implements KeyListener : KeyListener « org.eclipse.swt.events « Java by API

1. Java by API
2. org.eclipse.swt.events
3. KeyListener

implements KeyListener

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class MainClass {

  public static void main(String[] a) {
    Display d = new Display();
    Shell s = new Shell(d);

    s.setSize(250, 200);
    s.setText("A KeyListener Example");
    s.setLayout(new RowLayout());

    final Combo c = new Combo(s, SWT.DROP_DOWN | SWT.BORDER);
    c.add("A");
    c.add("B");
    c.add("C");
    c.add("D");

    c.addKeyListener(new KeyListener() {
      String selectedItem = "";

      public void keyPressed(KeyEvent e) {
        if (c.getText().length() > 0) {
          return;
        }
        String key = Character.toString(e.character);
        String[] items = c.getItems();
        for (int i = 0; i < items.length; i++) {
          if (items[i].toLowerCase().startsWith(key.toLowerCase())) {
            c.select(i);
            selectedItem = items[i];
            return;
          }
        }
      }

      public void keyReleased(KeyEvent e) {
        if (selectedItem.length() > 0)
          c.setText(selectedItem);
        selectedItem = "";
      }
    });
    s.open();
    while (!s.isDisposed()) {
      if (!d.readAndDispatch())
        d.sleep();
    }
    d.dispose();

  }
}

           
       

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