XChangeKeyboardMapping(display, first_keycode, keysyms_per_keycode, keysyms,
num_codes)
Display *display;
int first_keycode;
int keysyms_per_keycode;
KeySym *keysyms;
int num_codes;
KeySym *XGetKeyboardMapping(display, first_keycode, keycode_count,
keysyms_per_keycode_return)
Display *display;
KeyCode first_keycode;
int keycode_count;
int *keysyms_per_keycode_return;
XDisplayKeycodes(display, min_keycodes_return, max_keycodes_return)
Display *display;
int *min_keycodes_return, *max_keycodes_return;
int XSetModifierMapping(display, modmap)
Display *display;
XModifierKeymap *modmap;
XModifierKeymap *XGetModifierMapping(display)
Display *display;
XModifierKeymap *XNewModifiermap(max_keys_per_mod)
int max_keys_per_mod;
XModifierKeymap *XInsertModifiermapEntry(modmap, keycode_entry, modifier)
XModifierKeymap *modmap;
KeyCode keycode_entry;
int modifier;
XModifierKeymap *XDeleteModifiermapEntry(modmap, keycode_entry, modifier)
XModifierKeymap *modmap;
KeyCode keycode_entry;
int modifier;
XFreeModifiermap(modmap)
XModifierKeymap *modmap;
num_codes * keysyms_per_keycodeThe 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 - 1KeySym number N, counting from zero, for KeyCode K has the following index in keysyms, counting from zero:
(K - first_keycode) * keysyms_per_keycode + NThe specified keysyms_per_keycode can be chosen arbitrarily by the client to be large enough to hold all desired symbols. 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 generates a MappingNotify event.
There is no requirement that the X server interpret this mapping. It is merely stored for reading and writing by clients.
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 expression must be less than or equal to max_keycode as returned by XDisplayKeycodes:
first_keycode + keycode_count - 1If this is not the case, a ``BadValue'' error results. The number of elements in the KeySyms list is:
keycode_count * keysyms_per_keycode_returnKeySym 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 + NThe 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 XGetKeyboardMapping, 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 contains 8 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
in the Display structure, 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 hardware, if auto-repeat cannot be disabled on certain keys, or if multiple modifier keys are not supported. 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, XSetModifierMapping 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 disabled.
The XNewModifiermap function returns a pointer to XModifierKeymap structure for later use.
The XInsertModifiermapEntry function adds the specified KeyCode 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 XModifierKeymap structure.
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;