GXT Tips. Adding a GXT Button widget inside a tab bar right next to TabItems.

GXT_TabPanel_WithButton.java

    // Adding a GXT Button widget inside a tab bar right next to TabItems.
    TabPanel folder = new TabPanel();
    folder.addListener(Events.Render, new Listener<TabPanelEvent>() {
        @Override
        public void handleEvent(TabPanelEvent tpe) {
            TabPanel tp = tpe.getContainer();
            El strip = tp.el().childNode(0).childNode(0).childNode(0);
            int clearIdx = strip.getChildIndex(strip.lastChild().dom);
            Button button = new Button("Press!");
            button.render( strip.dom, clearIdx - 1);
            ComponentHelper.doAttach(button);
            button.addSelectionListener(new SelectionListener<ButtonEvent>() {
                @Override
                public void componentSelected(ButtonEvent ce) {
                    Info.display("", "clicked");
                }
            });
        }
    });
    folder.setWidth(450);
    folder.setAutoHeight(true);
    
    TabItem shortText = new TabItem("Short Text");
    shortText.addStyleName("pad-text");
    shortText.addText(txt);
    folder.add(shortText);

    TabItem longText = new TabItem("Long Text");
    longText.addStyleName("pad-text");
    longText.addText(txt + "<br>" + txt);
    folder.add(longText);