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Migrate radar_chart to use render object for drawing
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| import 'package:fl_chart/fl_chart.dart'; | ||
| import 'package:flutter/cupertino.dart'; | ||
| import 'package:flutter/foundation.dart'; | ||
| import 'package:flutter/gestures.dart'; | ||
| import 'package:flutter/rendering.dart'; | ||
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| import 'radar_chart_painter.dart'; | ||
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| class RadarChartLeaf extends LeafRenderObjectWidget { | ||
| const RadarChartLeaf({Key? key, required this.data, required this.targetData, this.touchCallback}) | ||
| : super(key: key); | ||
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| final RadarChartData data, targetData; | ||
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| final RadarTouchCallback? touchCallback; | ||
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| @override | ||
| RenderRadarChart createRenderObject(BuildContext context) => | ||
| RenderRadarChart(data, targetData, MediaQuery.of(context).textScaleFactor, touchCallback); | ||
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| @override | ||
| void updateRenderObject(BuildContext context, RenderRadarChart renderObject) { | ||
| renderObject | ||
| ..data = data | ||
| ..targetData = targetData | ||
| ..textScale = MediaQuery.of(context).textScaleFactor | ||
| ..touchCallback = touchCallback; | ||
| } | ||
| } | ||
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| class RenderRadarChart extends RenderBox { | ||
| RenderRadarChart(RadarChartData data, RadarChartData targetData, double textScale, | ||
| RadarTouchCallback? touchCallback) | ||
| : _data = data, | ||
| _targetData = targetData, | ||
| _textScale = textScale, | ||
| _touchCallback = touchCallback; | ||
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| RadarChartData get data => _data; | ||
| RadarChartData _data; | ||
| set data(RadarChartData value) { | ||
| if (_data == value) return; | ||
| _data = value; | ||
| markNeedsPaint(); | ||
| } | ||
|
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| RadarChartData get targetData => _targetData; | ||
| RadarChartData _targetData; | ||
| set targetData(RadarChartData value) { | ||
| if (_targetData == value) return; | ||
| _targetData = value; | ||
| markNeedsPaint(); | ||
| } | ||
|
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| double get textScale => _textScale; | ||
| double _textScale; | ||
| set textScale(double value) { | ||
| if (_textScale == value) return; | ||
| _textScale = value; | ||
| markNeedsPaint(); | ||
| } | ||
|
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| RadarTouchCallback? _touchCallback; | ||
| set touchCallback(RadarTouchCallback? value) { | ||
| _touchCallback = value; | ||
| } | ||
|
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| late RadarChartPainter _painter; | ||
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| @override | ||
| void performLayout() { | ||
| size = computeDryLayout(constraints); | ||
| } | ||
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| @override | ||
| Size computeDryLayout(BoxConstraints constraints) { | ||
| return Size(constraints.maxWidth, constraints.maxHeight); | ||
| } | ||
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| @override | ||
| void paint(PaintingContext context, Offset offset) { | ||
| final canvas = context.canvas; | ||
| canvas.save(); | ||
| canvas.translate(offset.dx, offset.dy); | ||
|
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| _painter = RadarChartPainter(data, targetData, textScale: textScale); | ||
| _painter.paint(canvas, size); | ||
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| canvas.restore(); | ||
| } | ||
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| @override | ||
| bool hitTestSelf(Offset position) => true; | ||
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| @override | ||
| void handleEvent(PointerEvent event, covariant BoxHitTestEntry entry) { | ||
| _touchCallback?.call(_painter.handleTouch(event, size)); | ||
| } | ||
| } |