Extjs - drag drop restriction - extjs

Question

How do I restrict the drag operation not exceeding certain boundary. Is there any config in extjs (version 3), I saw that, Ext.dd.DragZone class is used. But Im not sure what is the usability. I saw a method dropNotAllowed. Is that the method, that has to be used? if so, how should I use that? Please provide some examples.
Im looking for something similar to (jquery UI's draggable containment property)
http://docs.sencha.com/extjs/3.4.0/#!/api/Ext.dd.DragZone-cfg-dropNotAllowed
I tried using the set X and Y constraints, but it did not work-out:
abc.prototype.initDrag = function(v) {
v.dragZoneobj = new Ext.dd.DragZone(v.getEl(), {
getDragData : function(e) {
var sourceEl = e.getTarget(v.itemSelector, 10);
// sourceEl.setXConstraint( 0, 10 );
var t = e.getTarget();
var rowIndex = abc.grid.getView().findRowIndex(t);
var columnIndex = abc.grid.getView().findCellIndex(t);
if ((rowIndex !== false) && (columnIndex !== false)) {
if (sourceEl) {
abc.isDragged = true;
abc.scriptGrid.isDraggableForObject = false;
abc.scriptGrid.dragRowIndex = false;
d = sourceEl.cloneNode(true);
d.id = Ext.id();
d.textContent = sourceEl.innerHTML;
// d.setXConstraint( 0, 10 );
// d.setYConstraint( 0, 10 );
return {
ddel : d,
sourceEl : d,
sourceStore : v.store
}
}
}
},
getRepairXY : function() {
return this.dragData.repairXY;
},
});
}
Both are commented in the above code. The above code is initiated when the panel is rendered.
edit:
How these setX and setYcontraints have to be used?

Answer 1

By default, the element can be dragged any place on the screen. In the doc there are two methods setXConstraint( iLeft, iRight, iTickSize) and setYConstraint( iUp, iDown, iTickSize )
These two methods is used to set to limit the vertical travel and horizental travel of the element.