Name: abC81024 Date: 12/11/98


to reproduce
1.run TestCase.java
2.try to scroll vertically by means of the arrow keys
(the bug is not reproducible when mouse is using)
Notice, that ScrollPane content will be horizontally twitched during the scrolling.
 
=== TestCase.java ===
import java.awt.*;
import java.awt.event.*;

class TestCase extends Frame {

    KeyListener keys;
    ScrollPane pane;

    public TestCase() {
pane = new ScrollPane();
keys = new KeyAdapter() {
public void keyPressed(KeyEvent evt) {
Point pos = pane.getScrollPosition();
switch ( evt.getKeyCode() ) {
case KeyEvent.VK_UP:
pos.y-=20;
break;
case KeyEvent.VK_DOWN:
pos.y+=20;
break;
}
pane.setScrollPosition(pos);
}
};
pane.addKeyListener(keys);
this.addKeyListener(keys);

pane.add( new Canvas() {
public Dimension getPreferredSize() {
return new Dimension(200,10000);
}
public void paint(Graphics g) {
for(int i=0; i<10000; i+=20) {
g.drawString("String "+i,10,i);
}
}
});
Component[] comps = pane.getComponents();
for(int i=0; i< comps.length; i++) {
comps[i].addKeyListener(keys);
}
add(pane);
Adjustable adj = pane.getVAdjustable();
adj.setUnitIncrement(20);
    }
    public static void main(String[] args) {

TestCase tc = new TestCase();
tc.setSize(250,250);
System.out.println("Show window!");
tc.setVisible(true);
    }

};
=================

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