private IEnumerator <object> HandleDragTask(VelocityMeter velocityMeter, float mouseProjectedPosition, DragGesture dragGesture)
{
if (!CanScroll || !ScrollWhenContentFits && MaxScrollPosition == 0 || ScrollBySlider)
{
yield break;
}
// Do not block scrollview on refresh gesture
IsBeingRefreshed = false;
IsDragging = true;
float realScrollPosition = ScrollPosition;
wheelScrollState = WheelScrollState.Stop;
while (dragGesture.IsChanging())
{
var newMouseProjectedPosition = ProjectToScrollAxisWithFrameRotation(Input.MousePosition);
realScrollPosition += mouseProjectedPosition - newMouseProjectedPosition;
// Round scrolling position to prevent blurring
ScrollPosition = ClampScrollPositionWithinBounceZone(realScrollPosition).Round();
mouseProjectedPosition = newMouseProjectedPosition;
velocityMeter.AddSample(realScrollPosition);
yield return(null);
}
StartScrolling(InertialScrollingTask(velocityMeter.CalcVelocity()));
IsDragging = false;
}
private IEnumerator <object> MainTask()
{
if (firstUpdate)
{
if (CenterWhenContentFits && ContentFits)
{
ScrollPosition = MinScrollPosition;
}
firstUpdate = false;
}
while (true)
{
if (dragGesture.WasBegan())
{
StopScrolling();
}
else if (dragGesture.WasRecognized())
{
var velocityMeter = new VelocityMeter();
velocityMeter.AddSample(ScrollPosition);
yield return(HandleDragTask(velocityMeter, ProjectToScrollAxisWithFrameRotation(dragGesture.MousePressPosition), dragGesture));
}
else if (!dragGesture.IsRecognizing())
{
Bounce();
}
yield return(null);
}
}