/// <summary>
/// 当Item未填满ScrollView时，限制在Top/Left
/// </summary>
/// <param name="pDragInfo"></param>
/// <returns></returns>
protected bool RestrictIfFits(ref RecycleTableDragInfo <T> pDragInfo)
{
if (!ScrollViewHasSpace())
{
return(false);
}
var tConstraint = Vector3.zero;
var b = itemsBounds;
b.center += itemTrans.localPosition + scrollViewTrans.localPosition;
switch (movement)
{
case UIScrollView.Movement.Horizontal:
var tMin = panelBounds.min.x - b.min.x;
tConstraint = new Vector3(tMin + panel.clipSoftness.x, 0, 0);
pDragInfo.dragDirection = tConstraint.x < 0 ? Direction.Left : tConstraint.x > 0 ? Direction.Right : Direction.None;
break;
case UIScrollView.Movement.Vertical:
var tMax = panelBounds.max.y - b.max.y;
tConstraint = new Vector3(0, tMax - panel.clipSoftness.y, 0);
pDragInfo.dragDirection = tConstraint.y > 0 ? Direction.Top : tConstraint.y < 0 ? Direction.Bottom : Direction.None;
break;
}
if (tConstraint.sqrMagnitude > 0.1F)
{
if (!pDragInfo.instant && scrollView.dragEffect == UIScrollView.DragEffect.MomentumAndSpring)
{
var tPos = scrollViewTrans.localPosition + tConstraint;
tPos.x = Mathf.Round(tPos.x);
tPos.y = Mathf.Round(tPos.y);
SpringPanel.Begin(scrollViewTrans.gameObject, tPos, 8F);
}
else
{
scrollView.MoveRelative(tConstraint);
var tMomentum = scrollView.currentMomentum;
if (Mathf.Abs(tConstraint.x) > 0.01F)
{
tMomentum.x = 0;
}
if (Mathf.Abs(tConstraint.y) > 0.01F)
{
tMomentum.y = 0;
}
if (Mathf.Abs(tConstraint.z) > 0.01F)
{
tMomentum.z = 0;
}
scrollView.currentMomentum = tMomentum;
}
}
return(true);
}
/// <summary>
/// ScrollView归位
/// </summary>
/// <param name="pInstant"></param>
protected void RestrictWithinBounds(RecycleTableDragInfo <T> pDragInfo)
{
if (!pDragInfo.restrictScrollView)
{
return;
}
if (!RestrictIfFits(ref pDragInfo))
{
scrollView.RestrictWithinBounds(pDragInfo.instant);
}
if (pDragInfo.isTopOrLeft && onStartTarget != null)
{
onStartTarget(pDragInfo.offset);
}
if (pDragInfo.isBottomOrRight && onEndTarget != null)
{
onEndTarget(pDragInfo.offset);
}
}
/// <summary>
/// 初始化
/// </summary>
protected void Init()
{
if (isNoneScrollView)
{
return;
}
NGUITools.DestroyChildren(scrollViewTrans);
scrollView.restrictWithinPanel = false;
scrollView.disableDragIfFits = false;
var tClipRegion = panel.finalClipRegion;
var tCenter = new Vector3(tClipRegion.x, tClipRegion.y, 0);
tCenter += scrollViewTrans.localPosition;
panelBounds = new Bounds(new Vector3(tCenter.x, tCenter.y, 0), new Vector3(tClipRegion.z, tClipRegion.w, 0));
scrollViewTrans.localPosition = Vector3.zero;
panel.clipOffset = Vector2.zero;
panel.baseClipRegion = new Vector4(panelBounds.center.x, panelBounds.center.y, panelBounds.size.x, panelBounds.size.y);
if (!itemTrans)
{
itemTrans = NGUITools.AddChild(scrollView.gameObject).transform;
itemTrans.name = "Items";
switch (movement)
{
case UIScrollView.Movement.Horizontal:
itemTrans.SetLocalPos(0, panel.finalClipRegion.y);
break;
case UIScrollView.Movement.Vertical:
itemTrans.SetLocalPos(panel.finalClipRegion.x, 0);
break;
