QinGang_interested/lib/customWidget/custom_button.dart

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import 'package:flutter/material.dart';
/// 按钮样式类型
enum ButtonStyleType {
primary, // 主样式:纯色背景,无边框
secondary, // 次样式:白色背景,深灰文字,深灰边框
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del, // 红色背景,白文字
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}
/// 自定义默认按钮(支持不可点击/禁用状态和防连点功能)
class CustomButton extends StatefulWidget {
final String text; // 按钮文字
final Color backgroundColor; // 按钮背景色
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final Color delColor; // 按钮背景色
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final double borderRadius; // 圆角半径默认5
final VoidCallback? onPressed; // 点击事件回调
final EdgeInsetsGeometry? padding; // 内边距
final EdgeInsetsGeometry? margin; // 外边距
final double? height; // 按钮高度
final TextStyle? textStyle; // 文字样式
/// 新增是否可点击true 可点false 禁用)
/// 注意:如果 onPressed 为 null也会被视为不可点击
final bool enabled;
/// 新增:禁用时的背景色(可选)
final Color? disabledBackgroundColor;
/// 新增:禁用时的文字颜色(可选)
final Color? disabledTextColor;
/// 新增:防连点间隔时间(毫秒)
final int debounceInterval;
/// 新增:按钮样式类型
final ButtonStyleType buttonStyle;
/// 新增:边框颜色(仅在 secondary 样式下使用,如不指定则使用默认深灰色)
final Color? borderColor;
/// 新增:边框宽度(仅在 secondary 样式下使用)
final double borderWidth;
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/// 新增未读数默认0大于0时在右上角显示未读气泡
final int noRead;
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const CustomButton({
super.key,
required this.text,
this.backgroundColor = Colors.blue,
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this.delColor = Colors.red,
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this.borderRadius = 5.0,
this.onPressed,
this.padding,
this.margin,
this.height,
this.textStyle,
this.enabled = true,
this.disabledBackgroundColor,
this.disabledTextColor,
this.debounceInterval = 1000, // 默认1秒防连点
this.buttonStyle = ButtonStyleType.primary, // 默认为主样式
this.borderColor,
this.borderWidth = 1.0,
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this.noRead = 0, // 新增参数默认0
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});
@override
State<CustomButton> createState() => _CustomButtonState();
}
class _CustomButtonState extends State<CustomButton> {
// 记录最后一次点击时间
DateTime _lastClickTime = DateTime(0);
@override
Widget build(BuildContext context) {
// 如果 enabled 为 false 或 onPressed 为 null则视为不可点击
final bool isEnabled = widget.enabled && widget.onPressed != null;
// 根据按钮样式计算背景色、文字颜色和边框
final Color bgColor;
final Color textColor;
final Color? borderColor;
if (widget.buttonStyle == ButtonStyleType.secondary) {
// 次样式:白色背景,深灰文字,深灰边框
bgColor = isEnabled
? Colors.white
: (widget.disabledBackgroundColor ?? Colors.grey.shade200);
textColor = isEnabled
? Colors.grey[800]!
: (widget.disabledTextColor ?? Colors.grey.shade500);
borderColor = isEnabled
? (widget.borderColor ?? Colors.grey.shade400)
: (widget.disabledTextColor ?? Colors.grey.shade300);
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} else if (widget.buttonStyle == ButtonStyleType.primary) {
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// 主样式:原有逻辑
bgColor = isEnabled
? widget.backgroundColor
: (widget.disabledBackgroundColor ?? Colors.grey.shade400);
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textColor = isEnabled ? Colors.white : (widget.disabledTextColor ?? Colors.white70);
borderColor = null; // 主样式默认无边框
}else{
bgColor = isEnabled
? widget.delColor
: (widget.disabledBackgroundColor ?? Colors.grey.shade400);
textColor = isEnabled ? Colors.white : (widget.disabledTextColor ?? Colors.white70);
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borderColor = null; // 主样式默认无边框
}
// 计算最终文字样式
TextStyle finalTextStyle;
if (widget.textStyle != null) {
finalTextStyle = widget.textStyle!.copyWith(color: textColor);
} else {
finalTextStyle = TextStyle(
color: textColor,
fontSize: 14,
fontWeight: FontWeight.bold,
);
}
// 处理点击事件(添加防连点逻辑)
void handleOnPressed() {
final now = DateTime.now();
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if (now.difference(_lastClickTime).inMilliseconds < widget.debounceInterval) {
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// 在防连点间隔内,不执行操作
return;
}
_lastClickTime = now;
if (widget.onPressed != null) {
widget.onPressed!();
}
}
// 构建边框
final BoxBorder? border = borderColor != null
? Border.all(
color: borderColor,
width: widget.borderWidth,
)
: null;
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// 是否显示未读气泡
final bool showBadge = widget.noRead > 0;
// 气泡显示文本:超过 99 显示 "99+"
final String badgeText = widget.noRead > 99 ? '99+' : widget.noRead.toString();
// 根据文字长度调整气泡尺寸(保持圆形)
double badgeSize = 18;
if (widget.noRead > 99) {
badgeSize = 28;
} else if (widget.noRead > 9) {
badgeSize = 22;
} else {
badgeSize = 18;
}
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// 点击拦截器 + 视觉反馈(禁用时降低不透明度)
return Opacity(
opacity: isEnabled ? 1.0 : 0.65,
child: AbsorbPointer(
absorbing: !isEnabled,
child: GestureDetector(
onTap: isEnabled ? handleOnPressed : null,
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child: Stack(
clipBehavior: Clip.none,
children: [
// 按钮主体
Container(
height: widget.height ?? 45, // 默认高度45
padding: widget.padding ?? const EdgeInsets.all(6), // 默认内边距
margin: widget.margin ?? const EdgeInsets.symmetric(horizontal: 5), // 默认外边距
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(widget.borderRadius),
color: bgColor,
border: border,
),
child: Center(
child: Text(
widget.text,
style: finalTextStyle,
),
),
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),
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// 未读气泡(右上角),只在 noRead > 0 时显示
if (showBadge)
Positioned(
// 让气泡靠近右上角并稍微偏移到外面一点,看起来像贴在角上
top: -6,
right: -3,
child: Container(
width: badgeSize,
height: badgeSize,
alignment: Alignment.center,
decoration: BoxDecoration(
color: Colors.red,
shape: BoxShape.circle,
boxShadow: [
BoxShadow(
color: Colors.black26,
blurRadius: 2,
offset: Offset(0, 1),
),
],
),
// 使用 FittedBox 保证文本不会溢出
child: FittedBox(
fit: BoxFit.scaleDown,
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 2),
child: Text(
badgeText,
textAlign: TextAlign.center,
style: const TextStyle(
color: Colors.white,
fontSize: 11,
fontWeight: FontWeight.bold,
),
),
),
),
),
),
],
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),
),
),
);
}
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}