NAME
XkbSAActionSetCtrls - Sets the ctrls0 through ctrls3 fields of act from
ctrls
SYNOPSIS
void XkbSAActionSetCtrls (XkbCtrlsAction act, unsigned int ctrls);
ARGUMENTS
- act action in which to set ctrls0-ctrls3
- ctrls
value to set in ctrls0-ctrls3
DESCRIPTION
Actions associated with the XkbCtrlsAction structure change the state
of the boolean controls.
The type field can have any one of the values shown in Table 1.
Table 1 Controls Action Types
--------------------------------------------------------------
Type Effect
--------------------------------------------------------------
XkbSA_SetControls A key press enables any boolean controls
specified in the ctrls fields that were
not already enabled at the time of the
key press. A key release disables any
controls enabled by the key press. This
action can cause XkbControlsNotify
events.
XkbSA_LockControls If the XkbSA_LockNoLock bit is not set
in the flags field, a key press enables
any controls specified in the ctrls
fields that were not already enabled at
the time of the key press.
If the XkbSA_LockNoUnlock bit is not set
in the flags field, a key release
disables any controls specified in the
ctrls fields that were not already
disabled at the time of the key press.
This action can cause XkbControlsNotify
events.
The flags field is composed of the bitwise inclusive OR of the masks
shown in Table 2.
Table 2 Control Action Flags
--------------------------------------------------------------
Flag Meaning
--------------------------------------------------------------
XkbSA_LockNoLock If set, and the action type is
XkbSA_LockControls, the server only
disables controls.
XkbSA_LockNoUnlock If set, and the action type is
XkbSA_LockControls, the server only
enables controls.
The XkbSA_SetControls action implements a key that enables a boolean
control when pressed and disables it when released. The
XkbSA_LockControls action is used to implement a key that toggles the
state of a boolean control each time it is pressed and released. The
XkbSA_LockNoLock and XkbSA_LockNoUnlock flags allow modifying the
toggling behavior to only unlock or only lock the boolean control.
The ctrls0, ctrls1, ctrls2, and ctrls3 fields represent the boolean
controls in the enabled_ctrls field of the controls structure. Xkb
macros, to convert between the two formats.
XkbSAActionSetCtrls sets the ctrls0 through ctrls3 fields of act from
ctrls.
STRUCTURES
typedef struct _XkbCtrlsAction {
unsigned char type; /∗ XkbSA_SetControls, XkbSA_LockControls */
unsigned char flags; /∗ with type, controls enabling and disabling
of controls */
unsigned char ctrls3; /∗ ctrls0 through ctrls3 represent the boolean
controls */
unsigned char ctrls2; /∗ ctrls0 through ctrls3 represent the boolean
controls */
unsigned char ctrls1; /∗ ctrls0 through ctrls3 represent the boolean
controls */
unsigned char ctrls0; /∗ ctrls0 through ctrls3 represent the boolean
controls */
} XkbCtrlsAction;