Source Code : Prevent a shell from closing (prompt the user)

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Prevent a shell from closing (prompt the user)

/*
 * Shell example snippet: prevent a shell from closing (prompt the user)
 *
 * For a list of all SWT example snippets see
 * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;

public class Snippet99 {

  public static void main(String[] args) {
    Display display = new Display();
    final Shell shell = new Shell(display);
    shell.addListener(SWT.Close, new Listener() {
      public void handleEvent(Event event) {
        int style = SWT.APPLICATION_MODAL | SWT.YES | SWT.NO;
        MessageBox messageBox = new MessageBox(shell, style);
        messageBox.setText("Information");
        messageBox.setMessage("Close the shell?");
        event.doit = messageBox.open() == SWT.YES;
      }
    });
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}

           
       

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