FormState class Null safety

State associated with a Form widget.

A FormState object can be used to save, reset, and validate every FormField that is a descendant of the associated Form.

Typically obtained via Form.of.

Inheritance

Constructors

FormState()

Properties

context BuildContext
The location in the tree where this widget builds.
read-onlyinherited
hashCode int
The hash code for this object.
read-onlyinherited
mounted bool
Whether this State object is currently in a tree.
read-onlyinherited
runtimeType Type
A representation of the runtime type of the object.
read-onlyinherited
widget Form
The current configuration.
read-onlyinherited

Methods

activate() → void
Called when this object is reinserted into the tree after having been removed via deactivate.
inherited
build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
override
deactivate() → void
Called when this object is removed from the tree.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
didChangeDependencies() → void
Called when a dependency of this State object changes.
inherited
didUpdateWidget(covariant Form oldWidget) → void
Called whenever the widget configuration changes.
inherited
dispose() → void
Called when this object is removed from the tree permanently.
inherited
initState() → void
Called when this object is inserted into the tree.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
reassemble() → void
Called whenever the application is reassembled during debugging, for example during hot reload.
inherited
reset() → void
Resets every FormField that is a descendant of this Form back to its FormField.initialValue.
save() → void
Saves every FormField that is a descendant of this Form.
setState(VoidCallback fn) → void
Notify the framework that the internal state of this object has changed.
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
toStringShort() String
A brief description of this object, usually just the runtimeType and the hashCode.
inherited
validate() bool
Validates every FormField that is a descendant of this Form, and returns true if there are no errors.

Operators

operator ==(Object other) bool
The equality operator.
inherited