ItemSelectionController class

Controls a selection within indexed child widgets.

ItemSelectionController detects tap, long-press, and drag gestures, and performs appropriate selection actions based on its selection mode.

Example

Widget build(BuildContext context) {
  return ItemSelectionController(
    child: ListView.builder(
      itemCount: 100,
      itemBuilder: (BuildContext context, int index) {
        return ItemSelectionBuilder(
          index: index,
          builder: (BuildContext context, int index, bool selected) {
            return Text('$index: $selected');
          },
        );
      },
    ),
  );
}

Inheritance

Object
DiagnosticableTree
Widget
StatefulWidget
ItemSelectionController

Constructors

ItemSelectionController({Key? key, required Widget child, ItemSelection? selection, ItemSelectionMode? selectionMode, ItemSelectionActionCallback? onSelectionStart, ItemSelectionActionCallback? onSelectionUpdate, ItemSelectionActionCallback? onSelectionEnd, EdgeInsets? scrollInsets, Duration? scrollDuration}): Creates an item selection controller.

Properties

child → Widget: final
hashCode → int: The hash code for this object.
no setterinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
selection → ItemSelection: Returns the current selection.
no setter

Methods

createElement() → StatefulElement: Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _ItemSelectionControllerState: 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}) → 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

Static Methods

of(BuildContext context) → ItemSelectionController?: Returns an ItemSelectionController instance for the given build context, or null if not found.