InputDecorator class Null safety

Defines the appearance of a Material Design text field.

InputDecorator displays the visual elements of a Material Design text field around its input child. The visual elements themselves are defined by an InputDecoration object and their layout and appearance depend on the baseStyle, textAlign, isFocused, and isEmpty parameters.

TextField uses this widget to decorate its EditableText child.

InputDecorator can be used to create widgets that look and behave like a TextField but support other kinds of input.

Requires one of its ancestors to be a Material widget. The child widget, as well as the decorative widgets specified in decoration, must have non-negative baselines.

See also:



InputDecorator({Key? key, required InputDecoration decoration, TextStyle? baseStyle, TextAlign? textAlign, TextAlignVertical? textAlignVertical, bool isFocused = false, bool isHovering = false, bool expands = false, bool isEmpty = false, Widget? child})
Creates a widget that displays a border, labels, and icons, for a TextField.


baseStyle TextStyle?
The style on which to base the label, hint, counter, and error styles if the decoration does not provide explicit styles.
child Widget?
The widget below this widget in the tree.
decoration InputDecoration
The text and styles to use when decorating the child.
expands bool
If true, the height of the input field will be as large as possible.
hashCode int
The hash code for this object.
@nonVirtual, read-only, inherited
isEmpty bool
Whether the input field is empty.
isFocused bool
Whether the input field has focus.
isHovering bool
Whether the input field is being hovered over by a mouse pointer.
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
textAlign TextAlign?
How the text in the decoration should be aligned horizontally.
textAlignVertical TextAlignVertical?
How the text should be aligned vertically.


createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
createState() State<InputDecorator>
Creates the mutable state for this widget at a given location in the tree.
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.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
toString({DiagnosticLevel minLevel =}) String
A string representation of this object.
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants.
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object.
toStringShort() String
A short, textual description of this widget.


operator ==(Object other) bool
The equality operator.
@nonVirtual, inherited

Static Methods

containerOf(BuildContext context) RenderBox?
The RenderBox that defines this decorator's "container". That's the area which is filled if InputDecoration.filled is true. It's the area adjacent to InputDecoration.icon and above the widgets that contain InputDecoration.helperText, InputDecoration.errorText, and InputDecoration.counterText.