mouse down vs up

I recognise the difference between these obviously, but I am toying with a Maze gameand how to make the player/hero move in accordance to user input. I have used mouseDraggable which the object just moves exactly where the mouse is, and Follow Mouse, which gives some velocity difference between mouse and hero, in other words, there is a nicer feel to the Follow Mouse. So my question is, how would I make Follow Mouse, only happen on Mouse down events?!


I am sure this will take some minor scripting, but I am not sure where to plug it in.


//-----------------------------------------------------------------------------
// Torque Game Builder
// Copyright (C) GarageGames.com, Inc.
//-----------------------------------------------------------------------------

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

%template.friendlyName = "Follow Mouse Ex";
%template.behaviorType = "Mouse Input";
%template.description = "Set the object to follow the position of the mouse. This version can be " @
"restricted by world limits and will obey collisions.";

%template.addBehaviorField(followX, "Follow the mouse's X position", bool, true);
%template.addBehaviorField(followY, "Follow the mouse's Y position", bool, true);
%template.addBehaviorField(trackingSpeed, "The rate at which the object will move toward the mouse", float, 15.0);
}

function FollowMouseExBehavior::onBehaviorAdd(%this)
{
%this.owner.enableUpdateCallback();
}

function FollowMouseExBehavior::onUpdate(%this)
{
if (!isObject(sceneWindow2d))
return;

%mousePos = sceneWindow2D.getMousePosition();
%position = %this.owner.position;

%difference = t2dVectorSub(%mousePos, %position);
%amount = t2dVectorScale(%difference, %this.trackingSpeed);

if (%this.followX)
%this.owner.setLinearVelocityX(%amount.x);

if (%this.followY)
%this.owner.setLinearVelocityY(%amount.y);
}