XkbAllocDeviceInfo(3) XKB FUNCTIONS XkbAllocDeviceInfo(3)

NAME

XkbAllocDeviceInfo - Obtain an XkbDeviceInfoRec structure

SYNOPSIS

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

ARGUMENTS

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

DESCRIPTION

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
initialized to zero. If sz_leds is nonzero, sz_leds
XkbDeviceLedInfoRec structures are also allocated and linked into the
XkbDeviceInfoRec structure. If you request XkbDeviceLedInfoRec
structures be allocated using this request, you must initialize them
explicitly, by using XkbAddDeviceLedInfo(3).

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

XkbAddDeviceLedInfo(3)

X Version 11 libX11 1.8.10 XkbAllocDeviceInfo(3)