SMART datagrid v.1 > Classes > ColumnHeader
Specify whether to display the sorting handle by HandleVisibility constant or undefined.
If specify undefined or a wrong value, it will follow the value set in OperateOptions.sortHandleVisibility.
Defaults to undefined.
var header = column.header();
header.setSortHandleVisibility(DataLudi.HandleVisibility.ALWAYS);
column.setHeader({
sortHandleVisibility: "hovered";
});