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)
