NAME

       Tk::tkvars - Variables used or set by Tk

DESCRIPTION

       The following perl variables are either set or used by Tk at various times in its execution. (For a list
       of variables used by perl see perlvar.)

       $Tk::library
           This variable holds the file name for a directory containing the modules related to Tk.  These
           modules 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 searching
           for a directory named Tk in the directory where the file Tk.pm, or the first directory Tk in @INC.

           The TK_LIBRARY environment variable used by Tcl/Tk is not supported by perl/Tk.  Please use @INC to
           change where modules are searched.

           Note: This is Tcl remnant. With perl it makes more sense to use @INC and %INC).

       $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.

           Note: this is Tcl remnant. With perl it makes more sense to use $Tk::VERSION described below.

       $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::VERSION
           The variable holds the current version number of the perl/Tk release in the form major.minor.  Major
           and minor are integers.

           The major version number shows on which Tcl/Tk release perl/Tk is based.  E.g., 402 means based on
           Tcls Tk 4.2.  (Patchlevel of Tcls Tk are not incorporated because perl/Tk tended  to be ``ahead'' of
           them on some fixes and behind on others.  The first digest of the major version number increases in
           any Tk release that includes changes that are not backward compatible (i.e. whenever existing perl/Tk
           applications and scripts may have to change to work with the new release).

           The minor version depends on perl/Tk only. It uses the 'even'='stable', 'odd'='experimental' scheme
           that linux uses:

            .0xx  - inherently 'alpha'
            .1xx  - experimental 'beta'
            .2xx  - stable
            .3xx  - experimental
            .4xx  - stable
            ...

           The minor version number increases with each new release of Tk, except that it resets to zero
           whenever the major version number changes.

       $Tk::version
           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.

           Note: this is Tcl remnant.  With perl it makes more sense to use $Tk::VERSION described above.

KEYWORDS

       variables, version