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Accessibility::DeviceEventController Interface Reference

import "Accessibility_Registry.idl";


Public Member Functions

boolean registerKeystrokeListener (in DeviceEventListener listener, in KeySet keys, in ControllerEventMask mask, in KeyEventTypeSeq type, in EventListenerMode mode)
void deregisterKeystrokeListener (in DeviceEventListener listener, in KeySet keys, in ControllerEventMask mask, in KeyEventTypeSeq type)
boolean registerDeviceEventListener (in DeviceEventListener listener, in EventTypeSeq typeseq)
void deregisterDeviceEventListener (in DeviceEventListener listener, in EventTypeSeq typeseq)
boolean notifyListenersSync (in DeviceEvent event)
oneway void notifyListenersAsync (in DeviceEvent event)
void generateKeyboardEvent (in long keycode, in string keystring, in KeySynthType type)
void generateMouseEvent (in long x, in long y, in string eventName)


Detailed Description

The interface via which clients request notification of device events, and through which device events may be simulated.


Member Function Documentation

void Accessibility::DeviceEventController::deregisterDeviceEventListener in DeviceEventListener  listener,
in EventTypeSeq  typeseq
 

De-register a previously registered keyboard eventlistener.

Parameters:
listener,: a DeviceEventListener which will intercept events.
typeseq,: an EventTypeSeq indicating which event types to stop listening for.

void Accessibility::DeviceEventController::deregisterKeystrokeListener in DeviceEventListener  listener,
in KeySet  keys,
in ControllerEventMask  mask,
in KeyEventTypeSeq  type
 

De-register a previously registered keyboard eventlistener.

Parameters:
listener,: a DeviceEventListener which will intercept key events.
keys,: a KeySet indicating which keys to intercept, or KEYSET_ALL_KEYS.
mask,: a ControllerEventMask filtering the intercepted key events.
type,: an EventType mask that may created by ORing event types together.

void Accessibility::DeviceEventController::generateKeyboardEvent in long  keycode,
in string  keystring,
in KeySynthType  type
 

Synthesize a keyboard event.

Parameters:
keycode,: a long integer indicating the keycode of the keypress to be synthesized.
keystring,: an optional UTF-8 string indicating a complex keyboard input event.
type,: a KeySynthType indicating the type of event(s) to be synthesized: a key press, release, press-release pair, or a complex input string (for instance from an internationalized or complex text input method, or a composed character).
Note:
keycode may be truncated before being processed, as keycode length may be platform-dependent and keycode ranges are generally much smaller than CORBA_long. One or the other of keycode or keystring are generally NULL, (but not both), depending on the value of type.

void Accessibility::DeviceEventController::generateMouseEvent in long  x,
in long  y,
in string  eventName
 

Synthesize a mouse event.

Parameters:
x,: a long integer indicating the screen x coord for the mouse event.
y,: a long integer indicating the screen y coord for the mouse event.
eventName,: a string indicating the type of mouse event, e.g. "button1up"

oneway void Accessibility::DeviceEventController::notifyListenersAsync in DeviceEvent  event  ) 
 

Notify the Registry instance that a device event has taken place in an asynchronous manner. This is the method used by accessibility bridges to forward "toolkit dependent" device events to the Registry from the application's process space. If the event in question is potentially pre-emptible. notifyListenersSync should be used instead.

Note:
AT clients do not normally need to use this method, it is intended for use by toolkit bridges and special-purpose applications.

boolean Accessibility::DeviceEventController::notifyListenersSync in DeviceEvent  event  ) 
 

Notify the Registry instance that a device event has taken place, and allow pre-emptive listeners the opportunity to 'consume' the event and thus prevent its further issuance/forwarding. This is the method used by accessibility bridges to forward "toolkit dependent" device events to the Registry from the application's process space.

Note:
AT clients do not normally need to use this method, it is intended for use by toolkit bridges and special-purpose applications.
Returns:
True if the event was consumed by a (pre-emptive) listener, False if not (in which case the device event will be forwarded as normal to any application which would normally receive it, e.g. the currently active application in the case of mouse or keyboard events).

boolean Accessibility::DeviceEventController::registerDeviceEventListener in DeviceEventListener  listener,
in EventTypeSeq  typeseq
 

Register to intercept events, and either pass them on or consume them. To listen to keyboard events use registerKeystrokeListener instead.

Parameters:
listener,: a DeviceEventListener which will intercept events.
typeseq,: an EventTypeSeq indicating which event types to listen for.
Returns:
True if successful, False if not

boolean Accessibility::DeviceEventController::registerKeystrokeListener in DeviceEventListener  listener,
in KeySet  keys,
in ControllerEventMask  mask,
in KeyEventTypeSeq  type,
in EventListenerMode  mode
 

Register to intercept keyboard events, and either pass them on or consume them.

Parameters:
listener,: a DeviceEventListener which will intercept key events.
keys,: a KeySet indicating which keys to intercept, or KEYSET_ALL_KEYS.
mask,: a ControllerEventMask filtering the intercepted key events.
type,: a KeyEventTypeSeq that may created by ORing event types together.
mode,: an EventListenerMode indicating whether the listener should receive the events synchronously, potentially consuming them, or just be notified asynchronously of those events that have been generated.
Note:
Some platforms have limited support for global, preemptive EventListenerMode. Such a registration may fail if another client already has priority for preemptive access to one or more of the members of the KeySet. AT consumers have the option of re-trying the request without the global flag, or without the preemptive flag, or of re-trying with a different KeySet. The best support for pre-emptive global keyboard listeners is provided on platforms whose Xserver implementation provides the XEvIE extension.
Returns:
True if the DeviceEventListener was successfully registered for the requested KeySet, ControllerEventMask, event types, and EventListenerMode; otherwise returns False.


The documentation for this interface was generated from the following file:
Generated on Tue Jul 18 16:56:16 2006 for at-spi-idl by  doxygen 1.4.3