showOverlay method
void
showOverlay({
- required dynamic onSelect(
- int index,
- NsgDropdownMenuItem element
- BuildContext? parentContext,
- Offset? offset,
- Widget? child,
Implementation
void showOverlay({required Function(int index, NsgDropdownMenuItem element) onSelect, BuildContext? parentContext, Offset? offset, Widget? child}) async {
final overlay = Overlay.of(context);
entry = OverlayEntry(builder: (context) {
Offset curOffset = const Offset(0, 0);
if (parentContext != null) {
curOffset = (parentContext.findRenderObject() as RenderBox).localToGlobal(Offset.zero);
}
if (offset != null) {
curOffset = offset;
}
return NsgDropdownMenuOverlay(
onSelect: (index, element) {
onSelect(index, element);
hideOverlay();
},
listController: listController,
offset: curOffset,
widgetList: widgetList,
entry: entry,
child: child,
);
});
overlay.insert(entry!);
}