AI_POC/ai_chat_assistant
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This commit is contained in:
Chen Li
2025-08-22 16:32:13 +08:00
parent 7b57322170
commit d2546d7dbb
2 changed files with 83 additions and 89 deletions
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55
lib/screens/part_screen.dart
View File

@@ -23,7 +23,8 @@ class _PartScreenState extends State<PartScreen> {
void initState() { void initState() {
super.initState(); super.initState();
WidgetsBinding.instance.addPostFrameCallback((_) { WidgetsBinding.instance.addPostFrameCallback((_) {
final messageService = Provider.of<MessageService>(context, listen: false); final messageService =
Provider.of<MessageService>(context, listen: false);
messageService.removeNonListeningMessages(); messageService.removeNonListeningMessages();
setState(() { setState(() {
_isInitialized = true; _isInitialized = true;
@@ -65,18 +66,9 @@ class _PartScreenState extends State<PartScreen> {
if (!_isInitialized) { if (!_isInitialized) {
return const SizedBox.shrink(); return const SizedBox.shrink();
} }
final double minHeight = constraints.maxHeight * 0.18; final double minHeight = constraints.maxHeight * 0.16;
final double maxHeight = constraints.maxHeight * 0.4; final double maxHeight = constraints.maxHeight * 0.4;
final double chatWidth = constraints.maxWidth * 0.94; final double chatWidth = constraints.maxWidth * 0.94;
final int messageCount =
context.watch<MessageService>().messages.length;
double chatHeight;
if (messageCount <= 1) {
chatHeight = minHeight + 70;
} else {
final height = minHeight + (messageCount * 78);
chatHeight = height < maxHeight ? height : maxHeight;
}
return Stack( return Stack(
children: [ children: [
Positioned.fill( Positioned.fill(
@@ -103,19 +95,17 @@ class _PartScreenState extends State<PartScreen> {
padding: EdgeInsets.only(bottom: constraints.maxHeight * 0.22), padding: EdgeInsets.only(bottom: constraints.maxHeight * 0.22),
child: Align( child: Align(
alignment: Alignment.bottomCenter, alignment: Alignment.bottomCenter,
child: Selector<MessageService, int>( child: Consumer<MessageService>(
selector: (_, service) => service.messages.length, builder: (context, messageService, child) {
builder: (context, messageCount, child) {
WidgetsBinding.instance.addPostFrameCallback((_) { WidgetsBinding.instance.addPostFrameCallback((_) {
_scrollToBottom(); _scrollToBottom();
}); });
return Consumer<MessageService>( return Container(
builder: (context, messageService, child) {
return AnimatedContainer(
duration: const Duration(milliseconds: 180),
curve: Curves.easeInOut,
width: chatWidth, width: chatWidth,
height: chatHeight, constraints: BoxConstraints(
minHeight: minHeight,
maxHeight: maxHeight,
),
child: ClipRRect( child: ClipRRect(
borderRadius: BorderRadius.circular(24), borderRadius: BorderRadius.circular(24),
child: BackdropFilter( child: BackdropFilter(
@@ -131,24 +121,17 @@ class _PartScreenState extends State<PartScreen> {
children: [ children: [
Padding( Padding(
padding: const EdgeInsets.only( padding: const EdgeInsets.only(
top: 42, top: 50,
left: 6, left: 6,
right: 6, right: 6,
bottom: 6), bottom: 30),
child: Column( child: LayoutBuilder(
children: [ builder: (context, boxConstraints) {
Expanded( return ChatBox(
child: Padding( scrollController: _scrollController,
padding: EdgeInsets.only(
top: 12, bottom: 12),
child: ChatBox(
scrollController:
_scrollController,
messages: messageService.messages, messages: messageService.messages,
), );
), }
),
],
), ),
), ),
Positioned( Positioned(
@@ -171,8 +154,6 @@ class _PartScreenState extends State<PartScreen> {
), ),
); );
}, },
);
},
), ),
), ),
), ),

15
lib/widgets/chat_box.dart
View File

@@ -13,11 +13,23 @@ class ChatBox extends StatelessWidget {
@override @override
Widget build(BuildContext context) { Widget build(BuildContext context) {
return ListView.builder( return Container(
constraints: const BoxConstraints(
minHeight: 60,
),
decoration: BoxDecoration(
border: Border.all(
color: Colors.grey, // 边框颜色
width: 1.0, // 边框宽度
),
borderRadius: BorderRadius.circular(8.0), // 边框圆角
),
child: ListView.builder(
controller: scrollController, controller: scrollController,
itemCount: messages.length, itemCount: messages.length,
reverse: true, reverse: true,
padding: const EdgeInsets.symmetric(horizontal: 12), padding: const EdgeInsets.symmetric(horizontal: 12),
shrinkWrap: true,
itemBuilder: (context, index) { itemBuilder: (context, index) {
final message = messages[messages.length - 1 - index]; final message = messages[messages.length - 1 - index];
final isTop = index == messages.length - 1; final isTop = index == messages.length - 1;
@@ -30,6 +42,7 @@ class ChatBox extends StatelessWidget {
child: ChatBubble(message: message), child: ChatBubble(message: message),
); );
}, },
),
); );
} }
} }