Slider Widget In Flutter

A slider is a graphical user interface (GUI) element that allows users to select a value from a range of values. The slider can be used to select from either a continuous or a discrete set of values.

Continuous values are values that can be selected anywhere within the range. For example, if the range of values is from 0 to 100, a continuous value could be 50.5.

Discrete values are values that can only be selected from a specific set of values. For example, if the range of values is from 0 to 100 and the divisions is 5, then the discrete values would be 0, 20, 40, 60, 80, and 100.

The default behavior of a slider is to use continuous values. To use discrete values, you need to set the divisions' property to a non-null value. The divisions' property indicates the number of discrete intervals in the range of values.

For example, if the min property is 0.0, the max property is 50.0, and the divisions' property is 5, then the slider will have 5 discrete values: 0.0, 10.0, 20.0, 30.0, 40.0, and 50.0.

Here is an example of how a slider with discrete values might be used. Let’s say you are designing a GUI for a music player. You could use a slider with discrete values to allow the user to select the playback speed. The slider could have 10 discrete values, each representing a different playback speed. For example, the first discrete value could be 1x, the second discrete value could be 2x, the third discrete value could be 3x, and so on.

Here is an example of the basic slider widget code:

import 'package:flutter/material.dart';

/// Flutter code sample for [Slider].

void main() => runApp(const SliderApp());

class SliderApp extends StatelessWidget {
  const SliderApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: SliderExample(),
    );
  }
}

class SliderExample extends StatefulWidget {
  const SliderExample({super.key});

  @override
  State<SliderExample> createState() => _SliderExampleState();
}

class _SliderExampleState extends State<SliderExample> {
  double _currentSliderValue = 20;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Slider')),
      body: Slider(
        value: _currentSliderValue,
        max: 100,
        divisions: 5,
        label: _currentSliderValue.round().toString(),
        onChanged: (double value) {
          setState(() {
            _currentSliderValue = value;
          });
        },
      ),
    );
  }
}

The Flutter team has provided a basic slider widget code in the Material theme. This code can be used to create a simple slider that allows users to select a value from a range of values. However, if you want to create a more customized slider, you can also do that by referring to the Flutter documentation.

The Flutter documentation provides detailed information on how to customize the slider widget. You can change the appearance of the slider, such as the color of the track, the shape of the thumb, and the text that is displayed next to the thumb. You can also change the behavior of the slider, such as the way that the value is updated when the user drags the thumb.

This code creates a simple slider that allows users to select a value from 0 to 100. The value of the slider is initially set to 50. When the user drags the thumb, the value of the slider is updated.

For more information on how to customize the slider widget, please refer to the Flutter documentation: https://api.flutter.dev/flutter/material/Slider-class.html

I hope you enjoyed this story! If you did, please share it with your friends or follow me for more content like this. Thank you for reading!