// MyPanel1.java
//   -- extends MyPanel.java to show the use of text fonts

/*
 * Font families have several attributes:
 * 	(1) Font name.  E.g. Helvetica, Times Roman
 *	(2) Font style.  E.g., PLAIN, BOLD, ITALIC
 *	(3) Font size.  E.g., 12 Point
 * To construct a Font object, do
 *	Font helvb14 = new Font("Helvetica", Font.BOLD, 14);
 * To use the font, call the setFont method in the graphics object g:
 *	g.setFont(helvb14);
 * You can also specify font styles such as
 *	Font.BOLD + Font.ITALIC
 * Use "getAvailableFontFamilyNames" of GraphicsEnvironment class to
 * determine the fonts you can use.
 * Instead of Font names, AWT defines 5 "logical font names":
 *	SansSerif, Serif, Monospaced, Dialog, DialogInput
 * which are always available. 
 *
 * These concepts are illustrated below in our elaborated
 * "paintComponent" method.  The goal is ostensibly to print
 * "Hello" in bold and "World!" in bold-italic fonts.
 * To do this, we need to get the "FontMetrics" object
 * which has methods to measure the length of a string, say.
 **/

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

// text panel

class textPanel extends JPanel {
  // override the paintComponent method
  // THE MAIN DEMO OF THIS EXAMPLE:

  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Font f = new Font("SansSerif", Font.BOLD, 14);
    Font fi = new Font("SansSerif", Font.BOLD + Font.ITALIC, 14);
    FontMetrics fm = g.getFontMetrics(f);
    FontMetrics fim = g.getFontMetrics(fi);
    int cx = 75; int cy = 100;
    g.setFont(f);
    g.drawString("Hello, ", cx, cy);
    cx += fm.stringWidth("Hello, ");
    g.setFont(fi);
    g.drawString("World!", cx, cy);
  } //paintComponent
} //class textPanel

class MyFrame extends JFrame {
  public MyFrame(String s) {
	// Frame Parameters
	setTitle(s);
	setSize(300,200); // default size is 0,0
	setLocation(10,200); // default is 0,0 (top left corner)

	// 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 MyPanel1 {
  public static void main(String[] args) {
    JFrame f = new MyFrame("My Hello World Frame");
    f.show();
  } //main
} //class MyPanel1


/* NOTES:
	The java.awt.FontMetrics.* class also has methods to get
	other properties of the font: its ascent, descent,
	leading, height, etc.
 */