protected void SetChildRect(int index, int axis, float pos, float size, bool sizeDrive)
{
ChildRect childRect = m_RectChildren.Array[index];
childRect.properties |= DrivenTransformProperties.Anchors;
if (axis == 0)
{
childRect.rect.xMin = pos + rectTransform.rect.xMin;
childRect.rect.width = size;
childRect.properties |= DrivenTransformProperties.AnchoredPositionX;
if (sizeDrive)
{
childRect.properties |= DrivenTransformProperties.SizeDeltaX;
}
}
else
{
childRect.rect.yMin = rectTransform.rect.yMin + rectTransform.rect.height - pos - size;
childRect.rect.height = size;
childRect.properties |= DrivenTransformProperties.AnchoredPositionY;
if (sizeDrive)
{
childRect.properties |= DrivenTransformProperties.SizeDeltaY;
}
}
m_RectChildren.Array[index] = childRect;
}
private void UpdateItems()
{
if (m_ChildArray == null || m_PerformingUpdateItems)
{
return;
}
m_PerformingUpdateItems = true;
bool isDirty = false;
Rect clipRect = GetViewRect();
if (clipRect != m_ViewportRect || m_IsLayoutDirty)
{
m_ViewportRect = clipRect;
List <int> visibleIndexes = ListPool <int> .Get();
if (m_PreRectChildrenCount > m_RectChildren.Count)
{
for (int i = m_RectChildren.Count; i < m_PreRectChildrenCount; i++)
{
dataContent.Release(i);
}
m_PreRectChildrenCount = m_RectChildren.Count;
}
for (int i = m_RectChildren.Offset; i < m_RectChildren.Count; i++)
{
if (m_ViewportRect.Overlaps(m_RectChildren.Array[i].rect))
{
visibleIndexes.Add(i);
}
else
{
dataContent.Release(i);
}
}
foreach (var index in visibleIndexes)
{
ChildRect child = m_RectChildren.Array[index];
Rect rect = new Rect(child.rect.min - rectTransform.rect.min, child.rect.size);
var childRect = dataContent.Show(index, rect, m_IsLayoutDirty);
if (!childRect)
{
continue;
}
SetChildAlongAxis(childRect, 0, rect.xMin, rect.width, child.properties);
SetChildAlongAxis(childRect, 1, rect.yMin, rect.height, child.properties);
isDirty = true;
}
ListPool <int> .Release(visibleIndexes);
m_IsLayoutDirty = false;
}
if (isDirty && !CanvasUpdateRegistry.IsRebuildingGraphics() && !CanvasUpdateRegistry.IsRebuildingLayout())
{
Canvas.ForceUpdateCanvases();
}
m_PerformingUpdateItems = false;
}