Provided by: libx11-doc_1.6.4-3_all bug


       XkbChangeEnabledControls - Manipulates the EnabledControls control


       Bool  XkbChangeEnabledControls (Display *dpy, unsigned int device_spec, unsigned int mask,
              unsigned int values);


       - dpy  connection to X server

       - device_spec
               keyboard device to modify

       - mask 1 bit -> controls to enable / disable

       - values
              1 bit => enable, 0 bit => disable


       The EnabledControls control is a bit mask where each bit  that  is  turned  on  means  the
       corresponding  control  is  enabled,  and when turned off, disabled. It corresponds to the
       enabled_ctrls field of an XkbControlsRec structure (see STRUCTURES). The  bits  describing
       which controls are turned on or off are defined in Table 1.

       Table  1  shows the actual values for the individual mask bits used to select controls for
       modification and to enable and disable the control. Note that the same mask bit is used to
       specify general modifications to the parameters used to configure the control (which), and
       to enable and disable the control (enabled_ctrls). The anomalies in the table (no "ok"  in
       column)  are  for controls that have no configurable attributes; and for controls that are
       not boolean controls and therefore cannot be enabled or disabled.

                               Table 1 Controls Mask Bits
       Mask Bit                 which or        enabled   Value
                                changed_ctrls   _ctrls
       XkbRepeatKeysMask        ok              ok        (1L<<0)
       XkbSlowKeysMask          ok              ok        (1L<<1)
       XkbBounceKeysMask        ok              ok        (1L<<2)
       XkbStickyKeysMask        ok              ok        (1L<<3)
       XkbMouseKeysMask         ok              ok        (1L<<4)
       XkbMouseKeysAccelMask    ok              ok        (1L<<5)
       XkbAccessXKeysMask       ok              ok        (1L<<6)
       XkbAccessXTimeoutMask    ok              ok        (1L<<7)
       XkbAccessXFeedbackMask   ok              ok        (1L<<8)
       XkbAudibleBellMask                       ok        (1L<<9)
       XkbOverlay1Mask                          ok        (1L<<10)
       XkbOverlay2Mask                          ok        (1L<<11)
       XkbIgnoreGroupLockMask                   ok        (1L<<12)
       XkbGroupsWrapMask        ok                        (1L<<27)
       XkbInternalModsMask      ok                        (1L<<28)
       XkbIgnoreLockModsMask    ok                        (1L<<29)
       XkbPerKeyRepeatMask      ok                        (1L<<30)
       XkbControlsEnabledMask   ok                        (1L<<31)
       XkbAccessXOptionsMask    ok              ok        (XkbStickyKeysMask |
       XkbAllBooleanCtrlsMask                   ok        (0x00001FFF)
       XkbAllControlsMask       ok                        (0xF8001FFF)

       The mask parameter specifies the boolean controls to  be  enabled  or  disabled,  and  the
       values  mask  specifies  the  new state for those controls. Valid values for both of these
       masks are composed of a bitwise inclusive OR of bits taken from the set of  mask  bits  in
       Table 1, using only those masks with "ok" in the enabled_ctrls column.

       If  the X server does not support a compatible version of Xkb or the Xkb extension has not
       been properly initialized, XkbChangeEnabledControls returns False; otherwise, it sends the
       request to the X server and returns True.

       Note  that  the  EnabledControls  control  only enables and disables controls; it does not
       configure them. Some controls, such as the  AudibleBell  control,  have  no  configuration
       attributes  and  are  therefore manipulated solely by enabling and disabling them. Others,
       however, have  additional  attributes  to  configure  their  behavior.  For  example,  the
       RepeatControl  control uses repeat_delay and repeat_interval fields to describe the timing
       behavior of keys that repeat. The RepeatControl behavior is turned on or off depending  on
       the value of the XkbRepeatKeysMask bit, but you must use other means, as described in this
       chapter, to configure its behavior in detail.


       True           The X server supports a compatible version of Xkb.

       False          The X server does not support a  compatible  version  of  Xkb  or  the  Xkb
                      extension has not been properly initialized.


       The XkbControlsRec structure is defined as follows:

           #define XkbMaxLegalKeyCode     255
           #define XkbPerKeyBitArraySize  ((XkbMaxLegalKeyCode+1)/8)

           typedef struct {
               unsigned char   mk_dflt_btn;      /∗ default button for keyboard driven mouse */
               unsigned char   num_groups;       /∗ number of keyboard groups */
               unsigned char   groups_wrap;      /∗ how to wrap out-of-bounds groups */
               XkbModsRec      internal;         /∗ defines server internal modifiers */
               XkbModsRec      ignore_lock;      /∗ modifiers to ignore when checking for grab */
               unsigned int    enabled_ctrls;    /∗ 1 bit => corresponding boolean control enabled */
               unsigned short  repeat_delay;     /∗ ms delay until first repeat */
               unsigned short  repeat_interval;  /∗ ms delay between repeats */
               unsigned short  slow_keys_delay;  /∗ ms minimum time key must be down to be ok */
               unsigned short  debounce_delay;   /∗ ms delay before key reactivated */
               unsigned short  mk_delay;         /∗ ms delay to second mouse motion event */
               unsigned short  mk_interval;      /∗ ms delay between repeat mouse events */
               unsigned short  mk_time_to_max;   /∗ # intervals until constant mouse move */
               unsigned short  mk_max_speed;     /∗ multiplier for maximum mouse speed */
               short           mk_curve;         /∗ determines mouse move curve type */
               unsigned short  ax_options;       /∗ 1 bit => Access X option enabled */
               unsigned short  ax_timeout;       /∗ seconds until Access X disabled */
               unsigned short  axt_opts_mask;    /∗ 1 bit => options to reset on Access X timeout */
               unsigned short  axt_opts_values;  /∗ 1 bit => turn option on, 0=> off */
               unsigned int    axt_ctrls_mask;   /∗ which bits in enabled_ctrls to modify */
               unsigned int    axt_ctrls_values; /∗ values for new bits in enabled_ctrls */
               unsigned char   per_key_repeat[XkbPerKeyBitArraySize];  /∗ per key auto repeat */
            } XkbControlsRec, *XkbControlsPtr;