package applets;

import java.applet.*;
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import java.util.Date;
import java.net.URL;
import shout3d.core.*;
import shout3d.*;

public class FuncSlidersApp extends Shout3DApplet{
    String s1 = "Change Intensity";
    String s2 = "Red Component";
    Scrollbar horizScroll1;
    Scrollbar horizScroll2;

    public void init(){
        super.init() ;
	setLayout(new BorderLayout());
	Panel buttonsPanel = new Panel() ;
	Label sLabel1 = new Label(s1);
	Label sLabel2 = new Label(s2);
	buttonsPanel.setLayout(new GridLayout(13, 1, 5, 5)) ;
	horizScroll1 = new Scrollbar(
				     Scrollbar.HORIZONTAL, 50, 10 , 0,
				     100);
	
	horizScroll2 = new Scrollbar(Scrollbar.HORIZONTAL, 50, 10 , 0,
				       100);
	System.out.println( "Layout is " + getLayout() ) ;
	buttonsPanel.add(horizScroll1);
	buttonsPanel.add(sLabel1);
    	buttonsPanel.add(horizScroll2);
	buttonsPanel.add(sLabel2);
	add( "East", buttonsPanel);
    }
    
    public void initShout3DPanel(){
	panel = new FunctionSliders(this);
    }

    private boolean isScrollEvent(int eventID) {
	return(eventID == Event.SCROLL_LINE_UP ||
	       eventID == Event.SCROLL_LINE_DOWN ||
	       eventID == Event.SCROLL_PAGE_UP ||
	       eventID == Event.SCROLL_PAGE_DOWN ||
	       eventID == Event.SCROLL_ABSOLUTE);
    }       

    public boolean handleEvent(Event event) {
	if (event.target == horizScroll1 &&
	    isScrollEvent(event.id)) {
	    changeIntensity(horizScroll1.getValue());
	    return(true);
	} 
	else if (event.target == horizScroll2 &&
		 isScrollEvent(event.id)) {
	    changeRedComponent(horizScroll2.getValue());
	    return(true);
	} 
	else
	    return(super.handleEvent(event));
    }           

    public  void changeIntensity(int lightIntensity){
	DirectionalLight light_source;
	if ((light_source = (DirectionalLight) 
	     getNodeByName("Variable_Light") ) == null)
              throw new Shout3DException("could not find node Variable_Light");
	if (light_source != null){
	    light_source.intensity.setValue((float)lightIntensity/(float)100.0);
	}
    }

    public void changeRedComponent(int redComponent){
       Material object_material;
	if ((object_material = (Material) 
	     getNodeByName("Red_mat") ) == null)
              throw new Shout3DException("could not find node Variable_Light");
	if (object_material != null){
	    object_material.diffuseColor.getValue()[0] = (float)redComponent/100.0f;
	    object_material.diffuseColor.setValue
		(object_material.diffuseColor.getValue());
	}
    }
    

}