userPrompt.java

package guiUtilities;
import javax.swing.JOptionPane;
import javax.swing.JDialog;
//import javax.swing.JPasswordField;
import javax.swing.JTextField;
import java.beans.*; //Property change stuff
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;
import javax.swing.JComboBox;

public class userPrompt extends JDialog {

    private JOptionPane optionPane;
    private JComboBox iMenu;
    private boolean menuIsValid;

    public String getValidatedText() {
        String returnString="None";
        if(menuIsValid) returnString = (String)iMenu.getSelectedItem();
        return returnString;
    }


    public int getValidatedIndex() {
        int returnValue=-1;
        if(menuIsValid) returnValue = iMenu.getSelectedIndex();
        return returnValue;
    }    
  public userPrompt(Frame aFrame,String iName, String type, Vector menuItems) {
// iName is supplied institute name or supplied username
// type is 'Institute' or 'Username' depending on context
        super(aFrame, true);

        setBackground(java.awt.Color.white);
//        final String msgString1 = "Enter "+type
        final String msgString2 = "Select "+type+":";
        iMenu = new JComboBox(menuItems);
        iMenu.setSelectedItem(iName);
        Object[] array = {msgString2, iMenu};

        final String btnString1 = "Enter";
        final String btnString2 = "Cancel";
        Object[] options = {btnString1, btnString2};

        optionPane = new JOptionPane(array, 
                                    JOptionPane.QUESTION_MESSAGE,
                                    JOptionPane.YES_NO_OPTION,
                                    null,
                                    options,
                                    options[0]);
        setContentPane(optionPane);
        setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
        addWindowListener(new WindowAdapter() {
                public void windowClosing(WindowEvent we) {
                /*
                 * Instead of directly closing the window,
                 * we're going to change the JOptionPane's
                 * value property.
                 */
                    optionPane.setValue(new Integer(
                                        JOptionPane.CLOSED_OPTION));
            }
        });


        optionPane.addPropertyChangeListener(new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent e) {
                String prop = e.getPropertyName();

                if (isVisible() 
                 && (e.getSource() == optionPane)
                 && (prop.equals(JOptionPane.VALUE_PROPERTY) ||
                     prop.equals(JOptionPane.INPUT_VALUE_PROPERTY))) {
                    Object value = optionPane.getValue();

                    if (value == JOptionPane.UNINITIALIZED_VALUE) {
                        //ignore reset
                        return;
                    }

                    // Reset the JOptionPane's value.
                    // If you don't do this, then if the user
                    // presses the same button next time, no
                    // property change event will be fired.
                    optionPane.setValue(
                            JOptionPane.UNINITIALIZED_VALUE);

                    if (value.equals(btnString1)) {
                        menuIsValid=true; 
                    } else { // user closed dialog or clicked cancel
                        menuIsValid=false;
                    }
                   setVisible(false);
                }
            }
        });
    }
}

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