paintIntersectionObserver method
void
paintIntersectionObserver(
- PaintingContext context,
- Offset offset,
- PaintingContextCallback callback
Implementation
void paintIntersectionObserver(PaintingContext context, Offset offset,
PaintingContextCallback callback) {
// Skip to next if not has intersection observer
if (_onIntersectionChange == null) {
callback(context, offset);
return;
}
if (_intersectionObserverLayer.layer == null) {
_intersectionObserverLayer.layer = IntersectionObserverLayer(
elementSize: size,
paintOffset: offset,
onIntersectionChange: _onIntersectionChange!
);
} else {
_intersectionObserverLayer.layer!.elementSize = semanticBounds.size;
_intersectionObserverLayer.layer!.paintOffset = offset;
}
context.pushLayer(_intersectionObserverLayer.layer!, callback, offset);
}