XkbActionSetCtrls - Man Page
Sets the ctrls0 through ctrls3 fields of act from ctrls
Synopsis
void XkbActionSetCtrls (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.
XkbActionSetCtrls 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;