NAME

       geometry, tk_library, tk_patchLevel, tk_strictMotif, tk_version - 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 tk_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 is not set or does not 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 dot-separated sequence of decimal integers  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.

                      This value is normally the same as the result of “package require 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.  Modern
                      applications should not normally set this variable.

       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.

   INTERNAL AND DEBUGGING VARIABLES
       These variables should not normally be set by user code.

       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_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.

OTHER GLOBAL VARIABLES

       The  following  variables are only guaranteed to exist in wish executables; the Tk library
       does not define them itself but many Tk environments do.

       geometry
             If set, contains the user-supplied geometry specification to use  for  the  main  Tk
             window.

SEE ALSO

       package(3tcl), tclvars(3tcl), wish(1)

KEYWORDS

       environment, text, variables, version