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From: jrscs@uno.edu
Newsgroups: comp.lang.objective-c
Subject: sound-text synchronizing
Message-ID: <009415D9.95ACE680@uno.edu>
Date: 18 Dec 90 15:14:41 GMT
Sender: news@rex.cs.tulane.edu
Reply-To: jrscs@uno.edu
Lines: 39


   I am working on a text-to-speech conversion program on the NeXT computer
system using Interface Builder.  Everything is coming along fine except for
one problem I hope someone can help me with.  I am having difficulty
synchronizing the highlighting of a word in a window with actually saying
the word.  As of now, the relevant code looks like the following:


- readReaderFile
{
  char  aWord[ 50 ];
  int   startPos = 0 ,
        endPos;

  while ( [ self getWordBoundaries:&startPos :&endPos ] == YES )
  {
    [ [ theDocument docView ] setSel:startPos :endPos ];
    [ [ theDocument docView ] getSubstring:aWord start:startPos length:....];
    speak( aWord , endPos - startPos );
    startPos = endPos + 1;
  }

  return self;
}

*** NOTE : The text is contained in a ScrollView's docView, hence the
           "[ theDocument docView ]" calls.

For a short file, what happens is all of the words are spoken first and then
the selections are executed.  If I put the "[ .... setSel .... ]" line in a
loop to execute about ten times, then two words are spoken and one is high-
lighted, two are spoken and one is highlighted, ....  There must be a way
around this problem.  I think a solution might entail using delegates and the
methods "willPlay" and "didPlay" for the sound object which stores the sound
data for the words in the window, but I just can't seem to hook things
together.  Can someone please give me an idea on how I can solve this problem.

Thanks,
John Stelly