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



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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 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 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(n), tclvars(n), wish(1)

KEYWORDS
       environment, text, variables, version



Tk                                    4.1                            tkvars(n)
