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GNU/Linux |
Debian 7.3.0(Wheezy) |
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XkbNoteDeviceChanges(3) |
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XkbNoteDeviceChanges − Note device changes reported in an XkbExtensionDeviceNotify event
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void XkbNoteDeviceChanges |
(XkbDeviceChangesPtr old, |
XkbExtensionDeviceNotifyEvent *new, unsigned int wanted);
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− old |
structure tracking state changes |
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− new |
event indicating state changes |
− wanted
mask indicating changes to note
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
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Name XkbDeviceInfoRec Value Capability If Set
Fields Effected
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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.
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;
XkbGetDeviceInfoChanges(3)
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XkbNoteDeviceChanges(3) | |