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Description:

pdf thumbnail

Pdf Thumbnail #

Thumbnail viewer for pdfs
Installation 💻 #
❗ In order to start using Pdf Thumbnail you must have the Flutter SDK installed on your machine.
Add pdf_thumbnail to your pubspec.yaml:
dependencies:
pdf_thumbnail:
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Install it:
flutter packages get
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Example ✍️ #
return Stack(
children: [
SizedBox(
height: MediaQuery.of(context).size.height,
width: MediaQuery.of(context).size.width,
child: PdfViewer(
filePath: snapshot.data!.path,
),
),
if (showThumbnail)
Positioned(
bottom: 0,
width: MediaQuery.of(context).size.width,
// Here's the thumbnail widget.
child: PdfThumbnail.fromFile(snapshot.data!.path),
),
],
);
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There is a detailed example app in the repo, but I've deleted iOS and Android folders.
Simple go to example folder, and run flutter create . inside the folder to add missing native files for the example app.
Demo

Caching ⏲ #
I left caching part unopinionated to keep the package simple. Just create your own class from ImageThumbnailCacher and implement the read/write methods.
Holding images as Uint8List, so Map<int, Uint8List> is what's need to be written to and read from the cache. It maps page numbers to the images.
class ThumbnailCacher implements ImageThumbnailCacher {
@override
Future<PageToImage?> read(String id) async {
return api.localStorage.readThumbnails(id);
}

@override
Future<bool> write({required String id, required PageToImage map}) {
return api.localStorage.writeThumbnails(id: id, map: map);
}
}
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I'm using Hive to cache.
Roadmap 🗺️ #

✅ Customization for colors, decoration etc.
✅ onTap callback and page number.
✅ Caching.
❌ Different layouts and scroll axises.
❌ Lazy loading.