Event fired before cell(s) are about to be selected (cancellable). Return false in order to cancel cell selection changing. Function takes arguments evt and ui. Use ui.owner to get reference to igGridSelection. Use ui.owner.grid to get reference to igGrid. Use ui.cell.element to get reference to cell DOM element. Use ui.cell.columnKey to get reference to column key. Use ui.cell.index to get column index. Use ui.cell.row to get reference to row DOM element. Use ui.cell.rowIndex to get row index. Use ui.selectedCells to get reference to selected cells object array. ui.manual - returns true if internal trigger.
Target Platforms: Windows 8.1, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2