public void SetCellsDimensions(LayoutAxis axis)
{
var hovLayoutGroup = (HorizontalOrVerticalLayoutGroup)ICellLayout.LayoutGroup;
float rectSizeOnCurrAxis = ((RectTransform)hovLayoutGroup.transform).rect.size[(int)axis];
bool initialAxis = (hovLayoutGroup is VerticalLayoutGroup) ^ (axis == LayoutAxis.Vertical);
float layoutPadding = (axis != 0) ? hovLayoutGroup.padding.vertical : hovLayoutGroup.padding.horizontal;
float layoutSizeWithoutPadding = rectSizeOnCurrAxis - layoutPadding;
bool layoutChildForceExpand =
(axis != 0) ? hovLayoutGroup.childForceExpandHeight : hovLayoutGroup.childForceExpandWidth;
if (initialAxis)
{
foreach (CellData cellRecord in CellRecords)
{
float minSize = RecyclerUtil.GetMinSize(cellRecord.LayoutData, (int)axis);
float preferredSize = RecyclerUtil.GetPreferredSize(cellRecord.LayoutData, (int)axis);
float flexibleSize = RecyclerUtil.GetFlexibleSize(cellRecord.LayoutData, (int)axis);
if (layoutChildForceExpand)
{
flexibleSize = Mathf.Max(flexibleSize, 1f);
}
float childSize = Mathf.Clamp(
layoutSizeWithoutPadding,
minSize,
(flexibleSize <= 0f) ? preferredSize : rectSizeOnCurrAxis);
float startOffset = RecyclerUtil.GetStartOffset(hovLayoutGroup, (int)axis, childSize);
cellRecord.RectTransformData.SetInsetAndSizeFromParentEdge(
(axis != 0) ? RectTransform.Edge.Top : RectTransform.Edge.Left,
startOffset,
childSize);
}
}
else
{
float childPos = ((axis != 0) ? hovLayoutGroup.padding.top : hovLayoutGroup.padding.left);
float layoutTotalMinSize = RecyclerUtil.GetTotalMinSize(hovLayoutGroup, (int)axis);
float layoutTotalPreferredSize = RecyclerUtil.GetTotalPreferredSize(hovLayoutGroup, (int)axis);
float layoutTotalFlexibleSize = RecyclerUtil.GetTotalFlexibleSize(hovLayoutGroup, (int)axis);
if (layoutTotalFlexibleSize == 0f && layoutTotalPreferredSize < rectSizeOnCurrAxis)
{
childPos = RecyclerUtil.GetStartOffset(hovLayoutGroup, (int)axis, layoutPadding);
}
float minToPreferredRatio = 0f;
if (layoutTotalMinSize != layoutTotalPreferredSize)
{
float rectSizeAfterMinSize = rectSizeOnCurrAxis - layoutTotalMinSize;
float deltaBetweenMinAndPreferred = layoutTotalPreferredSize - layoutTotalMinSize;
minToPreferredRatio = Mathf.Clamp01(rectSizeAfterMinSize / deltaBetweenMinAndPreferred);
}
float remainingSizeRatio = 0f;
if (rectSizeOnCurrAxis > layoutTotalPreferredSize && layoutTotalFlexibleSize > 0f)
{
remainingSizeRatio = (rectSizeOnCurrAxis - layoutTotalPreferredSize) / layoutTotalFlexibleSize;
}
foreach (CellData cellRecord in CellRecords)
{
float minSize = RecyclerUtil.GetMinSize(cellRecord.LayoutData, (int)axis);
float preferredSize = RecyclerUtil.GetPreferredSize(cellRecord.LayoutData, (int)axis);
float flexibleSize = RecyclerUtil.GetFlexibleSize(cellRecord.LayoutData, (int)axis);
if (layoutChildForceExpand)
{
flexibleSize = Mathf.Max(flexibleSize, 1f);
}
float childSize = Mathf.Lerp(minSize, preferredSize, minToPreferredRatio);
childSize += flexibleSize * remainingSizeRatio;
cellRecord.RectTransformData.SetInsetAndSizeFromParentEdge(
(axis != 0) ? RectTransform.Edge.Top : RectTransform.Edge.Left,
childPos,
childSize);
childPos += childSize + hovLayoutGroup.spacing;
}
}
}
LayoutDimensions GetCellLayoutDimensions(RectTransform cellRtx, LayoutAxis axis)
{
var layoutDims = new LayoutDimensions();
var rectTransform = (RectTransform)ICellLayout.LayoutGroup.transform;
