So, I have JTextArea on a JPanel (BoxLayout). I also have Box filler that fills the rest of the JPanel. I need my JTextArea to start of with single-line-height (I can manage that), and to expand and reduce when that is needed.
Word wrap is enabled, I just need it to adjust it's height when new line is added/removed.
I tried with documentListener and getLineCount(), but it doesn't recognize wordwrap-newlines.
I'd like to avoid messing with the fonts if it's possible.
And, NO SCROLL PANES. It's essential that JTextArea is displayed fully at all times.
JTextArea
has a rather particular side effect, in the right conditions, it can grow of it's own accord. I stumbled across this by accident when I was trying to set up a simple two line text editor (restricted characters length per line, with a max of two lines)...
Basically, given the right layout manager, this component can grow of it's own accord - it actually makes sense, but took me by surprise...
Now in addition, you may want to use a ComponentListener
to monitor when the component changes size, if that's what you're interested...
public class TestTextArea extends JFrame {
public TestTextArea() {
setLayout(new GridBagLayout());
JTextArea textArea = new JTextArea();
textArea.setColumns(10);
textArea.setRows(1);
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);
add(textArea);
setSize(200, 200);
setLocationRelativeTo(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
textArea.addComponentListener(new ComponentAdapter() {
@Override
public void componentResized(ComponentEvent ce) {
System.out.println("I've changed size");
}
});
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
new TestTextArea();
}
}