GroupedListView<T, E> class

A groupable list of widgets similar to ListView, execpt that the items can be sectioned into groups.

See ListView.builder

Inheritance

Constructors

GroupedListView({Key? key, required List<T> elements, required E groupBy(T element), int groupComparator(E value1, E value2)?, Widget groupSeparatorBuilder(E value)?, Widget groupHeaderBuilder(T element)?, Widget itemBuilder(BuildContext context, int element)?, Widget indexedItemBuilder(BuildContext context, T element, int index)?, int itemComparator(T element1, T element2)?, GroupedListOrder order = GroupedListOrder.asc, bool sort = true, bool useStickyGroupSeparators = false, Widget separator = const SizedBox.shrink(), bool floatingHeader = false, Color stickyHeaderBackgroundColor = const Color(0xffF7F7F7), Axis scrollDirection = Axis.vertical, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool shrinkWrap = false, EdgeInsetsGeometry? padding, bool reverse = false, bool addAutomaticKeepAlives = true, bool addRepaintBoundaries = true, bool addSemanticIndexes = true, double? cacheExtent, Clip clipBehavior = Clip.hardEdge, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, DragStartBehavior dragStartBehavior = DragStartBehavior.start, String? restorationId, int? semanticChildCount, double? itemExtent, RefreshCallback? onRefresh})
Creates a GroupedListView
const

Properties

addAutomaticKeepAlives → bool
Whether to wrap each child in an AutomaticKeepAlive.
final
addRepaintBoundaries → bool
Whether to wrap each child in a RepaintBoundary.
final
addSemanticIndexes → bool
Whether to wrap each child in an IndexedSemantics.
final
cacheExtent → double?
Creates a scrollable, linear array of widgets that are created on demand.
final
clipBehavior → Clip
Defaults to Clip.hardEdge.
final
controller → ScrollController?
An object that can be used to control the position to which this scroll view is scrolled.
final
dragStartBehavior → DragStartBehavior
Determines the way that drag start behavior is handled.
final
elements → List<T>
Items of which itemBuilder or indexedItemBuilder produce the list.
final
floatingHeader → bool
Whether the group headers float over the list or occupy their own space.
final
groupBy → E Function(T element)
Defines which elements are grouped together.
final
groupComparator → int Function(E value1, E value2)?
Can be used to define a custom sorting for the groups.
final
groupHeaderBuilder → Widget Function(T element)?
Same as groupSeparatorBuilder, will be called to build group separators for each group. The passed element is always the first element of the group.
final
groupSeparatorBuilder → Widget Function(E value)?
Called to build group separators for each group. Value is always the groupBy result from the first element of the group.
final
hashCode → int
The hash code for this object.
no setterinherited
indexedItemBuilder → Widget Function(BuildContext context, T element, int index)?
Called to build children for the list with 0 <= element, index < elements.length
final
itemBuilder → Widget Function(BuildContext context, int element)?
Called to build children for the list with 0 <= element < elements.length.
final
itemComparator → int Function(T element1, T element2)?
Can be used to define a custom sorting for the elements inside each group.
final
itemExtent → double?
If non-null, forces the children to have the given extent in the scroll direction.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
keyboardDismissBehavior → ScrollViewKeyboardDismissBehavior
ScrollViewKeyboardDismissBehavior the defines how this ScrollView will dismiss the keyboard automatically.
final
onRefresh → RefreshCallback?
final
order → GroupedListOrder
Whether the order of the list is ascending or descending.
final
padding → EdgeInsetsGeometry?
The amount of space by which to inset the children.
final
physics → ScrollPhysics?
How the scroll view should respond to user input.
final
primary → bool?
Whether this is the primary scroll view associated with the parent PrimaryScrollController.
final
restorationId → String?
Restoration ID to save and restore the scroll offset of the scrollable.
final
reverse → bool
Whether the view scrolls in the reading direction.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scrollDirection → Axis
The axis along which the scroll view scrolls.
final
semanticChildCount → int?
The number of children that will contribute semantic information.
final
separator → Widget
Called to build separators for between each item in the list.
final
shrinkWrap → bool
Whether the extent of the scroll view in the scrollDirection should be determined by the contents being viewed.
final
sort → bool
Whether the elements will be sorted or not. If not it must be done manually.
final
stickyHeaderBackgroundColor → Color
Background color of the sticky header. Only used if floatingHeader is false.
final
useStickyGroupSeparators → bool
When set to true the group header of the current visible group will stick on top.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<StatefulWidget>
Creates the mutable state for this widget at a given location in the tree.
override
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.
inherited
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