flutter_spinning_wheel

Description:

flutter spinning wheel

flutter_spinning_wheel #

A customizable widget to use as a spinning wheel in Flutter.
Getting Started #

Installation
Basic Usage
Constructor
Use Cases

Installation #
Add

flutter_spinning_wheel : ^lastest_version

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to your pubspec.yaml, and run
flutter packages get
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in your project's root directory.
Basic Usage #
Create a new project with command
flutter create myapp
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Edit lib/main.dart like this:
import 'package:flutter/material.dart';

import 'package:flutter_circular_slider/flutter_circular_slider.dart';

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

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

class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.blueGrey,
body: Center(
child: Container(child:
SpinningWheel(
Image.asset('assets/images/wheel-6-300.png'),
width: 310,
height: 310,
dividers: 6,
onEnd: _dividerController.add,
),
),
));
}
}
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You can replace the image with one of your preference.



Basic
Game









Constructor #



Parameter
Default
Description




image

The image to be used as wheel.


dividers

The number of divisions in the image. It's important that all divisions are equal.


height

Height of the container that will display the wheel.


width

Width of the container that will display the wheel.


initialSpinAngle
0.0
Initial rotation angle for the wheel, so the wheel could look initialy rotated.


spinResistance
0.5
From >0.0 to 1.0 will be used to calculate the speed and deceleration of the wheel.


canInteractWhileSpinning
true
If set to false, once the animation starts the user won't be able to stop it.


secondaryImage

Secondary image that will be rendered on top of the wheel and won't be affected by the animation.


secondaryImageHeight

Height for the secondary image.


secondaryImageWidth

Width for the secondary image.


secondaryImageTop

Used to fine tune the position of the secondary image. Otherwise it will be centered.


secondaryImageLeft

Used to fine tune the position of the secondary image. Otherwise it will be centered.


onUpdate
void onUpdate(int value)
Callback function executed when the selected divider changes during the animation.


onEnd
void onEnd(int value)
Callback function executed when the animation stops.


shouldStartOrStop

Stream



Use Cases #
Game
import 'dart:async';
import 'dart:math';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_spinning_wheel/flutter_spinning_wheel.dart';

void main() {
SystemChrome.setEnabledSystemUIOverlays([]);
runApp(MyApp());
}

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

class MyHomePage extends StatelessWidget {
final StreamController _dividerController = StreamController<int>();

dispose() {
_dividerController.close();
}

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(backgroundColor: Color(0xffDDC3FF), elevation: 0.0),
backgroundColor: Color(0xffDDC3FF),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
SpinningWheel(
Image.asset('assets/images/roulette-8-300.png'),
width: 310,
height: 310,
initialSpinAngle: _generateRandomAngle(),
spinResistance: 0.6,
canInteractWhileSpinning: false,
dividers: 8,
onUpdate: _dividerController.add,
onEnd: _dividerController.add,
secondaryImage:
Image.asset('assets/images/roulette-center-300.png'),
secondaryImageHeight: 110,
secondaryImageWidth: 110,
),
SizedBox(height: 30),
StreamBuilder(
stream: _dividerController.stream,
builder: (context, snapshot) =>
snapshot.hasData ? RouletteScore(snapshot.data) : Container(),
)
],
),
),
);
}

double _generateRandomAngle() => Random().nextDouble() * pi * 2;
}

class RouletteScore extends StatelessWidget {
final int selected;

final Map<int, String> labels = {
1: '1000\$',
2: '400\$',
3: '800\$',
4: '7000\$',
5: '5000\$',
6: '300\$',
7: '2000\$',
8: '100\$',
};

RouletteScore(this.selected);

@override
Widget build(BuildContext context) {
return Text('${labels[selected]}',
style: TextStyle(fontStyle: FontStyle.italic, fontSize: 24.0));
}
}
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