24

2023-12-11 21:53:27 +08:00
parent 838d6aa668
commit 25e51d789f
104 changed files with 6414 additions and 19 deletions
--- a/packages/idraw/lib/p02/s03.dart
+++ b/packages/idraw/lib/p02/s03.dart
@@ -0,0 +1,78 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'dart:ui' as ui;
+
+/// 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 Container(
+      color: Colors.white,
+      child: CustomPaint(
+        // 使用CustomPaint
+        painter: PaperPainter(),
+      ),
+    );
+  }
+}
+
+class PaperPainter extends CustomPainter {
+  @override
+  void paint(Canvas canvas, Size size) {
+    drawShaderLinear(canvas);
+  }
+
+  void drawShaderLinear(Canvas canvas) {
+    var colors = [
+      Color(0xFFF60C0C),
+      Color(0xFFF3B913),
+      Color(0xFFE7F716),
+      Color(0xFF3DF30B),
+      Color(0xFF0DF6EF),
+      Color(0xFF0829FB),
+      Color(0xFFB709F4),
+    ];
+
+    var pos = [1.0 / 7, 2.0 / 7, 3.0 / 7, 4.0 / 7, 5.0 / 7, 6.0 / 7, 1.0];
+    Paint paint = Paint();
+
+    paint
+      ..style = PaintingStyle.stroke
+      ..color = Colors.blue
+      ..strokeJoin = StrokeJoin.miter
+      ..strokeWidth = 100;
+
+    paint.shader = ui.Gradient.linear(
+        Offset(0, 0), Offset(100, 0), colors, pos, TileMode.clamp);
+    canvas.drawLine(
+      Offset(0, 100),
+      Offset(200, 100),
+      paint,
+    );
+
+    paint.shader = ui.Gradient.linear(Offset(0 + 220.0, 0),
+        Offset(100 + 220.0, 0), colors, pos, TileMode.repeated);
+    canvas.drawLine(
+      Offset(0 + 220.0, 100),
+      Offset(200 + 220.0, 100),
+      paint,
+    );
+
+    paint.shader = ui.Gradient.linear(Offset(0 + 220.0 * 2, 0),
+        Offset(100 + 220.0 * 2, 0), colors, pos, TileMode.mirror);
+    canvas.drawLine(
+      Offset(0 + 220.0 * 2, 100),
+      Offset(200 + 220.0 * 2, 100),
+      paint,
+    );
+  }
+
+  @override
+  bool shouldRepaint(CustomPainter oldDelegate) => true;
+}