Name: gm110360 Date: 06/22/2004


FULL PRODUCT VERSION :
java version "1.5.0-beta2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta2-b51)
Java HotSpot(TM) Client VM (build 1.5.0-beta2-b51, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows 2000 [Version 5.00.2195]

A DESCRIPTION OF THE PROBLEM :
JViewport.setViewPosition does not work on invalid components

When a component within a JScrollpane has been enlarged and hence is no longer valid, JViewport.setViewPosition incorrectly assumes that the Pane has been validated before it gets called. As a result it is changing the view position to be within the old invalid sizes.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run code

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
the button text to be shown in the top left corner of the scroll pane (position 500, 500) of the button (like what would be shown with the line pane.validate(); uncommented
ACTUAL -
the view position has not been changed at all, it is almost at position 0,0

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.*;
import javax.swing.*;

public class Test {
  public static void main(String s[]) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    final JButton button = new JButton("Some Text");
    final JScrollPane pane = new JScrollPane(button);
    frame.add(pane);
    frame.setSize(200, 200);
    frame.setVisible(true);
    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        button.setPreferredSize(new Dimension(1000, 1000));
        //pane.validate();
        pane.getViewport().setViewPosition(new Point(500, 500));
      }
    });
  }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
add the line pane.validate(); in every time before setViewPosition is called as shown in the source code
(Incident Review ID: 280956)
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