Scaleable Swing components

Hello!

The following problem troubles me already for hours:

I would like to use scaleable TextPanes in my graphical editor adapting
the global scaling.
MyTextPane inherites from JTextPane and overrides the paintComponent method.

        public void paintComponent(Graphics g) {
            Graphics2D g2d = (Graphics2D) g.create();
            AffineTransform at = new AffineTransform();
            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);
            at.scale(getTransform().getScaleX(), getTransform().getScaleY());
            g2d.transform(at);
            super.paintComponent(g2d);
            g2d.dispose();
        }

The following behavior disturbs:

* the cursor doesn't flash
* the cursor position isn't accurate any longer (e.g. iiiii | )
* selected text is shown at a shifted position
* the component is larger than the drawn area
   (noticeable with the background; a vertically centered text field
    disappears completely)
* size/position of text and node should be updated with panning and
zooming or growing of the input

who can make me lucky?

Jens