feat: dynamic nav bar based on tab

lib/src/ui/home/home.dart

@@ -20,7 +20,6 @@ class _HomeState extends State<Home> with SingleTickerProviderStateMixin {
   final conversationManager = ConversationManager();
 
   // Bottom Bar navigation
-  final List<String> titleList = ["Contacts", "Conversations", "Settings"];
   int _tabNumber = 1;
   List<IconData> itemsList = [
     Icons.contacts,
@@ -75,7 +74,7 @@ class _HomeState extends State<Home> with SingleTickerProviderStateMixin {
     return Scaffold(
       key: _scaffoldKey,
       body: Column(children: <Widget>[
-        TopBar(title: titleList[_tabNumber]),
+        TopBar(state: _tabNumber),
         Expanded(
             child: TabBarView(
                 physics: NeverScrollableScrollPhysics(),

lib/src/ui/home/widgets/conversation_item.dart

@@ -41,7 +41,7 @@ class _ConversationItemState extends State<ConversationItem> {
   Widget build(BuildContext context) {
     return Material(
         type: MaterialType.transparency,
-        elevation: 0,
+        elevation: 1,
         child: InkWell(
             onTap: () async {
               await bus.publish(

lib/src/ui/home/widgets/top_bar.dart

@@ -3,10 +3,11 @@ import "package:flutter/material.dart";
 import "search_input.dart";
 
 class TopBar extends StatelessWidget {
-  final String title;
+  final int state;
   final String logo = "assets/logo.png";
+  final List<String> titleList = ["Contacts", "Conversations", "Settings"];
 
-  TopBar({@required this.title});
+  TopBar({@required this.state});
 
   @override
   Widget build(BuildContext context) {
@@ -16,7 +17,7 @@ class TopBar extends StatelessWidget {
         type: MaterialType.canvas,
         elevation: 5.0,
         child: Container(
-          padding: EdgeInsets.only(top: statusbarHeight, bottom: 2.0),
+          padding: EdgeInsets.only(top: statusbarHeight, bottom: 0),
           child: Material(
               type: MaterialType.transparency,
               elevation: 0.0,
@@ -34,10 +35,22 @@ class TopBar extends StatelessWidget {
                                 .display2
                                 .copyWith(fontWeight: FontWeight.w400))),
                     Spacer(),
-                    Text(title,
+                    Text(titleList[state],
                         style: Theme.of(context).accentTextTheme.display1),
                     Spacer(),
-                    IconButton(icon: Icon(Icons.add_comment), onPressed: () {})
+                    (state == 1)
+                        ? IconButton(
+                            icon: Icon(Icons.add_comment), onPressed: () {})
+                        : Container(),
+                    (state == 0)
+                        ? IconButton(icon: Icon(Icons.add), onPressed: () {})
+                        : Container(),
+                    (state == 2)
+                        ? Opacity(
+                            opacity: 0.0,
+                            child: IconButton(
+                                icon: Icon(Icons.edit), onPressed: () {}))
+                        : Container(),
                   ],
                 ),
               ])),