DMXChangeDesktopAttributes(3)

NAME

   DMXChangeDesktopAttributes - change global bounding box

SYNOPSIS

   #include <X11/extensions/dmxext.h>

   int DMXChangeDesktopAttributes(Display *dpy,
                                  unsigned int mask,
                                  DMXDesktopAttributes *attr);

DESCRIPTION

   DMXChangeDesktopAttributes()  resizes  the  bounding  box  of the whole
   screen when using the Xinerama extension.  Otherwise, it has no  effect
   on  the  screen  layout.   An  attribute mask is placed in mask and the
   attributes to change are placed in attr.

   The values that are used to compute mask are as follows:

   DMXDesktopWidth
   DMXDesktopHeight
   DMXDesktopShiftX
   DMXDesktopShiftY

   The DMXDesktopAttributes structure is:

   typedef struct {
       unsigned int width;
       unsigned int height;
       int          shiftX;
       int          shiftY;
   } DMXDesktopAttributes;

   width  and  height specify the new width and height  for  the  bounding
   box.   shiftX   and   shiftY  specify where the Xinerama origin will be
   placed with respect to the origin of the new bounding box.  This allows
   the  left  and  upper  edges  of the bounding box to be changed without
   changing the visual position of the windows on the desktop.   If  width
   or   height  is  not  specified,  the  current values will be used.  If
   shiftX  or  shiftY is not specified, 0 will be used.

   All coordinates are in the global DMX coordinate system.   If  Xinerama
   is not active, an error will be generated.

RETURN VALUE

   DMXChangeDesktopAttributes()  will  return 0 on success, DmxBadXinerama
   if Xinerama is not active, DmxBadValue if the size of the bounding  box
   is too large, and DmxBadReply if there was a protocol error.

   DMXChangeDesktopAttributes()  can generate BadLength (if the request is
   malformed,  which  should  never  happen  when   using   this   library
   interface), and BadValue (if any values are out of range).

SEE ALSO

   DMXGetDesktopAttributes(3), DMX(3), Xdmx(1)

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