splitSegmentedButtonStyle property

The style for SplitSegmentedButton.

SplitSegmentedButton is an internal Widget that by default approximates SegmentedButton.style, but with each segment being a separate OutlinedButton.

The widget is currently used for day of week selection for "weekly" frequency.

The style defaults to:

OutlinedButton.styleFrom(
  padding: RRulePickerThemeData.defaultPadding,
  foregroundColor: theme.colorScheme.onSurface,
  shape: RRulePickerThemeData.defaultSplitSegmentedButtonSegmentShape,
  side: .new(color: theme.colorScheme.outline),
  fixedSize: RRulePickerThemeData.defaultSplitSelectionButtonSegmentSize,
).copyWith(
  foregroundColor: .resolveWith((states) {
    return states.contains(WidgetState.selected)
        ? theme.colorScheme.onSecondaryContainer
        : theme.colorScheme.onSurface;
  }),
  backgroundColor: .resolveWith((states) {
    return states.contains(WidgetState.selected)
        ? theme.colorScheme.secondaryContainer
        : Colors.transparent;
  }),
  animationDuration: kThemeAnimationDuration,
)

See OutlinedButton.style and OutlinedButton.styleFrom.