hash-wallet/lib/new-ui/widgets/send_page/send_amount_input.dart

import 'package:cake_wallet/new-ui/widgets/send_page/floating_icon_button.dart';
import 'package:cake_wallet/src/widgets/cake_image_widget.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_mobx/flutter_mobx.dart';

class NewSendAmountInput extends StatefulWidget {
  const NewSendAmountInput(
      {super.key,
      required this.currency,
      required this.hasPicker,
      required this.onPickerClicked,
      required this.currencyIconPath,
      required this.amountController,
      this.validator});

  final String currency;
  final String currencyIconPath;
  final bool hasPicker;
  final VoidCallback onPickerClicked;
  final TextEditingController amountController;
  final FormFieldValidator<String>? validator;

  @override
  State<NewSendAmountInput> createState() => _NewSendAmountInputState();
}

class _NewSendAmountInputState extends State<NewSendAmountInput> {
  final formFieldKey = GlobalKey<FormFieldState<String>>();

  @override
  void initState() {
    widget.amountController.addListener(()=>formFieldKey.currentState?.didChange(widget.amountController.text));
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return FormField<String>(
      key: formFieldKey,
      initialValue: widget.amountController.text,
      validator: widget.validator,
      builder: (state) => Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Container(
              decoration: BoxDecoration(
                  color: widget.hasPicker
                      ? Theme.of(context).colorScheme.surfaceContainerHigh
                      : Theme.of(context).colorScheme.surfaceContainer,
                  borderRadius: BorderRadius.circular(18)),
              child: Row(
                children: [
                  Expanded(
                    child: Container(
                      decoration: BoxDecoration(
                          color: Theme.of(context).colorScheme.surfaceContainer,
                          borderRadius: BorderRadius.horizontal(left: Radius.circular(18))),
                      child: Row(
                        mainAxisSize: MainAxisSize.max,
                        spacing: 8,
                        children: [
                          Expanded(
                            child: TextField(
                              keyboardType:
                                  TextInputType.numberWithOptions(signed: false, decimal: true),
                              inputFormatters: <TextInputFormatter>[
                                FilteringTextInputFormatter.allow(RegExp(r'^\d*[.,]?\d*$'))
                              ],
                              onChanged: state.didChange,
                              controller: widget.amountController,
                              decoration: InputDecoration(hintText: "0", errorMaxLines: 3),
                            ),
                          ),
                          FloatingIconButton(
                              iconPath: "assets/new-ui/paste.svg",
                              onPressed: () async {
                                final data = await Clipboard.getData(Clipboard.kTextPlain);
                                if (data != null && data.text != null) {
                                  widget.amountController.text = data.text!;
                                }
                              }),
                          SizedBox.shrink()
                        ],
                      ),
                    ),
                  ),
                  IntrinsicWidth(
                    child: Observer(
                      builder: (_) {
                        return GestureDetector(
                          onTap: widget.onPickerClicked,
                          child: Container(
                              alignment: Alignment.center,
                              width: double.infinity,
                              decoration: BoxDecoration(
                                borderRadius: BorderRadius.only(
                                    topRight: Radius.circular(18),
                                    bottomRight: Radius.circular(18)),
                                color: widget.hasPicker
                                    ? Theme.of(context).colorScheme.surfaceContainerHigh
                                    : Theme.of(context).colorScheme.surfaceContainer,
                              ),
                              child: Padding(
                                  padding: EdgeInsets.symmetric(horizontal: 12),
                                  child: Row(
                                    mainAxisAlignment: MainAxisAlignment.center,
                                    mainAxisSize: MainAxisSize.max,
                                    spacing: 8,
                                    children: [
                                      if (widget.hasPicker && widget.currencyIconPath.isNotEmpty)
                                        Image.asset(widget.currencyIconPath, width: 24, height: 24),
                                      Text(widget.currency),
                                      if (widget.hasPicker)
                                        CakeImageWidget(imageUrl:
                                          "assets/new-ui/chooser.svg",
                                          width: 12,
                                          height: 12,
                                          colorFilter: ColorFilter.mode(
                                              Theme.of(context).colorScheme.primary,
                                              BlendMode.srcIn),
                                        )
                                    ],
                                  ))),
                        );
                      },
                    ),
                  ),
                ],
              )),
          if (state.hasError)
            Padding(
              padding: EdgeInsets.only(top: 6, left: 8),
              child: Text(
                state.errorText!,
                style: TextStyle(fontSize: 12, color: Theme.of(context).colorScheme.error),
              ),
            )
        ],
      ),
    );
  }
}