Manual Pages for UNIX Operating System command usage for man Tk_FreeColormap

Tk Library Procedures                         Tk_GetColormap(3TK)



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NAME
     Tk_GetColormap, Tk_FreeColormap - allocate and  free  color-
     maps

SYNOPSIS
     #include 

     Colormap
     Tk_GetColormap(interp, tkwin, string)

     Tk_FreeColormap(display, colormap)

ARGUMENTS
     Tcl_Interp *interp    (in)      Interpreter to use for error
                                     reporting.

     Tk_Window  tkwin      (in)      Token for  window  in  which
                                     colormap will be used.

     CONST char *string    (in)      Selects a colormap:   either
                                     new  or the name of a window
                                     with  the  same  screen  and
                                     visual as tkwin.

     Display    *display   (in)      Display for  which  colormap
                                     was allocated.

     Colormap   colormap   (in)      Colormap to free;  must have
                                     been  returned by a previous
                                     call  to  Tk_GetColormap  or
                                     Tk_GetVisual.
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DESCRIPTION
     These   procedures   are   used   to    manage    colormaps.
     Tk_GetColormap returns a colormap suitable for use in tkwin.
     If its string  argument  is  new  then  a  new  colormap  is
     created;   otherwise string must be the name of another win-
     dow with the same screen and visual as tkwin, and the color-
     map  from  that  window is returned.  If string doesn't make
     sense, or if it refers to a window  on  a  different  screen
     from  tkwin  or  with  a  different  visual than tkwin, then
     Tk_GetColormap returns None and leaves an error  message  in
     interp->result.

     Tk_FreeColormap should be called when a colormap returned by
     Tk_GetColormap  is  no longer needed.  Tk maintains a refer-
     ence count for each colormap returned by Tk_GetColormap,  so
     there  should  eventually be one call to Tk_FreeColormap for



Tk                      Last change: 4.0                        1






Tk Library Procedures                         Tk_GetColormap(3TK)



     each call to Tk_GetColormap.  When  a  colormap's  reference
     count becomes zero, Tk releases the X colormap.

     Tk_GetVisual and Tk_GetColormap work together, in that a new
     colormap  created  by  Tk_GetVisual may later be returned by
     Tk_GetColormap.  The reference counting mechanism for color-
     maps  includes  both  procedures, so callers of Tk_GetVisual
     must also call Tk_FreeColormap to release the colormap.   If
     Tk_GetColormap is called with a string value of new then the
     resulting colormap will never be returned  by  Tk_GetVisual;
     however,  it  can  be  used  in  other  windows  by  calling
     Tk_GetColormap with the original window's name as string.


KEYWORDS
     colormap

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

     _______________________________________
    |   ATTRIBUTE TYPE   |  ATTRIBUTE VALUE|
    |____________________|__________________|_
    | Availability       |  runtime/tk-8   |
    |____________________|__________________|_
    | Interface Stability|  Uncommitted    |
    |____________________|_________________|

NOTES
     Source for Tk is available on http://opensolaris.org.
























Tk                      Last change: 4.0                        2