vis

jsprit-analysis/src/main/java/jsprit/analysis/toolbox/AlgorithmEventRecorder.java

@@ -24,14 +24,15 @@ import jsprit.core.algorithm.recreate.listener.BeforeJobInsertionListener;
 import jsprit.core.algorithm.recreate.listener.InsertionEndsListener;
 import jsprit.core.algorithm.recreate.listener.InsertionStartsListener;
 import jsprit.core.algorithm.ruin.listener.RuinListener;
+import jsprit.core.problem.AbstractActivity;
 import jsprit.core.problem.VehicleRoutingProblem;
-import jsprit.core.problem.job.Job;
+import jsprit.core.problem.job.*;
-import jsprit.core.problem.job.Service;
 import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
 import jsprit.core.problem.solution.route.VehicleRoute;
 import jsprit.core.problem.solution.route.activity.TourActivity;
 import jsprit.core.problem.vehicle.Vehicle;
 import jsprit.core.problem.vehicle.VehicleImpl;
+import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
 import org.graphstream.graph.Edge;
 import org.graphstream.graph.Graph;
@@ -43,11 +44,19 @@ import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.util.Collection;
+import java.util.List;
 
 
 public class AlgorithmEventRecorder implements RuinListener, IterationStartsListener, InsertionStartsListener, BeforeJobInsertionListener, InsertionEndsListener, AlgorithmEndsListener {
 
+    private boolean renderShipments = false;
 
+    public static void writeSolution(VehicleRoutingProblem vrp, VehicleRoutingProblemSolution solution, File outfile){
+        AlgorithmEventRecorder rec = new AlgorithmEventRecorder(vrp,outfile);
+        rec.initialiseGraph(vrp);
+        rec.addRoutes(solution.getRoutes());
+        rec.finish();
+    }
 
     public static enum RecordPolicy {
         RECORD_AND_WRITE
@@ -75,7 +84,10 @@ public class AlgorithmEventRecorder implements RuinListener, IterationStartsList
 
     private int currentIteration = 0;
 
+    private VehicleRoutingProblem vrp;
+
     public AlgorithmEventRecorder(VehicleRoutingProblem vrp, File outfile) {
+        this.vrp = vrp;
         graph = new MultiGraph("g");
         try {
             writer = new FileWriter(outfile);
@@ -88,6 +100,11 @@ public class AlgorithmEventRecorder implements RuinListener, IterationStartsList
         initialiseGraph(vrp);
     }
 
+    public AlgorithmEventRecorder(VehicleRoutingProblem vrp, File outfile, boolean renderShipments) {
+        this.renderShipments = renderShipments;
+        new AlgorithmEventRecorder(vrp,outfile);
+    }
+
     public void setRecordingRange(int startIteration, int endIteration){
         this.start_recording_at = startIteration;
         this.end_recording_at = endIteration;
@@ -114,23 +131,41 @@ public class AlgorithmEventRecorder implements RuinListener, IterationStartsList
     public void ruinStarts(Collection<VehicleRoute> routes) {
         if(!record()) return;
         fileSink.stepBegins(graph.getId(),0,BEFORE_RUIN_RENDER_SOLUTION);
-        recordRoutes(routes);
+        addRoutes(routes);
         fileSink.stepBegins(graph.getId(),0,RUIN);
     }
 
-    private void recordRoutes(Collection<VehicleRoute> routes) {
+    private void addRoutes(Collection<VehicleRoute> routes) {
         for(VehicleRoute route : routes){
             String prevNode = makeStartId(route.getVehicle());
             for(TourActivity act : route.getActivities()){
-                String actNode = ((TourActivity.JobActivity)act).getJob().getId();
+                String actNodeId = getNodeId(act);
-                addEdge(prevNode+"_"+actNode,prevNode,actNode);
+                addEdge(prevNode+"_"+actNodeId,prevNode,actNodeId);
-                prevNode = actNode;
+                prevNode = actNodeId;
             }
-            String lastNode = makeEndId(route.getVehicle());
+            if(route.getVehicle().isReturnToDepot()) {
-            addEdge(prevNode+"_"+lastNode,prevNode,lastNode);
+                String lastNode = makeEndId(route.getVehicle());
+                addEdge(prevNode+"_"+lastNode,prevNode,lastNode);
+            }
+
         }
     }
 
