Name: boT120536 Date: 03/15/2001


java version "1.3.1-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-beta-b15)
Java HotSpot(TM) Client VM (build 1.3.1beta-b15, mixed mode)

//
//
// Demonstration of Font bugs.
//
// This program opens a window on the screen and then draws a String
// onto the window using a Font with a TRANSFORM attribute that
// changes whenever the "rotate" button is pressed. The transform
// used is a rotation is 90 degree increments and then 90 degree
// rotations mirror image, for a total of 8 possible orientations. A
// small red box is drawn at the anchor point and a yellow rectangle
// is drawn according to the bounds returned by Font.getStringBounds.
//
// There are two problems:
//
// 1) The anchor point of the string varies depending on the
// orientation.
//
// 2) The bounding box has bad values for all transforms other than
// the identity transform.
//
//
//
//

import javax.swing.*;
import java.util.*;

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import java.awt.font.*;


public class FontTest extends JComponent
{
   int type = 0;
   

   FontTest()
   {
      JButton b = new JButton("Rotate");
      this.add(b);
      b.setBounds(0, 0, 200, 50);
      b.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e)
            {
               type++;
               repaint();
            }
         });
   }
   

   private void doPaint(Graphics g)
   {
      Graphics2D g2 = (Graphics2D)g;

      double matrix[] = new double[4];
      switch(type % 8) {
      case 0:
         matrix[0] = 1d;
         matrix[1] = 0d;
         matrix[2] = 0d;
         matrix[3] = 1d;
         break;
      case 1:
         matrix[0] = 0d;
         matrix[1] = -1d;
         matrix[2] = 1d;
         matrix[3] = 0d;
         break;
      case 2:
         matrix[0] = -1d;
         matrix[1] = 0d;
         matrix[2] = 0d;
         matrix[3] = -1d;
         break;
      case 3:
         matrix[0] = 0d;
         matrix[1] = 1d;
         matrix[2] = -1d;
         matrix[3] = 0d;
         break;
      case 4:
         matrix[0] = -1d;
         matrix[1] = 0d;
         matrix[2] = 0d;
         matrix[3] = 1d;
         break;
      case 5:
         matrix[0] = 0d;
         matrix[1] = 1d;
         matrix[2] = 1d;
         matrix[3] = 0d;
         break;
      case 6:
         matrix[0] = 1d;
         matrix[1] = 0d;
         matrix[2] = 0d;
         matrix[3] = -1d;
         break;
      case 7:
         matrix[0] = 0d;
         matrix[1] = -1d;
         matrix[2] = -1d;
         matrix[3] = 0d;
         break;
      }
      
      Point pos = new Point(250, 250);

      AffineTransform t = new AffineTransform(matrix);

      HashMap m = new HashMap();
         
      m.put(TextAttribute.FAMILY, "SansSerif");
      m.put(TextAttribute.SIZE, new Float(72));
      m.put(TextAttribute.TRANSFORM, new TransformAttribute(t));
      Font f = new Font(m);

      

      g2.setFont(f);
      FontRenderContext frc = g2.getFontRenderContext();
      String s = "Qater";

      Rectangle2D border = f.getStringBounds(s, frc);
      System.out.println("Border: " + border);
      
      Rectangle2D.Double br = new Rectangle2D.Double(border.getMinX() + pos.x,
                                                     border.getMinY() + pos.y,
0d, 0d);
      br.add(border.getMaxX() + pos.x, border.getMaxY() + pos.y);
      

      g2.drawString(s, pos.x, pos.y);

      g2.setColor(Color.red);
      g2.fillRect(pos.x, pos.y, 3, 3);

      g2.setColor(Color.yellow);
      g2.draw(br);
   }

   public void paint(Graphics g)
   {
      super.paint(g);
      doPaint(g);
   }
      

   public static void main(String args[])
   {
      FontTest p1 = new FontTest();

      JFrame f1 = new JFrame("Spinner");
      f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      f1.getContentPane().add(p1, BorderLayout.CENTER);
      f1.setBounds(50, 50, 600, 600);
      f1.show();
   }
}
(Review ID: 118900)
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