/*
   Julian Avalos
   Project 2
   Simple Paint Program
   Date Last Modified: 06/09/2014
*/

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.applet.*;
import java.net.*;

public class Paint_Applet extends Applet implements ItemListener {

   //FIELD DECLARATION
   private int lastX;
   private int lastY;
   private int x;
   private int y;
   private JButton clear;
   private Graphics g;
   private final int WIDTH = 500;
   private final int HEIGHT = 500;
   private Color current = Color.BLACK;
   private JPanel panel = new JPanel();
   private JPanel panel2 = new JPanel();
   private JPanel panel3 = new JPanel();
   private Choice Colors = new Choice();
   private JLabel imageLabel;

   java.net.URL imageURL = Paint_Applet.class.getResource("download.jpg");


   //CONSTRUCTOR
   public void init(){

      //ADD COLOR CHOICES TO CHOICE OBJECT
      Colors.add("Black");
      Colors.add("Blue");
      Colors.add("Red");
      Colors.add("Yellow");
      Colors.add("Green");

      //ADD LISTENER TO CHOICE OBJECT
      Colors.addItemListener(this);

      //BUILD FRAME
      panel.setLayout(new BorderLayout());
      //this.setBackground(Color.WHITE);
      clear = new JButton();
      clear.setIcon(new ImageIcon(imageURL));
      panel3.add(Colors);
      panel3.add(clear, BorderLayout.CENTER);
      panel.add(panel2, BorderLayout.CENTER);
      panel.add(panel3, BorderLayout.SOUTH);
      panel2.setBackground(Color.WHITE);
      add(panel);
      //setSize(WIDTH, HEIGHT);
      setVisible(true);

      //ADD LISTENERS TO CLEAR BUTTON AND MOUSE
      clear.addActionListener(new ButtonListener());
      panel2.addMouseListener(new MyMouseListener());
      panel2.addMouseMotionListener(new MyMouseMotionListener());
   }

   //ADD FUNCTIONALITY TO CLEAR BUTTON
   private class ButtonListener implements ActionListener{
      public void actionPerformed(ActionEvent e){
         g = panel2.getGraphics();
         Rectangle rect = panel2.getBounds();
         g.setColor(Color.WHITE);
         g.fillRect(rect.x, rect.y, rect.width, rect.height);
      }
   }

   //ADD FUNCTIONALITY TO CHOICE OBJECT
   public void itemStateChanged(ItemEvent e){
      int currentColor = Colors.getSelectedIndex();
      switch(currentColor){
         case 0:
            current = Color.black;
            break;
         case 1:
            current = Color.blue;
            break;
         case 2:
            current = Color.red;
            break;
         case 3:
            current = Color.yellow;
            break;
         case 4:
            current = Color.green;
            break;
      }
   }

   //ADD FUNCTIONALITY TO MOUSE BUTTON
   private class MyMouseListener implements MouseListener{
      public void mouseClicked(MouseEvent e){}
      public void mousePressed(MouseEvent e){
         lastX = e.getX();
         lastY = e.getY();
      }
      public void mouseReleased(MouseEvent e){}
      public void mouseEntered(MouseEvent e){}
      public void mouseExited(MouseEvent e){}
   }

   //ADD FUNCTIONALITY TO MOUSE MOVEMENT
   private class MyMouseMotionListener implements MouseMotionListener {
      public void mouseDragged(MouseEvent e){
         x = e.getX();
         y = e.getY();
         Graphics g = panel2.getGraphics();
         g.setColor(current);
         g.drawLine(lastX, lastY, x, y);
         lastX = x;
         lastY = y;
      }
      public void mouseMoved(MouseEvent e){}
    }

}