Renders an Apache ECharts radar (spider) chart for comparing multiple dimensions across series.
ECHARTSRADAR — set as ReportType in def_report.
def Render(self, Param1="", Param2="", Param3="") -> str:
Inherited from ObjReportEchartsbase. Param1, Param2, and Param3 are forwarded in the RPC payload for SQL token substitution. Returns an HTML string containing a styled panel and an ECharts initialisation script.
Uses the Apache ECharts JS library. The SQL query must return rows where column 0 is the indicator name and columns 1+ are the values for each series. Indicator max values are derived automatically from the data. Option building is handled by ObjReportEchartsbase._build_radar_option.