// MyPanel2.java
//   -- extends MyPanel1.java to show the use of colors

/**
 * We further elaborate on MyPanel1 to show colors.
 * The 13 standard colors are:
 *	black, blue, cyan, darkGray
 *	gray, green, lightGray, magenta
 *	orange, pink, red, white, yellow
 * Thus, before any drawing actions, you can set
 * the color by calling
 *	g.setColor(Color.pink); 
 * You can also synthesize your own color with
 *	Color(int R, int G, int B)
 * E.g.,
 * 	g.setColor(new Color(0, 128, 255));
 * You can make a current color brighter or darker:
 *	c.brighter().brighter();
 *	c.darker();
 * Other useful methods are:
 *	JFrame f = new MyFrame();
 *	f.setBackground(Color.white);
 *	f.setForeground(Color.lightGray);
 *	f.show();
 **/

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

// text panel

class textPanel extends JPanel {
  // override the paintComponent method
  // THIS IS THE MAIN DEMO OF THIS EXAMPLE
  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Font f = new Font("SansSerif", Font.BOLD, 14);
    FontMetrics fm = g.getFontMetrics(f);
    g.setFont(f);

    g.setColor(Color.magenta);
    int cx = 75; int cy = 100;
    g.drawString("Hello, ", cx, cy);

    cx += fm.stringWidth("Hello, ");
    g.setColor(new Color(64, 128, 0));  //dull green
    g.drawString("World!", cx, cy);
  } //paintComponent
} //class textPanel

class MyFrame extends JFrame {
  public MyFrame() {
	// Frame Parameters
	setTitle("My Color Frame");
	setSize(300,200); // default size is 0,0
	setLocation(10,200); // default is 0,0 (top left corner)
	setBackground(Color.yellow);  // shown briefly, then replaced by Grey.
	setForeground(Color.pink);  // when is this shown???

	// Window Listeners
	addWindowListener(new WindowAdapter() {
	  public void windowClosing(WindowEvent e) {
		System.exit(0);
	  } //windowClosing
	}); //addWindowLister

	// Add Panels
	Container contentPane = getContentPane();
	contentPane.add(new textPanel());
 
  } //constructor MyFrame
} //class MyFrame

public class MyPanel2 {
  public static void main(String[] args) {
    JFrame f = new MyFrame();
    f.show();
  } //main
} //class MyPanel2


/* NOTES:
 * The class SystemColor has various color elements
 * for the entire desktop: thus we can use "SystemColor.XXX"
 * where XXX=
 *	desktop (Background color of desktop)
 *	activeCaption
 *	activeCaptionText
 *	activeCaptionBorder
 *	inactiveCaption, etc
 *	window (Background for windows)
 * 	windowBorder
 *	windowText
 *	menu
 *	menuText
 *	...
 */