I can't seem to find a way to get the version of 2.2.45 so I selected the highest released version, because I downloaded the latest JDK. All the methods explaining on how to get the version on forums are probably for the previous JavaFX

I posted this on StackOverflow
http://stackoverflow.com/questions/20918835/using-javafx-moleculesampleapp-as-a-starting-point-when-rotating-camera-left-be

I am using the MouseDragged event handler and I get the X and Y coordinates from the event using getX() and getY()

When I move over different objects in the scene the X and Y jump to that object's X and Y it seems. I believe it might be a bug in PerspectiveCamera when constructing it with a true. Further down I also added a small application to test this

###Test 1###
This is the scene
http://www.flickr.com/photos/92380311@N04/11792509775/

Clicked on the main object and dragged left over to the bracelet. The numbers with stars show how the Y position just jumped. The target is still the same object that I started on

    X 35.567406068202395 Y 8.69569231620082 target Gizmo@24cce2f source javafx.scene.Scene@6a4dbcfe
    X 36.666015897358335 Y 12.518175916732801 target Gizmo@24cce2f source javafx.scene.Scene@6a4dbcfe
    **X 35.768187104194766 Y 8.806935956274785 target Gizmo@24cce2f source javafx.scene.Scene@6a4dbcfe
    **X 32.783125546287856 Y -1.6894216815835534 target Gizmo@24cce2f source javafx.scene.Scene@6a4dbcfe
    X 32.90862938248895 Y -1.9394236965586344 target Gizmo@24cce2f source javafx.scene.Scene@6a4dbcfe
    X 33.064687701440796 Y -2.087600004540633 target Gizmo@24cce2f source javafx.scene.Scene@6a4dbcfe
    X 33.2336308187289 Y -2.192578553217487 target Gizmo@24cce2f source javafx.scene.Scene@6a4dbcfe
    X 33.59877252681704 Y -2.312234988436174 target Gizmo@24cce2f source javafx.scene.Scene@6a4dbcfe

###Test 2###
I started on the build area object and moved off it onto the scene background

    X 21.456177104447363 Y -117.68464016083907 target BuildArea@1d6a248a source javafx.scene.Scene@6a4dbcfe
    **X 21.441637105907176 Y -117.92347930756549 target BuildArea@1d6a248a source javafx.scene.Scene@6a4dbcfe
    **X 88.73924430219023 Y 283.32754251664767 target BuildArea@1d6a248a source javafx.scene.Scene@6a4dbcfe
    X 88.74685283528898 Y 282.60100768422694 target BuildArea@1d6a248a source javafx.scene.Scene@6a4dbcfe


I wrote a little test app to test this.

    import javafx.application.Application;
    import javafx.event.ActionEvent;
    import javafx.event.EventHandler;
    import javafx.scene.PerspectiveCamera;
    import javafx.scene.Scene;
    import javafx.scene.control.Button;
    import javafx.scene.input.MouseEvent;
    import javafx.scene.layout.StackPane;
    import javafx.scene.shape.Box;
    import javafx.stage.Stage;
    
    public class TestObjectDrag extends Application {
    // private final PerspectiveCamera camera = new PerspectiveCamera(false);
        private final PerspectiveCamera camera = new PerspectiveCamera(true);
    // private final double cameraDistance = -55;
        private final double cameraDistance = 355;
        
        @Override
        public void start(Stage primaryStage) {
            camera.setNearClip(0.1);
            camera.setFarClip(10000.0);
    // camera.setTranslateX(-150);
    // camera.setTranslateY(-125);
            camera.setTranslateZ(-cameraDistance);
            final Box box = new Box(240.0, 10, 10);
            Button btn = new Button("Long text");
            StackPane root = new StackPane();
            root.getChildren().addAll(btn, box, camera);
            root.setOnMouseDragged(new EventHandler<MouseEvent>() {
                @Override
                public void handle(MouseEvent me) {
                    System.out.println("X " + me.getX() + " Y " + me.getY() + " target " + me.getTarget() + " source " + me.getSource());
                }
            });
            
