import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
public class AutoComplete extends JComboBox implements JComboBox.KeySelectionManager
{
private String searchFor;
private long lap;
public class CBDocument extends PlainDocument
{
public void insertString(int offset, String str, AttributeSet a) throws BadLocationException
{
if (str==null) return;
super.insertString(offset, str, a);
if(!isPopupVisible() && str.length() != 0) fireActionEvent();
}
}
public AutoComplete(Object[] items)
{
super(items);
lap = new java.util.Date().getTime();
setKeySelectionManager(this);
JTextField tf;
if(getEditor() != null)
{
tf = (JTextField)getEditor().getEditorComponent();
if(tf != null)
{
tf.setDocument(new CBDocument());
addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent evt)
{
JTextField tf = (JTextField)getEditor().getEditorComponent();
String text = tf.getText();
ComboBoxModel aModel = getModel();
String current;
for(int i = 0; i < aModel.getSize(); i++)
{
current = aModel.getElementAt(i).toString();
if(current.toLowerCase().startsWith(text.toLowerCase()))
{
tf.setText(current);
tf.setSelectionStart(text.length());
tf.setSelectionEnd(current.length());
break;
}
}
}
});
}
}
}
public int selectionForKey(char aKey, ComboBoxModel aModel)
{
long now = new java.util.Date().getTime();
if (searchFor!=null && aKey==KeyEvent.VK_BACK_SPACE && searchFor.length()>0)
{
searchFor = searchFor.substring(0, searchFor.length() -1);
}
else
{
// System.out.println(lap);
// Kam nie hier vorbei.
if(lap + 1000 < now)
searchFor = "" + aKey;
else
searchFor = searchFor + aKey;
}
lap = now;
String current;
for(int i = 0; i < aModel.getSize(); i++)
{
current = aModel.getElementAt(i).toString().toLowerCase();
if (current.toLowerCase().startsWith(searchFor.toLowerCase())) return i;
}
return -1;
}
public void fireActionEvent()
{
super.fireActionEvent();
}
public static void main(String arg[])
{
JFrame f = new JFrame("AutoCompleteComboBox");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(200,300);
Container cp= f.getContentPane();
cp.setLayout(null);
//String[] names= {"Beate", "Claudia", "Fjodor", "Fred", "Friedrich", "Fritz", "Frodo", "Hermann", "Willi"};
//JComboBox cBox= new AutoComplete(names);
Locale[] locales = Locale.getAvailableLocales();//
JComboBox cBox= new AutoComplete(locales);
cBox.setBounds(50,50,100,21);
cBox.setEditable(true);
cp.add(cBox);
f.setVisible(true);
}
}