v0.2.9

lib/widgets/reviewed_stamp_icon.dart

@@ -0,0 +1,64 @@
+import 'package:flutter/material.dart';
+
+/// 已阅印章图标 — 双圈外圆 + 内框 + "已阅"文字
+class ReviewedStampIcon extends StatelessWidget {
+  final double size;
+  final Color color;
+
+  const ReviewedStampIcon({super.key, this.size = 20, required this.color});
+
+  @override
+  Widget build(BuildContext context) {
+    return CustomPaint(
+      size: Size(size, size),
+      painter: _ReviewedStampPainter(color: color),
+    );
+  }
+}
+
+class _ReviewedStampPainter extends CustomPainter {
+  final Color color;
+  _ReviewedStampPainter({required this.color});
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    final cx = size.width / 2;
+    final cy = size.height / 2;
+    final r = size.width / 2 - 1;
+
+    // 外圈
+    final outerPaint = Paint()
+      ..color = color
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = size.width * 0.06;
+    canvas.drawCircle(Offset(cx, cy), r, outerPaint);
+
+    // 内圈
+    final innerPaint = Paint()
+      ..color = color.withValues(alpha: 0.5)
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = size.width * 0.03;
+    canvas.drawCircle(Offset(cx, cy), r * 0.82, innerPaint);
+
+    // "已阅" 文字
+    final fontSize = size.width * 0.32;
+    final textPainter = TextPainter(
+      text: TextSpan(
+        text: '已阅',
+        style: TextStyle(
+          color: color,
+          fontSize: fontSize,
+          fontWeight: FontWeight.w900,
+          height: 1.1,
+          letterSpacing: fontSize * 0.1,
+        ),
+      ),
+      textDirection: TextDirection.ltr,
+    );
+    textPainter.layout();
+    textPainter.paint(canvas, Offset(cx - textPainter.width / 2, cy - textPainter.height / 2));
+  }
+
+  @override
+  bool shouldRepaint(covariant _ReviewedStampPainter old) => old.color != color;
+}