class KeyboardEvent

package openfl.events

extends Event

Available on all platforms

A KeyboardEvent object id dispatched in response to user input through a keyboard. There are two types of keyboard events: KeyboardEvent.KEY_DOWN and KeyboardEvent.KEY_UP

Because mappings between keys and specific characters vary by device and operating system, use the TextEvent event type for processing character input.

To listen globally for key events, listen on the Stage for the capture and target or bubble phase.

Constructor

new (type:String, bubbles:Bool = false, cancelable:Bool = false, charCodeValue:Int = 0, keyCodeValue:Int = 0, ?keyLocationValue:KeyLocation, ctrlKeyValue:Bool = false, altKeyValue:Bool = false, shiftKeyValue:Bool = false, controlKeyValue:Bool = false, commandKeyValue:Bool = false)

Creates an Event object that contains specific information about keyboard events. Event objects are passed as parameters to event listeners.

Parameters:

type

The type of the event. Possible values are: KeyboardEvent.KEY_DOWN and KeyboardEvent.KEY_UP

bubbles

Determines whether the Event object participates in the bubbling stage of the event flow.

cancelable

Determines whether the Event object can be canceled.

charCodeValue

The character code value of the key pressed or released. The character code values returned are English keyboard values. For example, if you press Shift+3, the Keyboard.charCode() property returns # on a Japanese keyboard, just as it does on an English keyboard.

keyCodeValue

The key code value of the key pressed or released.

keyLocationValue

The location of the key on the keyboard.

ctrlKeyValue

On Windows, indicates whether the Ctrl key is activated. On Mac, indicates whether either the Ctrl key or the Command key is activated.

altKeyValue

Indicates whether the Alt key modifier is activated(Windows only).

shiftKeyValue

Indicates whether the Shift key modifier is activated.

commandKeyValue

Indicates whether the Command key modifier is activated.

Variables

altKey:Bool

Indicates whether the Alt key is active(true) or inactive (false) on Windows; indicates whether the Option key is active on Mac OS.

charCode:Int

Contains the character code value of the key pressed or released. The character code values are English keyboard values. For example, if you press Shift+3, charCode is # on a Japanese keyboard, just as it is on an English keyboard.

Note: When an input method editor(IME) is running, charCode does not report accurate character codes.

commandKey:Bool

controlKey:Bool

ctrlKey:Bool

On Windows and Linux, indicates whether the Ctrl key is active (true) or inactive(false); On Mac OS, indicates whether either the Ctrl key or the Command key is active.

keyCode:Int

The key code value of the key pressed or released.

Note: When an input method editor(IME) is running, keyCode does not report accurate key codes.

keyLocation:KeyLocation

Indicates the location of the key on the keyboard. This is useful for differentiating keys that appear more than once on a keyboard. For example, you can differentiate between the left and right Shift keys by the value of this property: KeyLocation.LEFT for the left and KeyLocation.RIGHT for the right. Another example is differentiating between number keys pressed on the standard keyboard (KeyLocation.STANDARD) versus the numeric keypad (KeyLocation.NUM_PAD).

shiftKey:Bool

Indicates whether the Shift key modifier is active(true) or inactive(false).

Static variables

staticinline read onlyKEY_DOWN:String = "keyDown"

The KeyboardEvent.KEY_DOWN constant defines the value of the type property of a keyDown event object.

This event has the following properties:

staticinline read onlyKEY_UP:String = "keyUp"

The KeyboardEvent.KEY_UP constant defines the value of the type property of a keyUp event object.

This event has the following properties:

Inherited Variables

Defined by Event

read onlybubbles:Bool

Indicates whether an event is a bubbling event. If the event can bubble, this value is true; otherwise it is false.

When an event occurs, it moves through the three phases of the event flow: the capture phase, which flows from the top of the display list hierarchy to the node just before the target node; the target phase, which comprises the target node; and the bubbling phase, which flows from the node subsequent to the target node back up the display list hierarchy.

