Renders an interactive timelines (Gantt-style) chart using the timelines-chart library.
BigTable — set as ReportType in def_report.
def Render(self, Param1="", Param2="", Param3="") -> str:
Returns an HTML <div id="timeline"> and inline <script> that initialise a TimelinesChart. The query must return four columns per row: group name (column 1), item label (column 2), start datetime (column 3), end datetime (column 4). Rows are grouped by column 1; within each group, each item is plotted as a labelled time range. The zQualitative option is set to true.
Requires timelineschart/timelines-chart.