Click Select and move

What is the cleaness way to design behaviors so that if I click on an object and then click on its destination anywhere on the screen, it will automatically move to that position? I was thinking of using combination of AI/Move Toward and RTS/MousePointer and MakeSelectable? How should I track the objects selected so I can cycle through it? And also queue up a list of destination point it needs to visit and exec callback?

So I started with this code. Where should I store a list of my destination points? In an global array? Create an scene object and store it there?

Also the problem with this approach is that the object listens to all mouse events including onClick of other objects. What can I do so that it only listens to onclick empty spaces on the screen? Is there a way to check which objects gets click on the top first?

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if (!isObject(MoveQueueBehavior))
{
%template = new BehaviorTemplate(MoveQueueBehavior);

%template.friendlyName = "Move Queue";
%template.behaviorType = "RTS";
%template.description = "Move to queue of Destination Points";

%template.addBehaviorField(speed, "The speed to move toward the object at (world units per second)", float, 10.0);
}

function MoveQueueBehavior::onBehaviorAdd(%this)
{
%this.owner.setUseMouseEvents(true);
}

function MoveQueueBehavior::onAddToScene(%this, %scenegraph)
{
%this.owner.setMouseLocked(true);
}

function MoveQueueBehavior::onMouseDown(%this, %modifier, %worldPos)
{
%this.owner.moveTo(%worldPos, %this.speed);
}