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LEARN ABOUT X11R4

xkbnotedevicechanges

XkbNoteDeviceChanges(3) 					   XKB FUNCTIONS					   XkbNoteDeviceChanges(3)

NAME

       XkbNoteDeviceChanges - Note device changes reported in an XkbExtensionDeviceNotify event

SYNOPSIS

       void XkbNoteDeviceChanges ( old, new, wanted )
	     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 XkbDe-
       viceChangesRec structure, use XkbGetDeviceInfoChanges.

STRUCTURES

       Changes to an Xkb extension device may be tracked by listening to XkbDeviceExtensionNotify events and accumulating the changes in an XkbDe-
       viceChangesRec structure. The changes noted in the structure may then be used in subsequent operations to update either a server configura-
       tion 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)

X Version 11							   libX11 1.2.1 					   XkbNoteDeviceChanges(3)