XGetDeviceModifierMapping(3X11) 				    X FUNCTIONS 				   XGetDeviceModifierMapping(3X11)

NAME

       XGetDeviceModifierMapping, XSetDeviceModifierMapping - query or change device modifier mappings

SYNTAX

	XSetDeviceModifierMapping(display, device, modmap)
	     Display *display;
	     XDevice *device;
	     XModifierKeymap  *modmap;

       XModifierKeymap *XGetDeviceModifierMapping(display, device)
	     Display *display;
	     XDevice *device;

ARGUMENTS

       display	   Specifies the connection to the X server.

       device	   Specifies the device whose modifier mapping is to be queried or modified.

       modmap	   Specifies a pointer to the XModifierKeymap structure.

DESCRIPTION

       The  XSetDeviceModifierMapping  request	specifies  the	KeyCodes  of  the keys (if any) that are to be used as modifiers for the specified
       device.	If it succeeds, the X server generates a DeviceMappingNotify event, and XSetDeviceModifierMapping returns MappingSuccess.  X  per-
       mits at most eight modifier keys.  If more than eight are specified in the XModifierKeymap structure, a BadLength error results.

       The  modifiermap  member of the XModifierKeymap structure contains eight sets of max_keypermod KeyCodes, one for each modifier in the order
       Shift, Lock, Control, Mod1, Mod2, Mod3, Mod4, and Mod5.	Only nonzero KeyCodes have meaning in each set, and zero KeyCodes are ignored.	In
       addition,  all of the nonzero KeyCodes must be in the range specified by min_keycode and max_keycode as returned by XListInputDevices, or a
       BadValue error results.	No KeyCode may appear twice in the entire map, or a BadValue error results.

       An X server can impose restrictions on how modifiers can be changed, for example, if certain keys do not generate up transitions  in  hard-
       ware,  if auto-repeat cannot be disabled on certain keys, or if multiple modifier keys are not supported.  If some such restriction is vio-
       lated, the status reply is MappingFailed, and none of the modifiers are changed.  If the new KeyCodes specified for a modifier differ  from
       those  currently defined and any (current or new) keys for that modifier are in the logically down state, XSetDeviceModifierMapping returns
       MappingBusy, and none of the modifiers is changed.

       XSetDeviceModifierMapping can generate BadLengthP, BadDevice, BadMatch, BadAlloc, and BadValue errors.

       The XGetDeviceModifierMapping request returns a pointer to a newly created XModifierKeymap structure that contains the keys being  used	as
       modifiers.   The structure should be freed after use by calling XFreeModifierMapping .  If only zero values appear in the set for any modi-
       fier, that modifier is disabled.

       XGetDeviceModifierMapping can generate BadDevice and BadMatch errors.

STRUCTURES

       The XModifierKeymap structure contains:

       typedef struct {
	    int max_keypermod;
	    KeyCode *modifiermap;
       } XModifierKeymap;

DIAGNOSTICS

       BadLength   More than eight keys were specified in the XModifierKeymap structure.

       BadAlloc    The server failed to allocate the requested resource or server memory.

       BadDevice   An invalid device was specified.  The specified device does not exist or has not been opened by this client	via  XOpenInputDe-
		   vice.  This error may also occur if the specified device is the X keyboard or X pointer device.

       BadMatch    This  error may occur if an XGetDeviceModifierMapping or XChangeDeviceModifierMapping request was made specifying a device that
		   has no keys.

       BadValue    Some numeric value falls outside the range of values accepted by the request.  Unless a specific  range  is	specified  for	an
		   argument,  the full range defined by the argument's type is accepted.  Any argument defined as a set of alternatives can gener-
		   ate this error.

SEE ALSO

       XSetDeviceKeyMapping(3X11)
       XSetDeviceButtonMapping(3X11)
       Programming With Xlib

X Version 11							     Release 6					   XGetDeviceModifierMapping(3X11)