public override void update(Widget _newWidget)
{
base.update(_newWidget);
_SliverPersistentHeaderRenderObjectWidget newWidget =
_newWidget as _SliverPersistentHeaderRenderObjectWidget;
_SliverPersistentHeaderRenderObjectWidget oldWidget = this.widget;
SliverPersistentHeaderDelegate newDelegate = newWidget.layoutDelegate;
SliverPersistentHeaderDelegate oldDelegate = oldWidget.layoutDelegate;
if (newDelegate != oldDelegate &&
(newDelegate.GetType() != oldDelegate.GetType() || newDelegate.shouldRebuild(oldDelegate)))
{
(this.renderObject as _RenderSliverPersistentHeaderForWidgetsMixin).triggerRebuild();
}
}
public _SliverPersistentHeaderElement(_SliverPersistentHeaderRenderObjectWidget widget) : base(widget)
{
}
