protected override void insertChildRenderObject(RenderObject child, object slotRaw)
{
D.assert(slotRaw != null);
int slot = (int)slotRaw;
D.assert(this._currentlyUpdatingChildIndex == slot);
D.assert(this.renderObject.debugValidateChild(child));
this.renderObject.insert((RenderBox)child, after: this._currentBeforeChild);
D.assert(() => {
SliverMultiBoxAdaptorParentData childParentData = (SliverMultiBoxAdaptorParentData)child.parentData;
D.assert(slot == childParentData.index);
return(true);
});
}
public override void applyParentData(RenderObject renderObject)
{
D.assert(renderObject.parentData is SliverMultiBoxAdaptorParentData);
SliverMultiBoxAdaptorParentData parentData = (SliverMultiBoxAdaptorParentData)renderObject.parentData;
if (parentData.keepAlive != this.keepAlive)
{
parentData.keepAlive = this.keepAlive;
var targetParent = renderObject.parent;
if (targetParent is RenderObject && !this.keepAlive)
{
((RenderObject)targetParent).markNeedsLayout();
}
}
}
public override void debugVisitOnstageChildren(ElementVisitor visitor)
{
this._childElements.Values.Where(child => {
SliverMultiBoxAdaptorParentData parentData =
(SliverMultiBoxAdaptorParentData)child.renderObject.parentData;
double itemExtent = 0;
switch (this.renderObject.constraints.axis)
{
case Axis.horizontal:
itemExtent = child.renderObject.paintBounds.width;
break;
case Axis.vertical:
itemExtent = child.renderObject.paintBounds.height;
break;
}
return(parentData.layoutOffset < this.renderObject.constraints.scrollOffset +
this.renderObject.constraints.remainingPaintExtent &&
parentData.layoutOffset + itemExtent > this.renderObject.constraints.scrollOffset);
}).ToList().ForEach(e => visitor(e));
}
