/// <summary>Here the grid adapter checks if new groups need to be created or if old ones need to be disabled or destroyed, after which it calls <see cref="UpdateCellViewsHolder(TCellVH)"/> for each remaining cells</summary>
/// <seealso cref="ScrollRectItemsAdapter8{TParams, TItemViewsHolder}.UpdateViewsHolder(TItemViewsHolder)"/>
/// <param name="newOrRecycled">The viewholder of the group that needs updated</param>
protected override void UpdateViewsHolder(CellGroupViewsHolder <TCellVH> newOrRecycled)
{
// At this point there is for sure enough groups, but there may not be enough enabled cells, or there may be too much enabled cells
int activeCellsForThisGroup;
// If it's the last one
if (newOrRecycled.itemIndex + 1 == GetItemCount())
{
int totalCellsBeforeThisGroup = 0;
if (newOrRecycled.itemIndex > 0)
{
totalCellsBeforeThisGroup = newOrRecycled.itemIndex * _Params.numCellsPerGroup;
}
activeCellsForThisGroup = _CellsCount - totalCellsBeforeThisGroup;
}
else
{
activeCellsForThisGroup = _Params.numCellsPerGroup;
}
newOrRecycled.NumActiveCells = activeCellsForThisGroup;
for (int i = 0; i < activeCellsForThisGroup; ++i)
{
UpdateCellViewsHolder(newOrRecycled.ContainingCellViewHolders[i]);
}
}
/// <summary> Creates the Group viewholder which instantiates the group prefab using the provided params in <see cref="ScrollRectItemsAdapter8{TParams, TItemViewsHolder}.Init(TParams)"/></summary>
/// <seealso cref="ScrollRectItemsAdapter8{TParams, TItemViewsHolder}.CreateViewsHolder(int)"/>
/// <param name="itemIndex">the index of the GROUP (attention, not the CELL) that needs creation</param>
/// <returns>The created group views holder </returns>
protected override CellGroupViewsHolder <TCellVH> CreateViewsHolder(int itemIndex)
{
var instance = new CellGroupViewsHolder <TCellVH>();
instance.Init(_Params.GetGroupPrefab(itemIndex).gameObject, itemIndex, _Params.cellPrefab, _Params.numCellsPerGroup);
return(instance);
}
/// <summary>
/// Overridden in order to call <see cref="OnBeforeRecycleOrDisableCellViewsHolder(TCellVH, int)"/> for each active cell in the group
/// </summary>
/// <seealso cref="SRIA{TParams, TItemViewsHolder}.OnBeforeRecycleOrDisableViewsHolder(TItemViewsHolder, int)"/>
protected sealed override void OnBeforeRecycleOrDisableViewsHolder(CellGroupViewsHolder <TCellVH> inRecycleBinOrVisible, int newItemIndex)
{
base.OnBeforeRecycleOrDisableViewsHolder(inRecycleBinOrVisible, newItemIndex);
// 2 fors are more efficient
if (newItemIndex == -1)
{
for (int i = 0; i < inRecycleBinOrVisible.NumActiveCells; ++i)
{
OnBeforeRecycleOrDisableCellViewsHolder(inRecycleBinOrVisible.ContainingCellViewsHolders[i], -1);
}
}
else
{
for (int i = 0; i < inRecycleBinOrVisible.NumActiveCells; ++i)
{
OnBeforeRecycleOrDisableCellViewsHolder(inRecycleBinOrVisible.ContainingCellViewsHolders[i], newItemIndex * _Params.numCellsPerGroup + i);
}
}
}
