quire-io / scroll-to-index Goto Github PK

════════ Exception caught by widgets library ═══════════════════════════════════
The following assertion was thrown building DecoratedBoxTransition(animation: kAlwaysDismissedAnimation➩DecorationTween(BoxDecoration → BoxDecoration)➩BoxDecoration, state: _AnimatedState#59212):
A RenderViewport expected a child of type RenderSliver but received a child of type RenderDecoratedBox.

RenderObjects expect specific types of children because they coordinate with their children during layout and paint. For example, a RenderSliver cannot be the child of a RenderBox because a RenderSliver does not understand the RenderBox layout protocol.
The RenderViewport that expected a RenderSliver child was created by: Viewport ← IgnorePointer-[GlobalKey#77f73] ← Semantics ← _PointerListener ← Listener ← _GestureSemantics ← RawGestureDetector-[LabeledGlobalKey<RawGestureDetectorState>#ee4d1] ← _PointerListener ← Listener ← _ScrollableScope ← _ScrollSemantics-[GlobalKey#be6c5] ← RepaintBoundary ← ⋯
The RenderDecoratedBox that did not match the expected child type was created by: DecoratedBox ← DecoratedBoxTransition ← AutoScrollTag-[<0>] ← ExpandableTile ← Viewport ← IgnorePointer-[GlobalKey#77f73] ← Semantics ← _PointerListener ← Listener ← _GestureSemantics ← RawGestureDetector-[LabeledGlobalKey<RawGestureDetectorState>#ee4d1] ← _PointerListener ← ⋯
The relevant error-causing widget was
    AutoScrollTag-[<0>] 
lib\…\expandableTile\expandableTile.dart:51
When the exception was thrown, this was the stack
#0      ContainerRenderObjectMixin.debugValidateChild.<anonymous closure> 
package:flutter/…/rendering/object.dart:3037
#1      ContainerRenderObjectMixin.debugValidateChild 
package:flutter/…/rendering/object.dart:3064
#2      MultiChildRenderObjectElement.insertChildRenderObject 
package:flutter/…/widgets/framework.dart:5808
#3      RenderObjectElement.attachRenderObject 
package:flutter/…/widgets/framework.dart:5591
#4      RenderObjectElement.mount 
package:flutter/…/widgets/framework.dart:5331
...
════════════════════════════════════════════════════════════════════════════════

E/flutter ( 6337): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: 'package:scroll_to_index/scroll_to_index.dart': Failed assertion: line 332 pos 14: '(offsetToLastState?.offset ?? 0) >= 0': ERROR: %%%%%%%%%%%%%%: 3, 0, 1.0, RevealedOffset(offset: -252.0, rect: Rect.fromLTRB(20.0, 260.0, 340.0, 414.0)), 0
E/flutter ( 6337): #0      _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:40:39)
E/flutter ( 6337): #1      _AssertionError._throwNew (dart:core-patch/errors_patch.dart:36:5)
E/flutter ( 6337): #2      _SimpleAutoScrollController&ScrollController&AutoScrollControllerMixin._forecastMoveUnit (package:scroll_to_index/scroll_to_index.dart:332:14)
E/flutter ( 6337): #3      _SimpleAutoScrollController&ScrollController&AutoScrollControllerMixin._scrollToIndex (package:scroll_to_index/scroll_to_index.dart:251:28)
E/flutter ( 6337): <asynchronous suspension>
E/flutter ( 6337): #4      _SimpleAutoScrollController&ScrollController&AutoScrollControllerMixin.scrollToIndex.<anonymous closure> (package:scroll_to_index/scroll_to_index.dart:195:27)
E/flutter ( 6337): #5      co (package:scroll_to_index/util.dart:37:26)
E/flutter ( 6337): <asynchronous suspension>
E/flutter ( 6337): #6      _SimpleAutoScrollController&ScrollController&AutoScrollControllerMixin.scrollToIndex (package:scroll_to_index/scroll_to_index.dart:195:12)
E/flutter ( 6337): <asynchronous suspension>
E/flutter ( 6337): #7      DemandWidgetApp.getDemandJsonData.<anonymous closure> (package:mer_meta/demandVsSupply.dart:1897:28)
E/flutter ( 6337): #8      State.setState (package:flutter/src/widgets/framework.dart:1127:30)
E/flutter ( 6337): #9      DemandWidgetApp.getDemandJsonData (package:mer_meta/demandVsSupply.dart:1868:5)
E/flutter ( 6337): #10     _asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:77:64)
E/flutter ( 6337): #11     _rootRunUnary (dart:async/zone.dart:1132:38)
E/flutter ( 6337): #12     _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter ( 6337): #13     _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
E/flutter ( 6337): #14     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
E/flutter ( 6337): #15     Future._propagateToListeners (dart:async/future_impl.dart:668:32)
E/flutter ( 6337): #16     Future._complete (dart:async/future_impl.dart:473:7)
E/flutter ( 6337): #17     _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
E/flutter ( 6337): #18     _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:28:18)
E/flutter ( 6337): #19     _completeOnAsyncReturn (dart:async-patch/async_patch.dart:294:13)
E/flutter ( 6337): #20     BusinessLogic.methodGetDynamic (package:mer_meta/businessLogic.dart)
E/flutter ( 6337): #21     _asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:77:64)
E/flutter ( 6337): #22     _rootRunUnary (dart:async/zone.dart:1132:38)
E/flutter ( 6337): #23     _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter ( 6337): #24     _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
E/flutter ( 6337): #25     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
E/flutter ( 6337): #26     Future._propagateToListeners (dart:async/future_impl.dart:668:32)
E/flutter ( 6337): #27     Future._complete (dart:async/future_impl.dart:473:7)
E/flutter ( 6337): #28     _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
E/flutter ( 6337): #29     _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:28:18)
E/flutter ( 6337): #30     _completeOnAsyncReturn (dart:async-patch/async_patch.dart:294:13)
E/flutter ( 6337): #31     _withClient (package:http/http.dart)
E/flutter ( 6337): #32     _asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:77:64)
E/flutter ( 6337): #33     _rootRunUnary (dart:async/zone.dart:1132:38)
E/flutter ( 6337): #34     _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter ( 6337): #35     _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
E/flutter ( 6337): #36     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
E/flutter ( 6337): #37     Future._propagateToListeners (dart:async/future_impl.dart:668:32)
E/flutter ( 6337): #38     Future._completeWithValue (dart:async/future_impl.dart:483:5)
E/flutter ( 6337): #39     Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:513:7)
E/flutter ( 6337): #40     _rootRun (dart:async/zone.dart:1124:13)
E/flutter ( 6337): #41     _CustomZone.run (dart:async/zone.dart:1021:19)
E/flutter ( 6337): #42     _CustomZone.runGuarded (dart:async/zone.dart:923:7)
E/flutter ( 6337): #43     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
E/flutter ( 6337): #44     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
E/flutter ( 6337): #45     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
E/flutter ( 6337):

