Scroll to navigation

tkvars(3tk) Tk Built-In Commands tkvars(3tk) 





NAME


geometry, tk_library, tk_patchLevel, tk_strictMotif, tk_version -
    Variables used or set by Tk








DESCRIPTION


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



  

  
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.





  

  
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”.





  

  
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 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.



  

  
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.

  

  

  

  
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.



  

  
If set, contains the user-supplied geometry specification to use for the
      main Tk window.








SEE ALSO


package(3tcl), tclvars(3tcl), wish(1)






KEYWORDS


environment, text, variables, version







  

    4.1
    Tk