NAME
itkvars - variables used by [incr Tk]
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DESCRIPTION
The following global variables are created and managed
automatically by the [incr Tk] library. Except where
noted below, these variables should normally be treated as
read-only by application-specific code and by users.
itk::library
When an interpreter is created, [incr Tk] initial
izes this variable to hold the name of a directory
containing the system library of [incr Tk] scripts.
The initial value of itk::library is set from the
ITK_LIBRARY environment variable if it exists, or
from a compiled-in value otherwise.
When [incr Tk] is added to an interpreter, it exe
cutes the script "init.itk" in this directory.
This script, in turn, looks for other script files
with the name "init.xxx". Mega-widget libraries
will be automatically initialized if they install a
script named "init.xxx" in this directory, where
"xxx" is the name of the mega-widget library. For
example, the [incr Widgets] library installs the
script "init.iwidgets" in this directory. This
script establishes the "iwidgets" namespace, and
sets up autoloading for all [incr Widgets] com
mands.
KEYWORDS
itcl, itk, variables
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