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Type Error #54

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knight-shade opened this issue May 8, 2018 · 1 comment
Closed

Type Error #54

knight-shade opened this issue May 8, 2018 · 1 comment

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@knight-shade
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knight-shade commented May 8, 2018 •
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Using a simple Pie chart i get the following exception:

I/flutter (16371): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
I/flutter (16371): The following assertion was thrown building RawGestureDetector(state:
I/flutter (16371): RawGestureDetectorState#5f730(gestures: [tap])):
I/flutter (16371): type '(Sales, int) => Color' is not a subtype of type '(dynamic, int) => Color'
I/flutter (16371): 
I/flutter (16371): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter (16371): more information in this error message to help you determine and fix the underlying cause.
I/flutter (16371): In either case, please report this assertion by filing a bug on GitHub:
I/flutter (16371):   https://github.com/flutter/flutter/issues/new
I/flutter (16371): 
I/flutter (16371): When the exception was thrown, this was the stack:
I/flutter (16371): #0      ArcRenderer.assignMissingColors.<anonymous closure> (package:charts_common/src/chart/pie/arc_renderer.dart:352:18)
I/flutter (16371): #1      List.forEach (dart:core/runtime/libgrowable_array.dart:274:8)
I/flutter (16371): #2      ArcRenderer.assignMissingColors (package:charts_common/src/chart/pie/arc_renderer.dart:351:16)
I/flutter (16371): #3      ArcRenderer.preprocessSeries (package:charts_common/src/chart/pie/arc_renderer.dart:70:5)
I/flutter (16371): #4      BaseChart.preprocessSeries.<anonymous closure> (package:charts_common/src/chart/common/base_chart.dart:382:37)
I/flutter (16371): #5      __InternalLinkedHashMap&_HashVMBase&MapMixin&_LinkedHashMapMixin.forEach (dart:collection/runtime/libcompact_hash.dart:363:8)
I/flutter (16371): #6      BaseChart.preprocessSeries (package:charts_common/src/chart/common/base_chart.dart:381:10)
I/flutter (16371): #7      BaseChart.drawInternal (package:charts_common/src/chart/common/base_chart.dart:339:29)
I/flutter (16371): #8      PieChart.drawInternal (package:charts_common/src/chart/pie/pie_chart.dart:41:11)
I/flutter (16371): #9      BaseChart.draw (package:charts_common/src/chart/common/base_chart.dart:308:5)
I/flutter (16371): #10     ChartContainerRenderObject.reconfigure (package:charts_flutter/src/chart_container.dart:109:14)
I/flutter (16371): #11     ChartContainer.createRenderObject (package:charts_flutter/src/chart_container.dart:56:52)
I/flutter (16371): #12     RenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4268:28)
I/flutter (16371): #13     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4645:11)
I/flutter (16371): #14     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #15     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #16     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4646:14)
I/flutter (16371): #17     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #18     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #19     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4646:14)
I/flutter (16371): #20     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #21     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #22     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #23     Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #24     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #25     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3761:11)
I/flutter (16371): #26     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #27     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #28     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #30     Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #31     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #32     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #33     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #34     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #35     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #36     Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #37     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #38     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #39     ParentDataElement.mount (package:flutter/src/widgets/framework.dart:3947:11)
I/flutter (16371): #40     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #41     MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4751:32)
I/flutter (16371): #42     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #43     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #44     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #45     Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #46     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #47     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3761:11)
I/flutter (16371): #48     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #49     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #50     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #52     Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #53     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #54     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #55     ParentDataElement.mount (package:flutter/src/widgets/framework.dart:3947:11)
I/flutter (16371): #56     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #57     MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4751:32)
I/flutter (16371): #58     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #59     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #60     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4646:14)
I/flutter (16371): #61     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #62     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #63     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4646:14)
I/flutter (16371): #64     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #65     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #66     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #67     Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #68     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #69     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #70     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #71     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #73     Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #74     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #75     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #76     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #77     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #78     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #79     Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #80     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #81     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #82     ParentDataElement.mount (package:flutter/src/widgets/framework.dart:3947:11)
I/flutter (16371): #83     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #84     MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4751:32)
I/flutter (16371): #85     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #86     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #87     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #88     Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #89     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #90     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3761:11)
I/flutter (16371): #91     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #92     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #93     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #94     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #95     Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #96     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #97     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #98     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #99     Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #100    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #101    Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #102    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #103    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3761:11)
I/flutter (16371): #104    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #105    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #106    Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #107    SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4646:14)
I/flutter (16371): #108    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #109    Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #110    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #111    Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #112    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #113    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #114    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #115    Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #116    SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4646:14)
I/flutter (16371): #117    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #118    Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #119    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #120    Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #121    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #122    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3761:11)
I/flutter (16371): #123    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #124    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #125    Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #126    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #127    Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #128    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)
I/flutter (16371): #129    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3761:11)
I/flutter (16371): #130    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3609:5)
I/flutter (16371): #131    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2899:14)
I/flutter (16371): #132    Element.updateChild (package:flutter/src/widgets/framework.dart:2702:12)
I/flutter (16371): #133    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3645:16)
I/flutter (16371): #134    Element.rebuild (package:flutter/src/widgets/framework.dart:3487:5)
I/flutter (16371): #135    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3614:5)

