1tkvars(n)                    Tk Built-In Commands                    tkvars(n)
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NAME

8       geometry, tk_library, tk_patchLevel, tk_strictMotif, tk_version - Vari‐
9       ables used or set by Tk
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DESCRIPTION

13       The following Tcl variables are either set or used  by  Tk  at  various
14       times in its execution:
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16       tk_library     This  variable  holds the file name for a directory con‐
17                      taining a library of Tcl scripts related to  Tk.   These
18                      scripts  include an initialization file that is normally
19                      processed whenever a  Tk  application  starts  up,  plus
20                      other files containing procedures that implement default
21                      behaviors for widgets.
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23                      The initial value of tk_library is set when Tk is  added
24                      to  an  interpreter;   this is done by searching several
25                      different directories until one is found  that  contains
26                      an appropriate Tk startup script.  If the TK_LIBRARY en‐
27                      vironment variable exists, then the directory  it  names
28                      is  checked first.  If TK_LIBRARY is not set or does not
29                      refer to an appropriate directory, then Tk  checks  sev‐
30                      eral  other  directories  based on a compiled-in default
31                      location, the location of the Tcl library directory, the
32                      location  of  the binary containing the application, and
33                      the current working directory.
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35                      The variable can be modified by an application to switch
36                      to a different library.
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38       tk_patchLevel  Contains  a  dot-separated  sequence of decimal integers
39                      giving the current patch level for Tk.  The patch  level
40                      is  incremented  for  each  new release or patch, and it
41                      uniquely identifies an official version of Tk.
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43                      This value is normally the same as the result of  “pack‐
44                      age require Tk”.
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46       tk_strictMotif This variable is set to zero by default.  If an applica‐
47                      tion sets it to one,  then  Tk  attempts  to  adhere  as
48                      closely  as  possible  to Motif look-and-feel standards.
49                      For example, active elements such as buttons and scroll‐
50                      bar  sliders  will  not  change  color  when the pointer
51                      passes over them.  Modern applications should  not  nor‐
52                      mally set this variable.
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54       tk_version     Tk sets this variable in the interpreter for each appli‐
55                      cation.  The variable holds the current  version  number
56                      of  the  Tk  library in the form major.minor.  Major and
57                      minor are integers.  The major version number  increases
58                      in  any  Tk  release  that includes changes that are not
59                      backward compatible (i.e. whenever existing Tk  applica‐
60                      tions  and  scripts  may have to change to work with the
61                      new release).  The minor version number  increases  with
62                      each  new  release  of Tk, except that it resets to zero
63                      whenever the major version number changes.
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65   INTERNAL AND DEBUGGING VARIABLES
66       These variables should not normally be set by user code.
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68       tk::Priv
69              This variable is an array containing several pieces of  informa‐
70              tion  that are private to Tk.  The elements of tk::Priv are used
71              by Tk library procedures and default bindings.  They should  not
72              be accessed by any code outside Tk.
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74       tk_textRedraw
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76       tk_textRelayout
77              These variables are set by text widgets when they have debugging
78              turned on.  The values written to these variables can be used to
79              test  or  debug  text  widget  operations.   These variables are
80              mostly used by Tk's test suite.
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OTHER GLOBAL VARIABLES

83       The following variables are only guaranteed to exist in  wish  executa‐
84       bles;  the  Tk library does not define them itself but many Tk environ‐
85       ments do.
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87       geometry
88             If set, contains the user-supplied geometry specification to  use
89             for the main Tk window.
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SEE ALSO

92       package(n), tclvars(n), wish(1)
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KEYWORDS

95       environment, text, variables, version
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99Tk                                    4.1                            tkvars(n)
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