NAME

       tkvars - Variables used or set by Tk
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DESCRIPTION

       The following Tcl variables are either set or used by Tk at various times in its execution:

       tk_library     This  variable  holds  the  file  name for a directory containing a library of Tcl scripts
                      related to Tk.  These scripts include an initialization file that  is  normally  processed
                      whenever a Tk application starts up, plus other files containing procedures that implement
                      default  behaviors  for widgets.  The initial value of tcl_library is set when Tk is added
                      to an interpreter;  this is done by searching several different directories until  one  is
                      found  that  contains  an  appropriate  Tk  startup script.  If the TK_LIBRARY environment
                      variable exists, then the directory it names is checked first.  If TK_LIBRARY isn't set or
                      doesn't refer to an appropriate directory, then Tk checks several other directories  based
                      on a compiled-in default location, the location of the Tcl library directory, the location
                      of the binary containing the application, and the current working directory.  The variable
                      can be modified by an application to switch to a different library.

       tk_patchLevel  Contains  a  decimal  integer  giving  the current patch level for Tk.  The patch level is
                      incremented for each new release or patch, and it uniquely identifies an official  version
                      of Tk.

       tk::Priv       This variable is an array containing several pieces of information that are private to Tk.
                      The  elements  of  tk::Priv  are used by Tk library procedures and default bindings.  They
                      should not be accessed by any code outside Tk.

       tk_strictMotif This variable is set to zero by default.  If an  application  sets  it  to  one,  then  Tk
                      attempts  to adhere as closely as possible to Motif look-and-feel standards.  For example,
                      active elements such as buttons and scrollbar sliders  will  not  change  color  when  the
                      pointer passes over them.

       tk_textRedraw

       tk_textRelayout
                      These  variables  are  set by text widgets when they have debugging turned on.  The values
                      written to these variables can be used to test or debug  text  widget  operations.   These
                      variables are mostly used by Tk's test suite.

       tk_version     Tk  sets  this  variable  in the interpreter for each application.  The variable holds the
                      current version number of the Tk library in the form major.minor.   Major  and  minor  are
                      integers.  The major version number increases in any Tk release that includes changes that
                      are  not  backward compatible (i.e. whenever existing Tk applications and scripts may have
                      to change to work with the new release).  The minor version number increases with each new
                      release of Tk, except that it resets to zero whenever the major version number changes.

KEYWORDS

       variables, version, text

Tk                                                     4.1                                           tkvars(3tk)