protected override void OnRectTransformDimensionsChange()
{
base.OnRectTransformDimensionsChange();
CalculateRectTransformDimensions();
var isDirty = (_dirtyAxis & parentControlledAxis) != 0;
//We will only set dirty if value of new rect is smaller than preferred size
if (isDirty &&
(_dirtyAxis.HasFlag(DrivenAxis.Vertical) && _cachedRectHeight < m_TotalPreferredSize.y) ||
(_dirtyAxis.HasFlag(DrivenAxis.Horizontal) && _cachedRectWidth < m_TotalPreferredSize.x))
{
isDirty = false;
}
//Prevent change size while calculating feedback
if (isDirty)
{
SetDirty();
}
else
{
_dirtyAxis &= ~(DrivenAxis.Horizontal | DrivenAxis.Vertical);
}
}
public virtual void SendFeedback()
{
if (group != null && group.rectTransform != null && (_dirtyAxis.HasFlag(DrivenAxis.Ignore) || (group.childrenControlledAxis & _dirtyAxis) != 0))
{
group.SetElementDirty(this, _dirtyAxis);
_dirtyAxis = 0;
}
}
protected void SetAxisDirty(DrivenAxis dirtyAxis)
{
if (!isDirty)
{
MarkLayoutForRebuild();
}
_dirtyAxis |= dirtyAxis;
}
public virtual void SetElementDirty(IFastLayoutFeedback driven, DrivenAxis dirtyAxis)
{
if (driven != null && (dirtyAxis.HasFlag(DrivenAxis.Ignore) || (dirtyAxis & childrenControlledAxis) != 0))
{
if (!isDirty)
{
MarkLayoutForRebuild();
}
_dirtyChildren.Add(driven);
}
}
protected virtual void CalculateRectTransformDimensions(bool canDirtyInLayoutRebuild = false)
{
cachedRectWidth = rectTransform.sizeDelta.x;
cachedRectHeight = rectTransform.sizeDelta.y;
//Prevent change size while calculating feedback
if (!canDirtyInLayoutRebuild && CanvasUpdateRegistry.IsRebuildingLayout())
{
_dirtyAxis = DrivenAxis.None;
}
else
{
SendFeedback();
}
}
public override void SetElementDirty(IFastLayoutFeedback driven, DrivenAxis dirtyAxis)
{
if (driven != null && (dirtyAxis.HasFlag(DrivenAxis.Ignore) || (dirtyAxis & childrenControlledAxis) != 0))
{
if (!isDirty)
{
MarkLayoutForRebuild();
}
//Special case when added element will affect other elements size
if (dirtyAxis.HasFlag(DrivenAxis.Ignore) &&
((isVertical && m_TotalFlexibleSize.y > 0) ||
(!isVertical && m_TotalFlexibleSize.x > 0)))
{
isAxisDirty = true;
}
_dirtyChildren.Add(driven);
}
}
protected void SetAxisDirty(DrivenAxis dirtyAxis)
{
_dirtyAxis |= dirtyAxis;
}