CollectionWidget<T extends Widget> class Null safety

Collection widget.

Inheritance

Constructors

CollectionWidget({Key? key, required int itemCount(), required T itemForIndex(int index), void itemVisibility(Widget widget, bool visibility, List<Widget> widgets)?, Axis direction = Axis.vertical, bool reverse = false, bool shrinkWrap = false, double visibilityFraction = 0, double startFraction = 0.25, double endFraction = 0.25, VoidCallback? onStart, VoidCallback? onEnd})
Invoke itemCount and itemForIndex for collection.

Properties

direction ↔ Axis
Direction.
read / write
endFraction ↔ double
End fraction.
read / write
hashCode → int
The hash code for this object.
read-onlyinherited
itemCount ↔ int Function()
Item count callback.
read / write
itemForIndex ↔ T Function(int index)
Item for index callback.
read / write
itemVisibility ↔ (void Function(Widget widget, bool visibility, List<Widget> widgets)?)
Item visibility changes callback.
read / write
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onEnd ↔ VoidCallback?
Scroll near end callback.
read / write
onStart ↔ VoidCallback?
Scroll near start callback.
read / write
reverse ↔ bool
Reverse.
read / write
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
shrinkWrap ↔ bool
read / write
startFraction ↔ double
Start fraction.
read / write
visibilityFraction ↔ double
Visibility fraction.
read / write

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<ViewWidget>
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 non-existent 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