learning/tour-of-beam/frontend/lib/components/sdk_dropdown.dart

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

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

import 'builders/sdks.dart';

class SdkDropdown extends StatelessWidget {
  final Sdk value;
  final ValueChanged<Sdk> onChanged;

  const SdkDropdown({
    required this.value,
    required this.onChanged,
  });

  @override
  Widget build(BuildContext context) {
    return SdksBuilder(
      builder: (context, sdks, _) {
        if (sdks.isEmpty) {
          return Container();
        }

        return _DropdownWrapper(
          child: DropdownButton(
            value: value.id,
            onChanged: (sdkId) {
              if (sdkId != null) {
                onChanged(Sdk.parseOrCreate(sdkId));
              }
            },
            items: sdks
                .map(
                  (sdk) => DropdownMenuItem(
                    value: sdk.id,
                    child: Text(sdk.title),
                  ),
                )
                .toList(growable: false),
            alignment: Alignment.center,
            focusColor: BeamColors.transparent,
            borderRadius: BorderRadius.circular(BeamSizes.size6),
          ),
        );
      },
    );
  }
}

class _DropdownWrapper extends StatelessWidget {
  final Widget child;
  const _DropdownWrapper({required this.child});

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.only(left: BeamSizes.size10),
      decoration: BoxDecoration(
        color: Theme.of(context).selectedRowColor,
        borderRadius: BorderRadius.circular(BeamSizes.size6),
      ),
      child: DropdownButtonHideUnderline(child: child),
    );
  }
}