Provided by: libx11-doc_1.6.2-1ubuntu2.1_all 
NAME
XkbChangeEnabledControls - Manipulates the EnabledControls control
SYNOPSIS
Bool XkbChangeEnabledControls (Display *dpy, unsigned int device_spec, unsigned int mask,
unsigned int values);
ARGUMENTS
- 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
DESCRIPTION
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 |
XkbAccessXFeedbackMask)
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.
RETURN VALUES
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.
STRUCTURES
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;