Code

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

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

class Charts extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Charts',
      home: MyCharts(),
    );
  }
}

class MyCharts extends StatefulWidget {
  @override
  _MyChartsState createState() => _MyChartsState();
}

class Sales {
  int year;
  int sales;
  charts.Color color;

  Sales(this.year, this.sales, this.color);

}

class _MyChartsState extends State<MyCharts> {

  List<Sales> _data;
  List<charts.Series<Sales, int>> _chartdata;



  void _makeData() {
    _chartdata = List<charts.Series<Sales, int>>();
    _data = <Sales>[
      Sales(0, 100, charts.MaterialPalette.red.shadeDefault),
      Sales(1, 75, charts.MaterialPalette.blue.shadeDefault),
      Sales(2, 25, charts.MaterialPalette.green.shadeDefault),
      Sales(3, 5, charts.MaterialPalette.yellow.shadeDefault),
    ];

    _chartdata.add( charts.Series(
      id: "sales",
      data: _data,
      colorFn: (sales, _) => sales.color,
      domainFn: (Sales sales, _) => sales.year,
      measureFn: (Sales sales, _) => sales.sales
    ));
  }

  @override
  void initState() {
    super.initState();
    _makeData();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Pie Charts'),
        centerTitle: true,
      ),
      body: Container(
        padding: EdgeInsets.all(32.0),
        child: Center(
          child: Column(
            children: <Widget>[
              Text('Sales data'),
              Expanded(child: charts.PieChart<Sales, int>(
                _chartdata,
                animate: true,
                animationDuration: Duration(seconds: 2),
              ),)
            ],
          ),
        ),
      ),
    );
  }
}

Flutter doctor

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, v0.3.1, on Linux, locale en_IN)
[✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
[✓] Android Studio (version 3.1)
[✓] IntelliJ IDEA Ultimate Edition (version 2018.1)
[✓] Connected devices (1 available)

• No issues found!
@lorrainekan
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Hi, we just synced the latest code that cleaned up our API. Because of the new API, you can now create the chart without the generics charts.PieChart(_chartData..

I also noticed that when adding to _chartData, the series is not typed, even though your list is typed charts.Series<Sales, int>. Please fix this.

@reeteshverma39 reeteshverma39 mentioned this issue Jun 30, 2018
Closed
@rtolar rtolar mentioned this issue Jul 12, 2018
Open
@Nik99 Nik99 mentioned this issue Sep 10, 2018
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@TomOerlemans TomOerlemans mentioned this issue Nov 25, 2018
Open
@2intor 2intor mentioned this issue Apr 16, 2019
Open
@renzorodrigues renzorodrigues mentioned this issue Jun 15, 2019
Open
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@knight-shade @lorrainekan