The number of clicks on a cell required to display the cell's editor (defaults to 2).
Setting this option to 'auto' means that mousedown on the selected cell starts editing that cell.
grid.on('afteredit', afterEdit, this );
function afterEdit(e) {
// execute an XHR to send/commit data to the server, in callback do (if successful):
e.record.commit();
};
grid.on('validateedit', function(e) {
var myTargetRow = 6;
if (e.row == myTargetRow) {
e.cancel = true;
e.record.data[e.field] = e.value;
}
});