MirOS Manual: XChangeKeyboardMapping(3), XDeleteModifiermapEntry(3), XDisplayKeycodes(3), XFreeModifierMap(3), XGetKeyboardMapping(3), XGetModifierMapping(3), XInsertModifiermapEntry(3), XModifierKeymap(3), XNewModifiermap(3), XSetModifierMapping(3)


XChangeKeyboardMapping(3X1XLIB FUNCTIXChangeKeyboardMapping(3X11)

NAME

     XChangeKeyboardMapping, XGetKeyboardMapping, XDisplayKey-
     codes, XSetModifierMapping, XGetModifierMapping, XNewModifi-
     ermap, XInsertModifiermapEntry, XDeleteModifiermapEntry,
     XFreeModifierMap XModifierKeymap - manipulate keyboard
     encoding and keyboard encoding structure

SYNTAX

     int XChangeKeyboardMapping(Display *display, int
          first_keycode, int keysyms_per_keycode, KeySym
          *keysyms, int num_codes);

     KeySym *XGetKeyboardMapping(Display *display, KeyCode
          first_keycode, int keycode_count, int
          *keysyms_per_keycode_return);

     int XDisplayKeycodes(Display *display, int
          *min_keycodes_return, int *max_keycodes_return);

     int XSetModifierMapping(Display *display, XModifierKeymap
          *modmap);

     XModifierKeymap *XGetModifierMapping(Display *display);

     XModifierKeymap *XNewModifiermap(int max_keys_per_mod);

     XModifierKeymap *XInsertModifiermapEntry(XModifierKeymap
          *modmap, KeyCode keycode_entry, int modifier);

     XModifierKeymap *XDeleteModifiermapEntry(XModifierKeymap
          *modmap, KeyCode keycode_entry, int modifier);

     int XFreeModifiermap(XModifierKeymap *modmap);

ARGUMENTS

     display   Specifies the connection to the X server.

     first_keycode
               Specifies the first KeyCode that is to be changed
               or returned.

     keycode_count
               Specifies the number of KeyCodes that are to be
               returned.

     keycode_entry
               Specifies the KeyCode.

     keysyms   Specifies an array of KeySyms.

     keysyms_per_keycode
               Specifies the number of KeySyms per KeyCode.

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XChangeKeyboardMapping(3X1XLIB FUNCTIXChangeKeyboardMapping(3X11)

     keysyms_per_keycode_return
               Returns the number of KeySyms per KeyCode.

     max_keys_per_mod
               Specifies the number of KeyCode entries preallo-
               cated to the modifiers in the map.

     max_keycodes_return
               Returns the maximum number of KeyCodes.

     min_keycodes_return
               Returns the minimum number of KeyCodes.

     modifier  Specifies the modifier.

     modmap    Specifies the XModifierKeymap structure.

     num_codes Specifies the number of KeyCodes that are to be
               changed.

DESCRIPTION

     The XChangeKeyboardMapping function defines the symbols for
     the specified number of KeyCodes starting with
     first_keycode. The symbols for KeyCodes outside this range
     remain unchanged. The number of elements in keysyms must be:

     num_codes * keysyms_per_keycode

     The specified first_keycode must be greater than or equal to
     min_keycode returned by XDisplayKeycodes, or a BadValue
     error results. In addition, the following expression must be
     less than or equal to max_keycode as returned by
     XDisplayKeycodes, or a BadValue error results:

     first_keycode + num_codes - 1

     KeySym number N, counting from zero, for KeyCode K has the
     following index in keysyms, counting from zero:

     (K - first_keycode) * keysyms_per_keycode + N

     The specified keysyms_per_keycode can be chosen arbitrarily
     by the client to be large enough to hold all desired sym-
     bols. A special KeySym value of NoSymbol should be used to
     fill in unused elements for individual KeyCodes. It is legal
     for NoSymbol to appear in nontrailing positions of the
     effective list for a KeyCode. XChangeKeyboardMapping gen-
     erates a MappingNotify event.

