Name: jk109818 Date: 03/27/2003


FULL PRODUCT VERSION :
java version "1.4.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)

FULL OPERATING SYSTEM VERSION :
OS-independent

ADDITIONAL OPERATING SYSTEMS :
OS-independent

A DESCRIPTION OF THE PROBLEM :
Look at the source code of JEditorPane.getPreferredSize().
It overrides preferred size calculation if the parent is a
JViewport, but only then. This creates two bad problems:

1) the behavior that this override is supposed to fix (see
extensive comment in the source code for this method) still
occurs if the JEditorPane is contained inside, say, a
JPanel, which in turn, is contained in the JViewPort. This
is a clearly a bug as the desired resizing does not work then.

2) For all practical purposes, JEditorPanes can never be
shrunk again after they have been enlarged!! To reproduce,
see below.

I suggest that the overridden code in
JEditorPane.getPreferredSize() is a bad fix that creates
more problems than it solves. I'm not an expert enough in
Swing internals to suggest a good fix, but at this "fix" is
clearly not a good one and needs to be undone.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) run a JEditorPane inside a JScrollPane (scrollbars as
   needed) with just a bit of text so that the JScrollPane
   does not show its scrollbars.
2) now enlarge the enclosing JFrame using the mouse.
3) now shrink the enclosing JFrame to the approx.
   previous size. You will see the scrollbar still being
   there, because the JViewPort still has the large size
   and did not resize back to the previous size. Note that
   because there is only little text in the JEditorPane,
   it has no business remaining large.

EXPECTED VERSUS ACTUAL BEHAVIOR :
I expect the resizing behavior of JEditorPane to be
identical to the resizing behavior of JTextArea. It is not
-- in fact, it is clearly broken as it never gets smaller again.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
  From the implementation of JEditorPane.getPreferredSize() in the JDK:


    public Dimension getPreferredSize() {
Dimension d = super.getPreferredSize();
if (getParent() instanceof JViewport) { // <- This if shall not be here
JViewport port = (JViewport)getParent();
TextUI ui = getUI();
            int prefWidth = d.width;
            int prefHeight = d.height;
if (! getScrollableTracksViewportWidth()) {
int w = port.getWidth();
Dimension min = ui.getMinimumSize(this);
if (w != 0 && w < min.width) {
                    // Only adjust to min if we have a valid size
...
---------- END SOURCE ----------
(Review ID: 180999)
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