button_group_m3e 0.3.1

Wrapper-only Button Group for Material 3 Expressive (layout, shape, size propagation).

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.

0.3.0

• 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.

0.2.0

• 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.

0.1.2

• 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.

0.1.1

• Minor internal adjustments.

0.1.0

• Changelog initialized.