import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

class ASGradientButton extends StatefulWidget {
  ///按钮文字
  ///动态类型，可以是string或者widget
  final dynamic title;

  ///按钮文字颜色
  ///若已定义文字风格则此属性不生效
  final Color textColor;

  ///圆角
  final double radius;

  ///按钮文字风格
  final TextStyle textStyle;

  ///内边距
  final Padding padding;

  ///点击事件
  final VoidCallback onPressed;

  ///渐变颜色
  final List<Color> colors;

  ///开始位置
  final AlignmentGeometry begin;

  ///结束位置
  final AlignmentGeometry end;

  ///宽度
  final double width;
  ASGradientButton(
      {Key key,
      this.title,
      this.textColor,
      this.radius,
      this.textStyle,
      this.padding,
      this.onPressed,
      this.colors,
      this.width,
      this.begin,
      this.end})
      : super(key: key);
  ASGradientButton.pay({
    Key key,
    this.title,
    this.textStyle,
    this.padding,
    this.onPressed,
  })  : textColor = Color(0xD9FFFFFF),
        radius = 19.w,
        colors = [Color(0xFFF89B14), Color(0xFFF86B140)],
        width = 100.w,
        begin = Alignment.centerLeft,
        end = Alignment.centerRight,
        super(key: key);

  @override
  _ASGradientButtonState createState() => _ASGradientButtonState();
}

class _ASGradientButtonState extends State<ASGradientButton> {
  @override
  Widget build(BuildContext context) {
    return Container(
      width: widget.width ?? 100.w,
      decoration: BoxDecoration(
        gradient: LinearGradient(
          begin: widget.begin ?? Alignment.centerLeft,
          end: widget.end ?? Alignment.centerRight,
          colors: widget.colors ?? [Color(0xFFF89B14), Color(0xFFF86B140)],
        ),
        borderRadius: BorderRadius.circular(widget.radius ?? 19.w),
      ),
      child: MaterialButton(
        minWidth: widget.width ?? 100.w,
        materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
        onPressed: widget.onPressed,
        child: widget.title is String
            ? Text(widget.title,
                style: widget.textStyle ??
                    TextStyle(
                        color: widget.textColor ?? Color(0xD9FFFFFF),
                        fontSize: 18.sp))
            : widget.title,
        padding: widget.padding ?? EdgeInsets.symmetric(vertical: 8.w),
        elevation: 0,
      ),
    );
  }
}