IndexedStack class Null safety

A Stack that shows a single child from a list of children.

The displayed child is the one with the given index. The stack is always as big as the largest child.

If value is null, then nothing is displayed.

link
This example shows a IndexedStack widget being used to lay out one card at a time from a series of cards, each keeping their respective states.
To create a local project with this code sample, run:
flutter create --sample=widgets.IndexedStack.1 mysample

See also:

Inheritance

Constructors

IndexedStack({Key? key, AlignmentGeometry alignment = AlignmentDirectional.topStart, TextDirection? textDirection, StackFit sizing = StackFit.loose, int? index = 0, List<Widget> children = const <Widget>[]})
Creates a Stack widget that paints a single child.

Properties

alignment → AlignmentGeometry
How to align the non-positioned and partially-positioned children in the stack.
finalinherited
children → List<Widget>
The widgets below this widget in the tree.
finalinherited
clipBehavior → Clip
The content will be clipped (or not) according to this option.
finalinherited
fit → StackFit
How to size the non-positioned children in the stack.
finalinherited
hashCode → int
The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
index → int?
The index of the child to show.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
textDirection → TextDirection?
The text direction with which to resolve alignment.
finalinherited

Methods

createElement() → MultiChildRenderObjectElement
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
createRenderObject(BuildContext context) → RenderIndexedStack
Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
protected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
didUnmountRenderObject(covariant RenderObject renderObject) → void
A render object previously associated with this widget has been removed from the tree. The given RenderObject will be of the same type as returned by this object's createRenderObject.
protected">@protectedinherited
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
updateRenderObject(BuildContext context, covariant RenderIndexedStack renderObject) → void
Copies the configuration described by this RenderObjectWidget to the given RenderObject, which will be of the same type as returned by this object's createRenderObject.
override

Operators

operator ==(Object other) → bool
The equality operator.
nonVirtual">@nonVirtualinherited