It actually uses cellClick but never mind.
Yes it is. You can use msg.ui_control send other callbacks to tabulator or even take control over the complete layout. See some posts before 
Ui-table supports ui_control
I use this to do the complete setup of my tables.
A little tip: I use a change node emitting a json object (or most of the time a sub flow with a json environment variable) to configure ui-table and do other things. I write the callback functions in vs-code (but the editor of a function node is fine too). Then I use the visual json editor to paste in the function. All escape sequencing of " to \" is done automatically
"tabulator": {
"responsiveLayout": "collapse",
"responsiveLayoutCollapseStartOpen": false,
"index": "$name",
"layout": "fitColumns",
"movableColumns": true,
"groupBy": "",
"columnResized": "function(column){ var newColumn = { field: column._column.field, visible: column._column.visible, width: column._column.width, widthFixed: column._column.widthFixed, widthStyled: column._column.widthStyled }; this.send({topic:this.config.topic,ui_control:{callback:'columnResized',columnWidths:newColumn}}); }",
"columnMoved": "function(column, columns){ var newColumns=[]; columns.forEach(function (column) { newColumns.push({'field': column._column.definition.field, 'title': column._column.definition.title}); }); this.send({topic:this.config.topic,ui_control:{callback:'columnMoved',columns:newColumns}}); }",
"rowFormatter": "function(row){ var data = row.getData(); switch (data.$state) { case \"lost\": row.getElement().style.backgroundColor = \"#9e2e66\"; row.getElement().style.color = \"#a6a6a6\"; break; case \"sleeping\": row.getElement().style.backgroundColor = \"#336699\"; break; case \"disconnected\": row.getElement().style.backgroundColor = \"#cc3300\"; row.getElement().style.color = \"#a6a6a6\"; break; case \"alert\": row.getElement().style.backgroundColor = \"#A6A6DF\"; break; case \"init\": row.getElement().style.backgroundColor = \"#f2f20d\"; break; case \"ready\": row.getElement().style.backgroundColor = \"\"; row.getElement().style.color = \"\"; break; } }",
"columns": [
{
"formatter": "responsiveCollapse",
"width": 30,
"minWidth": 30,
"align": "center",
"resizable": false,
"headerSort": false,
"frozen": true,
"title": "expand",
"field": "expand",
"headerVertical": "flip"
},
{
"formatter": "function(cell, formatterParams, onRendered) { var html = cell.getValue(); return html; }",
"title": "State",
"field": "$stateIcon",
"width": 100,
"frozen": true,
"headerVertical": "flip"
},
´´´
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