how does cancel/unaccept drag-and-drop operation flex 3?

goal:
allow user mislay record tedious quarrel an advanceddatagrid, dropping onto trash-can idol establish user meant around popup warning "ok" "cancel" buttons.

what working:

• dragging/dropping quarrel onto rabble icon.


• if user clicks "ok" button, record deleted.


• if user clicks "cancel" button, operation canceled.

problem:
after user clicks "cancel" symbol popup warning closes, rows adg dragged. i've detected after classification adg, clicking buttress header, user start tedious rows again.

code: (changed uncanny post)

<mx:image source="{trashimage}" buttonmode="true" 
tooltip="drag member here mislay project"
dragdrop="deleteparticipantdrop(event)" dragenter="deleteparticipantenter(event)" 
dragexit="deleteparticipantdragexit(event)" top="4" right="122" id="image2" />  

// trashimage eventuality handlers:
private duty deleteparticipantenter(event:dragevent):void
{
    var component:iuicomponent = iuicomponent(event.currenttarget);
    dragcomponent = component;
    dragmanager.acceptdragdrop(component);
    dragmanager.showfeedback(dragmanager.move);
    deleteparticipantdragevent = event;
}

private duty deleteparticipantdrop(event:dragevent):void
{
    var selectedkitnum:string = memberrpt.selecteditem.kitnum;
    var selectedname:string = memberrpt.selecteditem.participantname;
    var component:iuicomponent = iuicomponent(event.currenttarget);
    dragcomponent = component;
    dragmanager.acceptdragdrop(component);
    iseditingparticipantinfo = false;
    isdeletingparticipant = true;
    deleteparticipantdropevent = event;
    event.stopimmediatepropagation(); // total per mrm
    alert.confirm("are certain wish mislay participant, container #" + memberrpt.selecteditem.kitnum + " ("  + 
        memberrpt.selecteditem.participantname + ") project?  can't reversed!!  an email " +
        "sent report member accept duplicate your records.", confirmremoveparticipant);
}

private duty deleteparticipantdragexit(event:dragevent):void
{
    var component:iuicomponent = iuicomponent(event.currenttarget);
    dragcomponent = component;
    dragmanager.acceptdragdrop(component);
    dragmanager.showfeedback(dragmanager.none);
}

private duty confirmremoveparticipant(event:closeevent):void
{
    (event.detail == alert.yes)
    {
        deletereason = deleteparticipanttitlewindow(popupmanager.createpopup( this, deleteparticipanttitlewindow , true));
        dispatchevent(deleteparticipantdropevent); // total per mrm
        popupmanager.centerpopup(deletereason);
        deletereason.showclosebutton = true;
        deletereason.title = "reason dismissal project";
        deletereason.addeventlistener("close", cleanupremoveparticipant);
        deletereason["cancelbutton"].addeventlistener("click", cleanupremoveparticipant);
        deletereason["okbutton"].addeventlistener("click", finalizedeleteparticipant);
        isdeletingparticipant = false; 
    }
    else
    {
        cleanupremoveparticipant();
    }
}

private duty cleanupremoveparticipant(event:event = null):void
{
    memberrpt.invalidatedisplaylist();
    memberrpt.executebindings();
    (deletereason != null)
    {
        popupmanager.removepopup(deletereason);
        deletereason = null;
    }
}

public duty finalizedeleteparticipant(event:event):void
{
    (deletereason.reason.text != null)
    {
        selectedreportitem = memberrpt.selecteditem;
        selectedreportitemindex = memberrpt.selectedindex;
        memberreportdata.removeitemat(selectedreportitemindex);
    }
    else
    {
        alert.info("you contingency yield reason stealing member your project!!");
    }

    cleanupremoveparticipant();
}

thanks lay useful suggestions.