}
}
if (!cacheTrans)
{
var tCacheTrans = scrollViewTrans.parent.Find("UIRecycleTableCache");
if (tCacheTrans != null)
{
cacheTrans = tCacheTrans;
}
else
{
cacheTrans = NGUITools.AddChild(scrollViewTrans.parent.gameObject).transform;
cacheTrans.name = "UIRecycleTableCache";
}
cacheTrans.gameObject.SetActive(false);
}
if (!springPanel)
{
springPanel = scrollViewTrans.gameObject.AddMissingComponent <SpringPanel>();
springPanel.enabled = false;
}
if (itemControllers == null)
{
itemControllers = new HashSet <T>();
}
dragInfo = new RecycleTableDragInfo <T>()
{
restrictScrollView = true,
instant = false,
dragDirection = Direction.None,
movement = movement,
panelOffset = Vector2.zero,
};
RegisterEvent();
MoveToItemByIndex(0);
}
/// <summary>
/// Panel裁剪时触发
/// </summary>
/// <param name="pPanel"></param>
protected void OnClipMove(UIPanel pPanel)
{
if (isNoneScrollView || itemCount == 0)
{
return;
}
var tPanelOffset = Vector3.zero;
var tAddItemDirection = CalculateAddItemDirection(out tPanelOffset);
var tIsLeft = tAddItemDirection == Direction.Left;
var tIsBottom = tAddItemDirection == Direction.Bottom;
var tIsRight = tAddItemDirection == Direction.Right;
var tIsTop = tAddItemDirection == Direction.Top;
if (tIsLeft || tIsTop)
{
AddItem(tIsLeft ? Direction.Left : tIsTop?Direction.Top: Direction.None);
var tIsTopOrLeft = false;
var tFirstItemCtrl = UIRecycleTableExtension.Find(itemControllers, x => x.recycleTablInfo.dataIndex == 0);
var tFirstBounds = new Bounds();
if (tFirstItemCtrl != null)
{
tFirstBounds = tFirstItemCtrl.recycleTablInfo.bounds;
tFirstBounds.center += tFirstItemCtrl.itemTransform.localPosition + scrollViewTrans.localPosition;
tIsTopOrLeft = tIsLeft ? tFirstBounds.min.x > panelBounds.min.x : tIsTop ? tFirstBounds.max.y < panelBounds.max.y : tIsTopOrLeft;
}
var tInfo = new RecycleTableDragInfo <T>()
{
restrictScrollView = tIsTopOrLeft,
panelOffset = tPanelOffset,
dragDirection = Direction.Top | Direction.Left,
instant = false,
movement = movement,
};
if (scrollView.isDragging)
{
dragInfo = tInfo;
if (!tIsTopOrLeft)
{
MoveOverBoundsItemToCache();
}
}
else if (tIsTopOrLeft)
{
RestrictWithinBounds(tInfo);
}
else
{
MoveOverBoundsItemToCache(false);
}
}
else if (tIsRight || tIsBottom)
{
AddItem(tIsRight ? Direction.Right : tIsBottom?Direction.Bottom: Direction.None);
var tIsBottomOrRight = false;
var tLastItemCtrl = UIRecycleTableExtension.Find(itemControllers, x => x.recycleTablInfo.dataIndex == itemCount - 1);
var tLastBounds = new Bounds();
if (tLastItemCtrl != null)
{
tLastBounds = tLastItemCtrl.recycleTablInfo.bounds;
tLastBounds.center += tLastItemCtrl.itemTransform.localPosition + scrollViewTrans.localPosition;
tIsBottomOrRight = tIsRight ? tLastBounds.max.x <panelBounds.max.x : tIsBottom?tLastBounds.min.y> panelBounds.min.y : tIsBottomOrRight;
}
var tInfo = new RecycleTableDragInfo <T>()
{
restrictScrollView = tIsBottomOrRight,
panelOffset = tPanelOffset,
dragDirection = Direction.Bottom | Direction.Right,
instant = false,
movement = movement,
};
