mobile-app/lib/presentation/custom_widgets/dropdown_supply_widget.dart

import 'package:farm_tpf/utils/validators.dart';
import 'package:flutter/material.dart';

class DropdownSupplyWidget extends StatelessWidget {
  final String condition;
  final String hint;
  final String value;
  final Function onPressed;
  final String invalidMessage;
  DropdownSupplyWidget(
      {@required this.hint,
      this.value,
      @required this.condition,
      @required this.onPressed,
      this.invalidMessage});
  @override
  Widget build(BuildContext context) {
    return SizedBox(
      width: double.infinity,
      height: Validators.stringNotNullOrEmpty(invalidMessage) ? 85 : 65,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            hint ?? '',
            style: TextStyle(
                color: Validators.stringNotNullOrEmpty(invalidMessage)
                    ? Colors.red
                    : Colors.black54,
                fontSize: 13.0),
          ),
          SizedBox(
            width: double.infinity,
            height: 44,
            child: FlatButton(
                padding: EdgeInsets.only(
                    top: 0.0, right: 0.0, bottom: 0.0, left: 0.0),
                onPressed: onPressed,
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Container(
                        padding: EdgeInsets.only(
                            top: 0.0, right: 0.0, bottom: 10.5, left: 0.0),
                        decoration: BoxDecoration(
                          border: Border(
                              bottom: BorderSide(
                                  width: 0.5,
                                  color: Validators.stringNotNullOrEmpty(
                                          invalidMessage)
                                      ? Colors.red
                                      : Colors.black54)),
                        ),
                        child: Row(
                          children: [
                            Expanded(
                                child: Text(value ?? hint,
                                    style: TextStyle(
                                        fontSize: 16.0,
                                        color: Colors.black45))),
                            Icon(
                              Icons.arrow_drop_down,
                              color: Colors.grey,
                            ),
                          ],
                        ))
                  ],
                )),
          ),
          Validators.stringNotNullOrEmpty(invalidMessage)
              ? Text(
                  invalidMessage ?? '',
                  style: TextStyle(
                      fontSize: 12.0,
                      color: Colors.red,
                      fontWeight: FontWeight.normal),
                  textAlign: TextAlign.left,
                )
              : SizedBox(),
        ],
      ),
    );
  }
}