Renders an Apache ECharts line chart using the shared ECharts base renderer.
ECHARTSLINE — 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. Sets self.Type = "line". The first column of the SQL result is used as the X-axis category; subsequent numeric columns are rendered as separate line series. Series types can be mixed via the series_types key in _Options.