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-only, inherited
hashCode int
The hash code for this object.
read-only, inherited
mounted bool
Whether this State object is currently in a tree.
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
widget Form
The current configuration.
read-only, inherited

Methods

activate() → void
Called when this object is reinserted into the tree after having been removed via deactivate.
@mustCallSuper, @protected, 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.
@mustCallSuper, @protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
didChangeDependencies() → void
Called when a dependency of this State object changes.
@mustCallSuper, @protected, inherited
didUpdateWidget(covariant Form oldWidget) → void
Called whenever the widget configuration changes.
@mustCallSuper, @protected, inherited
dispose() → void
Called when this object is removed from the tree permanently.
@mustCallSuper, @protected, inherited
initState() → void
Called when this object is inserted into the tree.
@mustCallSuper, @protected, 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.
@mustCallSuper, @protected, 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.
@protected, 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