+    private String getNodeId(TourActivity act) {
+        String nodeId = null;
+        if(act instanceof TourActivity.JobActivity){
+            Job job = ((TourActivity.JobActivity) act).getJob();
+            if(job instanceof Service){
+                nodeId = job.getId();
+            }
+            else if(job instanceof Shipment){
+                if(act.getName().equals("pickupShipment")) nodeId = getFromNodeId((Shipment) job);
+                else nodeId = getToNodeId((Shipment) job);
+            }
+        }
+        return nodeId;
+    }
+
     private boolean record() {
         return currentIteration >= start_recording_at && currentIteration <= end_recording_at;
     }
@@ -143,19 +178,99 @@ public class AlgorithmEventRecorder implements RuinListener, IterationStartsList
     @Override
     public void removed(Job job, VehicleRoute fromRoute) {
         if(!record()) return;
+        if(job instanceof Service) removeService(job, fromRoute);
+        else if(job instanceof Shipment) removeShipment(job,fromRoute);
+    }
+
+    private void removeShipment(Job job, VehicleRoute fromRoute) {
+        Shipment shipment = (Shipment)job;
+        String fromNodeId = getFromNodeId(shipment);
+        String toNodeId = getToNodeId(shipment);
+//        removeNodeAndBelongingEdges(fromNodeId,fromRoute);
+//        removeNodeAndBelongingEdges(toNodeId,fromRoute);
+
+        Edge enteringToNode = getEnteringEdge(toNodeId);
+        if(enteringToNode.getNode0().getId().equals(fromNodeId)){
+            markRemoved(graph.getNode(fromNodeId));
+            markRemoved(graph.getNode(toNodeId));
+            // i -> from -> to -> j: rem(i,from), rem(from,to), rem(to,j), add(i,j)
+            Edge enteringFromNode = getEnteringEdge(fromNodeId);
+            removeEdge(enteringFromNode.getId());
+            removeEdge(enteringToNode.getId());
+            if(graph.getNode(toNodeId).getLeavingEdgeSet().isEmpty()){
+                if(fromRoute.getVehicle().isReturnToDepot()) throw new IllegalStateException("leaving edge is missing");
+                return;
+            }
+
+            Edge leavingToNode = getLeavingEdge(toNodeId);
+            removeEdge(leavingToNode.getId());
+            Node from = enteringFromNode.getNode0();
+            Node to = leavingToNode.getNode1();
+            if(!fromRoute.getActivities().isEmpty()){
+                addEdge(makeEdgeId(from,to),from.getId(),to.getId());
+            }
+        }
+        else{
+            removeNodeAndBelongingEdges(fromNodeId,fromRoute);
+            removeNodeAndBelongingEdges(toNodeId,fromRoute);
+        }
+    }
+
+    private Edge getLeavingEdge(String toNodeId) {
+        Collection<Edge> edges = graph.getNode(toNodeId).getLeavingEdgeSet();
+        if(edges.size()==1) return edges.iterator().next();
+        else{
+            for(Edge e : edges){
+                if(e.getId().startsWith("shipment")){ continue; }
+                return e;
+            }
+        }
+        return null;
+    }
+
+    private Edge getEnteringEdge(String toNodeId) {
+        Collection<Edge> enteringEdges = graph.getNode(toNodeId).getEnteringEdgeSet();
+        if(enteringEdges.size()==1) return enteringEdges.iterator().next();
+        else{
+            for(Edge e : enteringEdges){
+                if(e.getId().startsWith("shipment")){ continue; }
+                return e;
+            }
+        }
+        return null;
+    }
+
+    private String getToNodeId(Shipment shipment) {
+        return shipment.getId() + "_delivery";
+    }
+
+    private String getFromNodeId(Shipment shipment) {
+        return shipment.getId() + "_pickup";
+    }
+
+    private void removeService(Job job, VehicleRoute fromRoute) {
         String nodeId = job.getId();
+        removeNodeAndBelongingEdges(nodeId, fromRoute);
+    }
+
+    private void removeNodeAndBelongingEdges(String nodeId, VehicleRoute fromRoute) {
         Node node = graph.getNode(nodeId);
         markRemoved(node);
-        Edge entering = node.getEnteringEdge(0);
+        Edge entering = getEnteringEdge(nodeId);
         removeEdge(entering.getId());
-        Edge leaving = node.getLeavingEdge(0);
+
+        if(node.getLeavingEdgeSet().isEmpty()){
+            if(fromRoute.getVehicle().isReturnToDepot()) throw new IllegalStateException("leaving edge is missing");
+            return;
+        }
+
+        Edge leaving = getLeavingEdge(nodeId);
         removeEdge((leaving.getId()));
         Node from = entering.getNode0();
         Node to = leaving.getNode1();
         if(!fromRoute.getActivities().isEmpty()){
             addEdge(makeEdgeId(from,to),from.getId(),to.getId());
         }
-
     }
 
