/*

 * QuickTime for Java SDK Sample Code

 *

 * Usage subject to restrictions in SDK License Agreement

 * Copyright: © 2000 Apple Computer, Inc.

 */

import quicktime.app.time.*;

import quicktime.std.*;

import quicktime.*;

import quicktime.std.clocks.*;

import java.text.DecimalFormat;

import java.awt.*;

/* This class retreives statistical information about the presentation and displays it in the 

 * main application window 

 */

public class StatDrawer extends Tasking {

    private static TaskThread updateThread = new TaskThread ("Default SG Tasker", 600);

    /* Constructor- sets up the default tasking thread */

    public StatDrawer (SimplePres p) {

        this.pres = p;

        setDefaultTasker(updateThread);

    }

    /* This method resets the active SimplePres object to get data from */

    public void setPres (SimplePres p) {

        boolean tasking = (getTasker() == null);

        stopTasking();

        this.pres = p;

        if ( tasking )

            startTasking();

    }

    /**

     * This method performs idle processing for the SGDrawer and will be automatically

     * called if this object is added to the TaskThread object.

     * It the sequence grabber has completed its capture task this method

     * will stop tasking the SGDrawer, stop the sequence grabber and call

     * the SGCaptureCallback if registered to notify the application that Sequence grabbing

     * is complete.

     * @see quicktime.util.TaskThread

     */

    public synchronized final void task() throws QTException { 

        TimeBase t = pres.pres.getTimeBase();

        TimeRecord r = t.getTRTime();

        timeLabel.setText( timeRecordToHHMMSSFF(r, 30, ':', '.'));

        rateLabel.setText (new Integer(pres.pres.getTotalDataRate()).toString());

    }   

   /**

    * Returns the specified time record as a hour-minutes-seconds-frames string

    * according to the specified frames per second value. The first char

    * argument is used to separate hours, minutes and seconds and the second

    * char is used to separate the frames from the rest of the HHMMSSFF string.

    * A null time record or a zero frames-per-second value will result in a null

    * returned by the function. Negative frames-per-second values are converted

    * to positive integers (absolute value). If frames-per-second exceeds 1000

    * 1000 will be used.

    *

    * @author Ilias Argyriou <ilias_argyriou@hotmail.com>

    *

    * Examples:

    * timeRecordToHHMMSSFF(<TimeRecord>, 10, '-', '-')  -> "HH-MM-SS-F"

    * timeRecordToHHMMSSFF(<TimeRecord>, 30, ':', '.')  -> "HH:MM:SS.FF"

    * timeRecordToHHMMSSFF(<TimeRecord>, 500, ';', '.') -> "HH;MM;SS.FFF"

    */

    public static String timeRecordToHHMMSSFF(TimeRecord tr, int fps, char ss, char fs) {

        if (tr == null || fps == 0) {

            return null;

        }

        fps = Math.abs(fps);

        // If frames-per-second exceeds 1000, 1000 will be used.

        if (fps > 1000) {

            fps = 1000;

        }

        tr.convertTimeScale(fps);

        StringBuffer sb = new StringBuffer();

        long value = tr.getValue();

        int scale = tr.getScale();

        if (scale <= 0) {

            return null;

        }

        long h = value / (scale * 3600);

        long m = (value / (scale * 60)) % 60;

        long s = (value / scale) % 60;

        long f = value % scale;

        sb.append(DOUBLE_DIGIT_DF.format(h));

        sb.append(ss);

        sb.append(DOUBLE_DIGIT_DF.format(m));

        sb.append(ss);

        sb.append(DOUBLE_DIGIT_DF.format(s));

        sb.append(fs);

        if (fps <= 10) {

            sb.append(SINGLE_DIGIT_DF.format(f));

        } else if (fps <= 100) {

            sb.append(DOUBLE_DIGIT_DF.format(f));

        } else if (fps <= 1000) {

            sb.append(TRIPLE_DIGIT_DF.format(f));

        }

        return sb.toString();

    }

//_________________________ INSTANCE VARIABLES

    private SimplePres pres;

    public Label timeLabel, rateLabel;

        /** DecimalFormats used to display integer values as strings. */

    private static DecimalFormat SINGLE_DIGIT_DF = new DecimalFormat("0");

    private static DecimalFormat DOUBLE_DIGIT_DF = new DecimalFormat("00");

    private static DecimalFormat TRIPLE_DIGIT_DF = new DecimalFormat("000");

}