Default Focus in JOptionPane Dialog

[Gajesh Tripathi]

When I run function showPasswordDialog(...) then default focus is OK button where as I want default focus password text field.

Please see the comment = //DOES NOT WORK
Kindly modify my code such that it works properly.

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

class TestShowPwdDialog {
    /*
     * Prompts the user for input a password with icon in a blocking dialog where the initial value, dialog title canbe specified.
     * User can input password which is required for further processing, usually by means of a <code>JTextField</code>.
     * <code>initalValue</code> is the initial value that can be used in cased of Saved Password
     * @return user's input password, or <code>null</code> meaning the user canceled the input
     */
    public static String showPasswordDialog(Frame owner,String message,String initialValue,String title) {
        final JPasswordField pField = new JPasswordField(20);
        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();
        final JPanel pPanel;
        
        c.insets.top = 4;
        c.insets.bottom = 4;
	pField.setText(initialValue);
        pPanel = new JPanel(gridbag);
        pPanel.setBorder(BorderFactory.createEmptyBorder(10, 20, 5, 20));
        c.anchor = GridBagConstraints.WEST;
        pPanel.add(new JLabel(message),c);
        pField.addFocusListener(new FocusListener() {
        	public void focusLost(FocusEvent fe) {
        		pField.setBackground(Color.white);
        	}
        	public void focusGained(FocusEvent fe) {
        		pField.setBackground(Color.yellow);
        	}
        });
        c.gridy=1;
        pPanel.add(pField,c);
        pPanel.requestFocusInWindow(); //DOES NOT WORKS
        int result = JOptionPane.showConfirmDialog(owner, pPanel,title,JOptionPane.OK_CANCEL_OPTION);
        if (result == JOptionPane.OK_OPTION)
            return String.valueOf(pField.getPassword());
        return null;
    }
    public static void main(String []args) {
	System.out.println(showPasswordDialog(null,"Enter user password:",null,"User Password"));
   }
}

[Gajesh Tripathi]

Eranga wrote:

Please don't post the same thread multiple times. I've close this.

SORRY! Due to network failure for some moment on my system, I could not predict that my thread already has been post. So I post it again. Dear Eranga, kindly delete the same thread that has been closed by you (if possible).

My question (using this thread) is that how to change default focus behaviour of dialog that is displayed using JOptionPane.showMessageDialog(...) function? Thanks.
This thread is continue from my previous thread JPasswordTextField using JOptionPane

[zweibieren]

A little looking around reveals that
JOptionPanel is NOT intended for displaying a password prompt.

A lot of poking around and experimental coding shows that
one can get the desired result:

	JButton okButton = new JButton("OK") {
	@Override
	public void requestFocus() {  
			pPanel.requestFocusInWindow();
		}
	};		
	Object[] possibleValues = {okButton, "Cancel"};
	Object selectedValue = JOptionPane.showOptionDialog(null,
		pPanel, "Input Password",
		JOptionPane.OK_CANCEL_OPTION,
		JOptionPane.QUESTION_MESSAGE, null,
		possibleValues, null);

[zweibieren]

Yet more looking around found Java bug 4813436.
It reveals the undocumented fact that

Object[] possibleValues = {okButton, "Cancel"};

displays an OK button that does nothing when clicked.

Yet further experimentation revealed the power of
subclassing JOptionPane instead of using one of the static methods.
The final breakthrough was to note that pField should get input focus instead of pPanel.

The following actually works.

	 JOptionPane pane = new JOptionPane(pPanel, 
			 JOptionPane.QUESTION_MESSAGE,
			 JOptionPane.OK_CANCEL_OPTION)  {
		@Override
		 public void selectInitialValue() {
			 pField.requestFocusInWindow();  // (not pPanel)
		 }
	 };
	 pane.createDialog(null, title).setVisible(true);

	 Object selectedValue = pane.getValue();
	 if (selectedValue == null)
		 return null;
	 int choice = ((Integer)selectedValue).intValue();
	 System.out.println("Selected: "+choice);
	 if (choice == JOptionPane.OK_OPTION) {
		 char [] pw =  pField.getPassword();
		 System.out.print("Password: ");
		 for (char ch : pw)
			 System.out.print(ch);
		 System.out.println();
		 // getPassword() recommends clearing the password after use
		 // of course, in this demo it has not yet been "used"
		 for (int cx = 0; cx < pw.length; cx++)
			 pw[cx] = 0;
	 }

[Gajesh Tripathi]

Thanks zweibieren
Problem is solved using idea following given by you...

