58 lines
1.5 KiB
Dart
58 lines
1.5 KiB
Dart
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import 'package:flutter/material.dart';
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typedef OnRegionChanged = void Function(String region);
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class ReginDropDownButton extends StatefulWidget {
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OnRegionChanged onRegionChanged;
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String currentHint = "cn-shanghai";
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ReginDropDownButton({Key key, this.onRegionChanged, this.currentHint})
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: super(key: key);
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@override
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_ReginDropDownButtonState createState() => _ReginDropDownButtonState();
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}
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class _ReginDropDownButtonState extends State<ReginDropDownButton> {
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List<DropdownMenuItem> getItemList() {
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List<DropdownMenuItem> items = List();
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DropdownMenuItem item1 = DropdownMenuItem(
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child: Text("cn-shanghai"),
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value: "cn-shanghai",
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);
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DropdownMenuItem item2 = DropdownMenuItem(
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child: Text("ap-southeast-1"),
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value: "ap-southeast-1",
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);
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DropdownMenuItem item3 = DropdownMenuItem(
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child: Text("ap-northeast-1"),
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value: "ap-northeast-1",
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);
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DropdownMenuItem item4 = DropdownMenuItem(
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child: Text("cn-beijing"),
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value: "cn-beijing",
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);
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items.add(item1);
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items.add(item2);
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items.add(item3);
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items.add(item4);
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return items;
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}
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@override
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Widget build(BuildContext context) {
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return DropdownButton(
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items: getItemList(),
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isExpanded: true,
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hint: Text(widget.currentHint),
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onChanged: (value) {
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setState(() {
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widget.currentHint = value;
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if (widget.onRegionChanged != null) {
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widget.onRegionChanged(value);
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}
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});
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});
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}
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}
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