**CIGAL Reference Manual, Chapter 4 (cursor): **
===== Cursor -- Integer variable controlling cursor options =====
**usage:  cursor = value**

CURSOR is an internally defined integer variable controlling options related
to how the cursor is moved and displayed.  The value of the CURSOR parameter
can be changed at any time and remains set until it is explicitly modified again.

The low 3 bits of the CURSOR flag specify which pointing devices are present.
Currently CIGAL recognizes a Microsoft type "mouse" and/or a digitizing tablet.
(For details on how to configure your digitizing tablet see [TABLETS][1] or [TABLET][4].)
In addition to the cursor pointers specified in the CURSOR flag, the cursor can also
be moved at any time by using the arrow keys on the terminal keyboard (see [KEYBOARD][1]).
You can specify as many different pointers as your hardware supports.  CIGAL continuously
poll each pointer and automatically use whichever is being moved at the time.
The higher-order bits in the CURSOR flag specify how the coordinates returned by
the cursor pointer are transformed and displayed.
The meanings of the CURSOR settings are summarized below.

  Combine levels by adding values (values shown are octal):
      Value
        1   MOUSE_OUT   Use mouse cursor display
        2   MOUSE_IN    A mouse is available for input
        4   TABLET      A digitizing tablet is present
  
       10o  IPROC       Show cursor on image processor display
       20o  TERM        Draw cursor on terminal display (if no mouse)
       40o  NOCLIP      Don't restrict cursor to cursor window
      100o  NOCURSOR    Don't display any cursor
      200o  NODRAWOFF   Don't turn cursor display off while drawing vectors
      400o  MAP_INPUT   Map cursor window (^^5) values to fill data window (^^6)
     1000o  MAP_OUTPUT  Map data window values (^^6) to fill display window (^^2)
     2000o  NOMODE_SET  Don't change cursor windows when changing video mode
                          (ignored if MOUSE_IN flag is not set)
     4000o  HORIZ_LINE  Draw horizontal line cursor
    10000o  VERT_LINE   Draw vertical line cursor (Note: Crosshair is 14000o)
    20000o  BOX         Draw box cursor
    40000o  RUBBERBAND  Draw "rubberband" cursor
   100000o  CURSOR_ON   Cursor is currently being displayed (this bit will
                          normally never appear set -- don't change this)
  
NOTE: When CIGAL starts up it automatically tests to see whether a "mouse"
is present; if it is then CURSOR is set to 3.  If you have a mouse, then
the cursor windows (^^2 and ^^5) will normally be changed automatically
when you change video modes, in order to adjust to changes in the mouse
coordinates associated with different video modes.  This can be suppressed
by setting the NOMODE_SET flag.

See [[jvs:cigal:manual:chapter1:windows|WINDOWS(1)]] for more information on the cursor, data, and display
   "windows".

**See Also:**\\
[[jvs:cigal:manual:chapter1:keyboard|KEYBOARD(1)]], 
[[jvs:cigal:manual:chapter4:tablet|TABLET(4)]], 
[[jvs:cigal:manual:chapter1:tablets|TABLETS(1)]], 
[[jvs:cigal:manual:chapter1:windows|WINDOWS(1)]]

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