     private void markRemoved(Node node) {
@@ -170,7 +285,11 @@ public class AlgorithmEventRecorder implements RuinListener, IterationStartsList
     public void informAlgorithmEnds(VehicleRoutingProblem problem, Collection<VehicleRoutingProblemSolution> solutions) {
         VehicleRoutingProblemSolution solution = Solutions.bestOf(solutions);
         fileSink.stepBegins(graph.getId(),0,BEFORE_RUIN_RENDER_SOLUTION);
-        recordRoutes(solution.getRoutes());
+        addRoutes(solution.getRoutes());
+        finish();
+    }
+
+    private void finish() {
         try {
             fileSink.end();
             writer.close();
@@ -189,10 +308,50 @@ public class AlgorithmEventRecorder implements RuinListener, IterationStartsList
             addVehicle(vehicle);
         }
         for(Job job : problem.getJobs().values()){
-            Service service = (Service)job;
+            addJob(job);
-            addService(service);
         }
+    }
 
+    private void addJob(Job job) {
+        if(job instanceof Service){
+            Service service = (Service)job;
+            addNode(service.getId(), service.getCoord());
+            markService(service);
+        }
+        else if(job instanceof Shipment){
+            Shipment shipment = (Shipment)job;
+            String fromNodeId = getFromNodeId(shipment);
+            addNode(fromNodeId, shipment.getPickupCoord());
+            String toNodeId = getToNodeId(shipment);
+            addNode(toNodeId,shipment.getDeliveryCoord());
+            markShipment(shipment);
+            if(renderShipments) {
+                Edge e = graph.addEdge("shipment_" + fromNodeId + "_" + toNodeId, fromNodeId, toNodeId, true);
+                e.addAttribute("ui.class", "shipment");
+            }
+        }
+    }
+
+    private void markShipment(Shipment shipment) {
+        markPickup(getFromNodeId(shipment));
+        markDelivery(getToNodeId(shipment));
+    }
+
+    private void markService(Service service) {
+        if(service instanceof Pickup){
+            markPickup(service.getId());
+        }
+        else if(service instanceof Delivery){
+            markDelivery(service.getId());
+        }
+    }
+
+    private void markPickup(String id) {
+        graph.getNode(id).addAttribute("ui.class","pickup");
+    }
+
+    private void markDelivery(String id) {
+        graph.getNode(id).addAttribute("ui.class","delivery");
     }
 
     private void addVehicle(Vehicle vehicle) {
@@ -220,25 +379,31 @@ public class AlgorithmEventRecorder implements RuinListener, IterationStartsList
         return vehicle.getId() + "_end";
     }
 
-    private void addService(Service service) {
+    private void addNode(String nodeId, Coordinate nodeCoord) {
-        Node serviceNode = graph.addNode(service.getId());
+        Node node = graph.addNode(nodeId);
-        serviceNode.addAttribute("x", service.getCoord().getX());
+        node.addAttribute("x", nodeCoord.getX());
-        serviceNode.addAttribute("y", service.getCoord().getY());
+        node.addAttribute("y", nodeCoord.getY());
     }
 
     @Override
     public void informInsertionEnds(Collection<VehicleRoute> vehicleRoutes) {
         if(!record()) return;
         fileSink.stepBegins(graph.getId(),0,CLEAR_SOLUTION);
+        removeRoutes(vehicleRoutes);
+    }
+
+    private void removeRoutes(Collection<VehicleRoute> vehicleRoutes) {
         for(VehicleRoute route : vehicleRoutes){
             String prevNode = makeStartId(route.getVehicle());
             for(TourActivity act : route.getActivities()){
-                String actNode = ((TourActivity.JobActivity)act).getJob().getId();
+                String actNode = getNodeId(act);
                 removeEdge(prevNode + "_" + actNode);
                 prevNode = actNode;
             }
-            String lastNode = makeEndId(route.getVehicle());
+            if(route.getVehicle().isReturnToDepot()) {
-            removeEdge(prevNode + "_" + lastNode);
+                String lastNode = makeEndId(route.getVehicle());
+                removeEdge(prevNode + "_" + lastNode);
+            }
         }
     }
 
@@ -246,6 +411,66 @@ public class AlgorithmEventRecorder implements RuinListener, IterationStartsList
     public void informBeforeJobInsertion(Job job, InsertionData data, VehicleRoute route) {
         if(!record()) return;
         markInserted(job);
+        handleVehicleSwitch(data, route);
+        insertJob(job, data, route);
+    }
+
+    private void insertJob(Job job, InsertionData data, VehicleRoute route) {
+        if(job instanceof Service) insertService(job,data,route);
+        else if(job instanceof Shipment) insertShipment(job,data,route);
+    }
+
+    private void insertShipment(Job job, InsertionData data, VehicleRoute route) {
+        String fromNodeId = getFromNodeId((Shipment) job);
+        String toNodeId = getToNodeId((Shipment) job);
+        insertNode(toNodeId,data.getDeliveryInsertionIndex(),data,route);
+
+        List<AbstractActivity> del = vrp.getActivities(job);
+        VehicleRoute copied = VehicleRoute.copyOf(route);
+        copied.getTourActivities().addActivity(data.getDeliveryInsertionIndex(),del.get(1));
+
+        insertNode(fromNodeId, data.getPickupInsertionIndex(), data, copied);
+    }
+
+    private void insertService(Job job, InsertionData data, VehicleRoute route) {
+        insertNode(job.getId(), data.getDeliveryInsertionIndex(), data, route);
+    }
+
+    private void insertNode(String nodeId, int insertionIndex, InsertionData data, VehicleRoute route) {
+//        VehicleRoute copied = VehicleRoute.copyOf(route);
+
+        String node_i;
+
+        if(isFirst(insertionIndex,route)) {
+            node_i = makeStartId(data.getSelectedVehicle());
+        }
+        else {
+            TourActivity.JobActivity jobActivity = (TourActivity.JobActivity) route.getActivities().get(insertionIndex - 1);
+            node_i = getNodeId(jobActivity);
+        }
+        String node_k = nodeId;
+        String edgeId_1 =  node_i + "_" + node_k;
+        String node_j;
+        if(isLast(insertionIndex,route)) {
+            node_j = makeEndId(data.getSelectedVehicle());
+        }
+        else {
+            TourActivity.JobActivity jobActivity = (TourActivity.JobActivity) route.getActivities().get(insertionIndex);
+            node_j = getNodeId(jobActivity);
+        }
+        String edgeId_2 = node_k + "_" + node_j;
+
+        addEdge(edgeId_1, node_i, node_k);
+
+        if(!(isLast(insertionIndex,route) && !data.getSelectedVehicle().isReturnToDepot())) {
+            addEdge(edgeId_2, node_k, node_j);
+            if (!route.getActivities().isEmpty()) {
+                removeEdge(node_i + "_" + node_j);
+            }
+        }
+    }
+
+    private void handleVehicleSwitch(InsertionData data, VehicleRoute route) {
         boolean vehicleSwitch = false;
         if(!(route.getVehicle() instanceof VehicleImpl.NoVehicle)) {
             if (!route.getVehicle().getId().equals(data.getSelectedVehicle().getId())) {
@@ -258,56 +483,55 @@ public class AlgorithmEventRecorder implements RuinListener, IterationStartsList
             String oldEnd = makeEndId(route.getVehicle());
             String lastAct = ((TourActivity.JobActivity)route.getActivities().get(route.getActivities().size()-1)).getJob().getId();
             removeEdge(oldStart + "_" + firstAct);
-            removeEdge(lastAct + "_" + oldEnd);
+
+            if(route.getVehicle().isReturnToDepot()) {
+                removeEdge(lastAct + "_" + oldEnd);
+            }
+
             String newStart = makeStartId(data.getSelectedVehicle());
             String newEnd = makeEndId(data.getSelectedVehicle());
             addEdge(newStart + "_" + firstAct,newStart,firstAct);
-            addEdge(lastAct + "_" + newEnd, lastAct,newEnd);
-        }
-        String node_i;
 
