Encrypted messaging app
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import 'package:flutter/material.dart';
@immutable
class CustomTitleBar extends StatelessWidget with PreferredSizeWidget {
const CustomTitleBar({
Key? key,
required this.title,
required this.showBack,
this.rightHandButton,
this.backgroundColor,
}) : super(key: key);
final Text title;
final bool showBack;
final IconButton? rightHandButton;
final Color? backgroundColor;
@override
Size get preferredSize => const Size.fromHeight(kToolbarHeight);
@override
Widget build(BuildContext context) {
return AppBar(
elevation: 0,
automaticallyImplyLeading: false,
backgroundColor:
backgroundColor != null ?
backgroundColor! :
Theme.of(context).appBarTheme.backgroundColor,
flexibleSpace: SafeArea(
child: Container(
padding: const EdgeInsets.only(right: 16),
child: Row(
children: <Widget>[
showBack ?
_backButton(context) :
const SizedBox.shrink(),
showBack ?
const SizedBox(width: 2,) :
const SizedBox(width: 15),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
title,
],
),
),
rightHandButton != null ?
rightHandButton! :
const SizedBox.shrink(),
],
),
),
),
);
}
Widget _backButton(BuildContext context) {
return IconButton(
onPressed: (){
Navigator.pop(context);
},
icon: Icon(
Icons.arrow_back,
color: Theme.of(context).appBarTheme.iconTheme?.color,
),
);
}
}