From 250af5cd335c53b09c938b2b2ae66f9c22f7dad4 Mon Sep 17 00:00:00 2001
From: azharhayat271 <azharhayat271@gmail.com>
Date: Wed, 8 May 2024 23:52:39 +0500
Subject: [PATCH] chat ui improved

---
 lib/ui/chatbot_screen.dart | 116 ++++++++++++++++++++++++++++++-------
 1 file changed, 94 insertions(+), 22 deletions(-)

diff --git a/lib/ui/chatbot_screen.dart b/lib/ui/chatbot_screen.dart
index 0794a9c..b016b81 100644
--- a/lib/ui/chatbot_screen.dart
+++ b/lib/ui/chatbot_screen.dart
@@ -3,13 +3,15 @@ import 'package:http/http.dart' as http;
 import 'dart:convert';
 
 class ChatScreen extends StatefulWidget {
+  const ChatScreen({super.key});
+
   @override
   _ChatScreenState createState() => _ChatScreenState();
 }
 
 class _ChatScreenState extends State<ChatScreen> {
   final TextEditingController _textController = TextEditingController();
-  List<String> _messages = [];
+  final List<String> _messages = [];
 
   void _handleSubmitted(String text) async {
     _textController.clear();
@@ -45,18 +47,18 @@ class _ChatScreenState extends State<ChatScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text("Chat Screen"),
+        title: const Text("Chatbot"),
       ),
       body: Column(
         children: <Widget>[
           Expanded(
             child: ListView.builder(
-              padding: EdgeInsets.all(8.0),
+              padding: const EdgeInsets.all(8.0),
               itemCount: _messages.length,
               itemBuilder: (_, int index) => _buildMessage(_messages[index]),
             ),
           ),
-          Divider(height: 1.0),
+          Divider(height: 1.0, color: Colors.grey[300]),
           Container(
             decoration: BoxDecoration(color: Theme.of(context).cardColor),
             child: _buildTextComposer(),
@@ -69,23 +71,83 @@ class _ChatScreenState extends State<ChatScreen> {
   Widget _buildMessage(String message) {
     final isUserMessage = _messages.indexOf(message) % 2 == 0;
 
-    return ListTile(
-      leading:
-          isUserMessage ? Icon(Icons.person) : Icon(Icons.chat_bubble_outline),
-      title: Container(
-        decoration: BoxDecoration(
-          borderRadius: BorderRadius.circular(8.0),
-          color: isUserMessage ? Colors.blue[100] : Colors.green[100],
-        ),
-        padding: EdgeInsets.all(8.0),
-        child: Text(
-          message,
-          style: TextStyle(
-            color: isUserMessage ? Colors.blue[900] : Colors.green[900],
+    return Row(
+      mainAxisAlignment: MainAxisAlignment.start,
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        if (!isUserMessage) _buildBotAvatar(),
+        const SizedBox(width: 8.0),
+        Expanded(
+          child: Column(
+            crossAxisAlignment: isUserMessage
+                ? CrossAxisAlignment.end
+                : CrossAxisAlignment.start,
+            children: [
+              if (!isUserMessage) _buildBotLabel(),
+              if (isUserMessage) _buildUserAvatar(),
+              Container(
+                padding: const EdgeInsets.all(10.0),
+                margin: EdgeInsets.only(
+                    top: 5.0,
+                    right: isUserMessage ? 0.0 : 60.0,
+                    left: isUserMessage ? 60.0 : 0.0),
+                decoration: BoxDecoration(
+                  color: isUserMessage ? Colors.blue[100] : Colors.grey[200],
+                  borderRadius: BorderRadius.circular(20.0),
+                  boxShadow: [
+                    BoxShadow(
+                        color: Colors.grey.withOpacity(0.2), blurRadius: 3.0),
+                  ],
+                ),
+                child: Text(
+                  message,
+                  style: const TextStyle(fontSize: 14.0),
+                ),
+              ),
+            ],
           ),
         ),
+      ],
+    );
+  }
+
+  Widget _buildUserAvatar() {
+    return CircleAvatar(
+      radius: 15.0,
+      backgroundColor: Colors.blue[100],
+      child: const Icon(
+        Icons.person,
+        color: Colors.white,
+      ),
+    );
+  }
+
+  Widget _buildBotAvatar() {
+    return CircleAvatar(
+      radius: 15.0,
+      backgroundColor: Colors.green[100],
+      child: const Icon(Icons.android, color: Colors.white, size: 20.0),
+    );
+  }
+
+  Widget _buildBotLabel() {
+    return Container(
+      padding: const EdgeInsets.all(4.0),
+      decoration: BoxDecoration(
+        color: Colors.green[50],
+        borderRadius: BorderRadius.circular(10.0),
+      ),
+      child: const Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(Icons.android, size: 14.0, color: Colors.green),
+          SizedBox(width: 3.0),
+          Text(
+            "UET-Bot",
+            style: TextStyle(fontSize: 12.0),
+          ),
+        ],
       ),
-      trailing: isUserMessage ? null : Icon(Icons.person),
     );
   }
 
@@ -93,19 +155,29 @@ class _ChatScreenState extends State<ChatScreen> {
     return IconTheme(
       data: IconThemeData(color: Theme.of(context).colorScheme.secondary),
       child: Container(
-        margin: EdgeInsets.symmetric(horizontal: 8.0),
+        margin: const EdgeInsets.symmetric(horizontal: 8.0),
+        padding: const EdgeInsets.symmetric(horizontal: 12.0, vertical: 4.0),
+        decoration: BoxDecoration(
+          color: Colors.white,
+          borderRadius: BorderRadius.circular(25.0),
+          border:
+              Border.all(color: Color.fromARGB(255, 106, 105, 105), width: 1.0),
+        ),
         child: Row(
           children: <Widget>[
             Flexible(
               child: TextField(
                 controller: _textController,
                 onSubmitted: _handleSubmitted,
-                decoration:
-                    InputDecoration.collapsed(hintText: "Send a message"),
+                decoration: const InputDecoration.collapsed(
+                  hintText: "Message",
+                  border: InputBorder.none,
+                ),
+                style: const TextStyle(fontFamily: 'Roboto'),
               ),
             ),
             IconButton(
-              icon: Icon(Icons.send),
+              icon: const Icon(Icons.arrow_upward_outlined),
               onPressed: () => _handleSubmitted(_textController.text),
             ),
           ],