Flutter Expanded class

Flutter Expanded widget that expands a child of a Row, Column, or Flex so that the child fills the available space.

Using an flutter Expanded widget makes a child of a Row, Column, or Flex expand to fill the available space along the main axis (e.g., horizontally for a Row or vertically for a Column). If multiple children are expanded, the available space is divided among them according to the flex factor.

An Expanded widget must be a descendant of a Row, Column, or Flex, and the path from the Expanded widget to its enclosing Row, Column, or Flex must contain only StatelessWidgets or StatefulWidgets (not other kinds of widgets, like RenderObjectWidgets).

See also:

• Flexible, which does not force the child to fill the available space.
• Spacer, a widget that takes up space proportional to its flex value.
• The catalog of layout widgets.

Constructor

Expanded({Key key, int flex: 1, @required Widget child})
Creates a widget that expands a child of a Row, Column, or Flex so that the child fills the available space along the flex widget's main axis.
const

Properties

child → Widget
The widget below this widget in the tree. [...]final, 
inherited

debugTypicalAncestorWidgetClass → Type
The RenderObjectWidget that is typically used to set up the ParentData that applyParentData will write to. [...]read-only, 
inherited

fit → FlexFit
How a flexible child is inscribed into the available space. [...]
final, inherited

flex → int
The flex factor to use for this child [...]
final, inherited

hashCode → int
The hash code for this object. [...]@nonVirtual, read-only,
inherited

key → Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited

runtimeType → Type
A representation of the runtime type of the object.read-only, 
inherited

Methods

applyParentData(RenderObject renderObject) → void
Write the data from this widget into the given render object's parent data. [...]
inherited

createElement() → ParentDataElement<FlexParentData>
Inflates this configuration to a concrete instance. [...]
inherited

debugCanApplyOutOfTurn() → bool
Whether the ParentDataElement.applyWidgetOutOfTurn method is allowed with this widget. [...]
@protected, inherited

debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited

debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
inherited

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 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
Returns 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. [...]
@nonVirtual, inherited

Source Website api.flutter.dev

https://api.flutter.dev/flutter/widgets/SafeArea-class.html