Manual Pages for UNIX Operating System command usage for man XActivateScreenSaver

XLIB FUNCTIONS                              XSetScreenSaver(3x11)



NAME
     XSetScreenSaver, XForceScreenSaver, XActivateScreenSaver,
     XResetScreenSaver, XGetScreenSaver - manipulate the screen
     saver

SYNTAX
     cc [ flag... ] file... -lX11 [ library... ]

     int XSetScreenSaver(Display *display, int timeout, int
          interval, int prefer_blanking, int allow_exposures);

     int XForceScreenSaver(Display *display, int mode);

     int XActivateScreenSaver(Display *display);

     int XResetScreenSaver(Display *display);

     int XGetScreenSaver(Display *display, int *timeout_return,
          int *interval_return, int *prefer_blanking_return, int
          *allow_exposures_return);

ARGUMENTS
     allow_exposures
               Specifies the screen save control values.  You can
               pass DontAllowExposures, AllowExposures, or
               DefaultExposures.

     allow_exposures_return
               Returns the current screen save control value
               (DontAllowExposures, AllowExposures, or DefaultEx-
               posures).

     display   Specifies the connection to the X server.

     interval  Specifies the interval, in seconds, between screen
               saver alterations.

     interval_return
               Returns the interval between screen saver invoca-
               tions.

     mode      Specifies the mode that is to be applied.  You can
               pass ScreenSaverActive or ScreenSaverReset.

     prefer_blanking
               Specifies how to enable screen blanking.  You can
               pass DontPreferBlanking, PreferBlanking, or
               DefaultBlanking.

     prefer_blanking_return
               Returns the current screen blanking preference
               (DontPreferBlanking, PreferBlanking, or



X Version 11        Last change: libX11 1.3.5                   1






XLIB FUNCTIONS                              XSetScreenSaver(3x11)



               DefaultBlanking).

     timeout   Specifies the timeout, in seconds, until the
               screen saver turns on.

     timeout_return
               Returns the timeout, in seconds, until the screen
               saver turns on.

DESCRIPTION
     Timeout and interval are specified in seconds. A timeout of
     0 disables the screen saver (but an activated screen saver
     is not deactivated), and a timeout of -1 restores the
     default.  Other negative values generate a BadValue error.
     If the timeout value is nonzero, XSetScreenSaver enables the
     screen saver.  An interval of 0 disables the random-pattern
     motion.  Both values are limited to a 16-bit signed integer
     range by the wire protocol, despite the C prototype.  If no
     input from devices (keyboard, mouse, and so on) is generated
     for the specified number of timeout seconds once the screen
     saver is enabled, the screen saver is activated.

     For each screen, if blanking is preferred and the hardware
     supports video blanking, the screen simply goes blank. Oth-
     erwise, if either exposures are allowed or the screen can be
     regenerated without sending Expose events to clients, the
     screen is tiled with the root window background tile ran-
     domly re-origined each interval seconds.  Otherwise, the
     screens' state do not change, and the screen saver is not
     activated.  The screen saver is deactivated, and all screen
     states are restored at the next keyboard or pointer input or
     at the next call to XForceScreenSaver with mode ScreenSaver-
     Reset.

     If the server-dependent screen saver method supports
     periodic change, the interval argument serves as a hint
     about how long the change period should be, and zero hints
     that no periodic change should be made.  Examples of ways to
     change the screen include scrambling the colormap periodi-
     cally, moving an icon image around the screen periodically,
     or tiling the screen with the root window background tile,
     randomly re-origined periodically.

     XSetScreenSaver can generate a BadValue error.

     If the specified mode is ScreenSaverActive and the screen
     saver currently is deactivated, XForceScreenSaver activates
     the screen saver even if the screen saver had been disabled
     with a timeout of zero.  If the specified mode is Screen-
     SaverReset and the screen saver currently is enabled, XFor-
     ceScreenSaver deactivates the screen saver if it was
     activated, and the activation timer is reset to its initial



X Version 11        Last change: libX11 1.3.5                   2






XLIB FUNCTIONS                              XSetScreenSaver(3x11)



     state (as if device input had been received).

     XForceScreenSaver can generate a BadValue error.

     The XActivateScreenSaver function activates the screen
     saver.

     The XResetScreenSaver function resets the screen saver.

     The XGetScreenSaver function gets the current screen saver
     values.

DIAGNOSTICS
     BadValue  Some numeric value falls outside the range of
               values accepted by the request.  Unless a specific
               range is specified for an argument, the full range
               defined by the argument's type is accepted.  Any
               argument defined as a set of alternatives can gen-
               erate this error.

SEE ALSO
     Xlib - C Language X Interface


ATTRIBUTES
     See attributes(5) for descriptions of the following attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | x11/library/libx11          |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | See XInitThreads(3X11)      |
    |_____________________________|_____________________________|


















X Version 11        Last change: libX11 1.3.5                   3