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/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package dynamicfields;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JPanel;
import javax.swing.JTextField;
/**
*
* @author ndunn
*/
public class Entry extends JPanel {
private JComboBox comboBox;
private JTextField textField;
private JButton plus;
private JButton minus;
private EntryList parent;
public Entry(JComboBox comboBox, String textFieldText, EntryList list) {
this.comboBox = comboBox;
this.parent = list;
this.plus = new JButton(new AddEntryAction());
this.minus = new JButton(new RemoveEntryAction());
this.textField = new JTextField(10);
this.textField.setText(textFieldText);
add(this.plus);
add(this.minus);
add(this.comboBox);
add(this.textField);
}
public JComboBox getComboBox() {
return comboBox;
}
public class AddEntryAction extends AbstractAction {
public AddEntryAction() {
super("+");
}
public void actionPerformed(ActionEvent e) {
parent.cloneEntry(Entry.this);
}
}
public class RemoveEntryAction extends AbstractAction {
public RemoveEntryAction() {
super("-");
}
public void actionPerformed(ActionEvent e) {
parent.removeItem(Entry.this);
}
}
public void enableAdd(boolean enabled) {
this.plus.setEnabled(enabled);
}
public void enableMinus(boolean enabled) {
this.minus.setEnabled(enabled);
}
}
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package dynamicfields;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JComboBox;
import javax.swing.JPanel;
/**
*
* @author ndunn
*/
public class EntryList extends JPanel{
private List<Entry> entries;
// Replace with your database stuff
private static final String[] comboBoxEntries = {"Test","Two","Three"};
public EntryList() {
this.entries = new ArrayList<Entry>();
Entry initial = new Entry(new JComboBox(comboBoxEntries), "", this);
addItem(initial);
}
public void cloneEntry(Entry entry) {
Object selected = entry.getComboBox().getSelectedItem();
JComboBox copy = new JComboBox(comboBoxEntries);
copy.setSelectedItem(selected);
Entry theClone = new Entry(copy, "", this);
addItem(theClone);
}
private void addItem(Entry entry) {
entries.add(entry);
add(entry);
refresh();
}
public void removeItem(Entry entry) {
entries.remove(entry);
remove(entry);
refresh();
}
private void refresh() {
revalidate();
if (entries.size() == 1) {
entries.get(0).enableMinus(false);
}
else {
for (Entry e : entries) {
e.enableMinus(true);
}
}
}
}
package dynamicfields;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
*
* @author ndunn
*/
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
JFrame frame = new JFrame();
EntryList panel = new EntryList();
frame.getContentPane().add(panel);
frame.pack();
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
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