indexd_stack_dev 0.1.7

A high-performance lazy-loading IndexedStack for Flutter that initializes pages only when needed.

0.1.7

🐛 Fixes

• Layout-contract crash with cached pages: _RenderLazyStack.performLayout now lays out every attached child each pass, not just the active and outgoing ones. Cached (loaded but inactive) pages are real, mounted subtrees; skipping their layout left them in NEEDS-LAYOUT, so a cached page containing a TextField (or anything whose size is later read by the host Scaffold) would throw RenderBox was not laid out: RenderEditable... NEEDS-LAYOUT. Only the active child — and the outgoing child during a transition — still drive the stack's size; painting and hit-testing remain restricted to those, so inactive pages stay invisible.
• Semantics: Added visitChildrenForSemantics so only the active page is exposed to the accessibility tree, matching stock IndexedStack behavior now that inactive pages are laid out.

0.1.5

✨ Updates & Polish

• Faster Animations: Decreased default animation duration from 250ms to 200ms for a snappier feel.
• Improved Animation Curves: Changed the shared axis slide animation curve to fastOutSlowIn and adjusted the slide offset from 15% to 7%.

0.1.4

✨ Updates & Cleanups

• Premium Animation Curves: Upgraded the Fade Through and Shared Axis transition curves to fastLinearToSlowEaseIn for a much smoother, iOS/Material 3 style spring-damped feel.
• Optimized Transition Offsets: Reduced the slide offset scale in Shared Axis transitions from 15% to 8% to create a more premium, subtle depth effect.
• Smoother Cross-fades: Fine-tuned opacity intervals for cross-fading, completely eliminating brief frame flashes during dark mode transitions.
• Codebase Polish: Cleaned up all artificial comments and explanatory text for a pristine, production-ready source code.

0.1.3

⚡ Performance & Fixes

• Strict Widget Tree Stabilization: Fixed the critical bug where tabs would rebuild on every switch. The AnimatedBuilder wrapper depth is now perfectly stable across all IndexdAnimationType transitions, ensuring Flutter never unmounts the page element.
• Zero Per-Frame Allocations: Eliminated all dynamic Animation object creation within the build() method. All ReverseAnimation and derived animation objects are now tightly pre-cached once per transition, guaranteeing ScaleTransition and FadeTransition never invoke didUpdateWidget rebuilds during layout.
• Const Inert Animations: Optimized non-participating loaded tabs to use static const kInertScale = AlwaysStoppedAnimation(1.0) and similar static wrappers. This allocates 0 bytes of memory per frame for background tabs while perfectly maintaining widget tree depth.

0.0.3

refactor: rename IndexdStackController to LazyStackController

0.0.4

enhance README.md with detailed feature descriptions and usage examples

0.0.5

update README.md

0.0.6

add canPop getter to LazyStackController

0.0.7

add memory pressure handling in

0.0.8

refactor: improved memory management and lazy loading

0.0.9

chore: rename package to indexd_stack_dev

0.1.1

🐛 Fixes

• Fixed page rebuild bug: Pages no longer rebuild continuously when animations are enabled. AnimatedBuilder is now only attached during the active 300ms transition and stripped immediately after.
• Eliminated unnecessary setState: Cache/loaded changes now use a targeted Set equality check instead of blindly calling setState(() {}).

0.1.0

⚡ Performance (Breaking)

• Custom RenderObject: Replaced Flutter's native IndexedStack with a custom _RenderLazyStack that skips layout computation entirely for inactive children. Only the active child participates in layout/paint.
• Cached Animations: All CurvedAnimation and Tween objects are now created once per transition and cached as state fields — zero per-frame allocations.
• Optimized loadedIndexes: Returns Set<int>.unmodifiable() instead of allocating a new Set on every access.
• Eliminated double eviction: switchTo no longer calls _enforceMaxSize twice.
• Removed dart:math dependency: Inlined max comparisons.

✨ Features

• Native Tab Animations: Added IndexdAnimationType enum with 5 transition styles:
  • none (zero-overhead, no AnimationController allocated)
  • fade
  • fadeThrough (Material Design spec)
  • sharedAxisHorizontal
  • sharedAxisVertical
• Dynamic Animation Toggling: Switching between none and animated types at runtime is fully supported with proper resource lifecycle management.
• Nullable AnimationController: When animation: IndexdAnimationType.none, no AnimationController is created — true zero allocation.

🔧 Breaking Changes

• Removed EQ prefix: EQLazyStackController → LazyStackController, EQLazyLoadIndexedStack → LazyLoadIndexedStack.
• Removed removableIndexes: Dead field that was never used internally.
• Changed base class: LazyLoadIndexedStack is now a StatefulWidget (was ListenableBuilder).
• Removed StackFit sizing parameter: The custom RenderObject handles sizing internally.

🐛 Fixes

• Controller now uses ChangeNotifier instead of manual listener management.
• switchTo performs synchronous eviction before notifyListeners() — no double-frame builds.
• Memory pressure handler (didHaveMemoryPressure) aggressively flushes all inactive pages.