When using drag and drop between grids, I want to enable it to be processed only in one direction (A grid -> B grid) rather than in both directions.
You can set grid A's dataDropOptions.dragCallback as follows.
gridViewA.dataDropOptions.dragCallback = function (source, sourceItems, target, targetItem) {
var sourceid = source.getContainer().id;
var targetid = target.getContainer().id;
if ((sourceid != targetid ) && (targetid == 'realgrid')) { //'realgrid' is a div in gridViewA
return false
}
}