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RangeSlider Widget for Flutter

RangeSlider An extension of the Flutter Material Slider to allow selection of a range of values via 2 thumbs. Step by step explanation A full explanat
Information
Category: Flutter / Sliders
Watchers: 7
Star: 364
Fork: 64
Last update: Mar 9, 2023
Resource links
https://github.com/boeledi/RangeSlider

RangeSlider

An extension of the Flutter Material Slider to allow selection of a range of values via 2 thumbs.

Flutter RangeSlider



Step by step explanation

A full explanation on how to build such Widget may be found on my blog:

  • in English, click here
  • in French, click here

Getting Started

You should ensure that you add the following dependency in your Flutter project.

dependencies:
 flutter_range_slider: "^1.4.0"

You should then run flutter packages upgrade or update your packages in IntelliJ.

In your Dart code, to use it:

import 'package:flutter_range_slider/flutter_range_slider.dart' as frs;

IMPORTANT NOTE


> As of version 1.7, Flutter Framework also has its own RangeSlider. > If you want to keep working with this library, you need to import the package, using an alias e.g. frs. > Then, your need to prefix both RangeSlider and RangeSliderCallback with this alias (frs.RangeSlider and frs.RangeSliderCallback)

Example

An example can be found in the example folder. Check it out.

14 Open More issues
Closed

Thumbs not rendering - Flutter 1.20

I am just beginning to work with the RangeSlider widget. When trying to render a simple RangeSlider, encountering the following:

══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════
The following NoSuchMethodError was thrown during paint():
The getter 'isEmpty' was called on null.
Receiver: null
Tried calling: isEmpty

When the exception was thrown, this was the stack:
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)
#1      RoundSliderThumbShape.paint (package:flutter/src/material/slider_theme.dart:2395:30)
#2      _RenderRangeSlider._paintThumbs (package:flutter_range_slider/src/flutter_range_slider.dart:1043:29)
#3      _RenderRangeSlider.paint (package:flutter_range_slider/src/flutter_range_slider.dart:914:5)
#4      RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2266:7)
#5      PaintingContext.paintChild (package:flutter/src/rendering/object.dart:186:13)
#6      RenderShiftedBox.paint (package:flutter/src/rendering/shifted_box.dart:72:15)
#7      RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2266:7)
#8      PaintingContext.paintChild (package:flutter/src/rendering/object.dart:186:13)
#9      RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2525:15)
#10     RenderFlex.paint (package:flutter/src/rendering/flex.dart:969:7)
#11     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2266:7)
#12     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:186:13)
#13     RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2525:15)
#14     RenderCustomMultiChildLayoutBox.paint (package:flutter/src/rendering/custom_layout.dart:406:5)
#15     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2266:7)
#16     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:186:13)
#17     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:133:15)
#18     _RenderInkFeatures.paint (package:flutter/src/material/material.dart:533:11)
#19     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2266:7)
#20     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:186:13)
#21     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:133:15)
#22     PaintingContext.pushLayer (package:flutter/src/rendering/object.dart:393:12)
#23     RenderPhysicalModel.paint (package:flutter/src/rendering/proxy_box.dart:1821:15)
#24     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2266:7)
#25     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:186:13)
#26     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:133:15)
#27     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2266:7)
#28     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:186:13)
#29     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:133:15)
#30     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2266:7)
#31     PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:137:11)
#32     PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:97:5)
#33     PipelineOwner.flushPaint (package:flutter/src/rendering/object.dart:982:29)
#34     RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:406:19)
#35     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:867:13)
#36     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:286:5)
#37     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1117:15)
#38     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1056:9)
#39     SchedulerBinding.scheduleWarmUpFrame.<anonymous closure> (package:flutter/src/scheduler/binding.dart:865:7)
(elided 4 frames from class _RawReceivePortImpl, class _Timer, and dart:async-patch)

The following RenderObject was being processed when the exception was fired: _RenderRangeSlider#32f2f:
  creator: _RangeSliderRenderObjectWidget ← RangeSlider ← SliderTheme ← Padding ← Container ← Column ←
    _BodyBuilder ← MediaQuery ← LayoutId-[<_ScaffoldSlot.body>] ← CustomMultiChildLayout ←
    AnimatedBuilder ← DefaultTextStyle ← ⋯
  parentData: offset=Offset(20.0, 20.0) (can use size)
  constraints: BoxConstraints(0.0<=w<=374.0, 0.0<=h<=Infinity)
  size: Size(374.0, 32.0)
This RenderObject has no descendants.

In RoundSliderThumbShape.paint, it is expecting an argument of type Size called sizeWithOverflow which is not being passed.

opened Aug 31, 2020 by pastordougdev 6
Closed

Increase thumb touch area to start dragging gesture

I had complaint from my users that the slider was difficult to use.

opened Sep 27, 2018 by jeroentrappers 6
Closed

RangeSlider does not reflect trackHeight slider theme customization

Problem Description

flutter_range_slider: ^1.2.0

When I override the slider theme track height, the standard Slider widget reflects the change, but the RangeSlider does not.

