Can't fling sheet closed using header.

[dickermoshe]

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

untitlssssssssssed.webm

[alesiaradkevich]

Hello! Can you please provide code to reproduce this issue?

[dickermoshe]

@alesiaradkevich
Sorry about the delayed response.
This happens with any customBuilder
Can you please reopen this?

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,
                    ),
                  ],
                ),
              );
            },
          )),
    );
  }
}

[dickermoshe]

This package is awesome!
This was the only issue I found, but it made me unable to use the package.
It really was a shame because everything else is so freakn easy.
Add a donate button!

[dickermoshe]

Recreated Issue With Sample Code