fr.inria.zuist.engine

Class LensSceneObserver

java.lang.Object

fr.inria.zuist.engine.SceneObserver

fr.inria.zuist.engine.LensSceneObserver

All Implemented Interfaces:

CameraListener

public class LensSceneObserver
extends SceneObserver
implements CameraListener

Constructor Summary

Constructors

Constructor and Description
LensSceneObserver(View observingView, Camera observingCamera, Lens observingLens, VirtualSpace targetVirtualSpace)

Method Summary

Modifier and Type	Method and Description
void	cameraMoved(Camera cam, Point2D.Double loc, double alt) Called back when a Camera is moved.
double	getAltitude()
double[]	getVisibleRegion()
double	getX()
double	getY()
void	lensMagnified() This method has to be called whenever the lens' magnification factor changes.
void	lensMoved() This method has to be called whenever the lens moves within the view.

Methods inherited from class fr.inria.zuist.engine.SceneObserver

getCamera, getCurrentLevel, getLevelListener, getPreviousAltitude, getRegionListener, getTargetVirtualSpace, getTargetVirtualSpaces, isOfInterest, setLevelListener, setPreviousAltitude, setRegionListener

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LensSceneObserver

public LensSceneObserver(View observingView,
                         Camera observingCamera,
                         Lens observingLens,
                         VirtualSpace targetVirtualSpace)

Parameters:

observingView - view that observes the scene

observingCamera - camera in view that observes the scene

targetVirtualSpace - virtual space in which the scene objects should be put

Method Detail

getVisibleRegion

public double[] getVisibleRegion()

Specified by:

getVisibleRegion in class SceneObserver

getX

public double getX()

Specified by:

getX in class SceneObserver

getY

public double getY()

Specified by:

getY in class SceneObserver

getAltitude

public double getAltitude()

Specified by:

getAltitude in class SceneObserver

cameraMoved

public void cameraMoved(Camera cam,
                        Point2D.Double loc,
                        double alt)

Description copied from interface: CameraListener

Called back when a Camera is moved. Callback handlers are expected to be thread-safe. Do not perform blocking or time consuming tasks within the handler. It is a bad idea to move the target Camera in a handler (infinite loop). Moving other Cameras is also probably a bad idea. To receive notifications, clients should register themselves using Camera.addListener

Specified by:

cameraMoved in interface CameraListener

Parameters:

cam - camera which was moved

loc - camera xy coordinates after the move

alt - camera altitude after the move

See Also:

Camera.addListener(fr.inria.zvtm.event.CameraListener), Camera.removeListener(fr.inria.zvtm.event.CameraListener)

lensMoved

public void lensMoved()

This method has to be called whenever the lens moves within the view. We have no way to detect such changes currently, so the application has to trigger such calls.

lensMagnified

public void lensMagnified()

This method has to be called whenever the lens' magnification factor changes. We have no way to detect such changes currently, so the application has to trigger such calls.