package jimm.datavision.gui;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JComponent;
import javax.swing.Timer;
/**
* Gives focus to a component, since often after building a frame the
* component we want to have focus doesn't get it.
* <p>
* Based on code found at <a href="http://privat.schlund.de/b/bossung/prog/java/tips.html">http://privat.schlund.de/b/bossung/prog/java/tips.html</a>.
* Modified to perform the focus request only once.
*
* @author Jim Menard, <a href="mailto:jimm@io.com">jimm@io.com</a>
*/
public class FocusSetter implements ActionListener {
protected static final int WAIT_MILLISECS = 200;
protected JComponent component;
protected Timer timer;
public FocusSetter(JComponent comp) {
component = comp;
if (component != null) {
timer = new Timer(WAIT_MILLISECS, this);
timer.setRepeats(false);
timer.start();
}
}
public void actionPerformed(ActionEvent evt) {
if (evt != null && evt.getSource() == timer && component != null)
component.requestFocus();
}
}