ente/lib/ui/common/gradient_button.dart

// @dart=2.9

import 'package:flutter/material.dart';

class GradientButton extends StatelessWidget {
  final List<Color> linearGradientColors;
  final Function onTap;
  final Widget child;
  // text is ignored if child is specified
  final String text;
  // nullable
  final IconData iconData;
  // padding between the text and icon
  final double paddingValue;

  const GradientButton({
    Key key,
    this.child,
    this.linearGradientColors = const [
      Color(0xFF2CD267),
      Color(0xFF1DB954),
    ],
    this.onTap,
    this.text = '',
    this.iconData,
    this.paddingValue = 0.0,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    Widget buttonContent;
    if (child != null) {
      buttonContent = child;
    } else if (iconData == null) {
      buttonContent = Text(
        text,
        style: const TextStyle(
          color: Colors.white,
          fontWeight: FontWeight.w600,
          fontFamily: 'Inter-SemiBold',
          fontSize: 18,
        ),
      );
    } else {
      buttonContent = Row(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          Icon(
            iconData,
            color: Colors.white,
          ),
          Padding(padding: EdgeInsets.all(paddingValue)),
          Text(
            text,
            style: const TextStyle(
              color: Colors.white,
              fontWeight: FontWeight.w600,
              fontFamily: 'Inter-SemiBold',
              fontSize: 18,
            ),
          ),
        ],
      );
    }
    return InkWell(
      onTap: onTap,
      child: Container(
        height: 56,
        decoration: BoxDecoration(
          gradient: LinearGradient(
            begin: const Alignment(0.1, -0.9),
            end: const Alignment(-0.6, 0.9),
            colors: linearGradientColors,
          ),
          borderRadius: BorderRadius.circular(8),
        ),
        child: Center(child: buttonContent),
      ),
    );
  }
}