import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.VerifyEvent;
import org.eclipse.swt.events.VerifyListener;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Shell;

public class ComboTest
{
	private static boolean allow;
	
	public static void main(String[] args)
	{
		final Display display = new Display(); 
		final Shell shell = new Shell(display);
		
		final Combo combo = new Combo(shell, SWT.DROP_DOWN);
		combo.setBounds(10, 10, 100, 20);
		combo.setItems(new String[] {"unu", "doi", "trei", "patru", "cinci"});
		
		combo.addModifyListener(new ModifyListener()
		{
			public void modifyText(ModifyEvent e)
			{
				System.out.println("modify -> $" + combo.getText() + '$' + combo.getSelectionIndex());
			}
		});
		
		combo.addSelectionListener(new SelectionAdapter()
		{
			public void widgetSelected(SelectionEvent e)
			{
				System.out.println("select -> $" + combo.getText() + '$' + combo.getSelectionIndex());
				
				Event verifyEvent = new Event();
				verifyEvent.display = display;
				verifyEvent.doit = true;
				verifyEvent.start = 0;
				verifyEvent.end = combo.getText().length();
				verifyEvent.widget = combo;
				verifyEvent.time = (int) System.currentTimeMillis();
				verifyEvent.text = combo.getItem(combo.getSelectionIndex());
				
				allow = true;
				combo.notifyListeners(SWT.Verify, verifyEvent);
				combo.notifyListeners(SWT.Modify, verifyEvent);
//				combo.select(combo.getSelectionIndex());
//				combo.setText(combo.getItem(combo.getSelectionIndex()));
				allow = false;
			}
		});
		
		combo.addVerifyListener(new VerifyListener()
		{
			private long lastTime;

			public void verifyText(VerifyEvent e)
			{
				System.out.print("verify -> $" + combo.getText() + '$' + combo.getSelectionIndex() + "\t\t\t");
				System.out.println("from " + e.start +" to " + e.end + " &" + e.text +"&");
				
				if (allow)
					return;
				e.doit = false;
			}
		});
		
		shell.pack();
		shell.open();
		while (! shell.isDisposed())
		{
			if (! display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}