XkbAddDeviceLedInfo man page on Debian

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XkbAddDeviceLedInfo(3)		 XKB FUNCTIONS		XkbAddDeviceLedInfo(3)

NAME
       XkbAddDeviceLedInfo - Initialize an XkbDeviceLedInfoRec structure

SYNOPSIS
       XkbDeviceLedInfoPtr  XkbAddDeviceLedInfo (XkbDeviceInfoPtr device_info,
	      unsigned int led_class, unsigned int led_id);

ARGUMENTS
       - device_info
	      structure in which to add LED info

       - led_class
	      input extension class for LED device of interest

       - led_id
	      input extension ID for LED device of interest

DESCRIPTION
       XkbAddDeviceLedInfo first checks	 to  see  whether  an  entry  matching
       led_class  and led_id already exists in the device_info->leds array. If
       it finds a matching entry, it returns a pointer to that	entry.	Other‐
       wise,  it  checks  to  be  sure	there  is  at least one empty entry in
       device_info->leds and extends it if there is not enough room.  It  then
       increments  device_info->num_leds and fills in the next available entry
       in device_info->leds with led_class and led_id.

       If successful, XkbAddDeviceLedInfo returns  a  pointer  to  the	XkbDe‐
       viceLedInfoRec  structure  that	was initialized. If unable to allocate
       sufficient storage, or if device_info points to an invalid XkbDeviceIn‐
       foRec structure, or if led_class or led_id are inappropriate, XkbAddDe‐
       viceLedInfo returns NULL.

       To allocate additional space for button actions in an  XkbDeviceInfoRec
       structure, use XkbResizeDeviceButtonActions.

STRUCTURES
       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;

SEE ALSO
       XkbResizeDeviceButtonActions(3)

X Version 11			 libX11 1.3.3		XkbAddDeviceLedInfo(3)
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