if (scrollView.isDragging)
{
dragInfo = tInfo;
if (!tIsBottomOrRight)
{
MoveOverBoundsItemToCache();
}
}
else if (tIsBottomOrRight)
{
RestrictWithinBounds(tInfo);
}
else
{
MoveOverBoundsItemToCache(false);
}
}
}
/// <summary>
/// Panel裁剪时触发
/// </summary>
/// <param name="pPanel"></param>
protected void OnClipMove(UIPanel pPanel)
{
if (isNoneScrollView || itemCount == 0)
{
return;
}
var tPanelOffset = panel.CalculateConstrainOffset(itemsBounds.min, itemsBounds.max);
var tIsLeft = tPanelOffset.x < -1 && movement == UIScrollView.Movement.Horizontal;
var tIsBottom = tPanelOffset.y < -1 && movement == UIScrollView.Movement.Vertical;
var tIsRight = tPanelOffset.x > 1 && movement == UIScrollView.Movement.Horizontal;
var tIsTop = tPanelOffset.y > 1 && movement == UIScrollView.Movement.Vertical;
if (tIsLeft || tIsTop)
{
AddItem(tIsLeft ? Direction.Left : tIsTop?Direction.Top: Direction.None);
var tIsTopOrLeft = false;
var tFirstItemCtrls = itemControllers == null || itemControllers.Count == 0 ? null : itemControllers.Where(x => x.recycleTablInfo.dataIndex == 0);
var tFirstBounds = new Bounds();
if (tFirstItemCtrls != null && tFirstItemCtrls.Count() == 1)
{
var tItemCtrl = tFirstItemCtrls.First();
tFirstBounds = tItemCtrl.recycleTablInfo.bounds;
tFirstBounds.center += tItemCtrl.itemTransform.localPosition + scrollViewTrans.localPosition;
tIsTopOrLeft = tIsLeft ? tFirstBounds.min.x > panelBounds.min.x : tIsTop ? tFirstBounds.max.y < panelBounds.max.y : tIsTopOrLeft;
}
var tInfo = new RecycleTableDragInfo <T>()
{
restrictScrollView = tIsTopOrLeft,
panelOffset = tPanelOffset,
dragDirection = Direction.Top | Direction.Left,
instant = false,
movement = movement,
};
if (scrollView.isDragging)
{
dragInfo = tInfo;
if (!tIsTopOrLeft)
{
MoveOverBoundsItemToCache();
}
}
else if (tIsTopOrLeft)
{
RestrictWithinBounds(tInfo);
}
else
{
MoveOverBoundsItemToCache(false);
}
}
else if (tIsRight || tIsBottom)
{
AddItem(tIsRight ? Direction.Right : tIsBottom?Direction.Bottom: Direction.None);
var tIsBottomOrRight = false;
var tLastItemCtrls = itemControllers == null || itemControllers.Count == 0 ? null : itemControllers.Where(x => x.recycleTablInfo.dataIndex == itemCount - 1);
var tLastBounds = new Bounds();
if (tLastItemCtrls != null && tLastItemCtrls.Count() == 1)
{
var tItemCtrl = tLastItemCtrls.First();
tLastBounds = tItemCtrl.recycleTablInfo.bounds;
tLastBounds.center += tItemCtrl.itemTransform.localPosition + scrollViewTrans.localPosition;
tIsBottomOrRight = tIsRight ? tLastBounds.max.x <panelBounds.max.x : tIsBottom?tLastBounds.min.y> panelBounds.min.y : tIsBottomOrRight;
}
var tInfo = new RecycleTableDragInfo <T>()
{
restrictScrollView = tIsBottomOrRight,
panelOffset = tPanelOffset,
dragDirection = Direction.Bottom | Direction.Right,
instant = false,
movement = movement,
};
if (scrollView.isDragging)
{
dragInfo = tInfo;
if (!tIsBottomOrRight)
{
MoveOverBoundsItemToCache();
}
}
else if (tIsBottomOrRight)
{
RestrictWithinBounds(tInfo);
}
else
{
MoveOverBoundsItemToCache(false);
}
}
}