Re: How to prevent a long

"Daniel Pitts" <daniel.pitts@THRWHITE.remove-dii-this>
Wed, 27 Apr 2011 15:33:03 GMT
On Apr 4, 2:17 pm, wrote:

Hi All,

I want to have a long JLabel, but I dont want my entire dialog to be
sized based on this long JLabel -- I want the JLabel to wrap, & I want
the dialog size to be set by other controls.

So I want something like this if the control (for ex. a JTextField) is

A really really really really really long JLabel

And something like this if the JTextField is short:

A really really really
really really long

I found out that I need to use <html> tags to get the JLabel to wrap.
So that was one hurdle. Now, I almost got what I want with the
following code:

import javax.swing.*;
import java.awt.*;

public class x
        private static void createAndShowGUI()
                JFrame frame = new JFrame("test");

                // Change content pane to JPanel set to BoxLayout
                JPanel framePanel = new JPanel();
                framePanel.setLayout(new BoxLayout(framePanel, BoxLayout.Y_AXIS));

                JLabel label = new JLabel("<html>Here is a label. It can get to be
very very very long aaaaaaa bbbbbbbbbbbbbbbb ccc dd eeeeeeee ffffff
gggggggggg hhhh.</html>");

                //frame.add(new JTextField(80));
                frame.add(new JTextField(10));

                label.setPreferredSize(new Dimension(0, 100));


        public static void main(String[] args)
                        new Runnable() {
                                public void run() { createAndShowGUI(); }


With this, I can get the effect I want. To see it, I change the size
of the JTextField. JTextField(10) -- it wraps. JTextField(80) -- it
doesnt wrap. Thats good.

I got it to work like this with this line:
label.setPreferredSize(new Dimension(0, 100));

The problem is the height. For the width, I can use '0' and it will
size correctly. I cant do the same with height. If I set it to '0' (or
-1, 1, 2, etc) then thats the height it uses. With '100', its ok when
the text field is small, but when its big, theres too much vertical
space around the label.

I dont know how to say:
   'set a preferred width, but leave the preferred height alone'

  'set preferred width to 0 (and you'll later re-adjust that),
  and set preferred height to the height after you've wrapped it'

I had originally used <br> tags to force the wrapping myself, but
later found out my gui looks bad when Windows is set to 120 DPI. So I
basically want to avoid all hard coded sizes, or line breaks.


It depends on the layout manager being used.
You COULD set maximum size on the label though.

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