XkbNoteDeviceChanges(3)
NAME
XkbNoteDeviceChanges - Note device changes reported in an XkbExtensionDeviceNotify event
SYNOPSIS
void XkbNoteDeviceChanges (XkbDeviceChangesPtr old, XkbExtensionDevi- ceNotifyEvent *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;