109 lines
3.9 KiB
Dart
109 lines
3.9 KiB
Dart
import 'package:flutter/material.dart';
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class SlideToUnlock extends StatefulWidget {
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final VoidCallback onUnlocked;
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final String text;
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final bool isLocked;
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const SlideToUnlock({
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Key? key,
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required this.onUnlocked,
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this.text = "スライドして解除",
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this.isLocked = true,
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}) : super(key: key);
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@override
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State<SlideToUnlock> createState() => _SlideToUnlockState();
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}
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class _SlideToUnlockState extends State<SlideToUnlock> {
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double _position = 0.0;
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final double _thumbSize = 50.0;
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@override
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Widget build(BuildContext context) {
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if (!widget.isLocked) return const SizedBox.shrink();
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return LayoutBuilder(
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builder: (context, constraints) {
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final double maxWidth = constraints.maxWidth;
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final double trackWidth = maxWidth - _thumbSize - 8; // 余白を考慮
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return Container(
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height: 64,
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margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
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decoration: BoxDecoration(
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color: Colors.blueGrey.shade900,
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borderRadius: BorderRadius.circular(32),
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boxShadow: [
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BoxShadow(color: Colors.black26, blurRadius: 8, offset: const Offset(0, 4)),
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],
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),
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child: Stack(
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children: [
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// 背景テキストとアニメーション効果（簡易）
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Center(
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child: Opacity(
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opacity: (1 - (_position / trackWidth)).clamp(0.2, 1.0),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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const Icon(Icons.keyboard_double_arrow_right, color: Colors.white54, size: 20),
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const SizedBox(width: 8),
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Text(
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widget.text,
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style: const TextStyle(color: Colors.white, fontWeight: FontWeight.bold, letterSpacing: 1.2),
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),
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],
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),
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),
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),
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// スライドつまみ
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Positioned(
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left: _position + 4,
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top: 4,
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child: GestureDetector(
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onHorizontalDragUpdate: (details) {
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setState(() {
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_position += details.delta.dx;
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if (_position < 0) _position = 0;
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if (_position > trackWidth) _position = trackWidth;
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});
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},
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onHorizontalDragEnd: (details) {
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if (_position >= trackWidth * 0.95) {
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widget.onUnlocked();
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// 成功時はアニメーションで戻すのではなく、状態が変わるのでリセット
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setState(() => _position = 0);
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} else {
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// 失敗時はバネのように戻る（簡易）
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setState(() => _position = 0);
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}
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},
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child: Container(
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width: maxWidth * 0.25, // 少し横長に
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height: 56,
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decoration: BoxDecoration(
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gradient: const LinearGradient(
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colors: [Colors.orangeAccent, Colors.deepOrange],
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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),
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borderRadius: BorderRadius.circular(28),
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boxShadow: [
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BoxShadow(color: Colors.black45, blurRadius: 4, offset: const Offset(2, 2)),
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],
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),
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child: const Center(
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child: Icon(Icons.key, color: Colors.white, size: 24),
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),
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),
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),
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),
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],
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),
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);
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},
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);
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}
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}
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