2010-05-18 13:28:54 -06:00
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XSELECTEXTENSIONEVENT(libmansuffix)
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===================================
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NAME
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----
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XSelectExtensionEvent, XGetSelectedExtensionEvents - select
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extension events, get the list of currently selected extension
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events
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SYNOPSIS
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--------
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#include <X11/extensions/XInput.h>
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XSelectExtensionEvent( Display *display,
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Window w,
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XEventClass *event_list,
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int event_count);
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XGetSelectedExtensionEvents( Display *display,
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Window w,
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2010-09-04 04:16:57 -06:00
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int *this_client_event_count_return,
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XEventClass **this_client_event_list_return,
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int *all_clients_event_count_return,
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XEventClass **all_clients_event_list_return);
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2010-05-18 13:28:54 -06:00
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display
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Specifies the connection to the X server.
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w
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Specifies the window whose events you are interested in.
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event_list
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Specifies the list of event classes that describe the
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events you are interested in.
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event_count
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Specifies the count of event classes in the event list.
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this_client_event_count_return
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Returns the count of event classes selected by this
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client.
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this_client_event_list_return
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Returns a pointer to the list of event classes selected
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by this client.
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all_clients_event_count_return
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Returns the count of event classes selected by all
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clients.
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all_clients_event_list_return
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Returns a pointer to the list of event classes selected
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by all clients.
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DESCRIPTION
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-----------
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The XSelectExtensionEvent request causes the X server to report
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the events associated with the specified list of event classes.
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Initially, X will not report any of these events. Events are
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reported relative to a window. If a window is not interested in
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a device event, it usually propagates to the closest ancestor
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that is interested, unless the do_not_propagate mask prohibits
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it.
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Multiple clients can select for the same events on the same
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window with the following restrictions:
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* Multiple clients can select events on the same window
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because their event masks are disjoint. When the X server
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generates an event, it reports it to all interested
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clients.
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* Only one client at a time can select a DeviceButtonPress
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event with automatic passive grabbing enabled, which is
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associated with the event class DeviceButtonPressGrab. To
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receive DeviceButtonPress events without automatic passive
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grabbing, use event class DeviceButtonPress but do not
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specify event class DeviceButtonPressGrab.
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The server reports the event to all interested clients.
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Information contained in the XDevice structure returned by
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XOpenDevice is used by macros to obtain the event classes that
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clients use in making XSelectExtensionEvent requests. Currently
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defined macros include DeviceKeyPress, DeviceKeyRelease,
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DeviceButtonPress, DeviceButtonRelese, DeviceMotionNotify,
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DeviceFocusIn, DeviceFocusOut, ProximityIn, ProximityOut,
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DeviceStateNotify, DeviceMappiingNotify, ChangeDeviceNotify,
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DevicePointerMotionHint, DeviceButton1Motion,
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DeviceButton2Motion, DeviceButton3Motion, DeviceButton4Motion,
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DeviceButton5Motion, DeviceButtonMotion, DeviceOwnerGrabButton,
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DeviceButtonPressGrab, and NoExtensionEvent.
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To obtain the proper event class for a particular device, one
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of the above macros is invoked using the XDevice structure for
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that device. For example,
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DeviceKeyPress (*device, type, eventclass);
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returns the DeviceKeyPress event type and the eventclass for
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selecting DeviceKeyPress events from this device.
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XSelectExtensionEvent can generate a BadWindow or BadClass
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error. The XGetSelectedExtensionEvents request reports the
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extension events selected by this client and all clients for
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the specified window. This request returns pointers to two
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XEventClass arrays. One lists the input extension events
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selected by this client from the specified window. The other
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lists the event classes selected by all clients from the
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specified window. You should use XFree to free these two
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arrays.
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XGetSelectedExtensionEvents can generate a BadWindow error.
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DIAGNOSTICS
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-----------
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BadWindow
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A value for a Window argument does not name a defined
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window.
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BadClass
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A value for an XEventClass is invalid.
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