+/*
+ * AT-SPI - Assistive Technology Service Provider Interface
+ * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
+ *
+ * Copyright 2001, 2002 Sun Microsystems Inc.,
+ * Copyright 2001, 2002 Ximian, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
#ifndef _SPI_LISTENER_H_
#define _SPI_LISTENER_H_
+#include <cspi/spi-impl.h>
-#ifdef __cplusplus
+#ifdef __cplusplus
extern "C" {
-#endif /* __cplusplus */
+#endif
-#include "accessibleeventlistener.h"
+/**
+ * AccessibleEvent:
+ * @type: a string representing the type of the event, with increasing specificity
+ * from left to right, delimited by colons. Leftmost token represents event source type,
+ * next token represents event category, and next token represents the subcategory
+ * of the event, for instance the specific property, state, or attribute being notified.
+ * @source: The #Accessible from which the event originated.
+ * @detail1: an event-type-specific integer value.
+ * @detail2: an event-type-specific integer value.
+ *
+ * A structure used to encapsulate event information.
+ **/
+typedef struct {
+ const char *type;
+ Accessible *source;
+ long detail1;
+ long detail2;
+} AccessibleEvent;
+
+/**
+ *AccessibleDeviceEventType:
+ *@SPI_KEY_PRESSED: A device key has been pressed.
+ *@SPI_KEY_RELEASED: A device key has been released.
+ *@SPI_BUTTON_PRESSED: A device button or switch (other than a keyboard key)
+ * has been pressed.
+ *@SPI_BUTTON_RELEASED: A device button or switch has been released.
+ *
+ *The type of an AccessibleDeviceEvent.
+ **/
+typedef enum {
+ SPI_KEY_PRESSED = 1<<0,
+ SPI_KEY_RELEASED = 1<<1,
+ SPI_BUTTON_PRESSED = 1<<2,
+ SPI_BUTTON_RELEASED = 1<<3
+} AccessibleDeviceEventType;
-/*
+/**
+ *AccessibleKeyEventType:
*
- * Structure used to encapsulate event information
+ *This is a synonym for AccessibleDeviceEventType
+ **/
+typedef AccessibleDeviceEventType AccessibleKeyEventType;
+
+/**
+ * AccessibleDeviceEvent:
+ * @keyID: Symbolic representation for the key or switch generating the event, e.g. keysym or button number.
+ * @keystring: A symbolic name for the key or switch, or, if is_text is true, a string approximating the
+ * inserted text characters which would result from this event, if a text entry field has keyboard focus.
+ * @timestamp: A time in ms when this event occurred, relative to some unspecified starting point.
+ * Timestamp values should therefore be used to compare events but should not be tested against a
+ * fixed time.
+ * @type: The #AccessibleDeviceEventType identifying the specific type of event.
+ * @is_text: A boolean value indicating whether the event represents 'printable' text (i.e. whether it
+ * changes the current insertion buffer of a focussed text entry component or not). Whitespace
+ * is considered "printable" in this context, since it typically inserts characters into the buffer.
*
- */
+ * A structure encapsulating information relevant to a device event notification.
+ **/
+typedef struct {
+ long keyID;
+ short keycode;
+ char * keystring;
+ long timestamp;
+ AccessibleDeviceEventType type;
+ unsigned short modifiers;
+ SPIBoolean is_text;
+} AccessibleDeviceEvent;
-typedef Accessibility_Event AccessibleEvent;
+typedef AccessibleDeviceEvent AccessibleKeystroke;
/*
- *
* Function prototype typedefs for Event Listener Callbacks.
- * (see libspi/accessibleeventlistener.h for definition of VoidEventListenerCB).
+ * (see libspi/accessibleeventlistener.h for definition of SpiVoidEventListenerCB).
*
* usage: signatures should be
* void (*AccessibleEventListenerCB) (AccessibleEvent *event);
*
- * void (*KeystrokeListenerCB) (KeystrokeEvent *Event);
+ * SPIBoolean (*AccessibleKeystrokeListenerCB) (AccessibleKeystrokeEvent *Event);
+ * Note that AccessibleKeystrokeListeners may consume the event received
+ * if one of their callbacks returns TRUE (see SPI_registerAccessibleKeystrokeListener)
*/
-typedef VoidEventListenerCB AccessibleEventListenerCB;
-typedef VoidEventListenerCB KeystrokeListenerCB;
-
-typedef struct _KeystrokeListener {
- KeystrokeListenerCB callback;
-} KeystrokeListener;
+/**
+ * AccessibleEventListenerCB:
+ * @event: The event for which notification is sent.
+ * @user_data: User data which is passed to the callback each time a notification takes place.
+ *
+ * A function prototype for callbacks via which clients are notified of AT-SPI events.
+ *
+ **/
+typedef void (*AccessibleEventListenerCB) (const AccessibleEvent *event,
+ void *user_data);
+/**
+ * AccessibleKeystrokeListenerCB:
+ * @stroke: the #AccessibleKeystroke event for which notification is taking place.
+ * @user_data: data passed to the callback each time it is notified, according to the data
+ * which was passed in when the listener/callback was registered.
+ *
+ * A function prototype for a callback function called when a key event notification takes place.
+ *
+ * Returns: %TRUE if the client wishes to consume the event and prevent its
+ * dispatch to other listeners or the currently focussed application, if
+ * the relevant callback was registered with the #SPI_KEYLISTENER_CANCONSUME flag.
+ **/
+typedef SPIBoolean (*AccessibleKeystrokeListenerCB) (const AccessibleKeystroke *stroke,
+ void *user_data);
+/**
+ * AccessibleDeviceListenerCB:
+ * @stroke: The #AccessibleDeviceEvent for which notification is being received.
+ * @user_data: Data which is passed to the client each time this callback is notified.
+ *
+ * A callback function prototype via which clients receive device event notifications.
+ *
+ * Returns: %TRUE if the client wishes to consume/preempt the event, preventing it from being
+ * relayed to the currently focussed application, %FALSE if the event delivery should proceed as normal.
+ **/
+typedef SPIBoolean (*AccessibleDeviceListenerCB) (const AccessibleDeviceEvent *stroke,
+ void *user_data);
-#ifdef __cplusplus
+#ifdef __cplusplus
}
-#endif /* __cplusplus */
-
+#endif
#endif
projects / platform / core / uifw / at-spi2-atk.git / blobdiff