Hello, 1°) According the advices of this mailing list, I try to use IMarkupResourceStreamProvider as described in https://ci.apache.org/projects/wicket/guide/7.x/guide/single.html#advanced_5
When using something like: public class AutoMarkupGenPanel extends Panel implements IMarkupResourceStreamProvider { public AutoMarkupGenPanel(String id, IModel<?> model) { super(id, model); } @Override public IResourceStream getMarkupResourceStream(MarkupContainer container, Class<?> containerClass) { String markup = "<div>Panel markup</div>"; StringResourceStream resourceStream = new StringResourceStream(markup); return resourceStream; } } I get : Last cause: Expected to find <wicket:panel> in associated markup file. Markup: org.apache.wicket.util.resource.StringResourceStream@761796f3<mailto:org.apache.wicket.util.resource.StringResourceStream@761796f3>: Misunderstanding or bug in documentation? 2°) If I change the markup to: String markup = "<wicket:panel> my dynamic code </wicket:panel>"; It is OK. If I declare class AutoMarkupGenPanel extends Panel as class AutoMarkupGenPanel extends Label, it does not work. It seems just as getMarkupResourceStream is not called. 3°) I want to have is : <input wicket:id="dateTo" type="text/> The markup I use in my AutoMarkupGenPanel is String markup = "<wicket:panel><input wicket:id=\""+key+"\" /></wicket:panel>"; It fails: Root cause: Unable to find component with id 'dateTo' in [InputText [Component id = after]] Expected: 'filterForm:tableWithFilterForm:topToolbars:toolbars:3:headers:6:header:panel:after:dateTo'. Found with similar names: 'filterForm:dateTo' MarkupStream: [markup = org.apache.wicket.util.resource.StringResourceStream@3055f58b: <wicket:panel><input wicket:id="dateTo" /></wicket:panel> <wicket:panel><input wicket:id="dateTo"/></wicket:panel>, index = 1, current = '<input wicket:id="dateTo"/>' (line 0, column 0)] at org.apache.wicket.markup.MarkupStream.throwMarkupException(MarkupStream.java:526) Is it possible to use IMarkupResourceStreamProvider in this use case ? Thanks for any idea or pointers. PHL.