tkvars(n) Tk Built-In Commands tkvars(n)
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NAME
tkvars - Variables used or set by Tk
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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 containing a library of Tcl scripts
related to Tk. These scripts include an initialization file that is normally pro-cessed processed
cessed 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 isn't set or doesn't 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.
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 ver-sion version
sion of Tk.
tk::Priv 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.
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 exam-ple, example,
ple, active elements such as buttons and scrollbar sliders will not change color when
the pointer passes over them.
tk_textRedraw
tk_textRelayout
These variables are set by text widgets when they have debugging turned on. The val-ues values
ues written to these variables can be used to test or debug text widget operations.
These variables are mostly used by Tk's test suite.
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, text
Tk 4.1 tkvars(n)
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