/* IntMonitor.java

   Track and display time.
   
   Rich Acuff <Rich@Dr-Amy.com>
   28-Sep-97
 */

import java.awt.*;

public class TimeMonitor extends Monitor {

    long startTime, endTime;
    Label lab;

    public TimeMonitor (Label l) {
        lab = l;
    }

    public void start () {
        endTime = 0; //means "running"
        startTime = System.currentTimeMillis();
    }

    public void stop () {
        endTime = System.currentTimeMillis();
    }
    
    public void pause () {
        endTime = System.currentTimeMillis();
    }
    
    public void resume () {
        //pretend startTime was the right amount in the past
        if (endTime != 0) {
            startTime = System.currentTimeMillis() - endTime - startTime;
            endTime = 0;
        }
    }

    public void show () {
        lab.setText(this.toString());
    }

    public String toString () {
        long end;
        if (endTime == 0) {
            end = System.currentTimeMillis();
        } else {
            end = endTime;
        }
        long interval = end - startTime;
        long msec = (long)(interval % 1000);
        interval = interval / 1000;
        long s = (long)(interval % 60);
        interval = interval / 60;
        long m = (long)(interval % 60);
        long h = (long)(interval / 60);

        if (h > 0) {
            return h + ":" + (m < 10? "0" : "") + m + ":" + (s < 10? "0" : "") + s;
        } else {
            return m + ":" + (s < 10? "0" : "") + s + "." + (msec / 100);
        }
    }

}