FItemGroup class

An item group that groups multiple FItemMixins together.

Items grouped together will be separated by a divider, specified by divider.

Using FItemGroup in a FPopover when wrapped in a FItemGroup

When a FPopover is used inside an FItemGroup, items & groups inside the popover will inherit styling from the parent group. This happens because FPopover's content shares the same BuildContext as its child, causing data inheritance that may lead to unexpected rendering issues.

To prevent this styling inheritance, wrap the popover in a FInheritedItemData with null data to reset the inherited data:

FItemGroup(
  children: [
    FItem(title: Text('Item with popover')),
    FPopoverWrapperItem(
      popoverBuilder: (_, _) => FInheritedItemData(
        child: FItemGroup(
          children: [
            FItem(title: Text('Popover Item 1')),
            FItem(title: Text('Popover Item 2')),
          ],
        ),
      ),
      child: FButton(child: Text('Open Popover')),
    ),
  ],
);

See:

https://forui.dev/docs/data/item-group for working examples.
FItemGroupStyle for customizing a item group's appearance.

Inheritance

Mixed-in types

FItemGroupMixin

Constructors

FItemGroup.new({required List<FItemMixin> children, FItemGroupStyle style(FItemGroupStyle)?, ScrollController? scrollController, double? cacheExtent, double maxHeight = double.infinity, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollPhysics physics = const ClampingScrollPhysics(), bool? enabled, FItemDivider divider = FItemDivider.none, String? semanticsLabel, Key? key}): Creates a FItemGroup.
FItemGroup.builder({required NullableIndexedWidgetBuilder itemBuilder, int? count, FItemGroupStyle style(FItemGroupStyle)?, ScrollController? scrollController, double? cacheExtent, double maxHeight = double.infinity, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollPhysics physics = const ClampingScrollPhysics(), bool? enabled, FItemDivider divider = FItemDivider.none, String? semanticsLabel, Key? key}): Creates a FItemGroup that lazily builds its children.
FItemGroup.merge({required List<FItemGroupMixin> children, FItemGroupStyle style(FItemGroupStyle)?, ScrollController? scrollController, double? cacheExtent, double maxHeight = double.infinity, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollPhysics physics = const ClampingScrollPhysics(), bool? enabled, FItemDivider divider = FItemDivider.full, String? semanticsLabel, Key? key}): Creates a FItemGroup that merges multiple FItemGroupMixins together.

Properties

cacheExtent → double?: The scrollable area's cache extent in logical pixels.
final
divider → FItemDivider: The divider between items.
final
dragStartBehavior → DragStartBehavior: Determines the way that drag start behavior is handled. Defaults to DragStartBehavior.start.
final
enabled → bool?: True if the group is enabled. Defaults to true.
final
hashCode → int: The hash code for this object.
no setterinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
maxHeight → double: The max height, in logical pixels. Defaults to infinity.
final
physics → ScrollPhysics: The scroll physics of the group. Defaults to ClampingScrollPhysics.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
scrollController → ScrollController?: The scroll controller used to control the position to which this group is scrolled.
final
semanticsLabel → String?: The group's semantic label.
final
style → FItemGroupStyle Function(FItemGroupStyle)?: The style.
final

Methods

build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement: Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
override
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode: Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String: A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String: Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String: Returns a one-line detailed description of the object.
inherited
toStringShort() → String: A short, textual description of this widget.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited