Name: gsC80088 Date: 02/10/99


it's very simple. drawString just gives up when y is less
than a certain value, while drawLine and others keep working.



/*
 * this program demonstrates that after a translation, drawString
 * doesn't work with y values less than about -17 or so.
 */

import java.awt.*;

public class DrawStringBug extends Component {

   private Image image;
   private Graphics graphics;

   public Dimension getPreferredSize() {
      return(new Dimension(300,300));
   }

   public void setBounds(int theX, int theY, int theWidth, int theHeight) {
      super.setBounds(theX,theY,theWidth,theWidth);
      // prepare for double-buffering
      image = createImage(theWidth,theWidth);
      graphics = image.getGraphics();
      graphics.setColor(getBackground());
      graphics.fillRect(0,0,theWidth,theWidth);
      graphics.translate(theWidth/2,theWidth/2);
   }

   public void prePaint() {
      if (image == null) {
         return;
      }
      graphics.setColor(Color.black);
      for ( int y = 30; y > -100; y -= 5 ) {
         graphics.drawString(String.valueOf(y),0,y);
         graphics.drawLine(-30,y,-10,y);
      }
   }

   public void paint(Graphics theGraphics) {
      if (image != null) {
         theGraphics.drawImage(image,0,0,this);
      }
   }

   public void update(Graphics theGraphics) {
      if (image != null) {
         theGraphics.drawImage(image,0,0,this);
      }
   }

   public static void main(String [] args) {
      Frame f = new Frame();
      DrawStringBug bug = new DrawStringBug();
      f.add(bug,BorderLayout.CENTER);
      f.pack();
      f.setVisible(true);
      bug.prePaint();
      bug.repaint();
   }
}
(Review ID: 53473)
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