[Feature request] expose allowImplicitScrolling in ExtendedImageGesturePageView

[lsthye]

Platforms

dart

Description

Hi

I'd like to request that ExtendedImageGesturePageView expose the allowImplicitScrolling property from GesturePageView.

Why

Currently, when using ExtendedImageGesturePageView I have a different loading/caching requirement which cause split second blank/loading state while swiping horizontally even when I use precacheImage.

Flutter's PageView solves this with allowImplicitScrolling = true, which keeps the previous and next page alive in the viewport. That completely removes the blank-page flash in my tests.

I saw that a preloadPagesCount option was introduced before, but later removed due to issues. I understand why, it introduced more complexity and maintenance overhead.

However, my request is simpler:
👉 Just expose allowImplicitScrolling so we can opt into Flutter’s built-in page caching behavior.
This keeps the library clean, uses Flutter’s intended API, and lets developers handle heavier preloading separately if needed.

Proposed API

ExtendedImageGesturePageView.builder(
  allowImplicitScrolling: true, // just passed down to GesturePageView
  ...
)

Benefits

• Removes “blank page” issue when swiping horizontally.
• Aligns with Flutter’s own PageView API.
• Minimal code change, no need to reintroduce preloadPagesCount.

Thanks for the great work on this library 🙏