NAME¶
XkbNoteDeviceChanges - Note device changes reported in an
XkbExtensionDeviceNotify event
SYNOPSIS¶
void XkbNoteDeviceChanges (XkbDeviceChangesPtr
old, XkbExtensionDeviceNotifyEvent
*new, unsigned int wanted);
ARGUMENTS¶
- - old
- structure tracking state changes
- - new
- event indicating state changes
- - wanted
- mask indicating changes to note
DESCRIPTION¶
The
wanted field specifies the changes that should be noted in
old, and is composed of the bitwise inclusive OR of one or more of the
masks from Table 1. The
reason field of the event in
new
indicates the types of changes the event is reporting.
XkbNoteDeviceChanges updates the XkbDeviceChangesRec specified by
old with the changes that are both specified in
wanted and
contained in
new->reason.
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
To update a local copy of the state and configuration of an X input extension
device with the changes previously noted in an XkbDeviceChangesRec structure,
use
XkbGetDeviceInfoChanges.
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;
SEE ALSO¶
XkbGetDeviceInfoChanges(3)
