See the file man.macros.
itkvars - variables used by [incr Tk]
The following global variables are created and managed automatically by the
library. Except where noted below, these variables
should normally be treated as read-only by application-specific code and by
- When an interpreter is created, [incr Tk] initializes 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 executes 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] commands.
itcl, itk, variables