Positioned class final

Places its child at the given offset (and optional size) inside a Stack.

width / height of null mean "use the child's intrinsic size on that axis." Using this widget outside a Stack is supported but the position is ignored — the child paints at the parent's normal layout position.

Inheritance

• Object
• Widget
• RenderObjectWidget
• SingleChildRenderObjectWidget
• Positioned

Available extensions

• AnimateExtension

Constructors

Positioned({Key? key, int left = 0, int top = 0, int? width, int? height, required Widget child})

const

Properties

child → Widget?

The widget below this widget in the tree.

final, inherited

hashCode → int

The hash code for this object.

no setter, inherited

height → int?

Child height in rows, or null to use its intrinsic height.

final

key → Key?

final, inherited

left → int

Horizontal offset from the stack's left edge, in cells.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

top → int

Vertical offset from the stack's top edge, in rows.

final

width → int?

Child width in cells, or null to use its intrinsic width.

final

Methods

animate({Duration? duration, Curve? curve, Object? trigger, bool repeat = false}) → Animate

Available on Widget, provided by the AnimateExtension extension

Starts an Animate chain over this widget. duration / curve apply to the whole chain. With no trigger it plays on mount; with a non-null trigger it rests on mount and replays whenever the token changes.

createElement() → SingleChildRenderObjectElement

Creates the Element that will mount this widget into the tree.

inherited

createRenderObject(BuildContext context) → RenderObject

Creates the render object backing this widget. Called once when the element first mounts.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

updateRenderObject(BuildContext context, covariant RenderPositioned renderObject) → void

Applies any changes from a new widget instance to the existing render object. Default is a no-op; subclasses override when the widget carries layout/paint configuration.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited