xenocara/lib/libX11/man/xkb/XkbAddDeviceLedInfo.man
2007-09-30 10:11:57 +00:00

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.TH XkbAddDeviceLedInfo __libmansuffix__ __xorgversion__ "XKB FUNCTIONS"
.SH NAME
XkbAddDeviceLedInfo \- Initialize an XkbDeviceLedInfoRec structure
.SH SYNOPSIS
.B XkbDeviceLedInfoPtr XkbAddDeviceLedInfo
(
.I device_info,
.I led_class,
.I led_id
)
.br
XkbDeviceInfoPtr \fIdevice_info\fP\^;
.br
unsigned int \fIled_class\fP\^;
.br
unsigned int \fIled_id\fP\^;
.if n .ti +5n
.if t .ti +.5i
.SH ARGUMENTS
.TP
.I \- device_info
structure in which to add LED info
.TP
.I \- led_class
input extension class for LED device of interest
.TP
.I \- led_id
input extension ID for LED device of interest
.SH DESCRIPTION
.LP
.I XkbAddDeviceLedInfo
first checks to see whether an entry matching
.I led_class
and
.I led_id
already exists in the
.I device_info->leds
array. If it finds a matching entry, it returns a pointer to that entry. Otherwise, it checks to be sure
there is at least one empty entry in
.I device_info->leds
and extends it if there is not enough room. It then increments
.I device_info->num_leds
and fills in the next available entry in
.I device_info->leds
with
.I led_class
and
.I led_id.
If successful,
.I XkbAddDeviceLedInfo
returns a pointer to the XkbDeviceLedInfoRec structure that was initialized. If unable to allocate
sufficient storage, or if
.I device_info
points to an invalid XkbDeviceInfoRec structure, or if
.I led_class
or
.I led_id
are inappropriate,
.I XkbAddDeviceLedInfo
returns NULL.
To allocate additional space for button actions in an XkbDeviceInfoRec structure, use
.I XkbResizeDeviceButtonActions.
.SH STRUCTURES
.LP
Information about X Input Extension devices is transferred between a client program and the Xkb
extension in an XkbDeviceInfoRec structure:
.nf
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;
.fi
.SH "SEE ALSO"
.BR XkbResizeDeviceButtonActions (__libmansuffix__)