/*
 * TestFontMetrics.java
 *
 * Created on June 6, 2003, 11:44 AM
 */

import java.awt.*;

/** Test FontMetrics
 *
 * @author  scott
 */
public class TestFontMetrics extends Component
{
  private int prevWidth=0, prevHeight=0;
  String text;
  static public final String VALUE_FONT_NAME = "luxi sans";  // a scalable font for rendering field values
  Font font;
  
  public TestFontMetrics (String text,int pointSize)
  {
    this.text = text;
    font = new Font (VALUE_FONT_NAME,Font.PLAIN,pointSize);
  }
  
  public void paint ( Graphics g )
  {
    if( getWidth () != prevWidth || getHeight () != prevHeight )
    {
      prevWidth = getWidth();
      prevHeight = getHeight();
    }
    g.setColor (Color.white);
    g.fillRect (0,0,getWidth (),getHeight ());

    g.setColor (Color.black);
    g.setFont (font);
    FontMetrics fm = g.getFontMetrics ();
    int x = 20;
    int y = getHeight()/2;
    
    g.setColor (Color.orange);
    g.drawLine(0,y,getWidth(),y);
    
    int asc = y - fm.getAscent ();
    int des = y + fm.getDescent ();
    g.setColor (Color.blue);
    g.drawLine(0,asc,getWidth(),asc);
    g.drawLine(0,des,getWidth(),des);
    
    int aMax = y - fm.getMaxAscent ();
    int dMax = y + fm.getMaxDescent ();
    g.setColor (Color.yellow);
    g.drawLine(0,aMax,getWidth(),aMax);
    g.drawLine(0,dMax,getWidth(),dMax);

    g.setColor (Color.black);
    g.drawString(text,x,y);
    
    
    System.out.println("Font metrics:"
    + "\n  getAscent:" + fm.getAscent ()
    + "\n  getDescent:" + fm.getDescent ()
    + "\n  getMaxAdvance:" + fm.getMaxAdvance ()
    + "\n  getMaxAscent:" + fm.getMaxAscent ()
    + "\n  getMaxDescent:" + fm.getMaxDescent ()
    + "\n  getHeight:" + fm.getHeight ()
    + "\n  getLeading:" + fm.getLeading ()
    + "\n  getFont:" + fm.getFont ().toString ()
    );
    
  }
  
  public static void main ( String[] args )
  {
    java.awt.Frame f = new java.awt.Frame ();
    f.setTitle ("TestFontMetrics: " + System.getProperties ().getProperty ("java.vm.vendor")
    + " " + System.getProperties ().getProperty ("java.vm.version"));
    f.addWindowListener (new java.awt.event.WindowAdapter ()
    {
      public void windowClosing (java.awt.event.WindowEvent evt)
      {
        System.exit (0);
      }
    });
    int pointsize = 50;
    if (args.length > 0)
    {
      try
      {
        pointsize = Integer.parseInt (args[0]);
      }
      catch (Throwable t)
      {
      }
    }
    f.add ( new TestFontMetrics ("A b i y | O M 123",pointsize) );
    f.pack ();
    f.setVisible (true);
    f.repaint();
  }
  
  public Dimension getPreferredSize ()
  {
    final Dimension dim = new Dimension (200,200);
    return dim;
  }
  public Dimension getMinimumSize ()
  {
    final Dimension dim = new Dimension (20,20);
    return dim;
  }
  
}