Hi again,

After some more research, in order for a CheckBox to be used in a List
and also support drag/drop, the event listener must be off all the
time.  So, I'm wondering if a better implementation of
draggable/droppable CheckBoxes would be a subclass of CheckBox. 
Introduce a member named _draggable set to false in qx.ui.form.CheckBox,
and add a new class, qx.ui.form.DraggableCheckBox which simply
initializes _draggable to true.  Then, in _onMouseDown and _onMouseUp
wrap the e.stopPropagation() call in:

if (!this._draggable) {
   e.stopPropagation();
}

This will provide a draggable checkbox.

Alternately, remove the stopPropagation() calls from
_onMouseUp()/_onMouseDown() and drag/drop support will work out of the box.

Greg

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