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 ImageMapApplet extends Shout3DApplet{
  String s1 = "Change Intensity";
  Scrollbar horizScroll1;
  Image mapImage;
  MediaTracker trackImage;
  int width, height;
  
    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(26, 1, 5, 5)) ;
	horizScroll1 = new Scrollbar(
				     Scrollbar.HORIZONTAL, 50, 10 , 0,
				     100);
	
	buttonsPanel.add(horizScroll1);
	buttonsPanel.add(sLabel1);
	add( "East", buttonsPanel);

	trackImage = new MediaTracker(this);
	mapImage = getImage(getDocumentBase(), "ColorMap.gif");
	trackImage.addImage(mapImage, 0);
	try{
	  trackImage.waitForAll();
	}
	catch(InterruptedException e) { }
    }
  
  public void paint ( Graphics g){
    g.drawImage(mapImage, 150, 300, this);
  }
  
  public void initShout3DPanel(){
    panel = new ImageMapPanel(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 mouseMove(Event e, int x, int y){
    int x_start = 150;
    int y_start = 300;
    int x_end = 450;
    int y_end = 600;
    int x_width = x_end - x_start;
    int y_height = y_end - y_start;
    if ( (x>x_start) && (x<x_end) && (y>y_start) &&(y<y_end))
      getColorMap((float)(x-x_start)/(float)x_width, 
	      (float)(y-y_start)/(float)y_height);
    return(true);
  }

  public boolean handleEvent(Event event) {
	if (event.target == horizScroll1 &&
	    isScrollEvent(event.id)) {
	    changeIntensity(horizScroll1.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 getColorMap(float greenComponent, float blueComponent){
    Material object_material;
    if ((object_material = (Material) 
	     getNodeByName("Red_mat") ) == null)
              throw new Shout3DException("could not find node Red_mat");
	if (object_material != null){
	    object_material.diffuseColor.getValue()[1] = greenComponent;
	    object_material.diffuseColor.getValue()[2] = blueComponent;
	    object_material.diffuseColor.setValue
		(object_material.diffuseColor.getValue());
	}
    }

  
}