Gantt chart for dashboard

Hi All,

Could you please tell me where can I find some gantt chart add-on component? Here is a demo of gantt chart: https://communities.ca.com/web/ca-clarity-global-user-community/message-board;jsessionid=63EB9DC84EE87E7EBB31A30A580C6886.usilap723?p_auth=8hY8uakd&p_p_id=19&p_p_lifecycle=1&p_p_state=exclusive&p_p_mode=view&p_p_col_id=column-1&p_p_col_count=2&_19_struts_action=%2fmessage_boards%2fget_message_attachment&_19_messageId=11299399&_19_attachment=SampleGantt.swf, but I don't know how to use it in my own dashboard reports and I guess it's not free so I'm not able to use it. Or could you tell me the steps to develop SAP dashboard add-on components so that I can develop by myself?

Thanks!

Best Regards,

Jeff