CheckboxListTile

 import "package:flutter/material.dart";

void main()
{
  runApp(const MyApp());
}
class MyApp extends StatelessWidget
{
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: "CheckBoxListTile",
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.grey,
      ),
      home: const CheckPractice(),
    );
  }
}
class CheckPractice extends StatefulWidget
{
  const CheckPractice({super.key});

  @override
  State<CheckPractice> createState() => _CheckPracticeState();
}

class _CheckPracticeState extends State<CheckPractice> {

  /// value set to false
  bool _value1 = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("CheckBoxListTile"),
        centerTitle: true,
        backgroundColor: Colors.grey,
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Container(
              width: 500.0,
              decoration: BoxDecoration(
                border: Border.all(color: Colors.brown),
                borderRadius: BorderRadius.circular(20.0),
              ),
              child: CheckboxListTile(
                title: const Text("CheckboxListTile 1", style: TextStyle(fontWeight: FontWeight.bold),),
                subtitle: const Text("CheckboxListTile is a built-in widget in flutter. We can say it a combination"
                    " of CheckBox with a ListTile. Its properties such as value, activeColor, and"
                    " checkColor are similar to the CheckBox widget, and title, subtitle,"
                    " contentPadding, etc are similar to the ListTile widget."),
                secondary: const CircleAvatar(
                  backgroundImage: NetworkImage(
                      "https://upload.wikimedia.org/wikipedia/commons/b/b6/Image_created_with_a_mobile_phone.png"),
                  radius: 20.0,
                ),
                autofocus: false,
                isThreeLine: true,
                activeColor: Colors.green,
                selected: _value1,
                // dense: true,
                value: _value1,
                onChanged: (value) {
                  setState(() {
                    _value1 = value!;
                  });
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}

///Properties of CheckboxListTile Widget:
//
/// activeColor: This widget takes in the Color class as the object to assign the checkbox a color
/// when it is checked.
// autofocus: This property takes in a boolean as the value to divide whether the widget will be
// selected on the initial focus or not.
/// checkColor: This property assigns a color to the check icon by taking in the Color class as the object.
// contentPadding: This property is responsible to assign empty space inside the widget by taking
// in EdgeInsetsGeometry class as the object.
/// controlAffinity: The controlAffinity property holds the ListTileControlAffinity class as the
/// object to decide the location of action in respect to text inside the widget.
// dense: The dense property takes in a boolean as the object whether is associated with the
// vertical dense list.
/// isThreeLine: This property also takes in a boolean as the object to decide whether the text
/// in the widget will be printed till the third line.
// onChanged: This property takes in Valuechanged<bool> as the object. This property is responsible
// for the change in the checkbox.
/// secondary: The secondary property holds a widget as the object to be displayed on the opposite
/// side of the checkbox.
// selected:  This property takes in a boolean value as the object to decide whether the checkbox
// will be already selected or not.
/// subtitle: The subtitle property holds a widget as the object to be displayed below the title.
/// Usually, this widget is Text.
// title: This property also takes in a widget as the object to be displayed as the title of the
// CheckBoxListTile, usually, it is Text widget.
/// tristate: This property holds a boolean as the object. If it is set to true the values in the
/// checkbox can either true, false, or null.
// value: This property also takes in a boolean as the object to control whether the checkbox is
// selected or not.