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 de-
vice_info->leds and extends it if there is not enough room. It then in-
crements 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 1.8.4 XkbAddDeviceLedInfo(3)
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