[Feature request] Add scroll deceleration factor

[flt-phy]

Hi there! Currently, GestureSettings exposes scrollDecelerationEnabled to control whether a deceleration animation occurs after a user finishes a scroll/pan gesture. While this flag works as expected on Android to toggle the fling/inertia effect, it has no effect on iOS.

When a user scrolls the map on iOS, the map continues coasting for a significant amount of time before coming to a complete stop. This takes longer than expected compared to native iOS scrolling behaviors, and there is currently no way to disable or fine-tune this deceleration via the Flutter plugin.

It looks like in the native Mapbox iOS SDK, this behavior is managed via GestureOptions.panDecelerationFactor (I could be wrong). It would be a great to have native deceleration tuning in Flutter.

Thank you in advance

Screen.Recording.2026-06-04.at.20.19.12.mov

[maios]

Hi @flt-phy, thank you for reporting, we have created an internal issue https://mapbox.atlassian.net/browse/MAPSFLT-627 to track this :)

[O-Hannonen]

Hi @flt-phy, the imparity between Android and iOS is now fixed, so starting from v2.27.0 its possible to use GestureSettings.scrollDecelerationEnabled on iOS as well.

We have created another internal issue of the request to expose the deceleration factor for finer control over the animation, but its blocked since Android SDK does not have anything similar to panDecelerationFactor yet. https://mapbox.atlassian.net/browse/MAPSFLT-647

[flt-phy]

@O-Hannonen hi there, thank you for the fix!

Curious to see the deceleration factor! Even if it would work only on iOS it would be much helpful for us (at least because we prefer short android-style deceleration to be on iOS)