A long text in one line, setLineWrap(true) does not work

[zachary-guo]

There is a paragraph in one line, but the textarea' s width is some limit, I try to setLineWrap(true) to make it wrap, but it does not work. The whole paragraph is still in one line and there is a long y-scroll bar.

How can make auto wrap work?

[bobbylight]

Can you provide a small example application that demonstrates this behavior?

[jzwolak]

I'm having the same problem. Here is an example to reproduce. Using RSyntaxTextArea 2.5.8: compile 'com.fifesoft:rsyntaxtextarea:2.5.8'

import org.fife.ui.rsyntaxtextarea.RSyntaxTextArea;

import javax.swing.*;

public class WrapTest {
    public static void main( String[] args ) throws Exception {
        SwingUtilities.invokeAndWait(()->{
            RSyntaxTextArea textArea = new RSyntaxTextArea("r-syntax with a long line that should wrap",3,10);
            //JTextArea textArea = new JTextArea("j-text with a long line that should wrap",3,10);
            textArea.setLineWrap(true);
            JPanel panel = new JPanel();
            panel.add(textArea);
            JFrame frame = new JFrame("test line wrap");
            frame.setContentPane(panel);
            frame.pack();
            frame.setVisible(true);
        });
    }
}

[bobbylight]

This seems to be related to the layout of your content pane. This fixes it:

JPanel panel = new JPanel(new BorderLayout());

Alternatively, keep the default content pane (which I think has BorderLayout installed by default, IIRC):

frame.getContentPane().add(new JScrollPane(textArea));

[jzwolak]

Switching to BorderLayout does hide the problem. I would consider this a work around solution. I may not be able to use this solution in my production environment, but I'll try.

The code example I gave also has a JTextArea that is commented out. If you comment out the RSyntaxTextArea and uncomment the JTextArea then you'll see my code example works and the line is wrapped. I interpret this as RSyntaxTextArea deviating from the contract for setLineWrap since RSyntaxTextArea is subclassing JTextArea and has changed the behavior of JTextArea in a way that isn't adding a feature or functionality but is instead a side effect or bug.

How do you interpret this change in behavior from JTextArea's line wrap to RSyntaxTextArea? Was it intended? Is there something I'm missing?

[bobbylight]

You're right, we should work if JTextArea works. I'll reopen.