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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;
{
TimeType start;
int 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;
if (tims.start < tims.steps / 2)
start = 0;
else
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 );
}
}
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