初始化

2026-09-15 15:44:13 +07:00
commit a23ba685e9
1065 changed files with 101122 additions and 0 deletions
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+import 'package:flutter/material.dart';
+import 'package:hgdj/assets_tool/images.dart';
+
+/// 双击点赞爱心动效的触发器。onDoubleTapDown 里 [markAt] 记落点，onDoubleTap 里 [burst] 放动画
+class LikeBurstController extends ChangeNotifier {
+  Offset? at;
+
+  /// 记下双击落点(相对 Stack 左上角)
+  void markAt(Offset offset) => at = offset;
+
+  /// 在落点弹一颗爱心；没记过落点就不弹
+  void burst() {
+    if (at == null) return;
+    notifyListeners();
+  }
+}
+
+/// 双击处弹出的爱心：弹起放大 → 停顿 → 淡出。必须直接挂在 Stack 里
+class LikeBurstView extends StatefulWidget {
+  const LikeBurstView({
+    super.key,
+    required this.controller,
+    this.icon = 'like_red.png',
+    this.size = 90,
+  });
+
+  final LikeBurstController controller;
+  final String icon; // assets/images/common 下的图名
+  final double size;
+
+  @override
+  State<LikeBurstView> createState() => _LikeBurstViewState();
+}
+
+class _LikeBurstViewState extends State<LikeBurstView>
+    with SingleTickerProviderStateMixin {
+  late final AnimationController _ctr;
+  Offset? _at;
+
+  @override
+  void initState() {
+    super.initState();
+    _ctr = AnimationController(
+        vsync: this, duration: const Duration(milliseconds: 600))
+      ..addStatusListener((status) {
+        if (status == AnimationStatus.completed && mounted)
+          setState(() => _at = null);
+      });
+    widget.controller.addListener(_onBurst);
+  }
+
+  @override
+  void didUpdateWidget(covariant LikeBurstView oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.controller != widget.controller) {
+      oldWidget.controller.removeListener(_onBurst);
+      widget.controller.addListener(_onBurst);
+    }
+  }
+
+  @override
+  void dispose() {
+    widget.controller.removeListener(_onBurst);
+    _ctr.dispose();
+    super.dispose();
+  }
+
+  void _onBurst() {
+    setState(() => _at = widget.controller.at);
+    _ctr.forward(from: 0); // 连点就从头重放
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final at = _at;
+    if (at == null) return const SizedBox.shrink();
+    return Positioned(
+      left: at.dx - widget.size / 2,
+      top: at.dy - widget.size / 2,
+      child: IgnorePointer(
+        child: FadeTransition(
+          opacity: TweenSequence<double>([
+            TweenSequenceItem(tween: Tween(begin: 0.0, end: 1.0), weight: 20),
+            TweenSequenceItem(tween: ConstantTween(1.0), weight: 40),
+            TweenSequenceItem(tween: Tween(begin: 1.0, end: 0.0), weight: 40),
+          ]).animate(_ctr),
+          child: ScaleTransition(
+            scale: Tween(begin: 0.5, end: 1.3).animate(
+                CurvedAnimation(parent: _ctr, curve: Curves.easeOutBack)),
+            child: Image.asset(widget.icon.commonImgPath,
+                width: widget.size, height: widget.size),
+          ),
+        ),
+      ),
+    );
+  }
+}