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feat: 3129 (New PR) Allow to swipe between product images on the full…
… screen image (#3363) * feat : 3129 (New PR) Allow to swipe between product images on the full screen image * Resolved formatting issues * Made the changes suggested in PR review * Resolved formatting issues Co-authored-by: monsieurtanuki <fabrice_fontaine@hotmail.com>
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111 changes: 111 additions & 0 deletions
111
packages/smooth_app/lib/pages/product/product_image_swipeable_view.dart
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| import 'package:flutter/material.dart'; | ||
| import 'package:flutter_gen/gen_l10n/app_localizations.dart'; | ||
| import 'package:openfoodfacts/model/Product.dart'; | ||
| import 'package:provider/provider.dart'; | ||
| import 'package:smooth_app/data_models/product_image_data.dart'; | ||
| import 'package:smooth_app/database/local_database.dart'; | ||
| import 'package:smooth_app/database/transient_file.dart'; | ||
| import 'package:smooth_app/generic_lib/design_constants.dart'; | ||
| import 'package:smooth_app/generic_lib/widgets/smooth_back_button.dart'; | ||
| import 'package:smooth_app/helpers/product_cards_helper.dart'; | ||
| import 'package:smooth_app/pages/product/product_image_viewer.dart'; | ||
| import 'package:smooth_app/widgets/smooth_scaffold.dart'; | ||
|
|
||
| ///Widget to display swipeable product images of particular category, | ||
| ///Opens product image with [initialImageIndex]. | ||
| class ProductImageSwipeableView extends StatefulWidget { | ||
| const ProductImageSwipeableView({ | ||
| super.key, | ||
| required this.product, | ||
| required this.initialImageIndex, | ||
| }); | ||
| final Product product; | ||
| final int initialImageIndex; | ||
| @override | ||
| State<ProductImageSwipeableView> createState() => | ||
| _ProductImageSwipeableViewState(); | ||
| } | ||
|
|
||
| class _ProductImageSwipeableViewState extends State<ProductImageSwipeableView> { | ||
| late final LocalDatabase _localDatabase; | ||
| //Making use of [ValueNotifier] such that to avoid performance issues | ||
| //while swipping between pages by making sure only [Text] widget for product title is rebuilt | ||
| final ValueNotifier<int> _currentImageDataIndex = ValueNotifier<int>(0); | ||
| late Map<ProductImageData, ImageProvider?> _selectedImages; | ||
| late List<ProductImageData> _imageDataList; | ||
| late PageController _controller; | ||
| late final Product _initialProduct; | ||
| late Product _product; | ||
|
|
||
| ImageProvider? _provideImage(ProductImageData imageData) => | ||
| TransientFile.getImageProvider(imageData, _barcode); | ||
|
|
||
| String get _barcode => _initialProduct.barcode!; | ||
|
|
||
| @override | ||
| void initState() { | ||
| super.initState(); | ||
| _initialProduct = widget.product; | ||
| _localDatabase = context.read<LocalDatabase>(); | ||
| _localDatabase.upToDate.showInterest(_barcode); | ||
| _controller = PageController( | ||
| initialPage: widget.initialImageIndex, | ||
| ); | ||
| } | ||
|
|
||
| @override | ||
| void dispose() { | ||
| _localDatabase.upToDate.loseInterest(_barcode); | ||
| super.dispose(); | ||
| } | ||
|
|
||
| @override | ||
| Widget build(BuildContext context) { | ||
| final AppLocalizations appLocalizations = AppLocalizations.of(context); | ||
| context.watch<LocalDatabase>(); | ||
| _product = _localDatabase.upToDate.getLocalUpToDate(_initialProduct); | ||
| final List<ProductImageData> allProductImagesData = | ||
| getProductMainImagesData( | ||
| _product, | ||
| appLocalizations, | ||
| includeOther: false, | ||
| ); | ||
| _selectedImages = Map<ProductImageData, ImageProvider?>.fromIterables( | ||
| allProductImagesData, | ||
| allProductImagesData.map(_provideImage), | ||
| ); | ||
| _imageDataList = List<ProductImageData>.from(_selectedImages.keys); | ||
| return SmoothScaffold( | ||
| appBar: AppBar( | ||
| backgroundColor: Colors.black, | ||
| foregroundColor: WHITE_COLOR, | ||
| elevation: 0, | ||
| title: ValueListenableBuilder<int>( | ||
| valueListenable: _currentImageDataIndex, | ||
| builder: (_, int index, __) { | ||
| return Text( | ||
| _imageDataList[index].title, | ||
| ); | ||
| }, | ||
| ), | ||
| leading: SmoothBackButton( | ||
| iconColor: Colors.white, | ||
| onPressed: () => Navigator.maybePop(context), | ||
| ), | ||
| ), | ||
| body: PageView.builder( | ||
| onPageChanged: (int index) { | ||
| _currentImageDataIndex.value = index; | ||
| }, | ||
| controller: _controller, | ||
| itemCount: _selectedImages.keys.length, | ||
| itemBuilder: (BuildContext context, int index) { | ||
| return ProductImageViewer( | ||
| product: widget.product, | ||
| imageField: _imageDataList[index].imageField, | ||
| ); | ||
| }, | ||
| ), | ||
| ); | ||
| } | ||
| } |
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