private void InitializeTween(int dataIndex, int cellViewIndex)
{
_data[dataIndex].isExpanded = !_data[dataIndex].isExpanded;
for (var i = 0; i < _data.Count; i++)
{
if (i != dataIndex)
{
if (((dataIndex + 2) % 3 == 0) || ((i + 2) % 3 == 0))
{
_data[i].isExpanded = false;
}
}
}
var cellPosition = scroller.GetScrollPositionForCellViewIndex(cellViewIndex, EnhancedScroller.CellViewPositionEnum.Before);
var tweenCellOffset = cellPosition - scroller.ScrollPosition;
scroller.IgnoreLoopJump(true);
scroller.ReloadData();
cellPosition = scroller.GetScrollPositionForCellViewIndex(cellViewIndex, EnhancedScroller.CellViewPositionEnum.Before);
scroller.SetScrollPositionImmediately(cellPosition - tweenCellOffset);
scroller.IgnoreLoopJump(false);
if (_data[dataIndex].tweenType == Tween.TweenType.immediate)
{
return;
}
_lastPadderActive = scroller.LastPadder.IsActive();
_lastPadderSize = scroller.LastPadder.minHeight;
if (_data[dataIndex].isExpanded)
{
scroller.LastPadder.minHeight += _data[dataIndex].SizeDifference;
}
else
{
scroller.LastPadder.minHeight -= _data[dataIndex].SizeDifference;
}
scroller.LastPadder.gameObject.SetActive(true);
var cellViewTween = scroller.GetCellViewAtDataIndex(dataIndex) as CellView;
cellViewTween.BeginTween();
}
/// <summary>
/// This method is called by the cell view when the cell is clicked.
/// It will set all the expansion properties of the cells, reload the scroller,
/// set the position correctly, and kick off the tweening of the cell size
/// </summary>
/// <param name="dataIndex">The data index of the cell</param>
/// <param name="cellViewIndex">The cell view index of the cell</param>
private void InitializeTween(int dataIndex, int cellViewIndex)
{
// toggle the cell's expansion
_data[dataIndex].isExpanded = !_data[dataIndex].isExpanded;
// set all the other cells' expansion properties
for (var i = 0; i < _data.Count; i++)
{
// if not this cell
if (i != dataIndex)
{
// if the clicked cell is a single cell or if this iteration is a single cell
// collapse other cells
if (((dataIndex + 2) % 3 == 0) || ((i + 2) % 3 == 0))
{
_data[i].isExpanded = false;
}
}
}
// get the cell's position (using the cell view index in case of looping)
var cellPosition = scroller.GetScrollPositionForCellViewIndex(cellViewIndex, EnhancedScroller.CellViewPositionEnum.Before);
// get the offset of the cell from the top of the scroll rect
var tweenCellOffset = cellPosition - scroller.ScrollPosition;
// turn off loop jumping so that the scroller will not try to jump to a new location as the cell is expanding / collapsing
scroller.IgnoreLoopJump(true);
// reload the scroller to accommodate the new cell sizes
scroller.ReloadData();
// get the new position of the cell (using the cell view index in case of looping)
cellPosition = scroller.GetScrollPositionForCellViewIndex(cellViewIndex, EnhancedScroller.CellViewPositionEnum.Before);
// set the scroller's position to focus on the cell, using the offset calculated above
scroller.SetScrollPositionImmediately(cellPosition - tweenCellOffset);
// turn loop jumping back on
scroller.IgnoreLoopJump(false);
// if this cell has an immediate tween type, then we can just exit the
// method and not worry about adjusting padder sizes or calling
// the tweening on the cell
if (_data[dataIndex].tweenType == Tween.TweenType.immediate)
{
return;
}
// cache the last padder's active state and size for after the tween
_lastPadderActive = scroller.LastPadder.IsActive();
_lastPadderSize = scroller.LastPadder.minHeight;
// manually set the last padder's size so that we can tween the cell
// size without distorting all the cells' sizes
if (_data[dataIndex].isExpanded)
{
scroller.LastPadder.minHeight += _data[dataIndex].SizeDifference;
}
else
{
scroller.LastPadder.minHeight -= _data[dataIndex].SizeDifference;
}
// make sure the last padder is active so that we can tween its size
scroller.LastPadder.gameObject.SetActive(true);
// grab the cell that was clicked so that we can start tweening.
// note that we cannot just pass in the cell to this method since we
// are calling ReloadData, which destroys that cell. Grabbing it
// here is the only way to get an active cell after the reload.
var cellViewTween = scroller.GetCellViewAtDataIndex(dataIndex) as CellView;
// start the cell's tweening process
cellViewTween.BeginTween();
}