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- /*
- * *********************************************************************
- * * Copyright (C) 1988, 1990 Stanford University. *
- * * Permission to use, copy, modify, and distribute this *
- * * software and its documentation for any purpose and without *
- * * fee is hereby granted, provided that the above copyright *
- * * notice appear in all copies. Stanford University *
- * * makes no representations about the suitability of this *
- * * software for any purpose. It is provided "as is" without *
- * * express or implied warranty. Export of this software outside *
- * * of the United States of America may require an export license. *
- * *********************************************************************
- */
-
- #include "ana.h"
- #include "ana_glob.h"
-
-
- public void Zoom( what )
- char *what;
- {
- int start, steps;
-
- switch( *what )
- {
- case 'i' : /* zoom in */
- steps = tims.steps / 2;
- if( steps < 10 )
- steps = 10;
- start = tims.start + steps / 2;
- if( start > tims.last )
- {
- start = tims.last - steps / 2;
- if( start < tims.first )
- start = tims.first;
- }
- break;
-
- case 'o' : /* zoom out */
- steps = tims.steps * 2;
- start = tims.start - tims.steps / 2;
- if( start < tims.first )
- start = tims.first;
- if( steps > max_time or (start + steps) > max_time )
- return;
- break;
- }
-
- if( tims.steps != steps )
- {
- tims.start = start;
- tims.steps = steps;
- tims.end = start + steps;
- RedrawTimes();
- UpdateScrollBar();
- DrawTraces( start, tims.end );
- }
- }
-