-        if(isFirst(data,route)) {
+            if(data.getSelectedVehicle().isReturnToDepot()) {
-            node_i = makeStartId(data.getSelectedVehicle());
+                addEdge(lastAct + "_" + newEnd, lastAct, newEnd);
-        }
+            }
-        else {
-            node_i = ((TourActivity.JobActivity)route.getActivities().get(data.getDeliveryInsertionIndex()-1)).getJob().getId();
-        }
-        String node_k = job.getId();
-        String edgeId_1 =  node_i + "_" + node_k;
-        String node_j;
-        if(isLast(data,route)) {
-            node_j = makeEndId(data.getSelectedVehicle());
-        }
-        else {
-            node_j = ((TourActivity.JobActivity)route.getActivities().get(data.getDeliveryInsertionIndex())).getJob().getId();
-        }
-        String edgeId_2 = node_k + "_" + node_j;
-
-        addEdge(edgeId_1, node_i, node_k);
-        addEdge(edgeId_2, node_k, node_j);
-        if(!route.getActivities().isEmpty()){
-             removeEdge(node_i + "_" + node_j);
         }
     }
 
     private void markInserted(Job job) {
-        graph.getNode(job.getId()).removeAttribute("ui.class");
+        if(job instanceof Service){
+            markService((Service) job);
+        }
+        else{
+            markShipment((Shipment)job);
+        }
     }
 
     private void removeEdge(String edgeId) {
+        markEdgeRemoved(edgeId);
         graph.removeEdge(edgeId);
     }
 
-    private boolean isFirst(InsertionData data, VehicleRoute route) {
+    private void markEdgeRemoved(String edgeId) {
-        return data.getDeliveryInsertionIndex() == 0;
+        graph.getEdge(edgeId).addAttribute("ui.class","removed");
     }
 
-    private boolean isLast(InsertionData data, VehicleRoute route) {
+    private boolean isFirst(int index, VehicleRoute route) {
-        return data.getDeliveryInsertionIndex() == route.getActivities().size();
+        return index == 0;
+    }
+
+    private boolean isLast(int index, VehicleRoute route) {
+        return index == route.getActivities().size();
     }
 
     private void addEdge(String edgeId, String fromNode, String toNode)  {
         graph.addEdge(edgeId,fromNode,toNode,true);
+        markEdgeInserted(edgeId);
+    }
+
+    private void markEdgeInserted(String edgeId) {
+        graph.getEdge(edgeId).addAttribute("ui.class","inserted");
+        graph.getEdge(edgeId).removeAttribute("ui.class");
     }
 
     @Override

jsprit-analysis/src/main/java/jsprit/analysis/toolbox/GraphStreamViewer.java

@@ -33,16 +33,95 @@ import org.graphstream.graph.Edge;
 import org.graphstream.graph.Graph;
 import org.graphstream.graph.Node;
 import org.graphstream.graph.implementations.MultiGraph;
+import org.graphstream.stream.Sink;
+import org.graphstream.stream.file.FileSinkImages;
 import org.graphstream.ui.swingViewer.View;
 import org.graphstream.ui.swingViewer.Viewer;
 
 import javax.swing.*;
 import java.awt.*;
-
+import java.io.File;
 
 
 public class GraphStreamViewer {
 
+    private static class EmptySink implements Sink {
+
+        @Override
+        public void graphAttributeAdded(String sourceId, long timeId, String attribute, Object value) {
+
+        }
+
+        @Override
+        public void graphAttributeChanged(String sourceId, long timeId, String attribute, Object oldValue, Object newValue) {
+
+        }
+
+        @Override
+        public void graphAttributeRemoved(String sourceId, long timeId, String attribute) {
+
+        }
+
+        @Override
+        public void nodeAttributeAdded(String sourceId, long timeId, String nodeId, String attribute, Object value) {
+
+        }
+
+        @Override
+        public void nodeAttributeChanged(String sourceId, long timeId, String nodeId, String attribute, Object oldValue, Object newValue) {
+
+        }
+
+        @Override
+        public void nodeAttributeRemoved(String sourceId, long timeId, String nodeId, String attribute) {
+
+        }
+
+        @Override
+        public void edgeAttributeAdded(String sourceId, long timeId, String edgeId, String attribute, Object value) {
+
+        }
+
+        @Override
+        public void edgeAttributeChanged(String sourceId, long timeId, String edgeId, String attribute, Object oldValue, Object newValue) {
+
+        }
+
+        @Override
+        public void edgeAttributeRemoved(String sourceId, long timeId, String edgeId, String attribute) {
+
+        }
+
+        @Override
+        public void nodeAdded(String sourceId, long timeId, String nodeId) {
+
+        }
+
+        @Override
+        public void nodeRemoved(String sourceId, long timeId, String nodeId) {
+
+        }
+
+        @Override
+        public void edgeAdded(String sourceId, long timeId, String edgeId, String fromNodeId, String toNodeId, boolean directed) {
+
+        }
+
+        @Override
+        public void edgeRemoved(String sourceId, long timeId, String edgeId) {
+
+        }
+
+        @Override
+        public void graphCleared(String sourceId, long timeId) {
+
+        }
+
+        @Override
+        public void stepBegins(String sourceId, long timeId, double step) {
+
+        }
+    }
 
