138 lines
3.9 KiB
Dart
138 lines
3.9 KiB
Dart
import 'dart:ui';
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import 'package:flutter/material.dart';
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import 'package:stream_chat/stream_chat.dart';
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import 'stream_channel.dart';
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class MessageInput extends StatefulWidget {
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MessageInput({
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Key key,
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this.onMessageSent,
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this.parent,
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}) : super(key: key);
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final void Function(Message) onMessageSent;
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final Message parent;
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@override
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_MessageInputState createState() => _MessageInputState();
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}
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class _MessageInputState extends State<MessageInput> {
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final _textController = TextEditingController();
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bool _messageIsPresent = false;
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bool _typingStarted = false;
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@override
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Widget build(BuildContext context) {
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return Padding(
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padding: const EdgeInsets.all(8.0),
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child: Container(
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width: MediaQuery.of(context).size.width,
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padding: EdgeInsets.all(2),
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(10.0),
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gradient: _typingStarted
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? LinearGradient(colors: [Color(0xFF00AEFF), Color(0xFF0076FF)])
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: null,
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),
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child: Container(
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decoration: BoxDecoration(
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color: Theme.of(context).canvasColor,
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borderRadius: BorderRadius.circular(10.0),
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),
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child: Container(
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decoration: BoxDecoration(
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color: Colors.black.withAlpha(5),
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borderRadius: BorderRadius.circular(10.0),
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border: Border.all(color: Colors.black.withOpacity(.2)),
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),
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child: Flex(
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direction: Axis.horizontal,
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children: <Widget>[
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Expanded(
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child: TextField(
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minLines: null,
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maxLines: null,
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onSubmitted: (_) {
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_sendMessage(context);
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},
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controller: _textController,
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onChanged: (s) {
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StreamChannel.of(context).channelClient.keyStroke();
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setState(() {
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_messageIsPresent = s.trim().isNotEmpty;
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});
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},
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onTap: () {
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setState(() {
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_typingStarted = true;
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});
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},
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style: Theme.of(context).textTheme.body1,
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autofocus: false,
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decoration: InputDecoration(
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hintText: 'Write a message',
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prefixText: ' ',
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border: InputBorder.none,
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),
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),
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),
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AnimatedCrossFade(
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crossFadeState: _messageIsPresent
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? CrossFadeState.showFirst
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: CrossFadeState.showSecond,
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firstChild: _buildSendButton(context),
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secondChild: Container(),
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duration: Duration(milliseconds: 300),
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alignment: Alignment.center,
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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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IconButton _buildSendButton(BuildContext context) {
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return IconButton(
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onPressed: () {
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_sendMessage(context);
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},
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icon: Icon(
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Icons.send,
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),
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);
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}
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void _sendMessage(BuildContext context) {
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final text = _textController.text.trim();
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if (text.isEmpty) {
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return;
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}
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_textController.clear();
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setState(() {
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_messageIsPresent = false;
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_typingStarted = false;
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});
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FocusScope.of(context).unfocus();
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StreamChannel.of(context)
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.channelClient
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.sendMessage(
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Message(
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parentId: widget.parent?.id,
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text: text,
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),
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)
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.then((_) {
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if (widget.onMessageSent != null) {
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widget.onMessageSent(Message(text: text));
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}
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});
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}
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}
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