Name: krT82822 Date: 01/13/2000


1/13/2000 eval1127@eng -- still broken as of 1.3.0 build "R", but is also broken in 1.2.2-001 and 1.2.2 (so it wasn't a regression from 1.2.2 to 1.2.2-001).

java version "1.2.2"
Classic VM (build JDK-1.2.2-001, native threads, symcjit)

This is a duplicate of Bug ID:4188744 which is listed as fixed as of 1.2.2 but
is NOT fixed. Using Graphics.copyArea() with any negative translation value (x
or y) will not produce the correct result. Positive values seem to work fine.
This has been broken since the first Java1.2 beta.

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import java.awt.*;
import java.awt.event.*;

public class CopyAreaTest extends Frame implements WindowListener, ActionListener {

   Image bigX;
   CopyAreaCanvas cc;
   Button bUp,bDown,bLeft,bRight;

   public static void main(String argv[]) {
      new CopyAreaTest();
   }
   public CopyAreaTest() {
      super("CopyArea Test");
      setSize(400,400);
      cc = new CopyAreaCanvas();
      setLayout(new BorderLayout());
      add(cc,"Center");
      bUp = new Button("^");
      bUp.addActionListener(this);
      bDown = new Button("v");
      bDown.addActionListener(this);
      bLeft = new Button("<");
      bLeft.addActionListener(this);
      bRight = new Button(">");
      bRight.addActionListener(this);
      add(bUp,"North");
      add(bDown,"South");
      add(bLeft,"West");
      add(bRight,"East");

      addWindowListener(this);
      setVisible(true);
   }


   public void windowClosing(WindowEvent e) {
      System.exit(1);
   }
   public void windowClosed(WindowEvent e) {}
   public void windowOpened(WindowEvent e) {}
   public void windowActivated(WindowEvent e) {}
   public void windowDeactivated(WindowEvent e) {}
   public void windowIconified(WindowEvent e) {}
   public void windowDeiconified(WindowEvent e) {}

   public void actionPerformed(ActionEvent e) {
      if (e.getSource() == bUp)
         cc.copyUp();
      else if (e.getSource() == bDown)
         cc.copyDown();
      else if (e.getSource() == bLeft)
         cc.copyLeft();
      else if (e.getSource() == bRight)
         cc.copyRight();
   }
}

class CopyAreaCanvas extends Component {
   Image iArea;

   public void setBounds(int x,int y,int w,int h) {
      iArea = null;
      super.setBounds(x,y,w,h);
      iArea = createImage(w,h);
      Graphics g = iArea.getGraphics();
      g.setColor(Color.white);
      g.fillRect(0,0,w-1,h-1);
      g.setColor(Color.black);
      g.drawLine(0,0,w-1,h-1);
      g.drawLine(w-1,0,0,h-1);
      g.dispose();
      repaint();
   }

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

   public void copyUp() {
      Dimension d = getSize();
      Graphics gr = iArea.getGraphics();

      gr.clipRect(10,10,d.width-20,d.height-20);

      // This will fail under Java 1.2 (works under Java 1.1)
      gr.copyArea(0,0,d.width,d.height,0,-5);
      gr.dispose();

      Graphics g = getGraphics();
      paint(g);
      g.dispose();
   }
   public void copyDown() {
      Dimension d = getSize();
      Graphics gr = iArea.getGraphics();

      gr.clipRect(10,10,d.width-20,d.height-20);

      // This will fail under Java 1.2 (works under Java 1.1)
      gr.copyArea(0,0,d.width,d.height,0,5);
      gr.dispose();

      Graphics g = getGraphics();
      paint(g);
      g.dispose();
   }
   public void copyLeft() {
      Dimension d = getSize();
      Graphics gr = iArea.getGraphics();

      gr.clipRect(10,10,d.width-20,d.height-20);

      gr.copyArea(0,0,d.width,d.height,-5,0);
      gr.dispose();

      Graphics g = getGraphics();
      paint(g);
      g.dispose();
   }
   public void copyRight() {
      Dimension d = getSize();
      Graphics gr = iArea.getGraphics();

      gr.clipRect(10,10,d.width-20,d.height-20);

      gr.copyArea(0,0,d.width,d.height,5,0);
      gr.dispose();

      Graphics g = getGraphics();
      paint(g);
      g.dispose();
   }
}

(Review ID: 99936)
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