var hovLayoutGroup = (HorizontalOrVerticalLayoutGroup)ICellLayout.LayoutGroup;
bool isVertical = hovLayoutGroup is VerticalLayoutGroup;
bool layoutChildForceExpand = (axis != 0)
? hovLayoutGroup.childForceExpandHeight
: hovLayoutGroup.childForceExpandWidth;
float layoutPadding = (axis != 0)
? ICellLayout.LayoutGroup.padding.vertical
: ICellLayout.LayoutGroup.padding.horizontal;
if (ICellLayout.CellLayout != null && ICellLayout.CellLayout.CellPrefab)
{
float rectSizeOnCurrAxis = rectTransform.rect.size[(int)axis];
bool initialAxis = isVertical ^ axis == LayoutAxis.Vertical;
if (initialAxis)
{
for (int i = 0; i < ICellLayout.CellLayout.CellRecords.Count; i++)
{
CellData currRecord = ICellLayout.CellLayout.CellRecords[i];
layoutDims.Min = RecyclerUtil.GetMinSize(cellRtx, (int)axis);
layoutDims.Preferred = RecyclerUtil.GetPreferredSize(cellRtx, (int)axis);
layoutDims.Flexible = RecyclerUtil.GetFlexibleSize(cellRtx, (int)axis);
if (layoutChildForceExpand)
{
layoutDims.Flexible = Mathf.Max(layoutDims.Flexible, 1f);
}
float childSize = Mathf.Clamp(
layoutPadding,
layoutDims.Min,
(layoutDims.Flexible <= 0f) ? layoutDims.Preferred : rectSizeOnCurrAxis);
float startOffset = RecyclerUtil.GetStartOffset(ICellLayout.LayoutGroup, (int)axis, childSize);
currRecord.RectTransformData.SetInsetAndSizeFromParentEdge(
(axis != 0) ? RectTransform.Edge.Top : RectTransform.Edge.Left,
startOffset,
childSize);
}
}
else
{
float childPos = layoutPadding;
float totalLayoutMinSize = RecyclerUtil.GetTotalMinSize(ICellLayout.LayoutGroup, (int)axis);
float totalLayoutPreferredSize = RecyclerUtil.GetTotalPreferredSize(ICellLayout.LayoutGroup, (int)axis);
float totalLayoutFlexibleSize = RecyclerUtil.GetTotalFlexibleSize(ICellLayout.LayoutGroup, (int)axis);
bool layoutRectLargeEnoughForPreferred = totalLayoutPreferredSize < rectSizeOnCurrAxis;
if ((totalLayoutFlexibleSize == 0f) && layoutRectLargeEnoughForPreferred)
{
float requiredSpaceWithoutPadding = totalLayoutPreferredSize - layoutPadding;
childPos = RecyclerUtil.GetStartOffset(
ICellLayout.LayoutGroup,
(int)axis,
requiredSpaceWithoutPadding);
}
float flexibleScalar = 0f;
if (!(totalLayoutMinSize == totalLayoutPreferredSize))
{
flexibleScalar = Mathf.Clamp01(
(rectSizeOnCurrAxis - totalLayoutMinSize)
/ totalLayoutPreferredSize
- totalLayoutMinSize);
}
float sizeRatio = 0f;
if (rectSizeOnCurrAxis > totalLayoutPreferredSize && totalLayoutFlexibleSize > 0f)
{
sizeRatio = (rectSizeOnCurrAxis - totalLayoutPreferredSize) / totalLayoutFlexibleSize;
}
for (int j = 0; j < ICellLayout.CellLayout.CellRecords.Count; j++)
{
CellData currRecord = ICellLayout.CellLayout.CellRecords[j];
RectTransform childRect = (RectTransform)ICellLayout.CellLayout.CellPrefab.transform;
layoutDims.Min = RecyclerUtil.GetMinSize(childRect, (int)axis);
layoutDims.Preferred = RecyclerUtil.GetPreferredSize(childRect, (int)axis);
layoutDims.Flexible = RecyclerUtil.GetFlexibleSize(childRect, (int)axis);
if (layoutChildForceExpand)
{
layoutDims.Flexible = Mathf.Max(layoutDims.Flexible, 1f);
}
float childSize = Mathf.Lerp(layoutDims.Min, layoutDims.Preferred, flexibleScalar)
+ (layoutDims.Flexible * sizeRatio);
currRecord.RectTransformData.SetInsetAndSizeFromParentEdge(
(axis != 0) ? RectTransform.Edge.Top : RectTransform.Edge.Left,
childPos,
childSize);
childPos += childSize + hovLayoutGroup.spacing;
}
}
}
return(layoutDims);
}