JButton okButton = new JButton("OK") {
	@Override
	public void requestFocus() {  
			pPanel.requestFocusInWindow();
		}
	};

Thank you very much...

My modified code is pasted here. Following two things should be noted:-

1. If we use above idea then we are not allowed to get focus on ok button
   To allow this we modify it as follow:-
   

   JButton okButton = new JButton("OK") {
       boolean firstTimeFocuss=true;
       @Override
       public void requestFocus() {
           if(firstTimeFocuss) {
   	pPanel.requestFocusInWindow();
               firstTimeFocuss=false;
           }		   			
           super.requestFocus();
       }
   };

   But your following logic is great:-
   JOptionPane pane = new JOptionPane(pPanel,
   JOptionPane.QUESTION_MESSAGE, JOptionPane.OK_CANCEL_OPTION) {
   @Override
   public void selectInitialValue() {
   pField.requestFocusInWindow(); // (not pPanel)
   }
   };

1. We need to use dispose dialog manually ohterwise application will not be terminated if you run this program (I run it in JCreator)

here is source code:-

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

class TestShowPwdDialog {
    /*
     * Prompts the user for input a password with icon in a blocking dialog where the initial value, dialog title canbe specified.
     * User can input password which is required for further processing, usually by means of a <code>JTextField</code>.
     * <code>initalValue</code> is the initial value that can be used in cased of Saved Password
     * @return user's input password, or <code>null</code> meaning the user canceled the input
     */
    public static String showPasswordDialog(Frame owner,String message,String initialValue,String title) {
        final JPasswordField pField = new JPasswordField(20);
        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();
        final JPanel pPanel;
        
        c.insets.top = 4;
        c.insets.bottom = 4;
	pField.setText(initialValue);
        pPanel = new JPanel(gridbag);
        pPanel.setBorder(BorderFactory.createEmptyBorder(10, 20, 5, 20));
        c.anchor = GridBagConstraints.WEST;
        pPanel.add(new JLabel(message),c);
        pField.addFocusListener(new FocusListener() {
        	public void focusLost(FocusEvent fe) {
        		pField.setBackground(Color.white);
        	}
        	public void focusGained(FocusEvent fe) {
        		pField.setBackground(Color.yellow);
        	}
        });
        
        c.gridy=1;
        pPanel.add(pField,c);
        pPanel.requestFocusInWindow(); //DOES NOT WORKS
        JButton okButton = new JButton("OK") {
			boolean firstTimeFocuss=true;
			@Override
			public void requestFocus() {
		   		if(firstTimeFocuss) {
		   			pPanel.requestFocusInWindow();
		   			firstTimeFocuss=false;
		   		}		   			
		   		super.requestFocus();
		   	}
		};
       Object[] possibleValues = {okButton, "Cancel"};
        JOptionPane pane=new JOptionPane(pPanel, JOptionPane.QUESTION_MESSAGE);
        pane.setOptions(possibleValues);
        
        final JDialog jd=pane.createDialog(owner,title);
		pField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae)	 {
				jd.setVisible(false)	;
			}
		});
		okButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				jd.setVisible(false);
			}		
		});
		jd.setVisible(true);
       Object selectedValue = pane.getValue();
       /*if(selectedValue!=null)
       		System.out.println (selectedValue+"="+selectedValue.getClass());*/
        jd.dispose();
        //int result = JOptionPane.showConfirmDialog(owner, pPanel,title,JOptionPane.OK_CANCEL_OPTION);        
        if (selectedValue!=null && selectedValue.equals("uninitializedValue"))
            return String.valueOf(pField.getPassword());
        return null;
    }
    public static void main(String []args) {
    	//arguments are: owner,message,initialValue,title
		System.out.println(showPasswordDialog(null,"Enter user password:",null,"User Password"));
   }
}

Above code should be modify such that "pField should get input focus instead of pPanel" and "getPassword() recommends clearing the password after use" as suggested by zweibieren.

[zweibieren]

Please accept my apologies for sending you down a wrong path.
My more recent post--overriding JOptionPane.selectInitialValue()--would have been briefer.
Even better would have been to use JDialog directly.