hi,

i'm writing a textbox (extends JTextPane) witch can handle syntax
highlighting. i handle colorization with doc.setCharacterAttributes.
my textbox also supports undo/redo but the problem is, that the
colorization-steps are also made undoable (but they shouldn't)!

here's my code-snippet:

private UndoManager undo = new UndoManager();
...
private final class UndoHandler implements UndoableEditListener {

    public void undoableEditHappened(UndoableEditEvent e) {
        ...
        undo.addEdit(e.getEdit());
        ...
    }
}

i have to skip the undo.addEdit(..) line if "e.getEdit()" is a
DefaultStyledDocument.AttributeUndoableEdit (i think!).

i tried different ways i.e. :
if (!(e.getEdit() instanceof
DefaultStyledDocument.AttributeUndoableEdit)) {
    undo.addEdit(e.getEdit());
}

but anytime i press my undo button, first the color-changes and then
the insert-changes become undone!

has anyone an idea?

Mark

PS: sorry, for my poor english! :)