I'm using AutoTabsRouter.pageView, with a BottomNavigationBar.

I am listening to the route change to rebuild my BottomNavigationBar, such that it correctly styles tabs to show selection.

One can change pages by either, tapping a tab button, or swiping the pageview left/right.

If using the swipe gesture to change the page, AND changing from a higher page index to a lower one, the AutoTabsRouter does not fire the didChangeTabRoute observers - hence my application is not aware that the app navigation has changed, and I cannot paint the UI to reflect this state.

I guess it doesn't really matter what I'm doing with the observer event, the key is that AutoTabsRouter.pageView doesnt notify observers consistently.

I've tracked this down to auto_tabs_router.dart:524

When "decrementing" the activeIndex, the toInt() on line 520 causes the controllerPage variable to equal the new page index, rather than the intended previous one - hence line 524 evaluates to false, and _didChangeTabRoute() is not called.

I'll have a crack at it - looks like a simple fix, but I may very well be misunderstanding why you truncated the page index variable...