GMapHeaderContributor.java

package wicket.contrib.gmap3;

import org.apache.wicket.Component;
import org.apache.wicket.ajax.WicketAjaxReference;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.html.IHeaderResponse;
import org.apache.wicket.markup.html.WicketEventReference;
import org.apache.wicket.request.resource.JavaScriptResourceReference;
import org.apache.wicket.request.resource.ResourceReference;

/**
 * The Class GMapHeaderContributor.
 */
public class GMapHeaderContributor extends Behavior {
    private static final long serialVersionUID = 1L;

    // URL for Google Maps' API endpoint.
    private static final String GMAP_API_URL = "://maps.google.com/maps/api/js?v=3&sensor=false";

    private static final String HTTP = "http";

    // We have some custom Javascript.
    private static final ResourceReference WICKET_GMAP_JS = new JavaScriptResourceReference(GMap.class,
            "wicket-gmap.js");

    String _schema;

    /**
     * Instantiates a new g map header contributor.
     */
    public GMapHeaderContributor() {
        _schema = HTTP;
    }

    /* (non-Javadoc)
     * @see org.apache.wicket.behavior.Behavior#renderHead(org.apache.wicket.Component, org.apache.wicket.markup.html.IHeaderResponse)
     */
    @Override
    public void renderHead(final Component component, final IHeaderResponse response) {
        response.renderJavaScriptReference(_schema + GMAP_API_URL);
        response.renderJavaScriptReference(WicketEventReference.INSTANCE);
        response.renderJavaScriptReference(WicketAjaxReference.INSTANCE);

        response.renderJavaScriptReference(WICKET_GMAP_JS);
    }

}