// SampleGraphics.java

// To use this, first do a search-and-replace of "SampleGraphics" with
// your class name, say MyGraphics (if the file is MyGraphics.java).

import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import javax.swing.*;

public class SampleGraphics extends JComponent {
	
  ////////////////////////////////////////////
  // Class and instance variables
  ////////////////////////////////////////////

  // array of colors: access with colors.length and colors[i]
  public static final Color[] colors = {
    Color.yellow, Color.black, Color.green, Color.blue,
    Color.orange, Color.magenta, Color.gray
   };

  public static final String appName  = "SampleGraphics";
  public static final int WIN_WIDTH   = 400;
  public static final int WIN_HEIGHT  = 400;
  public static final int TIMER_DELAY = 1000; // milliseconds
  
  ////////////////////////////////////////////
  // Paint
  ////////////////////////////////////////////
  
  public void paintComponent(Graphics page) {
    // get the dimensions of the draw area
    int width  = this.getWidth();
    int height = this.getHeight();
    
    // clear the background
    page.setColor(Color.white);
    page.fillRect(0,0,width,height);
  }
  
  ////////////////////////////////////////////
  // Event Handlers
  ////////////////////////////////////////////

  public void onMousePressed(int x, int y) {
    System.out.println("mousePressed at " + x + "," + y);
  }

  public void onMouseDragged(int x, int y) {
    System.out.println("mouseDragged at " + x + "," + y);
  }

  public void onMouseReleased(int x, int y) {
    System.out.println("mouseReleased at " + x + "," + y);
  }

  public void onKeyPressed(KeyEvent e) {
    int keyCode = e.getKeyCode();
    char keyChar = e.getKeyChar();
    System.out.println("keyPressed, code = " + keyCode + 
                       ", char = '" + keyChar + "'");
  }

  public void onTimer() {
    // System.out.println("onTimer called");
  }

  ////////////////////////////////////////////////////////////////////////////
  ////////////////////////////////////////////////////////////////////////////
  // DO NOT MODIFY CODE BELOW HERE!
  ////////////////////////////////////////////////////////////////////////////
  ////////////////////////////////////////////////////////////////////////////
  
  ////////////////////////////////////////////
  // addEventListeners
  ////////////////////////////////////////////

  public void addEventListeners() {
    // add actions in response to mouse events
    addMouseListener(new MouseAdapter() {
      public void mousePressed(MouseEvent e) {
        onMousePressed(e.getX(),e.getY());
      }
      public void mouseReleased(MouseEvent e) {
        onMouseReleased(e.getX(),e.getY());
      }
    });
    
    // and for mouse motion events
    addMouseMotionListener(new MouseMotionAdapter() {
      public void mouseDragged(MouseEvent e) {
        onMouseDragged(e.getX(),e.getY());
      }
    });
    
    // and for keyboard events
    addKeyListener(new KeyAdapter() {
      public void keyPressed(KeyEvent e) {
        onKeyPressed(e);
      }
    });

    // and for timer events
    int timerMilliseconds = TIMER_DELAY;  // 1000ms = 1 second
    new Timer(timerMilliseconds, new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        onTimer();
      }    
    }).start();

  }

  ////////////////////////////////////////////
  // Main
  ////////////////////////////////////////////
  public static void main(String[] args) {
    SampleGraphics component = new SampleGraphics();
    component.addEventListeners();
    final JFrame frame = new JFrame(appName);
    frame.getContentPane().add(component);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    component.requestFocusInWindow(); // send key events to "component"
    frame.setSize(WIN_WIDTH,WIN_HEIGHT);
    frame.show();
  }  
}