Column class

Lays out its children in a vertical line.

Children take their natural height. Wrap one in Expanded to give it the height left over, or in Flexible to let it take up to a share of it; put a SizedBox(height: …) between children for a fixed gap. A column fills the available height unless mainAxisSize is MainAxisSize.min.

Children that don't fit are clipped. With assertions enabled, the overflowing edge is marked; make long content scroll with a ListView or ScrollView instead.

Inheritance

• Object
• Widget
• RenderObjectWidget
• MultiChildRenderObjectWidget
• Flex
• Column

Available extensions

• AnimateExtension

Constructors

Column({Key? key, MainAxisSize mainAxisSize = MainAxisSize.max, MainAxisAlignment mainAxisAlignment = MainAxisAlignment.start, CrossAxisAlignment crossAxisAlignment = CrossAxisAlignment.start, List<Widget> children = const []})

const

Properties

children → List<Widget>

The widgets below this widget in the tree, in layout and paint order.

final, inherited

crossAxisAlignment → CrossAxisAlignment

How the children are placed across the main axis. CrossAxisAlignment.stretch makes them fill it.

final, inherited

direction → Axis

The axis the children are laid out along.

final, inherited

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

final, inherited

mainAxisAlignment → MainAxisAlignment

How the children are placed along the main axis when there is space left over.

final, inherited

mainAxisSize → MainAxisSize

Whether this widget fills the free space on its main axis (MainAxisSize.max, the default) or shrinks to its children (MainAxisSize.min).

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

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() → MultiChildRenderObjectElement

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.

inherited

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 RenderFlex 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.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited