JTextArea Rotation & WordWrap -- Challenging issue.

[Sainath Veepuri]

Hi all,

My aim is to rotate the text on a JTextarea. With the below code I could do the rotation. But now the problem is that I'am unable to set wordwrapping on the same as I have overriden the paintComponent method. It just puts everything in one line.

String sText = "I have changed your graphics. How can I set the wordwrapping on you ?";

JTextArea jTextArea = new JTextArea(){
public void paintComponent(Graphics g) {

super.paintComponent(g);

Graphics2D g2d = (Graphics2D) g;
g2d.translate( getWidth()/2, getHeight() );
g2d.rotate( Math.toRadians(270) );

g2d.drawString(sText, 0, 0);

}
};

We have got a release and I'am stuck with this.
Any suggestions would be greatly helpful.

Thankyou,
Sainath Veepuri

[todd runstein]

Ouch. You're going to need to break the lines and do the wrapping yourself. You should be able to use a LineBreakMeasurer to determine where to break each line. Instead of drawing strings, you'll be working with TextLayout objects. It's a bit more work, but you'll have all the flexibility you need.

Take a look at the Java2D tutorial on text: http://java.sun.com/developer/onlineTraining/Media/2DText/style.html

[Sainath Veepuri]

hi todd runstein,
Thanks a bunch for your suggestion
I was worried since no one was responding to my query even in the sun forum
web page

I'am amazed to see your response.
Yes, I will try that out by reading the link.
Thanks to javaranch,
Thanks to you again,
Sai.:-)

[Brian Cole]

It's challenging to do this "right" but it's
not so tough to do something quick and dirty
that can break lines on its own.

public class RotatedTextArea extends JTextArea {
 
  /** override paintComponent() to rotate -- works well only if square
   *  @author Brian Cole 2005 */
  public void paintComponent(Graphics g) {
    double angle = -Math.PI/2;
    double mid = Math.min(getWidth(), getHeight())/2.0;
    Graphics2D g2d = (Graphics2D)g;
 
    g2d.rotate(angle, mid, mid);
    super.paintComponent(g2d);
    g2d.rotate(-angle, mid, mid);
  }
 
  public static void main(String argv[]) {
    JTextArea rta = new RotatedTextArea();
    rta.setPreferredSize(new Dimension(200, 200));
    rta.setLineWrap(true);
    rta.setWrapStyleWord(true);
    rta.setText("This is a test of the emergency broadcast system. "
               +"This is only a test.");
 
    JFrame f = new JFrame("RotatedTextArea");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(rta, BorderLayout.CENTER);
    f.pack();
    f.setVisible(true);
  }
 
}

[Sainath Veepuri]

Hi Brian Cole,
Thank you.
Your code simply has made my life much easier. It works!
I never thought it was so easy.
Thankyou again,
Sai.