[2.2.6] LayoutContainer does not add children to DOM (sometimes)

[mcarthum]

I've noticed that it's possible for components added to a LayoutContainer to become "attached" (onAttach() is invoked) but never actually added to the DOM (el().isConnected() returns false). Is this a bug or am I misunderstanding something? To me it seems that when onAttach()/onLoad() is invoked, a widget's element should actually be part of the DOM.

Here is code to reproduce the problem (tested in FF and Chrome):

import java.util.logging.Logger;


import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.Text;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;


public class Foo implements EntryPoint {
    
    private static final Logger logger = Logger.getLogger("Foo");
    
    @Override
    public void onModuleLoad() {
        LayoutContainer parent = new LayoutContainer();
        
        Widget child = new Text("Text") {
            
            @Override
            protected void onAttach() {
                super.onAttach();
                if (isAttached() && !el().isConnected()) {
                    logger.severe("Attached but not connected to DOM!");
                }
            }
        };
        
        // Add child to parent
        parent.add(child);
        
        // Add and remove parent
        RootPanel.get().add(parent);
        RootPanel.get().remove(parent);
        
        // Remove and re-add child
        parent.removeAll();
        parent.add(child);


        // Add parent again -- child does not render
        RootPanel.get().add(parent);
    }
}

[sven]

As discussed here http://www.sencha.com/forum/showthread.php?259810-GXT-2.2.6-LayoutContainer-does-not-add-children-to-DOM-(sometimes) this is not a bug