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Refactored LazyLoadingGridView again

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This commit is contained in:
ashilkn 2023-05-03 18:17:21 +05:30
parent 8c4cd43357
commit 366c117cdf
1 changed files with 135 additions and 46 deletions
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181
lib/ui/huge_listview/lazy_loading_gallery.dart
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@ -350,7 +350,7 @@ class LazyLoadingGridView extends StatefulWidget {
}
class _LazyLoadingGridViewState extends State<LazyLoadingGridView> {
bool? _shouldRender;
late bool _shouldRender;
int? _currentUserID;
late StreamSubscription<ClearSelectionsEvent> _clearSelectionsEvent;
@ -389,53 +389,19 @@ class _LazyLoadingGridViewState extends State<LazyLoadingGridView> {
@override
Widget build(BuildContext context) {
if (widget.shouldRecycle) {
return _getRecyclableView();
} else {
return _getNonRecyclableView();
}
}
Widget _getRecyclableView() {
return VisibilityDetector(
key: Key("gallery" + widget.filesInDay.first.tag),
onVisibilityChanged: (visibility) {
final shouldRender = visibility.visibleFraction > 0;
if (mounted && shouldRender != _shouldRender) {
setState(() {
_shouldRender = shouldRender;
});
}
},
child: _shouldRender!
? GalleryGridViewWidget(
filesInDay: widget.filesInDay,
photoGridSize: widget.photoGridSize!,
limitSelectionToOne: widget.limitSelectionToOne,
tag: widget.tag,
asyncLoader: widget.asyncLoader,
selectedFiles: widget.selectedFiles,
currentUserID: _currentUserID,
)
: PlaceHolderWidget(widget.filesInDay.length, widget.photoGridSize!),
);
}
Widget _getNonRecyclableView() {
if (!_shouldRender!) {
return VisibilityDetector(
key: Key("gallery" + widget.filesInDay.first.tag),
onVisibilityChanged: (visibility) {
if (mounted && visibility.visibleFraction > 0 && !_shouldRender!) {
setState(() {
_shouldRender = true;
});
}
},
child:
PlaceHolderWidget(widget.filesInDay.length, widget.photoGridSize!),
return RecyclableViewWidget(
shouldRender: _shouldRender,
filesInDay: widget.filesInDay,
photoGridSize: widget.photoGridSize!,
limitSelectionToOne: widget.limitSelectionToOne,
tag: widget.tag,
asyncLoader: widget.asyncLoader,
selectedFiles: widget.selectedFiles,
currentUserID: _currentUserID,
);
} else {
return GalleryGridViewWidget(
return NonRecyclableViewWidget(
shouldRender: _shouldRender,
filesInDay: widget.filesInDay,
photoGridSize: widget.photoGridSize!,
limitSelectionToOne: widget.limitSelectionToOne,
@ -673,3 +639,126 @@ class GalleryFileWidget extends StatelessWidget {
routeToPage(context, page, forceCustomPageRoute: true);
}
}
class RecyclableViewWidget extends StatefulWidget {
final bool shouldRender;
final List<File> filesInDay;
final int photoGridSize;
final bool limitSelectionToOne;
final String tag;
final GalleryLoader asyncLoader;
final int? currentUserID;
final SelectedFiles? selectedFiles;
const RecyclableViewWidget({
required this.shouldRender,
required this.filesInDay,
required this.photoGridSize,
required this.limitSelectionToOne,
required this.tag,
required this.asyncLoader,
this.currentUserID,
this.selectedFiles,
super.key,
});
@override
State<RecyclableViewWidget> createState() => _RecyclableViewWidgetState();
}
class _RecyclableViewWidgetState extends State<RecyclableViewWidget> {
late bool _shouldRender;
@override
void initState() {
_shouldRender = widget.shouldRender;
super.initState();
}
@override
Widget build(BuildContext context) {
return VisibilityDetector(
key: Key("gallery" + widget.filesInDay.first.tag),
onVisibilityChanged: (visibility) {
final shouldRender = visibility.visibleFraction > 0;
if (mounted && shouldRender != _shouldRender) {
setState(() {
_shouldRender = shouldRender;
});
}
},
child: _shouldRender
? GalleryGridViewWidget(
filesInDay: widget.filesInDay,
photoGridSize: widget.photoGridSize,
limitSelectionToOne: widget.limitSelectionToOne,
tag: widget.tag,
asyncLoader: widget.asyncLoader,
selectedFiles: widget.selectedFiles,
currentUserID: widget.currentUserID,
)
: PlaceHolderWidget(widget.filesInDay.length, widget.photoGridSize),
);
}
}
class NonRecyclableViewWidget extends StatefulWidget {
final bool shouldRender;
final List<File> filesInDay;
final int photoGridSize;
final bool limitSelectionToOne;
final String tag;
final GalleryLoader asyncLoader;
final int? currentUserID;
final SelectedFiles? selectedFiles;
const NonRecyclableViewWidget({
required this.shouldRender,
required this.filesInDay,
required this.photoGridSize,
required this.limitSelectionToOne,
required this.tag,
required this.asyncLoader,
this.currentUserID,
this.selectedFiles,
super.key,
});
@override
State<NonRecyclableViewWidget> createState() =>
_NonRecyclableViewWidgetState();
}
class _NonRecyclableViewWidgetState extends State<NonRecyclableViewWidget> {
late bool _shouldRender;
@override
void initState() {
_shouldRender = widget.shouldRender;
super.initState();
}
@override
Widget build(BuildContext context) {
if (!_shouldRender!) {
return VisibilityDetector(
key: Key("gallery" + widget.filesInDay.first.tag),
onVisibilityChanged: (visibility) {
if (mounted && visibility.visibleFraction > 0 && !_shouldRender) {
setState(() {
_shouldRender = true;
});
}
},
child:
PlaceHolderWidget(widget.filesInDay.length, widget.photoGridSize),
);
} else {
return GalleryGridViewWidget(
filesInDay: widget.filesInDay,
photoGridSize: widget.photoGridSize,
limitSelectionToOne: widget.limitSelectionToOne,
tag: widget.tag,
asyncLoader: widget.asyncLoader,
selectedFiles: widget.selectedFiles,
currentUserID: widget.currentUserID,
);
}
}
}