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tkvars(n)                                   Tk Built-In Commands                                   tkvars(n)



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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  pro-cessed processed
                      cessed  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 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 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 ver-sion version
                      sion 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 exam-ple, example,
                      ple, 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 val-ues values
                      ues 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(n)