gridOptions.selectionChanged = function (grid, evt) {
    if (evt.panel.cellType === wijmo.grid.CellType.Cell) {
        if (!!curSelectedRow) {
            curSelectedRow.cssClass = null;
        }
        if (evt.row >= 0) {
            curSelectedRow = contentGridEl.rows[evt.row];
            curSelectedRow.cssClass = 'cur-selected-row';
        }
    }
};

col.cellTemplate = wijmo.grid.cellmaker.CellMaker.makeLink({
    click: function (e, ctx) {
        let param = {
            row: ctx.row.index,
            col: ctx.col.index,
            binding: ctx.col.binding,
            dataItem: ctx.item,
        };
        parentObj.onGridEvent('cellLinkClicked', param);
    },
});

.wj-cells .wj-cell.wj-state-active, .wj-cells .wj-cell.wj-state-multi-selected{
  background-color: red;
}

    var theGrid = new wijmo.grid.FlexGrid('#theGrid', {
	(....)

    var selector = new Selector(theGrid);
    theGrid.selectionMode = "Row"

    theGrid.hostElement.addEventListener("click",function(e){
        var ht = theGrid.hitTest(e); // 클릭한 영역 정보 가져오기
        
        if(ht.panel.cellType === wijmo.grid.CellType.RowHeader && ht.target.type ==='checkbox'){ // 클릭한 곳이 행 머리글이고 체크박스이면
            if(theGrid.rows[ht.row].isSelected){ //체되었다면
                theGrid.rows[ht.row].cssClass = "clicked_selector" // 클래스 추가
            } else { //체크해제 되었다면
                theGrid.rows[ht.row].cssClass = null // 클래스 null 설정
            }
        }
    })

.wj-cells .wj-cell.wj-state-active, .wj-cells .wj-cell.wj-state-multi-selected{
  background-color: red;
}


.clicked_selector{
  background-color: blue !important;
}