143 lines
4.4 KiB
Dart
143 lines
4.4 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:stream_chat_flutter/src/stream_icons.dart';
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typedef ChipBuilder<T> = Widget Function(BuildContext context, T chip);
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typedef OnChipAdded<T> = void Function(T chip);
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typedef OnChipRemoved<T> = void Function(T chip);
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class ChipsInputTextField<T> extends StatefulWidget {
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final TextEditingController controller;
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final FocusNode focusNode;
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final ValueChanged<String> onInputChanged;
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final ChipBuilder<T> chipBuilder;
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final OnChipAdded<T> onChipAdded;
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final OnChipRemoved<T> onChipRemoved;
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final String hint;
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const ChipsInputTextField({
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Key key,
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@required this.chipBuilder,
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@required this.controller,
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this.onInputChanged,
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this.focusNode,
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this.onChipAdded,
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this.onChipRemoved,
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this.hint = 'Type a name or group',
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}) : super(key: key);
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@override
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ChipInputTextFieldState<T> createState() => ChipInputTextFieldState<T>();
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}
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class ChipInputTextFieldState<T> extends State<ChipsInputTextField<T>> {
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final _chips = <T>{};
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bool _pauseItemAddition = false;
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void addItem(T item) {
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if (!_pauseItemAddition) {
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setState(() => _chips.add(item));
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if (widget.onChipAdded != null) widget.onChipAdded(item);
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}
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}
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void removeItem(T item) {
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setState(() {
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_chips.remove(item);
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if (_chips.isEmpty) resumeItemAddition();
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});
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if (widget.focusNode != null) widget.focusNode.requestFocus();
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if (widget.onChipRemoved != null) widget.onChipRemoved(item);
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}
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void pauseItemAddition() {
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if (!_pauseItemAddition) {
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setState(() => _pauseItemAddition = true);
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}
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}
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void resumeItemAddition() {
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if (_pauseItemAddition) {
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setState(() => _pauseItemAddition = false);
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}
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}
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@override
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Widget build(BuildContext context) {
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return Material(
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elevation: 4,
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color: Colors.white,
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child: Container(
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child: Padding(
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padding: const EdgeInsets.symmetric(
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vertical: 16.0,
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horizontal: 16.0,
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),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Padding(
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padding: const EdgeInsets.symmetric(vertical: 10.0),
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child: Text(
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'TO:',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.w500,
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),
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),
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),
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SizedBox(width: 12),
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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mainAxisSize: MainAxisSize.min,
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children: [
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Wrap(
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spacing: 4.0,
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runSpacing: 4.0,
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children: _chips.map((item) {
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return widget.chipBuilder(context, item);
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}).toList(),
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),
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if (!_pauseItemAddition) ...[
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if (_chips.isNotEmpty) SizedBox(height: 4),
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TextField(
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controller: widget.controller,
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onChanged: widget.onInputChanged,
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focusNode: widget.focusNode,
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style: TextStyle(fontSize: 18),
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decoration: InputDecoration(
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isDense: true,
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border: InputBorder.none,
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focusedBorder: InputBorder.none,
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enabledBorder: InputBorder.none,
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errorBorder: InputBorder.none,
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disabledBorder: InputBorder.none,
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contentPadding: const EdgeInsets.symmetric(
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vertical: 8,
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),
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hintText: widget.hint,
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hintStyle: TextStyle(fontSize: 18)),
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),
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]
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],
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),
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),
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SizedBox(width: 12),
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IconButton(
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icon: Icon(
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_chips.isEmpty ? StreamIcons.user : StreamIcons.user_add,
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),
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onPressed: () {
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resumeItemAddition();
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},
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visualDensity: VisualDensity.compact,
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padding: const EdgeInsets.all(0),
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),
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],
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),
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),
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),
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);
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}
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}
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