            Scene scene = new Scene(root, 300, 250);
            scene.setCamera(camera);
            
            primaryStage.setTitle("Hello World!");
            primaryStage.setScene(scene);
            primaryStage.show();
        }
    
        public static void main(String[] args) {
            launch(args);
        }

###Test 3###
First I switched off scene.setCamera(camera); and the numbers where fine when I started at the stackpane and moved over the button and the box

    X 177.0 Y 107.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 108.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 109.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 110.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 111.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 112.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 113.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 114.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 115.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 116.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 117.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 118.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 119.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 120.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 177.0 Y 121.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 178.0 Y 121.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 178.0 Y 122.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 178.0 Y 123.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]
    X 178.0 Y 124.0 target StackPane@5045cf52[styleClass=root] source StackPane@5045cf52[styleClass=root]

###Test 4###
I switched the scene camera on, but with false in the constructor of the camera and I changed the distance to 55 so that it is easier to work with and moved the camera -150 on X and -125 on Y. I don't get any jumping of numbers

    X 177.34517301523948 Y 139.11363768528489 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 177.34517301523948 Y 138.2315353299546 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 177.34517301523948 Y 137.34943297462428 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 177.34517301523948 Y 136.467330619294 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.2272753705698 Y 136.467330619294 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.22727537056977 Y 135.58522826396367 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.2272753705698 Y 134.70312590863335 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.2272753705698 Y 133.82102355330306 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.10937772590012 Y 133.82102355330306 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.1093777259001 Y 132.93892119797275 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.10937772590012 Y 132.05681884264246 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.1093777259001 Y 131.17471648731214 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.10937772590012 Y 130.29261413198185 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 129.3569219381653 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 128.48553755053226 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 127.61415316289919 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 126.74276877526613 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 125.87138438763306 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 125.0 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 124.12861561236694 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 123.25723122473387 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 122.38584683710081 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 121.51446244946776 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 120.6430780618347 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.10937772590012 Y 119.70738586801816 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.1093777259001 Y 118.82528351268786 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.10937772590012 Y 117.94318115735756 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.1093777259001 Y 117.06107880202724 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.10937772590012 Y 116.17897644669694 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.10937772590012 Y 115.29687409136663 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.10937772590012 Y 114.41477173603633 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.1093777259001 Y 113.53266938070603 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.10937772590012 Y 112.65056702537572 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 179.10937772590012 Y 111.7684646700454 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 111.05784979787103 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 110.18646541023796 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 109.3150810226049 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 108.44369663497184 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 107.57231224733877 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]
    X 178.755684791891 Y 106.70092785970571 target StackPane@1b7e2718[styleClass=root] source StackPane@1b7e2718[styleClass=root]


###Test 5###
I created PerspectiveCamera with true, changed the camera distance and switched off moving of the camera. I started at the stackpane and moved over the box. The X jumped

    X 150.0 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 150.0 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 150.0 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    **X 150.0 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    **X 186.76262920155003 Y 120.49845356715714 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.5128869403572 Y 120.49845356715714 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.5128869403572 Y 121.24871130596428 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.51288694035716 Y 121.99896904477143 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.5128869403572 Y 122.74922678357856 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.51288694035716 Y 123.49948452238571 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.51288694035716 Y 124.24974226119285 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.5128869403572 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.51288694035716 Y 125.75025773880715 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.51288694035716 Y 126.50051547761429 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.5128869403572 Y 127.25077321642144 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.51288694035716 Y 128.00103095522857 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 187.5128869403572 Y 128.7512886940357 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    **X 187.5128869403572 Y 129.50154643284287 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    **X 150.0 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 150.0 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 150.0 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 150.0 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 150.0 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]
    X 150.0 Y 125.0 target StackPane@2352cffe[styleClass=root] source StackPane@2352cffe[styleClass=root]