37 lines
877 B
Dart
37 lines
877 B
Dart
import 'package:flutter/cupertino.dart';
|
|
import 'package:flutter/material.dart';
|
|
import 'package:flutter/services.dart';
|
|
|
|
/// create by 张风捷特烈 on 2020-03-19
|
|
/// contact me by email 1981462002@qq.com
|
|
/// 说明: 纸
|
|
|
|
class Paper extends StatelessWidget{
|
|
const Paper({super.key});
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return CustomPaint(
|
|
painter: PaperPainter(),
|
|
);
|
|
}
|
|
}
|
|
|
|
class PaperPainter extends CustomPainter {
|
|
|
|
@override
|
|
void paint(Canvas canvas, Size size) {
|
|
drawInvertColors(canvas);
|
|
}
|
|
void drawInvertColors(Canvas canvas) {
|
|
var paint = Paint();
|
|
paint..color = Color(0xff009A44);
|
|
canvas.drawCircle(Offset(100, 100), 50, paint..invertColors = false);
|
|
canvas.drawCircle(Offset(100+120.0, 100), 50, paint..invertColors = true);
|
|
}
|
|
|
|
|
|
@override
|
|
bool shouldRepaint(CustomPainter oldDelegate) => true;
|
|
}
|