button_group_m3e changelog | Flutter package

0.3.1 #

New: expanded and linearMainAxisAlignment options for non-wrap layouts. When expanded is true, the group uses MainAxisSize.max and aligns items per linearMainAxisAlignment (or mapped from alignment). This enables internal center/right alignment without extra wrappers.
Fix: Connected + menu overflow now consistently inserts a 2px gap before the overflow trigger (when showDividers=false) and uses a stricter width-fitting algorithm with a small epsilon to eliminate minor RenderFlex overflows.
UX: Dropdown overflow popup is anchored bottom-right of the overflow button, has intrinsic width to fit its buttons, and aligns its internal buttons to the right.

Breaking: Removed legacy children parameter. Use actions: List<ButtonGroupM3EAction> instead.
Breaking: Renamed groupSelection API to selection for clarity.
Added ButtonGroupM3EAction as the sole way to define buttons in a group.
Added connected selection corner logic: only outer ends round; inner corners use token square radius; selected buttons fully round.
Added 2px gap between connected buttons (when showDividers=false) and before overflow trigger.
Added per-corner shape application via new cornerRadiusOverride in ButtonM3E to support mixed rounded/square corners in groups.
Added new anchored dropdown overflow menu (default) using overflowMenuStyle: ButtonGroupM3EOverflowMenuStyle.dropdown; bottom sheet alternative retained (bottomSheet).
Overflow trigger now rendered as a ButtonM3E for visual consistency.
Improved overflow fitting algorithm (exact iterative width packing + epsilon) to eliminate minor RenderFlex pixel overflows.
Added right-alignment support: maps crossAxisAlignment for linear layouts and allows popup buttons to align right.
Misc: Refined measurement pass; popup menu intrinsic width matches widest action; dismissal on outside tap.

New: Overflow handling options for non-wrapping groups via overflow parameter:
- menu (new default): show as many children as fit and place the rest in a bottom sheet opened by a trailing overflow icon.
- scroll: allow scrolling along the axis under bounded constraints.
- none: no special handling.
Behavior: The default overflow changed from scroll to menu for a better UX in constrained layouts.
Implementation: Converted ButtonGroupM3E to a StatefulWidget to measure child extents and avoid overflow.
Tests: Added tests for scroll, wrap, vertical, and menu overflow scenarios.

Prevent RenderFlex overflow in non-wrapping groups by auto-enabling scroll when axis constraints are bounded.
Added widget tests covering horizontal/vertical bounded scenarios and wrap behavior.