Conference bulova::decw_jan-89_to_nov-90

2086.0. "DECW appl. & blind users" by TOWNS::WURZBERGER (Ron Wurzberger) Fri Jan 19 1990 12:40

    I have a customer that has a DECwindows application that needs to be
    modified for use by blind users; obviously, use of the mouse is
    inappropriate.  The application currently uses the standard mainloop
    routine.  The customer would like to provide some text input area,
    either a command field or a DECterm window, so the blind user can enter
    commands that would cause the application to operate as it would for a
    sighted user.  The application would run continuously throughout the
    day although any number of users may use it during the day.  When the
    blind user uses the application, the displays must be updated to
    reflect any changes the user has made so that when the next sighted
    user sits down to use it the screen is valid - meaning scale and scroll
    pointer values, text regions, and graphics displays must be updated to
    reflect current values in the application even though the DECwindows
    interface was not used to change them.  If the customer uses a DECterm
    window for input, no callback will be available to update the displays. 
    How can the application make visible those changes made via setargs,
    setvalues, and other means from the mainline program as opposed to a
    callback routine?
    
    thanks,
    Ron