E/flutter ( 2392): Receiver: null
E/flutter ( 2392): Tried calling: offset
E/flutter ( 2392): #0      Object.noSuchMethod (dart:core-patch/object_patch.dart:53:5)
E/flutter ( 2392): #1      AutoScrollControllerMixin._forecastMoveUnit (package:scroll_to_index/scroll_to_index.dart:329:61)
E/flutter ( 2392): #2      AutoScrollControllerMixin._scrollToIndex (package:scroll_to_index/scroll_to_index.dart:251:28)
E/flutter ( 2392): <asynchronous suspension>
E/flutter ( 2392): #3      AutoScrollControllerMixin.scrollToIndex.<anonymous closure> (package:scroll_to_index/scroll_to_index.dart:195:27)
E/flutter ( 2392): #4      co (package:scroll_to_index/util.dart:37:26)
E/flutter ( 2392): #5      AutoScrollControllerMixin.scrollToIndex (package:scroll_to_index/scroll_to_index.dart:195:12)

E/flutter (12779): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: 'package:scroll_to_index/scroll_to_index.dart': Failed assertion: line 339 pos 14: '(offsetToLastState?.offset ?? 0) >= 0': ERROR: %%%%%%%%%%%%%%: 15, 0, 1.0, RevealedOffset(offset: -408.8262626669658, rect: Rect.fromLTRB(NaN, NaN, NaN, NaN)), 0,1,4,6,8,10,12,14,17,19,21,24,26,28,30,31,32,33,34,35,36,37,38,39,40
E/flutter (12779): #0      _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:46:39)
E/flutter (12779): #1      _AssertionError._throwNew (dart:core-patch/errors_patch.dart:36:5)
E/flutter (12779): #2      AutoScrollControllerMixin._forecastMoveUnit (package:scroll_to_index/scroll_to_index.dart:339:14)
E/flutter (12779): #3      AutoScrollControllerMixin._scrollToIndex (package:scroll_to_index/scroll_to_index.dart:252:28)
E/flutter (12779): <asynchronous suspension>
E/flutter (12779): #4      AutoScrollControllerMixin.scrollToIndex.<anonymous closure> (package:scroll_to_index/scroll_to_index.dart:196:27)
E/flutter (12779): #5      co (package:scroll_to_index/util.dart:37:26)
E/flutter (12779): #6      AutoScrollControllerMixin.scrollToIndex (package:scroll_to_index/scroll_to_index.dart:196:12)

