue);
     }
 }