public bool IsTargetNearSource(DragQueryResult targetBlock)
{
if (ShouldCopyInsteadOfMove)
{
return(false);
}
Block target = targetBlock.DropTarget;
foreach (Block dragged in this)
{
if (target == dragged)
{
return(true);
}
if (target == dragged.Next || target == dragged.Prev)
{
if (target is ISeparatorBlock)
{
return(true);
}
else
{
if (target == dragged.Next &&
targetBlock.HowToDrop == DropTargetInfo.DropBeforeTarget)
{
return(true);
}
if (target == dragged.Prev &&
targetBlock.HowToDrop != DropTargetInfo.DropBeforeTarget)
{
return(true);
}
}
}
}
return(false);
}
public bool CanDropHere(DragQueryResult potentialDropPoint)
{
return
(potentialDropPoint.DropTargetValid &&
!IsTargetNearSource(potentialDropPoint));
}