Initial commit

2026-02-09 20:10:42 +08:00
parent 1a1cbb1bb3
commit 1f16da8f88
172 changed files with 12461 additions and 0 deletions
@@ -0,0 +1,72 @@
+import 'package:flutter/material.dart';
+
+class TypingDots extends StatefulWidget {
+  const TypingDots({super.key, this.size = 6, this.color, this.spacing = 4});
+
+  final double size;
+  final double spacing;
+  final Color? color;
+
+  @override
+  State<TypingDots> createState() => _TypingDotsState();
+}
+
+class _TypingDotsState extends State<TypingDots>
+    with SingleTickerProviderStateMixin {
+  late final AnimationController _controller;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = AnimationController(
+      vsync: this,
+      duration: const Duration(milliseconds: 1200),
+    )..repeat();
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  double _opacity(double t, double offset) {
+    final phase = (t + offset) % 1.0;
+    final distance = (phase - 0.5).abs();
+    final ramp = 1.0 - (distance / 0.5);
+    return 0.3 + 0.7 * ramp.clamp(0.0, 1.0);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final color =
+        widget.color ?? Theme.of(context).colorScheme.onSurfaceVariant;
+    return AnimatedBuilder(
+      animation: _controller,
+      builder: (context, child) {
+        final t = _controller.value;
+        return Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            _dot(color, _opacity(t, 0.0)),
+            SizedBox(width: widget.spacing),
+            _dot(color, _opacity(t, 0.2)),
+            SizedBox(width: widget.spacing),
+            _dot(color, _opacity(t, 0.4)),
+          ],
+        );
+      },
+    );
+  }
+
+  Widget _dot(Color color, double opacity) {
+    return Opacity(
+      opacity: opacity,
+      child: Container(
+        width: widget.size,
+        height: widget.size,
+        decoration: BoxDecoration(color: color, shape: BoxShape.circle),
+      ),
+    );
+  }
+}