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




NAME

       geometry, tk_library, tk_patchLevel, tk_strictMotif, tk_version - Vari-
       ables 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 file name for a directory con-
                      taining 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  sev-
                      eral  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

       tk_strictMotif This variable is set to zero by default.  If an applica-
                      tion  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 scroll-
                      bar sliders will  not  change  color  when  the  pointer
                      passes  over  them.  Modern applications should not nor-
                      mally set this variable.

       tk_version     Tk sets this variable in the interpreter for each appli-
                      cation.   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 applica-
                      tions 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 informa-
              tion 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 executa-
       bles; the Tk library does not define them itself but many  Tk  environ-
       ments 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)

tk 8.6.0 - Generated Mon Jan 21 15:07:31 CST 2013
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