How to add button in HeaderSpan of SmartGWT

Question

I want to add a button to the HeaderSpan of ListGrid in SmartGWT. I tried using the \'HeaderSpan.setAttribute((String property, Object value)) method but it did not work. Below

Answer 1

import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Node;
import com.google.gwt.dom.client.NodeList;
import com.smartgwt.client.widgets.events.DrawEvent;
import com.smartgwt.client.widgets.events.DrawHandler;
import com.smartgwt.client.widgets.grid.ListGrid;

public class AdvancedListGrid extends ListGrid {
    public AdvancedListGrid() {

        // Create the HeaderSpan with title "Identification"

        addDrawHandler(new DrawHandler(){

            @Override
            public void onDraw(DrawEvent event) {
                insertCalendar();
            }});
    }

    public void insertCalendar() {
        for(Element element : DOMUtils.getElementsByTagName("td")) {

            if(element.getInnerHTML().equals("Identification")) {
                createCalendar(element);

            }
        }
    }

    public void createCalendar(Element element) {
        DOMUtils.removeAllChildNodes(element);

        // Create the SmartGWT calendar object. Say the object cal.

        element.setInnerHTML(cal.getInnerHTML());
    }
}

class DOMUtils {
    public static void removeAllChildNodes(Element element) {
        NodeList childList = element.getChildNodes();
        for(int childIndex = 0; childIndex < childList.getLength(); childIndex++) {
            element.removeChild(childList.getItem(childIndex));
        }
    }

    public static Element[] getElementsByTagName(String tagName)
    {
        JavaScriptObject elements = getElementsByTagNameInternal(tagName);
        int length = getArrayLength(elements);
        Element[] result = new Element[length];
        for (int i=0; i=0 && position