KeyEvent class

A custom KeyboardEvent that attempts to eliminate cross-browser inconsistencies, and also provide both keyCode and charCode information for all key events (when such information can be determined).

KeyEvent tries to provide a higher level, more polished keyboard event information on top of the "raw" KeyboardEvent.

The mechanics of using KeyEvents is a little different from the underlying KeyboardEvent. To use KeyEvents, you need to create a stream and then add KeyEvents to the stream, rather than using the EventTarget.dispatchEvent. Here's an example usage:

// Initialize a stream for the KeyEvents:
var stream = KeyEvent.keyPressEvent.forTarget(document.body);
// Start listening to the stream of KeyEvents.
stream.listen((keyEvent) =>
    window.console.log('KeyPress event detected ${keyEvent.charCode}'));
...
// Add a new KeyEvent of someone pressing the 'A' key to the stream so
// listeners can know a KeyEvent happened.
stream.add(new KeyEvent('keypress', keyCode: 65, charCode: 97));

This class is very much a work in progress, and we'd love to get information on how we can make this class work with as many international keyboards as possible. Bugs welcome!

Implemented types

Constructors

KeyEvent(String type, {Window view, bool canBubble: true, bool cancelable: true, int keyCode: 0, int charCode: 0, int location: 1, bool ctrlKey: false, bool altKey: false, bool shiftKey: false, bool metaKey: false, EventTarget currentTarget})
Programmatically create a new KeyEvent (and KeyboardEvent).
factory
KeyEvent.wrap(KeyboardEvent parent)
Construct a KeyEvent with parent as the event we're emulating.

Properties

altKey bool
Calculated value of whether the alt key is pressed is for this event.
read-only, override
bubbles bool
read-only, inherited
cancelable bool
read-only, inherited
charCode int
Calculated value of what the estimated charCode is for this event.
read-only, override
code String
read-only, override
composed bool
read-only, inherited
ctrlKey bool
True if the ctrl key is pressed during this event.
read-only, override
currentTarget EventTarget
The currently registered target for this event.
read-only
defaultPrevented bool
read-only, inherited
detail int
read-only, override
eventPhase int
read-only, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
isComposed bool
read-only
isComposing bool
read-only, override
isTrusted bool
read-only, inherited
key String
read-only, override
keyCode int
Calculated value of what the estimated keyCode is for this event.
read-only, override
location int
Accessor to the part of the keyboard that the key was pressed from (one of KeyLocation.STANDARD, KeyLocation.RIGHT, KeyLocation.LEFT, KeyLocation.NUMPAD, KeyLocation.MOBILE, KeyLocation.JOYSTICK).
read-only, override
matchingTarget Element
A pointer to the element whose CSS selector matched within which an event was fired. If this Event was not associated with any Event delegation, accessing this value will throw an UnsupportedError.
read-only, inherited
metaKey bool
True if the Meta (or Mac command) key is pressed during this event.
read-only, override
path List<Node>
This event's path, taking into account shadow DOM. [...]
read-only, inherited
repeat bool
read-only, override
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
shiftKey bool
True if the shift key was pressed during this event.
read-only, override
sourceCapabilities InputDeviceCapabilities
read-only, override
target EventTarget
read-only, inherited
timeStamp double
read-only, inherited
type String
read-only, inherited
view WindowBase
read-only, override
which int
Calculated value of what the estimated keyCode is for this event.
read-only, override
wrapped Event
final, inherited

Methods

composedPath() List<EventTarget>
inherited
getModifierState(String keyArgument) bool
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
preventDefault() → void
inherited
stopImmediatePropagation() → void
inherited
stopPropagation() → void
inherited
toString() String
Returns a string representation of this object.
inherited

Operators

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

Static Properties

canUseDispatchEvent bool
read-only
keyDownEvent EventStreamProvider<KeyEvent>
Accessor to provide a stream of KeyEvents on the desired target.
read / write
keyPressEvent EventStreamProvider<KeyEvent>
Accessor to provide a stream of KeyEvents on the desired target.
read / write
keyUpEvent EventStreamProvider<KeyEvent>
Accessor to provide a stream of KeyEvents on the desired target.
read / write