package swingExamples;

import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;

class XORModeDisplayPanel extends JPanel
{
  public XORModeDisplayPanel()
  {
    setBackground(Color.BLACK);
  }
  
  public void paintComponent(Graphics g)
  {
    super.paintComponent(g);
    
    Font font = new Font("sansserif", Font.BOLD, 16);
    g.setFont(font);
    g.setColor(Color.WHITE);
    
    g.drawString("Paint mode:", 5, 20);
    paintInMode(g, 0, 30, false); // Use paint mode
    
    g.setColor(Color.WHITE);
    g.fillRect(5, 170, 220, 3);
    
    g.drawString("XOR mode:", 5, 200);
    paintInMode(g, 0, 210, true); // Use XOR mode
  }
  
  private void paintInMode(Graphics g, int x, int y, boolean useXOR)
  {
    // Ensure we start in paint mode.
    g.setPaintMode();
    
    // Draw a red filled rectangle
    g.setColor(Color.RED);
    g.fillRect(x + 10, y + 10, 80, 30);
    
    // Draw a green filled rectangle, overlapping the red rectangle
    g.setColor(Color.GREEN);
    g.fillRect(x + 50, y + 20, 80, 30);
    
    // Draw a blue filled rectangle, overlapping the green rectangle
    g.setColor(Color.BLUE);
    g.fillRect(x + 130, y + 40, 80, 30);
    
    if (useXOR)
    {
      // Set XOR mode, with a green XOR color
      g.setXORMode(Color.GREEN);
    }
    
    // Draw another blue filled rectangle, offset from the previous blue one.
    g.fillRect(x + 90, y + 30, 80, 30);
    
    if (useXOR)
    {
      // Return to paint mode.
      g.setPaintMode();
    }
    
    // Draw a red filled rectangle
    g.setColor(Color.RED);
    g.fillRect(x + 10, y + 80, 80, 30);
    
    if (useXOR)
    {
      // Go into XOR mode, with an XOR color of red
      g.setXORMode(Color.RED);
    }
    
    // Draw a blue filled rectangle, overlapping the red rectangle
    g.setColor(Color.BLUE);
    g.fillRect(x + 50, y + 90, 80, 30);
    
    // Draw another blue filled rectangle slightly offset from the previous
    // blue rectangle.
    g.fillRect(x + 55, y + 95, 80, 30);
  }
}

class XORModeDisplayFrame extends JFrame
{
  public XORModeDisplayFrame()
  {
    setTitle("XOR Mode Display");
    setSize(250, 400);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    Container contentPane = getContentPane();
    contentPane.add(new XORModeDisplayPanel());
  }
}

public class XORModeDisplay
{
  public static void main(String[] args)
  {
    XORModeDisplayFrame f = new XORModeDisplayFrame();
    f.setVisible(true);
  }
}