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app.dart
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app.dart
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// Copyright 2019 The Flutter team. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/material.dart';
import 'package:gallery/data/gallery_options.dart';
import 'package:gallery/l10n/gallery_localizations.dart';
import 'package:gallery/layout/adaptive.dart';
import 'package:gallery/studies/shrine/backdrop.dart';
import 'package:gallery/studies/shrine/category_menu_page.dart';
import 'package:gallery/studies/shrine/expanding_bottom_sheet.dart';
import 'package:gallery/studies/shrine/home.dart';
import 'package:gallery/studies/shrine/login.dart';
import 'package:gallery/studies/shrine/model/app_state_model.dart';
import 'package:gallery/studies/shrine/page_status.dart';
import 'package:gallery/studies/shrine/scrim.dart';
import 'package:gallery/studies/shrine/supplemental/layout_cache.dart';
import 'package:gallery/studies/shrine/theme.dart';
import 'package:scoped_model/scoped_model.dart';
class ShrineApp extends StatefulWidget {
const ShrineApp({Key key, this.navigatorKey}) : super(key: key);
final GlobalKey<NavigatorState> navigatorKey;
@override
_ShrineAppState createState() => _ShrineAppState();
}
class _ShrineAppState extends State<ShrineApp> with TickerProviderStateMixin {
// Controller to coordinate both the opening/closing of backdrop and sliding
// of expanding bottom sheet
AnimationController _controller;
// Animation Controller for expanding/collapsing the cart menu.
AnimationController _expandingController;
AppStateModel _model;
Map<String, List<List<int>>> _layouts = {};
@override
void initState() {
super.initState();
_controller = AnimationController(
vsync: this,
duration: const Duration(milliseconds: 450),
value: 1,
);
_expandingController = AnimationController(
duration: const Duration(milliseconds: 500),
vsync: this,
);
_model = AppStateModel()..loadProducts();
}
@override
void dispose() {
_controller.dispose();
_expandingController.dispose();
super.dispose();
}
Widget mobileBackdrop() {
return Backdrop(
frontLayer: const ProductPage(),
backLayer: CategoryMenuPage(onCategoryTap: () => _controller.forward()),
frontTitle: const Text('SHRINE'),
backTitle: Text(GalleryLocalizations.of(context).shrineMenuCaption),
controller: _controller,
);
}
Widget desktopBackdrop() {
return DesktopBackdrop(
frontLayer: ProductPage(),
backLayer: CategoryMenuPage(),
);
}
// Closes the bottom sheet if it is open.
Future<bool> _onWillPop() async {
final status = _expandingController.status;
if (status == AnimationStatus.completed ||
status == AnimationStatus.forward) {
_expandingController.reverse();
return false;
}
return true;
}
@override
Widget build(BuildContext context) {
final bool isDesktop = isDisplayDesktop(context);
final Widget backdrop = isDesktop ? desktopBackdrop() : mobileBackdrop();
return ScopedModel<AppStateModel>(
model: _model,
child: WillPopScope(
onWillPop: _onWillPop,
child: MaterialApp(
navigatorKey: widget.navigatorKey,
title: 'Shrine',
debugShowCheckedModeBanner: false,
home: LayoutCache(
layouts: _layouts,
child: PageStatus(
menuController: _controller,
cartController: _expandingController,
child: HomePage(
backdrop: backdrop,
scrim: Scrim(controller: _expandingController),
expandingBottomSheet: ExpandingBottomSheet(
hideController: _controller,
expandingController: _expandingController,
),
),
),
),
initialRoute: '/login',
onGenerateRoute: _getRoute,
theme: shrineTheme.copyWith(
platform: GalleryOptions.of(context).platform,
),
// L10n settings.
localizationsDelegates: GalleryLocalizations.localizationsDelegates,
supportedLocales: GalleryLocalizations.supportedLocales,
locale: GalleryOptions.of(context).locale,
),
),
);
}
}
Route<dynamic> _getRoute(RouteSettings settings) {
if (settings.name != '/login') {
return null;
}
return MaterialPageRoute<void>(
settings: settings,
builder: (context) => LoginPage(),
fullscreenDialog: true,
);
}