Name: ooR10001 Date: 11/13/2000


Method revalidate() in class javax.swing.JComponent is not called automatically when
size or location of the component is changed. The following test showing this bug:
--------------------------------------
import javax.swing.JButton;
import javax.swing.JFrame;

class JRStub extends JButton {

    boolean revalidateCalled = false;

    public JRStub() {
        super();
    }

    public synchronized void revalidate() {
        super.revalidate();
        revalidateCalled = true;
        notifyAll();
    }

    public synchronized void waitValidate() {
        try {
            wait(5000);
        } catch (InterruptedException ie) {
        }
    }

    public void resetValidate() {
        revalidateCalled = false;
    }

}

public class t {

  public static void main(String[] args) {
      JFrame f = new JFrame();
      JRStub c = new JRStub();
      f.getContentPane().add(c);
      f.setVisible(true);
      c.waitValidate();

      c.resetValidate();
      c.setSize(new java.awt.Dimension(c.getSize().width + 1,
                                       c.getSize().height + 1));
      c.waitValidate();
      if (!c.revalidateCalled) {
          System.out.println("revalidate() is not called when the size"
                             + " of component is changed");
      }

      c.resetValidate();
      c.setLocation(c.getLocation().x + 1, c.getLocation().y);
      c.waitValidate();
      if (!c.revalidateCalled) {
          System.out.println("revalidate() is not called when the location"
                             + " of component is changed");
      }

      f.dispose();
  }

}
-----------------------------------------
Test's output:
------------------------------
revalidate() is not called when the size of component is changed
revalidate() is not called when the location of component is changed
------------------------------

The javadoc says:
-----------------------------------------
revalidate

public void revalidate()

      Supports deferred automatic layout.
..................................................

      This method will automatically be called on this component when a property
      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
value changes such that size, location, or internal layout of this component has
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
been affected. This automatic updating differs from the AWT because programs
^^^^^^^^^^^^^^
generally no longer need to invoke validate to get the contents of the GUI to update.
-----------------------------------------

The implementation needs to be fixed for matching the spec.

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