NAME
XkbSetDeviceInfo - Modify some or all of the characteristics of an X
Input Extension device
SYNOPSIS
Bool XkbSetDeviceInfo (Display *dpy, unsigned int which,
XkbDeviceInfoPtr device_info);
ARGUMENTS
- dpy connection to X server
- which
mask indicating characteristics to modify
- device_info
structure defining the device and modifications
DESCRIPTION
To change characteristics of an X Input Extension device in the server,
first modify a local copy of the device structure and then use either
XkbSetDeviceInfo, or, to save network traffic, use an
XkbDeviceChangesRec structure and call XkbChangeDeviceInfo to download
the changes to the server.
XkbSetDeviceInfo sends a request to the server to modify the
characteristics of the device specified in the device_info structure.
The particular characteristics modified are identified by the bits set
in which and take their values from the relevant fields in device_info
(see Table 1). XkbSetDeviceInfo returns True if the request was
successfully sent to the server. If the X server implementation does
not allow interaction between the X input extension and the Xkb
Extension, the function does nothing and returns False.
Table 1 XkbDeviceInfoRec Mask Bits
____________________________________________________________________________________
Name XkbDeviceInfoRec Value Capability If Set
Fields Effected
____________________________________________________________________________________
XkbXI_KeyboardsMask (1L <<0) Clients can use all
Xkb requests and events
with KeyClass devices
supported by the input
device extension.
XkbXI_ButtonActionsMask num_btns (1L <<1) Clients can assign key
btn_acts actions to buttons
non-KeyClass input
extension devices.
XkbXI_IndicatorNamesMask leds->names (1L <<2) Clients can assign
names to indicators on
non-KeyClass input
extension devices.
XkbXI_IndicatorMapsMask leds->maps (1L <<3) Clients can assign
indicator maps to
indicators on
non-KeyClass input
extension devices.
XkbXI_IndicatorStateMask leds->state (1L <<4) Clients can request
the status of indicators
on non-KeyClass input
extension devices.
XkbXI_IndicatorsMask sz_leds (0x1c) XkbXI_IndicatorNamesMask |
num_leds XkbXI_IndicatorMapsMask |
leds->* XkbXI_IndicatorStateMask
XkbXI_UnsupportedFeaturesMask unsupported (1L <<15)
XkbXI_AllDeviceFeaturesMask Those selected (0x1e) XkbXI_IndicatorsMask |
by Value Column XkbSI_ButtonActionsMask
masks
XkbXI_AllFeaturesMask Those selected (0x1f) XkbSI_AllDeviceFeaturesMask |
by Value Column XkbSI_KeyboardsMask
masks
XkbXI_AllDetailsMask Those selected (0x801f) XkbXI_AllFeaturesMask |
by Value column XkbXI_UnsupportedFeaturesMask
masks
The which parameter specifies which aspects of the device should be
changed and is a bitmask composed of an inclusive OR or one or more of
the following bits: XkbXI_ButtonActionsMask, XkbXI_IndicatorNamesMask,
XkbXI_IndicatorMapsMask. If the features requested to be manipulated in
which are valid for the device, but the server does not support
assignment of one or more of them, that particular portion of the
request is ignored.
If the device specified in device_info->device_spec does not contain
buttons and a request affecting buttons is made, or the device does not
contain indicators and a request affecting indicators is made, a
BadMatch protocol error results.
If the XkbXI_ButtonActionsMask bit is set in the supported mask
returned by XkbGetDeviceInfo, the Xkb extension allows applications to
assign key actions to buttons on input extension devices other than the
core keyboard device. If the XkbXI_ButtonActionsMask is set in which,
the actions for all buttons specified in device_info are set to the
XkbActions specified in device_info->btn_acts. If the number of
buttons requested to be updated is not valid for the device,
XkbSetDeviceInfo returns False and a BadValue protocol error results.
If the XkbXI_IndicatorMaps and / or XkbXI_IndicatorNamesMask bit is set
in the supported mask returned by XkbGetDeviceInfo, the Xkb extension
allows applications to assign maps and / or names to the indicators of
nonkeyboard extension devices. If supported, maps and / or names can be
assigned to all extension device indicators, whether they are part of a
keyboard feedback or part of an indicator feedback.
If the XkbXI_IndicatorMapsMask and / or XkbXI_IndicatorNamesMask flag
is set in which, the indicator maps and / or names for all
device_info->num_leds indicator devices specified in device_info->leds
are set to the maps and / or names specified in device_info->leds.
device_info->leds->led_class and led_id specify the input extension
class and device ID for each indicator device to modify; if they have
invalid values, a BadValue protocol error results and XkbSetDeviceInfo
returns False. If they have legal values but do not specify a keyboard
or indicator class feedback for the device in question, a BadMatch
error results. If any of the values in device_info->leds->names are
not a valid Atom or None, a BadAtom protocol error results.
RETURN VALUES
True The XkbSetDeviceInfo function returns True if the
request was successfully sent to the server.
False The XkbSetDeviceInfo function returns False if the X
server implementation does not allow interaction between
the X input extension and the Xkb Extension.
STRUCTURES
Changes to an Xkb extension device may be tracked by listening to
XkbDeviceExtensionNotify events and accumulating the changes in an
XkbDeviceChangesRec structure. The changes noted in the structure may
then be used in subsequent operations to update either a server
configuration or a local copy of an Xkb extension device configuration.
The changes structure is defined as follows:
typedef struct _XkbDeviceChanges {
unsigned int changed; /∗ bits indicating what has changed */
unsigned short first_btn; /∗ number of first button which changed, if any */
unsigned short num_btns; /∗ number of buttons that have changed */
XkbDeviceLedChangesRec leds;
} XkbDeviceChangesRec,*XkbDeviceChangesPtr;
DIAGNOSTICS
BadAtom A name is neither a valid Atom or None
BadMatch A compatible version of Xkb was not available in the
server or an argument has correct type and range, but is
otherwise invalid
BadValue An argument is out of range
SEE ALSO
XkbChangeDeviceInfo(3), XkbGetDeviceInfo(3)