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X11R7.4 - man page for xkballocdeviceinfo (x11r4 section 3)

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XkbAllocDeviceInfo(3)			  XKB FUNCTIONS 		    XkbAllocDeviceInfo(3)

       XkbAllocDeviceInfo - Obtain an XkbDeviceInfoRec structure

       XkbDeviceInfoPtr XkbAllocDeviceInfo ( device_spec, n_buttons, sz_leds )
	     unsigned int device_spec;
	     unsigned int n_buttons;
	     unsigned int sz_leds;

       - device_spec
	      device ID with which structure will be used

       - n_buttons
	      number of button actions to allocate space for

       - sz_leds
	      number of LED feedbacks to allocate space for

       XkbAllocDeviceInfo  allocates space for an XkbDeviceInfoRec structure and initializes that
       structure's device_spec field with the device ID specified by device_spec.   If	n_buttons
       is  nonzero,  n_buttons XkbActions are linked into the XkbDeviceInfoRec structure and ini-
       tialized to zero. If sz_leds is nonzero, sz_leds XkbDeviceLedInfoRec structures	are  also
       allocated  and  linked into the XkbDeviceInfoRec structure. If you request XkbDeviceLedIn-
       foRec structures be allocated using this request, you must initialize them explicitly.

       To obtain an XkbDeviceLedInfoRec structure, use XkbAllocDeviceLedInfo.

       Information about X Input Extension devices is transferred between a  client  program  and
       the Xkb extension in an XkbDeviceInfoRec structure:

	   typedef struct {
	       char *		    name;	   /* name for device */
	       Atom		    type;	   /* name for class of devices */
	       unsigned short	    device_spec;   /* device of interest */
	       Bool		    has_own_state; /* True=>this device has its own state */
	       unsigned short	    supported;	   /* bits indicating supported capabilities */
	       unsigned short	    unsupported;   /* bits indicating unsupported capabilities */
	       unsigned short	    num_btns;	   /* number of entries in btn_acts */
	       XkbAction *	    btn_acts;	   /* button actions */
	       unsigned short	    sz_leds;	   /* total number of entries in LEDs vector */
	       unsigned short	    num_leds;	   /* number of valid entries in LEDs vector */
	       unsigned short	    dflt_kbd_fb;   /* input extension ID of default (core kbd) indicator */
	       unsigned short	    dflt_led_fb;   /* input extension ID of default indicator feedback */
	       XkbDeviceLedInfoPtr  leds;	   /* LED descriptions */
	   } XkbDeviceInfoRec, *XkbDeviceInfoPtr;

	   typedef struct {
	       unsigned short	   led_class;	     /* class for this LED device*/
	       unsigned short	   led_id;	     /* ID for this LED device */
	       unsigned int	   phys_indicators;  /* bits for which LEDs physically present */
	       unsigned int	   maps_present;     /* bits for which LEDs have maps in maps */
	       unsigned int	   names_present;    /* bits for which LEDs are in names */
	       unsigned int	   state;	     /* 1 bit => corresponding LED is on */
	       Atom		   names[XkbNumIndicators];   /* names for LEDs */
	       XkbIndicatorMapRec  maps;	     /* indicator maps for each LED */
	   } XkbDeviceLedInfoRec, *XkbDeviceLedInfoPtr;


X Version 11				   libX11 1.2.1 		    XkbAllocDeviceInfo(3)
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