     There is no requirement that the X server interpret this
     mapping. It is merely stored for reading and writing by
     clients.

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XChangeKeyboardMapping(3X1XLIB FUNCTIXChangeKeyboardMapping(3X11)

     XChangeKeyboardMapping can generate BadAlloc and BadValue
     errors.

     The XGetKeyboardMapping function returns the symbols for the
     specified number of KeyCodes starting with first_keycode.
     The value specified in first_keycode must be greater than or
     equal to min_keycode as returned by XDisplayKeycodes, or a
     BadValue error results. In addition, the following expres-
     sion must be less than or equal to max_keycode as returned
     by XDisplayKeycodes:

     first_keycode + keycode_count - 1

     If this is not the case, a BadValue error results. The
     number of elements in the KeySyms list is:

     keycode_count * keysyms_per_keycode_return

     KeySym number N, counting from zero, for KeyCode K has the
     following index in the list, counting from zero:
     (K - first_code) * keysyms_per_code_return + N

     The X server arbitrarily chooses the
     keysyms_per_keycode_return value to be large enough to
     report all requested symbols. A special KeySym value of
     NoSymbol is used to fill in unused elements for individual
     KeyCodes. To free the storage returned by XGetKeyboardMap-
     ping, use XFree.

     XGetKeyboardMapping can generate a BadValue error.

     The XDisplayKeycodes function returns the min-keycodes and
     max-keycodes supported by the specified display. The minimum
     number of KeyCodes returned is never less than 8, and the
     maximum number of KeyCodes returned is never greater than
     255. Not all KeyCodes in this range are required to have
     corresponding keys.

     The XSetModifierMapping function specifies the KeyCodes of
     the keys (if any) that are to be used as modifiers. If it
     succeeds, the X server generates a MappingNotify event, and
     XSetModifierMapping returns MappingSuccess. X permits at
     most 8 modifier keys. If more than 8 are specified in the
     XModifierKeymap structure, a BadLength error results.

     The modifiermap member of the XModifierKeymap structure con-
     tains 8 sets of max_keypermod KeyCodes, one for each modif-
     ier 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 in the Display structure, or a

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XChangeKeyboardMapping(3X1XLIB FUNCTIXChangeKeyboardMapping(3X11)

     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 hardware, if auto-repeat cannot be disabled
     on certain keys, or if multiple modifier keys are not sup-
     ported. If some such restriction is violated, 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, XSetModi-
     fierMapping returns MappingBusy, and none of the modifiers
     is changed.

     XSetModifierMapping can generate BadAlloc and BadValue
     errors.

     The XGetModifierMapping function 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 XFreeModifiermap. If only zero values
     appear in the set for any modifier, that modifier is dis-
     abled.

     The XNewModifiermap function returns a pointer to XModifi-
     erKeymap structure for later use.

     The XInsertModifiermapEntry function adds the specified Key-
     Code to the set that controls the specified modifier and
     returns the resulting XModifierKeymap structure (expanded as
     needed).

     The XDeleteModifiermapEntry function deletes the specified
     KeyCode from the set that controls the specified modifier
     and returns a pointer to the resulting XModifierKeymap
     structure.

     The XFreeModifiermap function frees the specified XModifi-
     erKeymap structure.

STRUCTURES

     The XModifierKeymap structure contains:

     typedef struct {
          int max_keypermod;  /* This server's max number of keys per modifier */
          KeyCode *modifiermap;/* An 8 by max_keypermod array of the modifiers */
     } XModifierKeymap;

DIAGNOSTICS

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

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XChangeKeyboardMapping(3X1XLIB FUNCTIXChangeKeyboardMapping(3X11)

     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 gen-
               erate this error.

SEE ALSO

     XFree(3X11), XSetPointerMapping(3X11)
     Xlib - C Language X Interface

XFree86                   Version 4.5.0                         5

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