void UpdateStateMomentum()
{
MoveScrollerPivot(m_DragInput.ScrollDelta);
bool switchToAnim = !m_DragInput.HasMomentum() || AdjustScrollToLimits();
if (switchToAnim)
{
m_ScrollMode = E_ScrollMode.Anim;
int stopItemIndex = GetNearestItem(m_DragInput.ScrollDelta.x);
m_CurrentItemIndex = Mathf.Clamp(stopItemIndex, 0, m_Items.Count - 1);
//Debug.Log("m_CurrentItemIndex is set to: " + m_CurrentItemIndex);
//z aktualni rychlosti a vzdalenosti vypocitej cas za jaky tam dorazime
float distToItem = Mathf.Abs(m_ScrollPivot.transform.localPosition.x + m_CurrentItemIndex * ItemOffset);
float curSpeed = Mathf.Max(m_DragInput.MoveSpeed, m_DragInput.MinSpeed);
float timeToScroll = distToItem / curSpeed;
//Debug.Log("Finishing anim - timeToScroll: " + timeToScroll + " dist: " + distToItem + " move speed: " + curSpeed);
//create transition anim
m_Transition = new Transition(m_ScrollPivot.transform.localPosition.x,
-(m_CurrentItemIndex * ItemOffset),
timeToScroll,
Tween.Easing.Quad.EaseOut);
}
}
void UpdateState()
{
//mode changes
//faze: 1) tahneme scroller -> touch begin
// 2) pustime ho ale jeste ma setrvacnost -> touch end
// 3) setrvacnost klesne pod urcitou hodnotu, doscroloujeme na nejblizsi item -> momentum klesne pod limit
// 4) ukonceni scrollu, dal jsme v klidu dokud znova nezacne opet 1) -> ukonceni transition
if (m_DragInput.IsDragging && Mathf.Abs(m_DragInput.ScrollDelta.x) > 0.0f /*&& !AdjustScrollToLimits()*/)
{
m_ScrollMode = E_ScrollMode.Drag;
m_Transition = null;
UpdateStateDrag();
}
else
{
switch (m_ScrollMode)
{
case E_ScrollMode.Idle:
UpdateStateIdle();
break;
case E_ScrollMode.Drag:
UpdateStateDrag();
break;
case E_ScrollMode.Momentum:
UpdateStateMomentum();
break;
case E_ScrollMode.Anim:
UpdateStateAnim();
break;
}
}
}
void UpdateStateIdle()
{
if (m_DragInput.IsDragging && Mathf.Abs(m_DragInput.ScrollDelta.x) > 0.0f)
{
m_ScrollMode = E_ScrollMode.Drag;
MoveScrollerPivot(m_DragInput.ScrollDelta);
}
}
void UpdateStateAnim()
{
Vector2 curPos = m_ScrollPivot.transform.localPosition;
curPos.x = m_Transition.GetTransition();
m_ScrollPivot.transform.localPosition = curPos;
m_ScrollPivot.SetModify(true);
if (m_Transition.IsDone())
{
m_Transition = null;
m_ScrollMode = E_ScrollMode.Idle;
if (m_OnSelectionChange != null)
{
m_OnSelectionChange(GetSelectedItem());
}
}
}
//Doscroluje k itemu na pozici index.
void SetSelectedItem(int index)
{
//reset scroll mode and remove transition
m_Transition = null;
m_ScrollMode = E_ScrollMode.Idle;
//Debug.Log("SetSelectedItem: " + index);
m_ScrollPivot.transform.localPosition = new Vector2(-index * ItemOffset, m_ScrollPivot.transform.localPosition.y);
//changed y value because value 0 broke layout in ResearchScroller_Layout
m_ScrollPivot.SetModify(true);
//store index of selected item
m_CurrentItemIndex = index;
//notify user
if (m_OnSelectionChange != null)
{
m_OnSelectionChange(GetSelectedItem());
}
}
void UpdateStateDrag()
{
if (m_DragInput.IsDragging && Mathf.Abs(m_DragInput.ScrollDelta.x) > 0.0f)
{
MoveScrollerPivot(m_DragInput.ScrollDelta);
if (AdjustScrollToLimits())
{
m_ScrollMode = E_ScrollMode.Anim;
int stopItemIndex = GetNearestItem(m_DragInput.ScrollDelta.x);
m_CurrentItemIndex = Mathf.Clamp(stopItemIndex, 0, m_Items.Count - 1);
m_Transition = new Transition(m_ScrollPivot.transform.localPosition.x,
-(m_CurrentItemIndex * ItemOffset),
0.35f,
Tween.Easing.Linear.EaseNone);
}
}
else
{
m_ScrollMode = E_ScrollMode.Momentum;
}
}
//Doscroluje k itemu na pozici index.
void ScrollToItem(int index)
{
if (m_CurrentItemIndex == index)
{
return;
}
//Debug.Log("ScrollToItem: " + index);
m_ScrollMode = E_ScrollMode.Anim;
//float distToItem = Mathf.Abs(m_ScrollPivot.transform.localPosition.x + index*ItemOffset);
int scrCnt = Mathf.Abs(m_CurrentItemIndex - index);
float scrollTime = 0.5f + (scrCnt - 1) * 0.15f;
//create transition anim
m_Transition = new Transition(m_ScrollPivot.transform.localPosition.x, -(index * ItemOffset), scrollTime, Tween.Easing.Sine.EaseInOut);
//store index of selected item
m_CurrentItemIndex = index;
//notify user by nemel byt potreba, k notifikaci by melo dojit na konci transition.
//if(m_OnSelectionChange != null)
// m_OnSelectionChange( GetSelectedItem() );
}
