MacosPulldownButton constructor

const MacosPulldownButton({ Key? key, required List<MacosPulldownMenuEntry>? items, String? title, String? disabledTitle, IconData? icon, VoidCallback? onTap, TextStyle? style, double? itemHeight = _kMenuItemHeight, FocusNode? focusNode, bool autofocus = false, AlignmentGeometry alignment = AlignmentDirectional.centerStart, PulldownMenuAlignment menuAlignment = PulldownMenuAlignment.left, })

Creates a macOS-style pull-down button.

If items is null, the button will be disabled, the down caret icon will be greyed out.

A title or an icon must be provided, to be displayed as the pull-down button's title, but not both at the same time.

If the button is disabled and icon is null, disabledTitle will be displayed if it is non-null. If disabledTitle is null, then title will be displayed if it is non-null.

The autofocus argument must not be null.

Implementation

const MacosPulldownButton({
  super.key,
  required this.items,
  this.title,
  this.disabledTitle,
  this.icon,
  this.onTap,
  this.style,
  this.itemHeight = _kMenuItemHeight,
  this.focusNode,
  this.autofocus = false,
  this.alignment = AlignmentDirectional.centerStart,
  this.menuAlignment = PulldownMenuAlignment.left,
})  : assert(itemHeight == null || itemHeight >= _kMenuItemHeight),
      assert(
          (title != null || icon != null) && !(title != null && icon != null),
          "There should be either a title or an icon argument provided, and not both at at the same time.");