SliverPositioned class

A widget that controls where a box child of a SliverStack is positioned.

A SliverPositioned widget must be a descendant of a SliverStack, and the path from the SliverPositioned widget to its enclosing SliverStack must contain only StatelessWidgets or StatefulWidgets (not other kinds of widgets, like RenderObjectWidgets).

Inheritance

Constructors

SliverPositioned({Key? key, double? left, double? top, double? right, double? bottom, double? width, double? height, required Widget child})
Creates a widget that controls where a child of a Stack is positioned.
const
SliverPositioned.directional({Key? key, required TextDirection textDirection, double? start, double? top, double? end, double? bottom, double? width, double? height, required Widget child})
Creates a widget that controls where a child of a Stack is positioned.
factory
SliverPositioned.fill({Key? key, double? left = 0.0, double? top = 0.0, double? right = 0.0, double? bottom = 0.0, required Widget child})
Creates a Positioned object with left, top, right, and bottom set to 0.0 unless a value for them is passed.
const
SliverPositioned.fromRect({Key? key, required Rect rect, required Widget child})
Creates a Positioned object with the values from the given Rect.
SliverPositioned.fromRelativeRect({Key? key, required RelativeRect rect, required Widget child})
Creates a Positioned object with the values from the given RelativeRect.

Properties

bottom → double?
The distance that the child's bottom edge is inset from the bottom of the stack.
final
child → Widget
The widget below this widget in the tree.
finalinherited
debugTypicalAncestorWidgetClass → Type
Describes the RenderObjectWidget that is typically used to set up the ParentData that applyParentData will write to.
no setteroverride
debugTypicalAncestorWidgetDescription → String
Describes the RenderObjectWidget that is typically used to set up the ParentData that applyParentData will write to.
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
height → double?
The child's height.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
left → double?
The distance that the child's left edge is inset from the left of the stack.
final
The distance that the child's right edge is inset from the right of the stack.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
top → double?
The distance that the child's top edge is inset from the top of the stack.
final
width → double?
The child's width.
final

Methods

applyParentData(RenderObject renderObject) → void
Write the data from this widget into the given render object's parent data.
override
createElement() → ParentDataElement<SliverStackParentData>
Inflates this configuration to a concrete instance.
inherited
debugCanApplyOutOfTurn() → bool
Whether the ParentDataElement.applyWidgetOutOfTurn method is allowed with this widget.
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
debugIsValidRenderObject(RenderObject renderObject) → bool
Checks if this widget can apply its parent data to the provided renderObject.
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