Renders an Apache ECharts word cloud chart where word sizes represent numeric values.
ECHARTSWORDCLOUD — 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 (echarts@5.4.3) plus the echarts-wordcloud@2.1.0 extension, which is loaded automatically by ObjReportEchartsbase.Render when the series type is wordCloud. The SQL query must return rows with two columns: word/term and numeric weight. Option building is handled by ObjReportEchartsbase._build_wordcloud_option.