package JSynExamples;
import java.util.*;
import java.awt.*;
import java.applet.Applet;
import com.softsynth.jsyn.*;
import com.softsynth.jsyn.view102.*;
import com.softsynth.jsyn.circuits.*;

/**
 * Play with an oscillator being modulated by an LFO.
 *
 * @author Phil Burk
 * (C) 1997 Phil Burk
 */

public class TJ_SawFader extends Applet
{
	SawtoothOscillator myOsc;
	LineOut            myOut;
	TriangleOscillator myLFO;
	AddUnit            mySum;
	ExponentialLag     myLag;
	PanUnit            myPanner;
	Button ping;

/* Can be run as either an application or as an applet. */
    public static void main(String args[])
	{
		TJ_SawFader applet = new TJ_SawFader();
		AppletFrame frame = new AppletFrame("Test Java Synthesis", applet);
		frame.resize(600,300);
		frame.show();
/* Begin test after frame opened so that DirectSound will use Java window. */
		frame.test();
	}

/*
 * Setup synthesis.
 */
	public void start()
	{
		setLayout( new GridLayout(0,1) );
		
		try
		{
/* Start synthesis engine. */
		Synth.startEngine( 0 );
		
/* Make waveform unit generators. */
		myOsc = new SawtoothOscillator();
		myLFO = new TriangleOscillator();
		mySum = new AddUnit();
		myLag = new ExponentialLag();
		myPanner = new PanUnit();
		myOut = new LineOut();

/* LFO and Lag are added together to calculate new frequency. */
		myLag.output.connect( mySum.inputB );
		myLFO.output.connect( mySum.inputA );
		mySum.output.connect( myOsc.frequency );
/* Connect oscillator to both channels of stereo player. */
		myOsc.output.connect( myPanner.input );
		myPanner.output.connect( 0, myOut.input, 0 );
		myPanner.output.connect( 1, myOut.input, 1 );

/* Change port types for user friendly units. */
		myLag.input.setSignalType( Synth.SIGNAL_TYPE_OSC_FREQ );
		myLag.current.setSignalType( Synth.SIGNAL_TYPE_OSC_FREQ );
		myLFO.amplitude.setSignalType( Synth.SIGNAL_TYPE_OSC_FREQ );

		add( new PortFader( myOsc.amplitude, 0.5, 0.0, 0.999 ) );
		add( new PortFader( myLFO.frequency, "ModRate", 0.2, 0.0, 20.0 ) );
		add( new PortFader( myLFO.amplitude, "ModDepth", 400.0, 0.0, 2000.0 ) );
		add( new PortFader( myLag.input, "CenterFreq", 200.0, 0.0, 2000.0 ) );
		add( new PortFader( myPanner.pan,  0.0, -1.0, 1.0 ) );
		add( new PortFader( myLag.halfLife,  0.1, 0.0, 1.0 ) );
		add( ping = new Button("Ping") );

/* Start execution of units. */
		myOut.start();
		myOsc.start();
		mySum.start();
		myLag.start();
		myPanner.start();
		myLFO.start();

		} catch (SynthException e) {
			SynthAlert.showError(this,e);
		}

		getParent().validate();
		getToolkit().sync();
	}
	

	public void stop()
	{
		try
		{
			myOsc.delete();
			myOut.delete();
			myLFO.delete();
			mySum.delete();
			myLag.delete();
			myOsc = null;
			myOut = null;
			myLFO = null;
			mySum = null;
			myLag = null;
			removeAll(); // remove portFaders
/* Turn off tracing. */
			Synth.verbosity = Synth.SILENT;
/* Stop synthesis engine. */
			Synth.stopEngine();

		} catch (SynthException e) {
			SynthAlert.showError(this,e);
		}
	}

/* If the ping button is hit, set current value of Lag_Exponential high. */
	public boolean action(Event evt, Object what)
	{
		try
		{
			if( evt.target == ping )
			{
					myLag.current.set( 2000.0);
					return true;
			}
		} catch (SynthException e) {
			SynthAlert.showError(this,e);
			return true;
		}
		return false;
    }

}