Printing a JComponent, but it doesn't scale to fit the papers size

Question

Hello all,
I derived a class "GraphPanel" from "JPanel" and did some simple graphics in the paint()-Method.
The paint-Method uses the getSize().width and height-properties so that the lines and images it draws always scale to the components size. This works fine.
The class GraphPanel also implements the Printable-Interface and I implemented the print-Method as follows:
    public int print(Graphics g, PageFormat pf, int page) throws PrinterException {
        if (page > 0) {
            return NO_SUCH_PAGE;
        Graphics2D g2d = (Graphics2D)g;
        g2d.translate(pf.getImageableX(), pf.getImageableY());
        AffineTransform at = new AffineTransform(pf.getMatrix());
        g2d.transform(at);
        this.print(g);
        return PAGE_EXISTS;      
    } // printI wanted the JPanel to be print out: scaled over all the papers' size (no matters if this means shrinking or blowing up the drawings).
The result wasn't what I expected: the size of the printing depends on the size of the JPanel at the screen :-(
Please can anybody give me a hint for doing this scaling?
Thanks a lot,
Thorsten

Answer 1

What if you add this line
g2d.scale( pf.getImageableWidth()/getWidth() , pf.getImageableHeight()/getHeight() );just before you print
this.print(g);