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From: dcheslow@cs.tamu.edu (David A Cheslow)
Newsgroups: comp.sys.next
Subject: a useful piece of code
Message-ID: <17735@helios.TAMU.EDU>
Date: 24 Jun 91 16:27:15 GMT
Sender: usenet@helios.TAMU.EDU
Organization: Computer Science Department, Texas A&M University
Lines: 19

Here is a snipet of OC code that ask_next@next.com sent to me.  its purpose is to select a number of cells in a matrix from within code (much like you could do with the mouse using <shift><click>).  this particlular piece of code selects even numbered rows and deselects odd numbered rows, but should be eisily modified for other patterns or conditions


    int rows;


     [matrix getNumRows:&rows numCols:NULL] ;
     [matrix lockFocus] ;
     while (rows--) 
     {
        NXRect rect;
        BOOL even =( rows % 2) == 0;
        id cell =  [matrix cellAt:rows:0] ;
        [matrix getCellFrame:&rect at:rows :0] ;
        [cell setState:(even ? 1 : 0)] ;
        [cell highlight:&rect inView:matrix lit:even] ;
     }
     [matrix unlockFocus] ;
     [[matrix window]  flushWindow] ;