FocusController class Null safety

Represents a focus controller for a FormControl.

Inheritance

Constructors

FocusController({FocusNode? focusNode})
Constructs an instance of the focus controller. [...]

Properties

disposed bool
read / write
focusNode FocusNode
Gets the UI focus node registered with the controller.
read-only
hasFocus bool
Gets the focus state of the focus controller.
read-only
hashCode int
The hash code for this object. [...]
read-only, inherited
hasListeners bool
Whether any listeners are currently registered. [...]
@protected, read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes. [...]
inherited
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener and removeListener will throw after the object is disposed). [...]
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
notifyListeners() → void
Call all the registered listeners. [...]
onControlFocusChanged(bool hasFocus) → void
This method is called from FormControl to notify the controller that the focus in the control has changed. [...]
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes. [...]
inherited
toString() String
A string representation of this object. [...]
inherited
updateFocus(bool hasFocus, {bool emitEvent = true}) → void
Update the focus state for controller. [...]

Operators

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