[VERBOSE-2:ui_dart_state.cc(177)] Unhandled Exception: NoSuchMethodError: The method '_subFromInteger' was called on null.
Receiver: null
Tried calling: _subFromInteger(2)
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)
#1      int.- (dart:core-patch/integers.dart:13:38)
#2      AutoScrollControllerMixin._getNearestIndex (package:scroll_to_index/scroll_to_index.dart:357:19)
#3      AutoScrollControllerMixin._scrollToIndex (package:scroll_to_index/scroll_to_index.dart:251:25)
<asynchronous suspension>
#4      AutoScrollControllerMixin.scrollToIndex.<anonymous closure> (package:scroll_to_index/scroll_to_index.dart:196:27)
#5      co (package:scroll_to_index/util.dart:37:26)
#6      AutoScrollControllerMixin.scrollToIndex (package:scroll_to_index/scroll_to_index.dart:196:12)
#7      _ChatScreenState.item.<anonymous closure> (package:chat_pls/ui/chat/chat_screen.dart:382:30)
#8      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:993:19)
#9      _InkResponseS<…>

import 'dart:math' as math;
import 'package:flutter/material.dart';
import 'package:scroll_to_index/scroll_to_index.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Scroll To Index Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key}) : super(key: key);

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  static const maxCount = 100;
  final random = math.Random();
  final scrollDirection = Axis.vertical;
  AutoScrollController asc;
  int index;
  List<int> list;

  @override
  void initState() {
    super.initState();
    asc = AutoScrollController(
        viewportBoundaryGetter: () =>
            Rect.fromLTRB(0, 0, 0, MediaQuery.of(context).padding.bottom),
        axis: scrollDirection);

    /* this.list = List.generate(maxCount,
        (index) => <int>[index, (1000 * random.nextDouble()).toInt()]); */

    this.list = List.generate(100, (int i) {
      return i;
    });

    //for (int i in this.list) print(i);
  }

  Future _scrollToIndex(int scrollindex) async {
    //uncommenting the next line, (setting state) prevents yellow hightlight from showing up
    // if (this.mounted) setState(() {});

    // doesn't work
    /*  await asc.scrollToIndex(scrollindex,
        preferPosition: AutoScrollPosition.begin); */

    //works just fine
    asc.highlight(scrollindex);
  }

  Widget builditem(int i) {
    this.index++;
    // print(index);

    return AutoScrollTag(
        key: ValueKey(this.index),
        controller: asc,
        index: this.index,
        highlightColor: Colors.yellow,
        child: Container(
            decoration: BoxDecoration(
                border:
                    Border.all(width: 1.0, color: const Color(0xFFFFDFDFDF))),
            //height: screenSize.height / 6.0,
            padding: EdgeInsets.all(16.0),
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                //Text(room.roomguid),
                Expanded(
                    child: Column(
                        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: <Widget>[
                      Container(
                          padding: EdgeInsets.only(left: 10.0),
                          child: Row(children: <Widget>[
                            Expanded(
                              child: Text(
                                i.toString(),
                                style: TextStyle(fontSize: 22),
                              ),
                            )
                          ])),
                      Container(
                          padding: EdgeInsets.only(left: 10.0),
                          child: Row(children: <Widget>[
                            Expanded(
                              child: Text(
                                i.toString(),
                                style: TextStyle(fontSize: 22),
                              ),
                            )
                          ]))
                    ]))
              ],
            )));
  }

  @override
  Widget build(BuildContext context) {
    this.index = 0;
    return Scaffold(
      floatingActionButton: FloatingActionButton(
        heroTag: "scroll to..",
        onPressed: () {
          _scrollToIndex(15);
        },
      ),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: <Widget>[
          Expanded(
            child: SingleChildScrollView(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: this.list.map(builditem).toList(),
              ),
            ),
          )
        ],
      ),
    );
  }
}

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:scroll_to_index/scroll_to_index.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final AutoScrollController controller = AutoScrollController();
  final int index = 0;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: ListView(
            controller: controller,
            shrinkWrap: true,
            children: <Widget>[
              AutoScrollTag(
                key: ValueKey(index),
                controller: controller,
                index: index,
                highlightColor: Colors.redAccent,
                child: Container(
                  height: 50,
                  decoration: BoxDecoration(
                    border: Border.all()
                  ),
                ),
              ),
              RaisedButton(
                child: const Text("Highlight (setState later)"),
                onPressed: () {
                  controller.highlight(index);

                  Future.delayed(const Duration(seconds: 1), () {
                    setState(() {});
                  });
                },
              ),
              RaisedButton(
                child: const Text("Highlight (setState now)"),
                onPressed: () {
                  controller.highlight(index);

                  setState(() {});
                },
              ),
            ],
          ),
        ),
      ),
    );
  }
}