XkbVirtualModsToReal(3) 					   XKB FUNCTIONS					   XkbVirtualModsToReal(3)

NAME

       XkbVirtualModsToReal - Determines the mapping of virtual modifiers to core X protocol modifiers

SYNOPSIS

       Bool XkbVirtualModsToReal (XkbDescPtr xkb, unsigned int virtual_mask, unsigned int *mask_rtrn);

ARGUMENTS

       - xkb  keyboard description for input device

       - virtual_mask
	      virtual modifier mask to translate

       - mask_rtrn
	      backfilled with real modifiers

DESCRIPTION

       Xkb  maintains  a  virtual  modifier  mapping, which lists the virtual modifiers associated with, or bound to, each key. The real modifiers
       bound to a virtual modifier always include all of the modifiers bound to any of the keys that specify that virtual modifier in  their  vir-
       tual  modifier  mapping.  The server.vmodmap array indicates which virtual modifiers are bound to each key; each entry is a bitmask for the
       virtual modifier bits. The server.vmodmap array is indexed by keycode.

       The vmodmap and vmods members of the server map are the "master" virtual modifier definitions. Xkb automatically propagates any changes	to
       these fields to all other fields that use virtual modifier mappings.

       For  example, if Mod3 is bound to the Num_Lock key by the core protocol modifier mapping, and the NumLock virtual modifier is bound to they
       Num_Lock key by the virtual modifier mapping, Mod3 is added to the set of modifiers associated with NumLock.

       The virtual modifier mapping is normally updated whenever actions are automatically applied to symbols and few applications should need	to
       change the virtual modifier mapping explicitly.

       Use  XkbGetMap  to get the virtual modifiers from the server or use XkbGetVirtualMods to update a local copy of the virtual modifiers bind-
       ings from the server. To set the binding of a virtual modifier to a real modifier, use XkbGetVirtualMods

       If the keyboard description defined by xkb includes bindings for virtual modifiers, XkbVirtualModsToReal uses those bindings  to  determine
       the  set of real modifiers that correspond to the set of virtual modifiers specified in virtual_mask.  The virtual_mask parameter is a mask
       specifying the virtual modifiers to translate; the i-th bit (0 relative) of the mask represents the i-th virtual modifier. If mask_rtrn	is
       non-NULL, XkbVirtualModsToReal backfills it with the resulting real modifier mask. If the keyboard description in xkb does not include vir-
       tual modifier bindings, XkbVirtualModsToReal returns False; otherwise, it returns True.

RETURN VALUES

       True	      The XkbVirtualModsToReal function returns True if the keyboard description in xkb does include virtual modifier bindings.

       False	      The XkbVirtualModsToReal function returns False if the keyboard description in xkb does not include virtual  modifier  bind-
		      ings.

SEE ALSO

       XkbGetMap(3), XkbGetVirtualMods(3)

NOTES

       It  is  possible for a local (client-side) keyboard description (the xkb parameter) to not contain any virtual modifier information (simply
       because the client has not requested it) while the server's corresponding definition may contain virtual modifier information.

X Version 11							   libX11 1.3.2 					   XkbVirtualModsToReal(3)