package gui;

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
import gui.elements.*;
import java.awt.event.*;

/**
 * <p>Title: Java Media for Chapter 4 of Experiencing Sensation and Perception</p>
 * <p>Description: draws four arrows that can be clicked
 * as a response,
 * it uses the arrow keys as backup</p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: Hanover College</p>
 * @author John H. Krantz, Ph.D.
 * @version 0.1
 */

public class DirectionResponses extends JPanel
                implements KeyListener, MouseMotionListener,
                MouseListener {
	static final long serialVersionUID = 0;

  // the fours arrows
  Arrow up = new Arrow();
  Arrow left = new Arrow();
  Arrow down = new Arrow();
  Arrow right = new Arrow();

  // arrow areas
  Rectangle2D upRect = new Rectangle2D.Double(20,0,10,20);
  Rectangle2D leftRect = new Rectangle2D.Double(0,20,20,10);
  Rectangle2D downRect = new Rectangle2D.Double(20,30,10,20);
  Rectangle2D rightRect = new Rectangle2D.Double(30,20,20,10);

  // response variables
  public final static int NONE = -1;
  public final static int UP = 0;
  public final static int LEFT = 1;
  public final static int DOWN = 2;
  public final static int RIGHT = 3;
  private int pressed = -1;

  // arrow states
  final int NORM = 1;
  final int OVER = 2;
  final int CLICKED = 3;
  int upState = NORM;
  int leftState = NORM;
  int downState = NORM;
  int rightState = NORM;

  int size = 55;

  public DirectionResponses() {
    setSize(size,size);
    setPreferredSize(new Dimension(size,size));

    defineArrows();
  }

  public void paint(Graphics g){
    Graphics2D g2d = (Graphics2D)g;
    g2d.setPaint(Color.LIGHT_GRAY);
    g2d.fill(new Rectangle(0,0,size,size));
    // draw the arrows
    g2d.translate(25,25);
    drawArrow(g2d,up,upState);
    drawArrow(g2d,down,downState);
    g2d.rotate(-Math.PI/2.0);
    drawArrow(g2d,left,leftState);
    drawArrow(g2d,right,rightState);
  }

  private void drawArrow(Graphics2D g2d, Arrow a, int state){
    Color drawColor = Color.red;
    float drawWidth = 2.0f;
    if (state == NORM) {
      drawColor = Color.red;
      drawWidth = 2.0f;
    }
    if (state == OVER) {
      drawColor = Color.green;
      drawWidth = 4.0f;
    }
    if (state == CLICKED) {
      drawColor = Color.blue;
      drawWidth = 4.0f;
    }
    g2d.setPaint(drawColor);
    g2d.setStroke(new BasicStroke(drawWidth));
    g2d.draw(a.formArrow());
  }

  private void defineArrows(){
    up.setDirection(up.DRAWUP);
    up.setStart(0,-5);
    up.setHeight(20);
    up.setHeadLength(5);

    down.setDirection(up.DRAWDOWN);
    down.setStart(0,5);
    down.setHeight(20);
    down.setHeadLength(5);

    left.setDirection(up.DRAWUP);
    left.setStart(0,-5);
    left.setHeight(20);
    left.setHeadLength(5);

    right.setDirection(up.DRAWDOWN);
    right.setStart(0,5);
    right.setHeight(20);
    right.setHeadLength(5);
  }

  public void mouseClicked(MouseEvent e) {
//JOptionPane.showMessageDialog(null, "here");
    Point loc = e.getPoint();
    //where pressed
    if (upRect.contains(loc.x,loc.y)){
        pressed = UP;
        upState = CLICKED;
        downState = NORM;
        leftState=NORM;
        rightState=NORM;
    }
    else if (leftRect.contains(loc.x,loc.y)){
        pressed = LEFT;
        leftState = CLICKED;
        downState = NORM;
        upState=NORM;
        rightState=NORM;
    }
    else if (downRect.contains(loc.x,loc.y)){
        pressed = DOWN;
        downState = CLICKED;
        upState = NORM;
        leftState=NORM;
        rightState=NORM;
    }
    else if (rightRect.contains(loc.x,loc.y)){
        pressed = RIGHT;
        rightState = CLICKED;
        downState = NORM;
        leftState=NORM;
        upState=NORM;
    }
    else{
     pressed = NONE;
     upState = NORM;
     downState = NORM;
     leftState=NORM;
     rightState=NORM;
    }
    repaint();
  }
  public void mousePressed(MouseEvent e){
  }
  public void mouseReleased(MouseEvent e){
     upState = NORM;
     downState = NORM;
     leftState=NORM;
     rightState=NORM;
     repaint();
  }

  public void mouseMoved(MouseEvent e){
    Point loc = e.getPoint();
    //where pressed
    if (upRect.contains(loc.x,loc.y)){
        upState = OVER;
        downState = NORM;
        leftState=NORM;
        rightState=NORM;
    }
    else if (leftRect.contains(loc.x,loc.y)){
        leftState = OVER;
        downState = NORM;
        upState=NORM;
        rightState=NORM;
    }
    else if (downRect.contains(loc.x,loc.y)){
        downState = OVER;
        upState = NORM;
        leftState=NORM;
        rightState=NORM;
    }
    else if (rightRect.contains(loc.x,loc.y)){
        rightState = OVER;
        downState = NORM;
        leftState=NORM;
        upState=NORM;
    }
    else{
     upState = NORM;
     downState = NORM;
     leftState=NORM;
     rightState=NORM;
    }
    repaint();
  }
  public void mouseDragged(MouseEvent e){}
  public void mouseEntered(MouseEvent e){}
  public void mouseExited(MouseEvent e){
     upState = NORM;
     downState = NORM;
     leftState=NORM;
     rightState=NORM;
     repaint();
  }

  public void keyPressed(KeyEvent e) {
    int key = e.getKeyCode();

    if (key == KeyEvent.VK_UP){
        pressed = UP;
        rightState = NORM;
        downState = NORM;
        leftState=NORM;
        upState=CLICKED;
    }
    else if (key == KeyEvent.VK_LEFT){
        pressed = LEFT;
        rightState = NORM;
        downState = NORM;
        leftState=CLICKED;
        upState=NORM;
    }
    else if (key == KeyEvent.VK_DOWN){
        pressed = DOWN;
        rightState = NORM;
        downState = CLICKED;
        leftState=NORM;
        upState=NORM;
    }
    else if (key == KeyEvent.VK_RIGHT){
        pressed = RIGHT;
        rightState = CLICKED;
        downState = NORM;
        leftState=NORM;
        upState=NORM;
    }
    else{
       pressed = NONE;
        rightState = NORM;
        downState = NORM;
        leftState=NORM;
        upState=NORM;
    }
    repaint();

  }
  public void keyReleased(KeyEvent e){
        rightState = NORM;
        downState = NORM;
        leftState=NORM;
        upState=NORM;
        repaint();
  }
  public void keyTyped(KeyEvent e){
  }

  // get methods
  public int getDirection() {
    int temp = pressed;
    pressed = NONE;
    return temp;
  }
}