Some events, such as the activate and unload events, do not have a bubbling phase. The bubbles property has a value of false for events that do not have a bubbling phase.

read onlycancelable:Bool

Indicates whether the behavior associated with the event can be prevented. If the behavior can be canceled, this value is true; otherwise it is false.

read onlycurrentTarget:Any

The object that is actively processing the Event object with an event listener. For example, if a user clicks an OK button, the current target could be the node containing that button or one of its ancestors that has registered an event listener for that event.

read onlyeventPhase:EventPhase

The current phase in the event flow. This property can contain the following numeric values:

  • The capture phase(EventPhase.CAPTURING_PHASE).
  • The target phase(EventPhase.AT_TARGET).
  • The bubbling phase(EventPhase.BUBBLING_PHASE).

read onlytarget:Any

The event target. This property contains the target node. For example, if a user clicks an OK button, the target node is the display list node containing that button.

read onlytype:String

The type of event. The type is case-sensitive.

Inherited Methods

Defined by Event

clone ():Event

Duplicates an instance of an Event subclass.

Returns a new Event object that is a copy of the original instance of the Event object. You do not normally call clone(); the EventDispatcher class calls it automatically when you redispatch an event - that is, when you call dispatchEvent(event) from a handler that is handling event.

The new Event object includes all the properties of the original.

When creating your own custom Event class, you must override the inherited Event.clone() method in order for it to duplicate the properties of your custom class. If you do not set all the properties that you add in your event subclass, those properties will not have the correct values when listeners handle the redispatched event.

In this example, PingEvent is a subclass of Event and therefore implements its own version of clone().

Returns:

A new Event object that is identical to the original.

formatToString (className:String, ?p1:Dynamic, ?p2:Dynamic, ?p3:Dynamic, ?p4:Dynamic, ?p5:Dynamic):String

isDefaultPrevented ():Bool

Checks whether the preventDefault() method has been called on the event. If the preventDefault() method has been called, returns true; otherwise, returns false.

Returns:

If preventDefault() has been called, returns true; otherwise, returns false.

preventDefault ():Void

Cancels an event's default behavior if that behavior can be canceled. Many events have associated behaviors that are carried out by default. For example, if a user types a character into a text field, the default behavior is that the character is displayed in the text field. Because the TextEvent.TEXT_INPUT event's default behavior can be canceled, you can use the preventDefault() method to prevent the character from appearing. An example of a behavior that is not cancelable is the default behavior associated with the Event.REMOVED event, which is generated whenever Flash Player is about to remove a display object from the display list. The default behavior (removing the element) cannot be canceled, so the preventDefault() method has no effect on this default behavior. You can use the Event.cancelable property to check whether you can prevent the default behavior associated with a particular event. If the value of Event.cancelable is true, then preventDefault() can be used to cancel the event; otherwise, preventDefault() has no effect.

stopImmediatePropagation ():Void

Prevents processing of any event listeners in the current node and any subsequent nodes in the event flow. This method takes effect immediately, and it affects event listeners in the current node. In contrast, the stopPropagation() method doesn't take effect until all the event listeners in the current node finish processing.

Note: This method does not cancel the behavior associated with this event; see preventDefault() for that functionality.

stopPropagation ():Void

Prevents processing of any event listeners in nodes subsequent to the current node in the event flow. This method does not affect any event listeners in the current node(currentTarget). In contrast, the stopImmediatePropagation() method prevents processing of event listeners in both the current node and subsequent nodes. Additional calls to this method have no effect. This method can be called in any phase of the event flow.

Note: This method does not cancel the behavior associated with this event; see preventDefault() for that functionality.

toString ():String

Returns a string containing all the properties of the Event object. The string is in the following format:

[Event type=_value_ bubbles=_value_ cancelable=_value_]

Returns:

A string containing all the properties of the Event object.