KeyboardHandlerMixin class

Base class for handling common key events implementing accessibility best practices.

Add onKeyPress, onKeyDown and onKeyUp event handlers to the event target and override the specific key handler methods in the view class.

Example: <button (keypress)="onKeyPress($event)" (keydown)="onKeyDown($event)" (keyup)="onKeyUp($event)">

Dart: class ButtonComponent extends KeyboardHandlerMixin { @override handleEnterKey(KeyboardEvent event) { submit(); } @override handleDownKey(KeyboardEvent event) { next(); } @override handleEscapeKey(KeyboardEvent event) { close(); } }

Implementers

• DropdownMenuComponent
• MaterialAutoSuggestInputComponent
• MaterialDatepickerComponent
• MaterialDialogComponent
• MaterialDropdownSelectComponent
• MaterialFabMenuComponent
• MaterialMenuComponent
• MaterialTimePickerComponent

Constructors

KeyboardHandlerMixin()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

isRtl ↔ bool?

Whether the direction of the component is RTL.

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

handleBackspaceKey(KeyboardEvent event) → void

handleCharCodeKey(KeyboardEvent event) → void

handleDeleteKey(KeyboardEvent event) → void

handleDownKey(KeyboardEvent event) → void

handleEndKey(KeyboardEvent event) → void

handleEnterKey(KeyboardEvent event) → void

handleEscapeKey(KeyboardEvent event) → void

handleHomeKey(KeyboardEvent event) → void

handleLeftKey(KeyboardEvent event) → void

handlePageDown(KeyboardEvent event) → void

handlePageUp(KeyboardEvent event) → void

handleRightKey(KeyboardEvent event) → void

handleSpaceKey(KeyboardEvent event) → void

handleUpKey(KeyboardEvent event) → void

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onKeyDown(KeyboardEvent event) → void

Keydown callback used to handle arrow keys.

onKeyPress(KeyboardEvent event) → void

Keypress callback used to handle enter and space keys.

onKeyUp(KeyboardEvent event) → void

Keyup callback used to handle escape keys.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited