46 lines
1.1 KiB
Dart
46 lines
1.1 KiB
Dart
import 'package:flutter/cupertino.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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/// create by 张风捷特烈 on 2020-03-19
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/// contact me by email 1981462002@qq.com
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/// 说明: 纸
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class Paper extends StatelessWidget {
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const Paper({super.key});
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@override
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Widget build(BuildContext context) {
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return Container(
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color: Colors.white,
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child: CustomPaint( // 使用CustomPaint
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painter: PaperPainter(),
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),
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);
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}
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}
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class PaperPainter extends CustomPainter {
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@override
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void paint(Canvas canvas, Size size) {
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var paint = Paint()
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..style = PaintingStyle.fill
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..color = Colors.blue;
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// 画布起点移到屏幕中心
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canvas.translate(size.width / 2, size.height / 2);
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canvas.drawCircle(Offset(0, 0), 50, paint);
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canvas.drawLine(
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Offset(20, 20),
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Offset(50, 50),
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paint
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..color = Colors.red
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..strokeWidth = 5
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..strokeCap = StrokeCap.round
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..style = PaintingStyle.stroke);
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}
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@override
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bool shouldRepaint(CustomPainter oldDelegate) => false;
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}
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