how to create Jcombobox with fixed width?

[Abhishek Reddy]

how to create Jcombobox with fixed width ? (irrespective of its elements width)

[Michael Dunn]

couple of things to try

comboBox.setPreferredSize(...)
comboBox.setPrototypeDisplayValue("XXXXXXXXXXXXXXXXXXXX");

[Abhishek Reddy]

thanks for the reply...

Its working, but the contents of the JComboBox are partially visible, is there any way to display the whole content...
I mean JComboBox width is fixed but its content should expand w.r.t contents length

[Michael Dunn]

comboBox.setPrototypeDisplayValue(widestItem);

[Abhishek Reddy]

thanks for the reply...i have done this way
comboBox.setPreferredSize(new Dimension(10,20))
comboBox.setPrototypeDisplayValue("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");

but still the content is not visible completely..

[Campbell Ritchie]

Preferred size 10, 20? You are lucky to see the combo box at all when it's that small!

[Abhishek Reddy]

leave the size.....
let me know, whether it is possible to display the entire content or not

[Michael Dunn]

comboBox.setPreferredSize(new Dimension(500,25));
OR//<---------------
comboBox.setPrototypeDisplayValue("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");

either, in conjunction with using a layoutManager, and both work fine

if they still don't work for you, post your code

[Maneesh Godbole]

Originally posted by Abhishek Reddy:
leave the size.....
let me know, whether it is possible to display the entire content or not

Abhiskek,

I don't think that was really nice on your part.
I understand, you might be rushed to get this thing done, or frustrated at not getting it right on your own, inspite of numerous attempts; all of us have been through that phase.

However, you need to remember, statements like these, might make people think twice before helping you out in the future. You need to be careful about such things buddy

[Abhishek Reddy]

iam sorry for that ....
thanks for the reply...............

here is the sample code

/*
 * ComboFrame.java
 *
 * Created on November 11, 2008, 5:00 PM
  */
 
package gui;
 
/**
 *
 * @author  Administrator
 */
public class ComboFrame extends javax.swing.JFrame {
 
    /** Creates new form ComboFrame */
    public ComboFrame() {
        initComponents();
    }
 
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
 
        jPanel1 = new javax.swing.JPanel();
        jPanel2 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jComboBox1 = new javax.swing.JComboBox();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
 
        jLabel1.setText("Department ");
 
//-----------------------------------------------//
 
        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" }));
 
        jComboBox1.setPrototypeDisplayValue(prototypeValue);
 
//-----------------------------------------//
 
        org.jdesktop.layout.GroupLayout jPanel2Layout = new org.jdesktop.layout.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(jPanel2Layout.createSequentialGroup()
                .add(21, 21, 21)
                .add(jLabel1)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED)
                .add(jComboBox1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 150, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(26, Short.MAX_VALUE))
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(jPanel2Layout.createSequentialGroup()
                .add(41, 41, 41)
                .add(jPanel2Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jLabel1)
                    .add(jComboBox1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(207, Short.MAX_VALUE))
        );
 
        org.jdesktop.layout.GroupLayout jPanel1Layout = new org.jdesktop.layout.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(jPanel1Layout.createSequentialGroup()
                .add(jPanel2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(org.jdesktop.layout.GroupLayout.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .add(jPanel2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );
 
        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(jPanel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 264, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(jPanel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
 
        pack();
    }// </editor-fold>
 
    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new ComboFrame().setVisible(true);
            }
        });
    }
 
    // Variables declaration - do not modify
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    // End of variables declaration
 
//------------------------------------------//
    private String prototypeValue="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
 
//-----------------------------------------//
}
  

look for the codes inside //---------------------------//

[Michael Dunn]

your problem is probably GroupLayout (which I don't use, and can't compile your code to confirm)

here's your code, stripped of all unnecessary stuff, leaving the frame as a default Borderlayout.

I've added another combobox (no prototype display), just for comparison,
and added a few extra XXX's to make it stand out

    
class ComboFrame extends javax.swing.JFrame {
    public ComboFrame() {
        initComponents();
    }
    private void initComponents() {
        String[] items = { "Item 1", "Item 2", "Item 3", "Item 4", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" };
        String prototypeValue="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
        javax.swing.JComboBox jComboBox1 = new javax.swing.JComboBox(new javax.swing.DefaultComboBoxModel(items));
        javax.swing.JComboBox jComboBox2 = new javax.swing.JComboBox(new javax.swing.DefaultComboBoxModel(items));
        jComboBox1.setPrototypeDisplayValue(prototypeValue);
        javax.swing.JPanel p1 = new javax.swing.JPanel();
        javax.swing.JPanel p2 = new javax.swing.JPanel();
        p1.add(jComboBox1);
        p2.add(jComboBox2);
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        add(p1,java.awt.BorderLayout.NORTH);
        add(p2,java.awt.BorderLayout.SOUTH);
        pack();
    }
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new ComboFrame().setVisible(true);
            }
        });
    }
}

compile/run the code, note the differing widths, then comment out the
setPrototypeDisplayValue line,
recompile/rerun and you'll notice the 'aaaaaa...' item fully displayed,
so it does appear GroupLayout is causing all your problems

[Abhishek Reddy]

thanks...for the reply
i have understood the usage of setPrototypeDisplayValue(prototypeValue);

But i want to display the JComboBox in the following way

----------
select |
-------------------------
item1|
item2|
item3|
item4|
aaaaaaaaaaaaaaaaaaaaaaaa|
-------------------------

[Abhishek Reddy]

----------
select |
-------------------------
item1 |
item2 |
item3 |
item4 |
aaaaaaaaaaaaaaaaaaaaaaaa|
-------------------------

[Michael Dunn]

OK, I think I know what you really want now.

search the sun forums and google for SteppedComboBox,
it matches exactly your description.

[Abhishek Reddy]

thanks for the reply.......

SteppedCombo Box!!!

i will search for it......