Code to Reproduce

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'RangeSlider Demo',
      theme: _buildTheme(context),
      home: RangeSliderSample(),
    );
  }

  ThemeData _buildTheme(BuildContext context) {
    return ThemeData(
        // https://docs.flutter.io/flutter/material/SliderThemeData-class.html
        sliderTheme: SliderTheme.of(context).copyWith(
      activeTrackColor: Colors.green,
      inactiveTrackColor: Colors.green,
      trackHeight: 8.0,  // ******** RangeSlider does not reflect track height customization
    ));
  }
}

class RangeSliderSample extends StatefulWidget {
  @override
  _RangeSliderSampleState createState() => _RangeSliderSampleState();
}

class _RangeSliderSampleState extends State<RangeSliderSample> {
  double _sliderValue = 50;
  double _rangeLoValue = 25;
  double _rangeHiValue = 50;

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

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Scaffold(
        appBar: AppBar(title: Text('RangeSlider Demo')),
        body: Container(
          padding: const EdgeInsets.only(top: 50.0, left: 10.0, right: 10.0),
          child: Column(children: [
            Slider(
              min: 1.0,
              max: 100.0,
              value: _sliderValue,
              onChanged: (double newValue) {
                setState(() {
                  _sliderValue = newValue;
                });
              },
            ),
            SizedBox(height: 50),
            RangeSlider(
              min: 1.0,
              max: 100.0,
              lowerValue: _rangeLoValue,
              upperValue: _rangeHiValue,
              onChanged: ((double newLowerValue, double newUpperValue) {
                setState(() {
                  _rangeLoValue = newLowerValue;
                  _rangeHiValue = newUpperValue;
                });
              }),
            ),
          ]),
        ),
      ),
    );
  }
}

Expected Behavior

The RangeSlider should reflect all slider theme customizations.

opened May 13, 2019 by mjschaefer9395 5
Closed

Performance on moving : slow movement

Hi,

I would like to use your package to restrict the number of Custom widgets (in a column) depending on the range choosen by the user. So I used your "RangeSlider".

Unfortunatly, I have seriously performance problem during the movement of the cursor. Even if I only put onChanged: (double newLowerValue, double newUpperValue) { setState(() { _lowerValue = newLowerValue; _upperValue = newUpperValue; }); }, ) the problem is still present.

I saw that if I show only 10 items (manually) of my Custom Widget, the problem disappear, if I show 20-30 it begins to be bad...

So the performance of the cursor moving is indirectly lied to the numbers of elements show on the same page. It's the same with the default widget RangeSlider of Flutter.

Do you know why that is happens ?

Thank you in advance for your help !

opened Nov 19, 2020 by chamartt 4
Closed

slider not work with new version of flutter

the plugin not work with the new version of flutter : v1.5.7

opened Apr 26, 2019 by bahrinb55 4
Closed

lowerValue and upperValue most be as String

hi i want to set slider range for money range! and i cant set value as decimal format! I think it was better set as String :\

opened Feb 26, 2019 by mohrezani 4
Open

Convert 'body2' into 'bodyText1' for theme

for update version of flutter instead of body2 we should use bodyText1.

opened Jan 3, 2022 by mohhamad-esmaili 0
Open

Fix Deprecated body2

TextTheme.body2 is deprecated. now in flutter 2.5 it is TextTheme.bodyText2.

opened Sep 16, 2021 by mozaffari 1
Open

Error: No named parameter with the name 'sizeWithOverflow'

Compiler message: /D:/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_range_slider-1.5.0/lib/src/flutter_range_slider.dart:1059:7: Error: No named parameter with the name 'sizeWithOverflow'. sizeWithOverflow: sizeWithOverflow,

guys please help me with this....!

opened Jul 29, 2021 by nilu10 0
Open

Null Safety?

HI,

Awesome package, are you going to upgrade to null sound safety?

Thanks

opened Jun 21, 2021 by Bilonik 1
Open

Migrate to null safety

It's a request for use your plugin with flutter 2.0 and null safety

opened Apr 29, 2021 by guillaume-fortin-keyneosoft 0
Open

Is it a way to have values from min up to max-to-infinite

Hi,

I need to range my sider from min to max values. If the max cursor is moved at the end of the track, the upperValue must be infinite.

Is it a simple way to do this and display to the user on the live value indicator that he's selecting max and upper values? I can't setState on onChanged method for performance needs.

In perfect world, I would live have 1 to 5, and if the user move the cursor after 5, the upperValue should be inifinite and it should be writted on the value indicator.

Thank you for your help !

opened Nov 23, 2020 by chamartt 1

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