This project forked from tchigher/sliding-sheet
A widget that can be dragged and scrolled in a single gesture and snapped to a list of extents.
Home Page: https://what-the-flutter.github.io/wtf_sliding_sheet/
License: MIT License
This function returns the widget that handles the header and footer gestures.
https://github.com/What-the-Flutter/wtf_sliding_sheet/blob/bcce0088049570efea5b6dd483869711a76ece0a/lib/src/sheet.dart#L1179
When the user finishes a drag, if there is sufficient velocity, the sheet will snap to the next / previous snapping point.
This function is on the gesture handler handles that.
https://github.com/What-the-Flutter/wtf_sliding_sheet/blob/bcce0088049570efea5b6dd483869711a76ece0a/lib/src/sheet.dart#L1219
BUG
When SetState runs at the end of this function, the sheet snaps back open. This only happens when closing a sheet.
This is only happening when using a customBuilder
It seems that the extent value is not being updated properly, calling set state therefore rebuilds the sheet in an open state
https://github.com/What-the-Flutter/wtf_sliding_sheet/blob/bcce0088049570efea5b6dd483869711a76ece0a/lib/src/sheet.dart#L1228
SnapSpec(
snappings: [SnapSpec.headerSnap, 1.0],
initialSnap: SnapSpec.headerSnap,
)
You can't fling a sheet shut by the header if you set the set 1st snap point to SnapSpec.headerSnap.
Although dragging it shut does work.
This also seems to happen if you set positioning: SnapPositioning.pixelOffset
When using more than 2 snapping points on SlidingSheetDialog, e.g [0.3, 0.7, 1], intermediate snapping is not working.
listener is called tens of times DURING build.
This is caused by this:
wtf_sliding_sheet/lib/src/sheet.dart
Line 866 in 006793a
This is actually a setter on a value notifier, this needs to happen on a post frame callback!
Hello!
I've encountered an unhandled exception while scrolling through the component. The issue seems to arise whenever I try to scroll, with showScrollbar enabled.
Error: "The Scrollbar's ScrollController has no ScrollPosition attached."
Reproducible example:
Future<void> showBottomSheetDialog(
BuildContext context,
) async {
final controller = SheetController();
await showSlidingBottomSheet(
context,
builder: (_) {
return SlidingSheetDialog(
controller: controller,
duration: const Duration(milliseconds: 500),
snapSpec: const SnapSpec(
snap: true,
initialSnap: 0.7,
snappings: [0.3, 0.7],
),
scrollSpec: const ScrollSpec(
showScrollbar: true,
),
builder: (_, __) => Column(
children: [
Container(
height: 200,
color: Colors.black,
),
Container(
height: 700,
color: Colors.red,
),
],
),
);
},
);
}
Could you please take a look? Thank you!
When using a customBuilder for the sheet, you can't fling the sheet closed by dragging on the header, It snaps back up.
import 'package:flutter/material.dart';
import 'package:wtf_sliding_sheet/wtf_sliding_sheet.dart';
void main() {
runApp(const MainApp());
}
class MainApp extends StatelessWidget {
const MainApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Hello World!'),
),
body: SlidingSheet(
snapSpec: const SnapSpec(
snap: true,
snappings: [0.2, 1.0],
positioning: SnapPositioning.relativeToAvailableSpace,
),
body: Center(
child: Text('This widget is below the SlidingSheet'),
),
headerBuilder: (context, state) {
return Container(
height: 100,
color: Colors.black,
child: Center(
child: Text("Header"),
),
);
},
customBuilder: (context, controller, state) {
return SingleChildScrollView(
controller: controller,
child: Column(
children: [
Container(
height: 100,
color: Colors.red,
),
Container(
height: 100,
color: Colors.blue,
),
Container(
height: 100,
color: Colors.yellow,
),
Container(
height: 100,
color: Colors.red,
),
Container(
height: 100,
color: Colors.blue,
),
Container(
height: 100,
color: Colors.yellow,
),
],
),
);
},
)),
);
}
}
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