It is possible to customize many aspects of the Lens graphical displays
by placing a .lensrc file in your home directory or changing the
"Src/lensrc.tcl" file if you have a
personal version of Lens. Parameters that can be changed affect
standard fonts, colors, which panels appear in the Main Window, how the
Main Window is redrawn when a panel is popped in or out, which
parameters appear in the Main Window, the default filters and
directories for the file viewers, whether the manual is always spawned
in a new browser window, your
auto_load path to commonly
used procedures, and any aliases or other commands that you may want to
When Lens boots up, it will source the standard configuration file, "Src/lensrc.tcl". It will then source the .lensrc file in your home directory. The .lensrc file is simply a Tcl script file. You may use the .lensrc file to override most definitions in the standard file. Therefore, you may place any procedures or aliases you would like in the file, or use the .lensrc to source other files containing these definitions. If you wish to make major changes, you may wish to edit a private copy of the lensrc.tcl but that should not be necessary.
To customize your version, you could either copy the lensrc.tcl to your .lensrc and then edit it or just copy those parts you wish to change. The effect will be the same. As with any Tcl script, lines beginning with a hash mark in the .lensrc are comments. The following are some things you may want to customize.
The standard fonts are designed to look pretty good on both high and low resolution displays, but they may be a bit big in low resolution.
.mainColor sets the application-wide color "scheme".
It will affect many different things. If you aren't into light gray,
change this first and then, if you like, go mucking with all the other
Or, if you'd just like a hint of color, change the
.borderColor. May I recommend a sunny pastel? "light
blue" or pink are charming, but are not to be used after Labor Day.
.registerParameter is used to specify which parameters will
be accessible on the Main Window. If the first argument is "Algorithm",
the parameter will appear on the Algorithm Panel. If it is "Training",
the parameter will appear on the Training Panel. The second argument is
the object path of the parameter and the third is its name. The fourth
is a procedure used to prevent the user from entering bad values for the
parameter. These procedures, which all begin with
are defined in interface.tcl. The last two values will be the
limit and int arguments to the enforcing procedure.
The next set of commands determine which panels will appear by default on the Main Window.
Try popping some panels out of the Main Window using the checkbuttons in
Window/Panels... pulldown menu. If it doesn't shrink
properly, uncomment the two lines in the
procedure. Either that or get a better window manager.
If you don't use standard file extensions, you will want to change the filters used in the file browsers. A filter is a series of glob-style patterns. If any of the patterns match, the file name will be displayed.
.spawnNewManualWindow determines whether a new browser
window will always be created when you run manual or whether an existing window
will be taken over, which is the default. This only affects Netscape.
auto_path is the directory path that Lens uses to find
procedures during autoloading. You may wish to create a directory with
a set of common procedures and put this on your auto path. There is no
need to source the scripts in this directory as they will be sourced on
demand, assuming index has been called
tcl_precision is the decimal precision Tcl uses
when converting from a float (which is always a double for Tcl) to a
string. This will only affect calculations performed in the shell with
not the internal Lens calculations.
are run when Lens receives a USR1 or USR2 signal, respectively. These
signals can be sent using the
kill program. These can be
used to force a network running in batch mode to perform a certain
action while it is busy, like saving the current set of weights.
Finally, a number of procedures such as .initNetwork and .initGroup are defined in the lensrc.tcl file. These will be called whenever a structure of the corresponding type is created (and after the extensions are added to that structure), allowing you to set your own default values for fields in that structure, or to do whatever else you can think of.