87 lines
2.9 KiB
Dart
87 lines
2.9 KiB
Dart
import 'package:flutter/material.dart';
|
||
import 'dart:math' as math;
|
||
|
||
/// 大型音频波形动画组件
|
||
///
|
||
/// 用于显示适合主按钮的波形动画，竖线数量根据总宽度自动计算
|
||
class AudioWaveLarge extends StatelessWidget {
|
||
/// 动画控制器，用于驱动波形动画
|
||
final AnimationController animationController;
|
||
|
||
/// 波形颜色，默认为白色
|
||
final Color waveColor;
|
||
|
||
/// 波形条间距，默认为4.0px
|
||
final double barSpacing;
|
||
|
||
/// 总宽度，默认为148.0px
|
||
final double totalWidth;
|
||
|
||
/// 最大高度，默认为22.0px
|
||
final double maxHeight;
|
||
|
||
/// 最小高度，默认为4.0px
|
||
final double minHeight;
|
||
|
||
/// 构造函数
|
||
const AudioWaveLarge({
|
||
super.key,
|
||
required this.animationController,
|
||
this.waveColor = Colors.white,
|
||
this.barSpacing = 4.0,
|
||
this.totalWidth = 148.0,
|
||
this.maxHeight = 22.0,
|
||
this.minHeight = 4.0,
|
||
});
|
||
|
||
@override
|
||
Widget build(BuildContext context) {
|
||
return AnimatedBuilder(
|
||
key: const Key('audioWaveAnimation'), // 为音频波形添加key便于引用
|
||
animation: animationController,
|
||
builder: (context, child) {
|
||
// 根据总宽度动态计算竖线数量
|
||
// 每个竖线宽度2px + 间距，保持合理的密度
|
||
final barWidthWithSpacing = 2 + barSpacing;
|
||
final dynamicBarCount = (totalWidth / barWidthWithSpacing).floor();
|
||
final actualBarCount = dynamicBarCount > 0 ? dynamicBarCount : 1;
|
||
|
||
return SizedBox(
|
||
width: totalWidth, // 设置动态宽度
|
||
height: maxHeight, // 设置固定高度
|
||
child: Row(
|
||
mainAxisSize: MainAxisSize.min,
|
||
mainAxisAlignment: MainAxisAlignment.center,
|
||
crossAxisAlignment: CrossAxisAlignment.center, // 垂直居中
|
||
children: List.generate(actualBarCount, (index) {
|
||
// 为每个竖线创建不同的相位，使动画不同步
|
||
final phase = index * 0.3;
|
||
|
||
// 设置不同的频率增加自然变化
|
||
final frequency = 1.0 + (index % 3) * 0.2;
|
||
|
||
// 计算波形高度
|
||
final height = minHeight + (maxHeight - minHeight) * math.sin(
|
||
(animationController.value * 2 * math.pi * frequency) + phase
|
||
).abs();
|
||
|
||
// 构建单个波形条
|
||
return Padding(
|
||
padding: EdgeInsets.symmetric(horizontal: barSpacing / 2), // 左右间距
|
||
child: Container(
|
||
width: 2, // 波形条宽度2px
|
||
height: height, // 高度随动画变化
|
||
decoration: BoxDecoration(
|
||
color: waveColor,
|
||
borderRadius: BorderRadius.circular(2), // 圆角效果
|
||
),
|
||
),
|
||
);
|
||
}),
|
||
),
|
||
);
|
||
},
|
||
);
|
||
}
|
||
}
|