FILE SAVE 

	The basic function of the file save window is for user to save
a volvis file out to the system.  In order to simplify that task, the user 
will get a good idea of what he/she is saving before the actual process.  
Icons are created to represent each file.  Slice, image files have icons 
that closely represent the actual image.  The current environment file
have a standard icon representation.  The user can click on one of those
icons and some information about that file will appear in a text displaying
area.  The user may double click on the icon to save the file, or hit
enter on the file name area to save the file, or click on the accept 
button.

        In the Path Name Area, the initial path is set for saving an
image file.  All path names can be entered three different ways.  The first 
is to enter the full path name.  An example would be:

                    /home/vovlis/data/SLC

The " ~ " sign can be used just like it is used in UNIX. So the user can
also enter the above this way:

                    ~volvis/data/SLC

In case the user is working with data files in his/her own directory.  We
can simplify the path name even more.  For example, lets say the user is
volvis, then he/she could enter the above path as:

                       ~/data/SLC 

        File Name Area is a text area which allows the user to enter
the name of the file to saved.  The file name can be any valid UNIX file
name.  But the user should make sure that the file is either a slice file,
image file, or environment file with valid extensions.  When the return key 
is pressed, the file will be saved.

        The icons are displayed in the Scroll Window Area.  The icons
are created when the file type changes.  The screen is refreshed and new 
icons are displayed.  Each file  is represented by a icon ending with either 
a "slc", "img", or "env"  extension.  For slice and image files, the icons 
created are a simplified version of what the data file looks like.  The
maximum values were used to create the icon files.  The other types of files 
are given a generic image for each icon representation.

        If the user clicks on the icon once with the mouse, then some 
information about the file is displayed in a text area.  The file name in the
file name text area would be set to the current file name.  The file would
be saved if the user double clicks on the icon.

        The Header Area is a text displaying area where the 
corresponding information about that file is displayed when the user clicks
on an icon.  Information about the file will be printed in this area, such
as size, data origin, data compression, etc.  No file header will be printed
for environment file.

        The Action Area @@ 1 has three buttons in it.  The accept, close,
and help button.  If the user has entered a file name in the file name text
area, he/she could save the file by clicking the accept button instead of
hitting return in the file name text area.  If the user has clicked once on
a icon, he/she could save that file also by clicking on the accept button.
The close button is for closing the file save window.  The help button 
opens up this window. 

