public LayoutDimensions PrecalculateCellLayoutData(CellData cellData, LayoutAxis axis)
{
// Set up the proxy cell to reflect the same layout and rect as our cell would be instantiated as
var recyclerCell = CellPool.CellProxy.GetComponent <IRecyclableCell>();
var proxyRtx = (RectTransform)CellPool.CellProxy.transform;
recyclerCell.OnCellInstantiate();
recyclerCell.OnCellShow(cellData);
LayoutRebuilder.ForceRebuildLayoutImmediate(proxyRtx);
LayoutAxis initialAxis =
(ICellLayout.LayoutGroup is VerticalCellLayout) ? LayoutAxis.Horizontal : LayoutAxis.Vertical;
LayoutAxis secondaryAxis =
(initialAxis == LayoutAxis.Horizontal) ? LayoutAxis.Vertical : LayoutAxis.Horizontal;
var iLayout = CellPool.CellProxy.GetComponent <ILayoutElement>();
Action <string> dbgPrint = (string msg) =>
{
//Debug.Log(string.Format("{0} proxyRtx.rect.size = {1} preferredSize = {2} minSize = {3} flexibleSize = {4}",
// msg,
// proxyRtx.rect.size,
// new Vector2(iLayout.preferredWidth, iLayout.preferredHeight),
// new Vector2(iLayout.minWidth, iLayout.minHeight),
// new Vector2(iLayout.flexibleWidth, iLayout.flexibleHeight)));
};
Action <string> placeCell = (string message) =>
{
PlaceCell(proxyRtx, initialAxis);
dbgPrint(message + "Initial Axis: ");
PlaceCell(proxyRtx, secondaryAxis);
dbgPrint(message + "Secondary Axis: ");
};
placeCell("FIRST FRAME (1): ");
LayoutRebuilder.ForceRebuildLayoutImmediate(proxyRtx);
placeCell("FIRST FRAME (2): ");
CoroutineRunner.WaitForEndOfFrame(() => placeCell("SECOND FRAME: "));
return(GetProxyLayoutDimensions(axis));
}
