[syncfusion_flutter_pdfviewer] - Scrollbar track does not respond to tap/click to jump to position

[BennyKirschner]

Use case

The DesktopScrollbar used by SfPdfViewer on desktop platforms does not support clicking on the scrollbar track to jump to that scroll position. Currently, the scrollbar only supports dragging the thumb.

Expected Behavior
Clicking on the scrollbar track (outside the thumb) should jump the scroll position to the corresponding location in the document, consistent with native scrollbar behavior on Windows, macOS, and Linux.

Current Behavior
Clicking on the scrollbar track does nothing. Only dragging the thumb moves the scroll position.

Proposal

In desktop_scrollbar.dart, the GestureDetector only wraps the scrollbar thumb Container and only handles onVerticalDragStart/onVerticalDragUpdate/onVerticalDragEnd. There is no tap handler on the track area. The MouseRegion wrapping the track provides hover/cursor behavior but no tap interaction.

[BennyKirschner]

I opened a PR that should fix this issue #2503

[Vikassekar]

Thank you for sharing your proposal and providing the patch that allows the scrollbar to jump to the corresponding location in the document when clicking on the scrollbar track.

We have considered your requirement of enhancing the document navigation by clicking on the scrollbar track on desktop platforms as a feature from our end, but we do not have any immediate plans to implement this feature.

The status of implementation can be tracked through the feedback portal link below: Enhanced Document Navigation via Scrollbar Click in Flutter | Feedback Portal

Please note that, although the Flutter PdfViewer source code is publicly available on GitHub for transparency, we do not accept direct contributions to the repository. This policy ensures consistency and quality across all releases. Nevertheless, your feedback and suggestions are highly valued, and we encourage you to continue sharing ideas through our official support channels.
Thank you for your understanding and continued support.