Wednesday, April 7, 2010

GWT Horizontal Events Panel

Have you wanted to add event observation/Listening handlers to a panel? This is and easy way to observe events in a GWT HorizontalPanel. Gwt 1.6, 2.0, 2.01, 2.02, 2.03+...

// easy extend and observe mouse events on a gwt horizontal panel widget
public class HorizontalEventPanel extends HorizontalPanel implements HasMouseOverHandlers, HasMouseOutHandlers {

public HorizontalEventPanel() {

public HandlerRegistration addMouseOverHandler(MouseOverHandler handler) {
return addDomHandler(handler, MouseOverEvent.getType());

public HandlerRegistration addMouseOutHandler(MouseOutHandler handler) {
return addDomHandler(handler, MouseOutEvent.getType());

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