XCloseDevice man page on Peanut

Man page or keyword search:  
man Server   7435 pages
apropos Keyword Search (all sections)
Output format
Peanut logo
[printable version]

XOPENDEVICE(3)			     libXi			XOPENDEVICE(3)

NAME
       XOpenDevice, XCloseDevice - open or close an extension input device

SYNTAX
       #include <X11/extensions/XInput.h>

       XDevice *XOpenDevice(Display *display, XID device_id);

       XCloseDevice(Display *display, XDevice *device);

ARGUMENTS
       display
	  Specifies the connection to the X server.

       device_id
	  Specifies the id of the device to be opened

       device
	  Specifies the device to be closed

DESCRIPTION
       The XOpenDevice request makes an input device accessible to a client
       through input extension protocol requests. If successful, it returns a
       pointer to an XDevice structure.

       The XCloseDevice request makes an input device inaccessible to a client
       through input extension protocol requests. Before terminating, and
       client that has opened input devices through the input extension should
       close them via CloseDevice.

       When a client makes an XCloseDevice request, any active grabs that the
       client has on the device are released. Any event selections that the
       client has are deleted, as well as any passive grabs. If the requesting
       client is the last client accessing the device, the server may disable
       all access by X to the device.

       XOpenDevice and XCloseDevice can generate a BadDevice error.

STRUCTURES
       The XDevice structure returned by XOpenDevice contains:

			  typedef struct {
			  XID device_id;
			  int num_classes;
			  XInputClassInfo *classes;
			  } XDevice;

       The classes field is a pointer to an array of XInputClassInfo
       structures. Each element of this array contains an event type base for
       a class of input supported by the specified device. The num_classes
       field indicates the number of elements in the classes array.

       The XInputClassInfo structure contains:

			  typedef struct {
			      unsigned char input_class;
			      unsigned char event_type_base;
			  } XInputClassInfo;

       The input_class field identifies one class of input supported by the
       device. Defined types include KeyClass, ButtonClass, ValuatorClass,
       ProximityClass, FeedbackClass, FocusClass, and OtherClass. The
       event_type_base identifies the event type of the first event in that
       class.

       The information contained in the XInputClassInfo structure is used by
       macros to obtain the event classes that clients use in making
       XSelectExtensionEvent requests. Currently defined macros include
       DeviceKeyPress, DeviceKeyRelease, DeviceButtonPress,
       DeviceButtonRelese, DeviceMotionNotify, DeviceFocusIn, DeviceFocusOut,
       ProximityIn, ProximityOut, DeviceStateNotify, DeviceMappingNotify,
       ChangeDeviceNotify, DevicePointerMotionHint, DeviceButton1Motion,
       DeviceButton2Motion, DeviceButton3Motion, DeviceButton4Motion,
       DeviceButton5Motion, DeviceButtonMotion, DeviceOwnerGrabButton,
       DeviceButtonPressGrab, and NoExtensionEvent.

       To obtain the proper event class for a particular device, one of the
       above macros is invoked using the XDevice structure for that device.
       For example,

			  DeviceKeyPress (*device, type, eventclass);

       returns the DeviceKeyPress event type and the eventclass for
       DeviceKeyPress events from the specified device.

       This eventclass can then be used in an XSelectExtensionEvent request to
       ask the server to send DeviceKeyPress events from this device. When a
       selected event is received via XNextEvent, the type can be used for
       comparison with the type in the event.

DIAGNOSTICS
       BadDevice
	  An invalid device was specified. The specified device does not
	  exist, or is the X keyboard or X pointer. This error may also occur
	  if some other client has caused the specified device to become the X
	  keyboard or X pointer device via the XChangeKeyboardDevice or
	  XChangePointerDevice requests.

				  03/04/2009			XOPENDEVICE(3)
[top]

List of man pages available for Peanut

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net