27 lines
691 B
Dart
27 lines
691 B
Dart
import 'package:flutter/material.dart';
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class LineChartPainter extends CustomPainter {
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final List<double> data;
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LineChartPainter(this.data);
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@override
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void paint(Canvas canvas, Size size) {
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// Calculate the scale factor.
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final scaleFactor = size.height / 240;
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// Draw the line chart.
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for (var i = 0; i < data.length - 1; i++) {
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final x1 = i * size.width / data.length;
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final y1 = data[i] * scaleFactor;
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final x2 = (i + 1) * size.width / data.length;
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final y2 = data[i + 1] * scaleFactor;
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canvas.drawLine(Offset(x1, y1), Offset(x2, y2), Paint());
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}
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}
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@override
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bool shouldRepaint(LineChartPainter oldDelegate) => false;
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}
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