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feat: support always animating state changes with
Animated (#40)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,236 @@ | ||
| import 'package:fleet/fleet.dart'; | ||
| import 'package:flutter/material.dart'; | ||
|
|
||
| void main() { | ||
| runApp(const App()); | ||
| } | ||
|
|
||
| class App extends StatelessWidget { | ||
| const App({super.key}); | ||
|
|
||
| @override | ||
| Widget build(BuildContext context) { | ||
| return const MaterialApp( | ||
| debugShowCheckedModeBanner: false, | ||
| home: Page(), | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| class Page extends StatefulWidget { | ||
| const Page({super.key}); | ||
|
|
||
| @override | ||
| State<Page> createState() => _PageState(); | ||
| } | ||
|
|
||
| class _PageState extends State<Page> { | ||
| var _observation = Observation.heartRate; | ||
|
|
||
| @override | ||
| Widget build(BuildContext context) { | ||
| return Scaffold( | ||
| body: Center( | ||
| child: Column( | ||
| mainAxisSize: MainAxisSize.min, | ||
| children: [ | ||
| SegmentedButton<Observation>( | ||
| segments: const [ | ||
| ButtonSegment( | ||
| value: Observation.heartRate, | ||
| label: Text('Heart Rate'), | ||
| ), | ||
| ButtonSegment( | ||
| value: Observation.pace, | ||
| label: Text('Pace'), | ||
| ), | ||
| ], | ||
| selected: {_observation}, | ||
| onSelectionChanged: (selection) { | ||
| setState(() { | ||
| _observation = selection.single; | ||
| }); | ||
| }, | ||
| ), | ||
| const SizedBox(height: 10), | ||
| SizedBox( | ||
| width: 400, | ||
| height: 200, | ||
| child: HikeGraph( | ||
| hike: hike, | ||
| observation: _observation, | ||
| ), | ||
| ) | ||
| ], | ||
| ), | ||
| ), | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| AnimationSpec ripple(int index) { | ||
| return Curves.bounceOut.animation().delay(Duration(milliseconds: 30 * index)); | ||
| } | ||
|
|
||
| extension on Widget { | ||
| Widget animation(AnimationSpec animation) { | ||
| return Animated( | ||
| animation: animation, | ||
| child: this, | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| class HikeGraph extends StatelessWidget { | ||
| const HikeGraph({ | ||
| super.key, | ||
| required this.hike, | ||
| required this.observation, | ||
| }); | ||
|
|
||
| final Hike hike; | ||
| final Observation observation; | ||
|
|
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| Color get color { | ||
| switch (observation) { | ||
| case Observation.heartRate: | ||
| return Colors.red; | ||
| case Observation.pace: | ||
| return Colors.blue; | ||
| } | ||
| } | ||
|
|
||
| @override | ||
| Widget build(BuildContext context) { | ||
| final data = hike.observations[observation]!; | ||
| final overallRange = data.overallRange; | ||
|
|
||
| return LayoutBuilder( | ||
| builder: (context, constraints) { | ||
| final spacing = constraints.maxWidth / 120; | ||
| return Row( | ||
| crossAxisAlignment: CrossAxisAlignment.end, | ||
| children: [ | ||
| for (var i = 0; i < data.length; i++) ...[ | ||
| GraphCapsule( | ||
| color: color, | ||
| height: constraints.maxHeight, | ||
| range: data[i], | ||
| overallRange: overallRange, | ||
| ).animation(ripple(i)), | ||
| if (i < data.length - 1) SizedBox(width: spacing) | ||
| ], | ||
| ], | ||
| ); | ||
| }, | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| class GraphCapsule extends StatelessWidget { | ||
| const GraphCapsule({ | ||
| super.key, | ||
| required this.color, | ||
| required this.height, | ||
| required this.range, | ||
| required this.overallRange, | ||
| }); | ||
|
|
||
| final Color color; | ||
| final double height; | ||
| final Range range; | ||
| final Range overallRange; | ||
|
|
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| @override | ||
| Widget build(BuildContext context) { | ||
| final relativeRange = range.relativeTo(overallRange); | ||
| return Column( | ||
| mainAxisSize: MainAxisSize.min, | ||
| children: [ | ||
| AContainer( | ||
| height: height * relativeRange.magnitude, | ||
| width: 24, | ||
| decoration: ShapeDecoration( | ||
| shape: const StadiumBorder(), | ||
| color: color, | ||
| ), | ||
| ), | ||
| ASizedBox( | ||
| height: height * relativeRange.min, | ||
| ) | ||
| ], | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| class Range { | ||
| Range({required this.min, required this.max}); | ||
|
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| final double min; | ||
| final double max; | ||
|
|
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| double get magnitude => max - min; | ||
|
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| Range combine(Range other) { | ||
| return Range( | ||
| min: min < other.min ? min : other.min, | ||
| max: max > other.max ? max : other.max, | ||
| ); | ||
| } | ||
|
|
||
| Range relativeTo(Range other) { | ||
| return Range( | ||
| min: (min - other.min) / other.magnitude, | ||
| max: (max - other.min) / other.magnitude, | ||
| ); | ||
| } | ||
| } | ||
|
|
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| extension on Iterable<Range> { | ||
| Range get overallRange => | ||
| reduce((overallRange, range) => overallRange.combine(range)); | ||
| } | ||
|
|
||
| enum Observation { | ||
| heartRate, | ||
| pace, | ||
| } | ||
|
|
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| class Hike { | ||
| Hike({required this.observations}); | ||
|
|
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| final Map<Observation, List<Range>> observations; | ||
| } | ||
|
|
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| final hike = Hike( | ||
| observations: { | ||
| Observation.heartRate: [ | ||
| Range(min: 10, max: 20), | ||
| Range(min: 15, max: 25), | ||
| Range(min: 30, max: 40), | ||
| Range(min: 35, max: 50), | ||
| Range(min: 40, max: 50), | ||
| Range(min: 50, max: 60), | ||
| Range(min: 40, max: 70), | ||
| Range(min: 20, max: 50), | ||
| Range(min: 25, max: 45), | ||
| Range(min: 30, max: 40), | ||
| Range(min: 25, max: 35), | ||
| Range(min: 30, max: 45), | ||
| ], | ||
| Observation.pace: [ | ||
| Range(min: 30, max: 45), | ||
| Range(min: 25, max: 35), | ||
| Range(min: 30, max: 40), | ||
| Range(min: 25, max: 45), | ||
| Range(min: 40, max: 55), | ||
| Range(min: 35, max: 65), | ||
| Range(min: 50, max: 60), | ||
| Range(min: 40, max: 50), | ||
| Range(min: 35, max: 50), | ||
| Range(min: 30, max: 40), | ||
| Range(min: 15, max: 25), | ||
| Range(min: 10, max: 20), | ||
| ] | ||
| }, | ||
| ); |
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