tkvars(3Tk)

NAME
     tkvars - Variables used or set by Tk


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

     tk_library     This variable holds the name of 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.  If the variable isn't already set when a Tk     |
                    application is created, Tk sets it from the TK_LIBRARY    |
                    environment variable, if one exists, or else from a       |
                    default value compiled into Tk.  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.

     tkPriv         This variable is an array containing several pieces of    |
                    information that are private to Tk.  The elements of      |
                    tkPriv 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_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