     public static Graph createMultiGraph(String name, String style){
         Graph g = new MultiGraph(name);
@@ -143,6 +222,12 @@ public class GraphStreamViewer {
 	
 	private double scaling = 1.0;
 
+    private boolean createImageByEvent = false;
+
+    private File imageDirectory;
+
+    Sink fsi = new EmptySink();
+
 	public GraphStreamViewer(VehicleRoutingProblem vrp) {
 		super();
 		this.vrp = vrp;
@@ -159,6 +244,12 @@ public class GraphStreamViewer {
 		return this;
 	}
 
+    public GraphStreamViewer createImagesByEvent(boolean createImanges, File outDirectory){
+        createImageByEvent = true;
+        imageDirectory = outDirectory;
+        return this;
+    }
+
 	public GraphStreamViewer setRenderDelay(long ms){
 		this.renderDelay_in_ms=ms;
 		return this;
@@ -204,7 +295,21 @@ public class GraphStreamViewer {
 
         JFrame jframe = createJFrame(view,scaling);
 
-        render(g,view);
+        Sink fsi;
+        if(createImageByEvent){
+            FileSinkImages.OutputPolicy outputPolicy = FileSinkImages.OutputPolicy.BY_ELEMENT_EVENT;
+            String prefix = "screenshot_";
+            FileSinkImages.OutputType type = FileSinkImages.OutputType.PNG;
+            FileSinkImages.Resolution resolution = FileSinkImages.Resolutions.HD720;
+            fsi = new FileSinkImages( type, resolution );
+            ((FileSinkImages)fsi).setStyleSheet(STYLESHEET);
+            ((FileSinkImages)fsi).setOutputPolicy(outputPolicy);
+            ((FileSinkImages)fsi).setLayoutPolicy(FileSinkImages.LayoutPolicy.NO_LAYOUT);
+            ((FileSinkImages)fsi).setQuality(FileSinkImages.Quality.HIGH);
+            ((FileSinkImages)fsi).setRenderer(FileSinkImages.RendererType.SCALA);
+        }
+
+        render(g, view);
 	}
 
     private JFrame createJFrame(View view, double scaling) {
@@ -254,8 +359,7 @@ public class GraphStreamViewer {
     private void render(Graph g, View view) {
 		if(center != null){
 			view.resizeFrame(view.getWidth(), view.getHeight());
-			view.getCamera().setViewCenter(center.x, center.y, 0);
+            alignCamera(view);
-			view.getCamera().setViewPercent(zoomFactor);
 		}
 
 		for(Vehicle vehicle : vrp.getVehicles()){
@@ -284,7 +388,16 @@ public class GraphStreamViewer {
 		
 	}
 
-	private JLabel createEmptyLabel() {
+    private void alignCamera(View view) {
+        view.getCamera().setViewCenter(center.x, center.y, 0);
+        view.getCamera().setViewPercent(zoomFactor);
+        if(fsi instanceof FileSinkImages){
+            ((FileSinkImages) fsi).setViewCenter(center.x, center.y);
+            ((FileSinkImages) fsi).setViewPercent(zoomFactor);
+        }
+    }
+
+    private JLabel createEmptyLabel() {
 		JLabel emptyLabel1 = new JLabel();
         emptyLabel1.setPreferredSize(new Dimension((int)(40*scaling),(int)(25*scaling)));
 		return emptyLabel1;