public void SetSelectedTrans(Transform trans)
{
if (trans == null)
{
return;
}
_seletedTrans = trans;
_scrollState = EScrollState.ESS_Decelerate;
}
public void StartScroll()
{
_scrollState = EScrollState.ESS_Scroll;
bRunLateUpdated = true;
//resort child sibling
foreach (var obj in siblingIndex)
{
obj.Key.SetSiblingIndex(obj.Value);
}
}
protected virtual void LateUpdate()
{
if (!m_Content || !bRunLateUpdated)
{
return;
}
EnsureLayoutHasRebuilt();
UpdateBounds();
float deltaTime = Time.smoothDeltaTime;
Vector2 offset = CalculateOffset(Vector2.zero);
if ((offset != Vector2.zero || m_Velocity != Vector2.zero) && (_scrollState == EScrollState.ESS_Scroll || _scrollState == EScrollState.ESS_Decelerate))
{
Vector2 position = m_Content.anchoredPosition;
for (int axis = 0; axis < 2; axis++)
{
// Apply spring physics if movement is elastic and content has an offset from the view.
if (m_MovementType == MovementType.Elastic && offset[axis] != 0)
{
float speed = m_Velocity[axis];
position[axis] = Mathf.SmoothDamp(m_Content.anchoredPosition[axis], m_Content.anchoredPosition[axis] + offset[axis], ref speed, m_Elasticity, Mathf.Infinity, deltaTime);
if (_scrollState == EScrollState.ESS_Decelerate)
{
m_Velocity[axis] = speed;
}
}
// Else move content according to velocity with deceleration applied.
else if (m_Inertia)
{
if (_scrollState == EScrollState.ESS_Decelerate)
{
m_Velocity[axis] *= Mathf.Pow(m_DecelerationRate, deltaTime);
if (Mathf.Abs(m_Velocity[axis]) < 1)
{
m_Velocity[axis] = 0;
}
}
position[axis] += m_Velocity[axis] * deltaTime;
}
// If we have neither elaticity or friction, there shouldn't be any velocity.
else
{
if (_scrollState == EScrollState.ESS_Decelerate)
{
m_Velocity[axis] = 0;
}
}
}
if (m_Velocity != Vector2.zero)
{
if (m_MovementType == MovementType.Clamped)
{
offset = CalculateOffset(position - m_Content.anchoredPosition);
position += offset;
}
SetContentAnchoredPosition(position);
}
}
//scroll ending animation
if (_scrollState == EScrollState.ESS_EndedAnim && m_Content.anchoredPosition.y > 0)
{
float rest = m_Content.anchoredPosition.y - m_fEndingAnimSpeed;
if (rest <= 0)
{
rest = 0;
_scrollState = EScrollState.ESS_MAX;
if (m_onStopScroll != null)
{
bRunLateUpdated = false;
m_onStopScroll.Invoke(_curFocuesdTrans);
}
}
Vector2 position = new Vector2(0, rest);
SetContentAnchoredPosition(position);
}
//scroll ending
if (_scrollState == EScrollState.ESS_Ended)
{
PostScroll();
_scrollState = EScrollState.ESS_EndedAnim;
}
//decelerating
if (_scrollState == EScrollState.ESS_Decelerate && m_Velocity.y <= m_fEndSpeed)
{
_scrollState = EScrollState.ESS_Ended;
float totalDis = CalculateMoveDistance();
Vector2 position = m_Content.anchoredPosition;
position.y += totalDis;
_scrollState = EScrollState.ESS_Ended;
m_Velocity = new Vector2(0, 0);
SetContentAnchoredPosition(position);
}
if (m_ViewBounds != m_PrevViewBounds || m_ContentBounds != m_PrevContentBounds || m_Content.anchoredPosition != m_PrevPosition)
{
// UpdateScrollbars(offset);
m_OnValueChanged.Invoke(normalizedPosition);
UpdatePrevData();
}
}
