Name: tb29552 Date: 11/03/98


/*

HI,
I am using Swing-1.1beta3 and JDK 1.1.7.

I have a JTextArea that is placed in a JScrollPane. My problem
is that I cannot get the current number of lines from my
JTextArea when wrapped lines are used. I try to use the
getLineCount() method, but it only counts "\n" characters.

The automatic new lines inserted due to the use of wrapped
lines are not counted, Why?. It is only when I press "Carriage
return" the lineCount is increased.

In my case, I want to use wrapped lines so the user does not have
to press "carriage return". I also want to know exactly the
current number of lines (no matter how they where inserted).

How can I find out how many lines the text
was wrapped into? (this should equal the number
of \n characters PLUS any extra wraps the JTextArea
added.)

 */
//
import javax.swing.*;
import java.awt.*;
class WrapLineCount extends JFrame {
    static final String testText =
    "HI,\nI am using Swing-1.1beta3 " +
    "and JDK 1.1.7. I have a " +
    "JTextArea that is placed in a " +
    "JScrollPane. My problem is " +
    "that I cannot get the current " +
    "number of lines from my " +
    "JTextArea when wrapped lines " +
    "are used. I try to use the " +
    "getLineCount() method, but it " +
    "only reports \"1\" - the " +
    "automatic new lines inserted " +
    "due to the use of wrapped " +
    "lines are not counted, " +
    "Why?. It is only when I press " +
    "\"Carriage return\" the " +
    "lineCount is increased.\n In " +
    "my case, I want to use wrapped " +
    "lines so the user does not " +
    "have to press \"carriage " +
    "return\". I also want to know " +
    "exactly the current number of " +
    "lines (no matter how they " +
    "where inserted).\n This is the " +
    "java code for the creation of " +
    "my JScrollPane and my " +
    "JTextArea:";

    public static void outputMessage() {
        System.out.println("java.version = " +
                           System.getProperty("java.version"));
        System.out.println("Operating System Name = " +
                           System.getProperty("os.name"));
        System.out.println("Operating system architecture = " +
                           System.getProperty("os.arch"));
        System.out.println("Operating system version = " +
                           System.getProperty("os.version") + "\n");
    }

    WrapLineCount () {
        super();
        // Creation of JScrollPane
        JScrollPane connectedUserScrollPane = new JScrollPane();
        connectedUserScrollPane.setOpaque(true);
        connectedUserScrollPane.setHorizontalScrollBarPolicy
            (ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        connectedUserScrollPane.setBounds(12, 24, 268, 241);
        connectedUserScrollPane.setFont(new Font("Dialog", Font.PLAIN, 12));
        connectedUserScrollPane.setForeground(new Color(0));
        connectedUserScrollPane.setBackground(new Color(-3355444));
        getContentPane().add(connectedUserScrollPane);

        // Creation of JTextArea

        JTextArea connectedUserTextArea = new JTextArea();
        connectedUserTextArea.setMargin(new java.awt.Insets(0, 0, 0, 0));
        connectedUserTextArea.setBounds(0, 0, 268, 241);
        connectedUserTextArea.setFont(new Font("Dialog", Font.PLAIN, 12));
        connectedUserTextArea.setForeground(new Color(0));
        connectedUserTextArea.setBackground(new Color(16777215));
        connectedUserTextArea.setLineWrap(true);
        connectedUserTextArea.setWrapStyleWord(true);
        connectedUserScrollPane.getViewport().add(connectedUserTextArea);

        int lines = connectedUserTextArea.getLineCount();
        System.out.println("Lines on empty: " + Integer.toString(lines));
        connectedUserTextArea.append(testText);
        System.out.println("Lines on 1: " +
                           connectedUserTextArea.getLineCount());
        pack();
        setVisible(true);
    }
    public static void main(String[] args) {
        outputMessage();
        WrapLineCount wlc = new WrapLineCount ();
    }
}

(Review ID: 41948)
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