This is what I am currently doing.
zoomChangedListener = new ZoomChangedListener();
add(zoomChangedListener);
map.add(new HeaderContributor(new IHeaderContributor() {
private static final long serialVersionUID = 1L;
public void renderHead(IHeaderResponse response) {
response.renderOnDomReadyJavascript(zoomChangedListener.getJSinit().toString());
}
}));
public class ZoomChangedListener extends AbstractDefaultAjaxBehavior
{
private static final long serialVersionUID = 1L;
@Override
protected void respond(AjaxRequestTarget target)
{
Request request = RequestCycle.get().getRequest();
String zoom = request.getParameter("zoom");
System.out.println( "NEW ZOOM: " + zoom );
}
public Object getJSinit()
{
return map.getJSinvoke("addListener('zoom_changed', '" +
this.getCallbackUrl()
+ "')");
}
}
Unfortunately the respond is not being called. Not sure why.
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