Rotating entire JFrame to simulate portrait mode

Question

Hi
I need to rotate the entire jframe into portrait mode.
I cannot use the graphics chip, or linux graphics device manger to change the rotation CW 90 degress - due to hardware design and limitation.
So basically, I have to render the graphics myself, quite easily done with fllowing code at the the top level panel.
protected void paintComponent(Graphics g)
// center of rotation is center of the panel
Graphics2D g2d =(Graphics2D)g;
int xRot = this.getWidth() / 2;
int yRot = this.getHeight() / 2;
g2d.rotate(Math.toRadians(-90), xRot, yRot);
super.paintComponent(g);
This does the job nicely, however the screen is still using landscape co-ordinates, and hence when clicking on the swing components they are in the pre-rotation position.
I have looked and cannot find, is there a simple way to switch a jframe into portrait mode. If not, is there a simple way to intercept the screen coordinates and translate the mouse coordinates to the appropriate JComponent?
thanks in advance
Steve

Answer 1

import java.awt.*;
import java.awt.event.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.util.ArrayList;
import java.util.List;
import javax.swing.*;
public class TransformPoints extends JPanel {
    List<PointStore> list = new ArrayList<PointStore>();
    AffineTransform at = new AffineTransform();
    String s = "Hello World";
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        Color color = g2.getColor();
        drawPoints(g2);
        g2.setPaint(color);
        FontRenderContext frc = g2.getFontRenderContext();
        Font font = g2.getFont().deriveFont(36f);
        Graphics2D copy = (Graphics2D)g.create();
        copy.setFont(font);
        LineMetrics lm = font.getLineMetrics(s, frc);
        float height = lm.getAscent() + lm.getDescent();
        float width = (float)font.getStringBounds(s, frc).getWidth();
        int w = getWidth();
        int h = getHeight();
        System.out.printf("w: %d  h: %d%n", w, h);
        float x = (w - width)/2;
        float y = (h - height)/2 + lm.getAscent();
//        copy.rotate(-Math.PI/2, w/2, h/2);
        at.setToRotation(-Math.PI/2, w/2, h/2);
        copy.transform(at);
        copy.drawString(s, x, y);
        // draw some reference lines
        copy.setPaint(Color.pink);
        copy.draw(getBounds());
        copy.drawLine(w/2, 0, w/2, h);
        copy.drawLine(0, h/2, w, h/2);
        copy.dispose();
    private void drawPoints(Graphics2D g2) {
        for(int i = 0; i < list.size(); i++) {
            PointStore store = list.get(i);
            Point p = store.loc;
            g2.setPaint(Color.blue);
            g2.drawString(store.viewLoc, p.x+3, p.y);
            g2.setPaint(Color.red);
            g2.drawString(store.xformLoc, p.x+3, p.y+12);
            g2.fill(new Ellipse2D.Double(p.x-1.5, p.y-1.5, 4, 4));
    public static void main(String[] args) {
        TransformPoints test = new TransformPoints();
        JFrame f = new JFrame("click me");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(test);
        f.setSize(500,300);
        f.setLocation(100,100);
        f.setVisible(true);
        test.addMouseListener(test.ml);
    private MouseListener ml = new MouseAdapter() {
        public void mousePressed(MouseEvent e) {
            Point p = e.getPoint();
            String viewStr = String.format("[%d, %d]", p.x, p.y);
            Point2D.Double xp = getInvertedPoint(p);
            String xfStr = String.format("[%.1f, %.1f]", xp.x, xp.y);
            list.add(new PointStore(p, viewStr, xfStr));
            repaint();
        private Point2D.Double getInvertedPoint(Point2D p) {
            Point2D.Double xp = new Point2D.Double();
            if(at.getDeterminant() != 0) {
                try {
                    at.inverseTransform(p, xp);
                } catch(NoninvertibleTransformException  e) {
                    System.out.println("invert error: " + e.getMessage());
            return xp;
class PointStore {
    Point loc;
    String viewLoc;
    String xformLoc;
    public PointStore(Point p, String view, String xform) {
        loc = p;
        viewLoc = view;
        xformLoc = xform;
}