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KanybekMomukeyev/ListTileExample.dart

Created February 14, 2020 09:46
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  1. KanybekMomukeyev created this gist Feb 14, 2020.
    125 changes: 125 additions & 0 deletions ListTileExample.dart
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,125 @@
    import 'package:flutter/material.dart';

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

    class MyApp extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
    return new MaterialApp(
    title: 'NonStopIO',
    theme: new ThemeData(
    primarySwatch: Colors.red,
    ),
    home: new MyHomePage(),
    );
    }
    }

    class MyHomePage extends StatefulWidget {
    @override
    _MyHomePageState createState() => new _MyHomePageState();
    }

    class _MyHomePageState extends State<MyHomePage> {
    bool longPressFlag = false;
    List<Element> indexList = new List();

    onelement_selected(int index){
    setState((){
    indexList[index].isselected=!indexList[index].isselected;
    });

    }
    void longPress() {
    setState(() {
    if (indexList.isEmpty) {
    longPressFlag = false;
    } else {
    longPressFlag = true;
    }
    });
    }

    @override
    Widget build(BuildContext context) {
    for(var i=0;i<15;i++){
    indexList.add(Element(isselected: false));
    }

    return new Scaffold(
    appBar: new AppBar(
    title: new Text('Selected ${indexList.length} ' + indexList.toString()),
    ),
    body: new ListView.builder(
    itemCount: 15,
    itemBuilder: (context, index) {
    return new CustomWidget(
    index: index,
    isselected: indexList[index].isselected,

    longPressEnabled: longPressFlag,
    callback: () {
    onelement_selected(index);
    if (indexList.contains(index)) {
    indexList.remove(index);
    } else {
    indexList.add(Element());
    }

    longPress();
    },
    );
    },
    ),
    floatingActionButton: new FloatingActionButton(
    onPressed: () {},
    tooltip: 'Increment',
    child: new Icon(Icons.add),
    ), // This trailing comma makes auto-formatting nicer for build methods.
    );
    }
    }

    class CustomWidget extends StatefulWidget {
    final int index;
    final bool longPressEnabled;
    final VoidCallback callback;
    final bool isselected;

    const CustomWidget({Key key, this.index, this.longPressEnabled, this.callback,this.isselected}) : super(key: key);

    @override
    _CustomWidgetState createState() => new _CustomWidgetState();
    }

    class _CustomWidgetState extends State<CustomWidget> {
    bool selected = false;

    @override
    Widget build(BuildContext context) {
    return new GestureDetector(
    onLongPress: () {
    widget.callback();
    },
    onTap: () {
    if (widget.longPressEnabled) {
    widget.callback();
    }
    },
    child: new Container(
    margin: new EdgeInsets.all(5.0),
    child: new ListTile(
    title: new Text("Title ${widget.index}"),
    subtitle: new Text("Description ${widget.index}"),
    ),
    decoration: widget.isselected
    ? new BoxDecoration(color: Colors.black38, border: new Border.all(color: Colors.black))
    : new BoxDecoration(),
    ),
    );
    }
    }
    class Element{
    bool isselected;
    Element({this.isselected});
    }