VisibilityWebMarkupContainer.java

package be.selckin.swu;

import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.model.IModel;

public class VisibilityWebMarkupContainer extends WebMarkupContainer {
    private final IModel<Boolean> visible;

    public VisibilityWebMarkupContainer(String id, IModel<Boolean> visible) {
        super(id, visible);
        this.visible = visible;
        setOutputMarkupPlaceholderTag(true);
    }

    @Override
    protected void onConfigure() {
        super.onConfigure();
        Boolean allowed = visible.getObject();
        setVisibilityAllowed(allowed != null && allowed);
    }
}