the change of the name of an output file should now work from within the gui

VadereGui/src/org/vadere/gui/projectview/view/DataProcessingView.java

@@ -57,6 +57,7 @@ import org.fife.ui.rsyntaxtextarea.SyntaxConstants;
 import org.fife.ui.rsyntaxtextarea.Theme;
 import org.vadere.gui.components.utils.Messages;
 import org.vadere.gui.components.view.JComboCheckBox;
+import org.vadere.gui.projectview.model.ProjectViewModel;
 import org.vadere.gui.projectview.utils.ClassFinder;
 import org.vadere.simulator.projects.Scenario;
 import org.vadere.simulator.projects.dataprocessing.DataProcessingJsonManager;
@@ -87,7 +88,6 @@ class DataProcessingView extends JPanel implements IJsonView {
 	private Scenario currentScenario;
 	private boolean isEditable;
 
-
 	DataProcessingView() {
 		setLayout(new BorderLayout()); // force it to span across the whole available space
 
@@ -240,6 +240,7 @@ class DataProcessingView extends JPanel implements IJsonView {
 			JButton addFileBtn = new JButton(new AbstractAction("Add") {
 				@Override
 				public void actionPerformed(ActionEvent e) {
+
 					String filename = "out.txt";
 					int count = 1;
 					while (outputFileNameAlreadyExists(filename)) { // ensure unique suggested filename

VadereGui/src/org/vadere/gui/projectview/view/ScenarioPanel.java

@@ -50,6 +50,7 @@ public class ScenarioPanel extends JPanel implements IProjectChangeListener, Pro
 
 	private Scenario scenario;
 	private boolean initialized;
+	private ProjectViewModel model;
 
 	private static String activeJsonParsingErrorMsg = null;
 
@@ -58,6 +59,7 @@ public class ScenarioPanel extends JPanel implements IProjectChangeListener, Pro
 		this.scenarioName = scenarioName;
 		this.onlineVisualization = new OnlineVisualization(true);
 		this.postVisualizationView = new PostvisualizationWindow(model.getCurrentProjectPath());
+        this.model = model;
 
 		setBorder(new EmptyBorder(5, 5, 5, 5));
 		setLayout(new CardLayout(0, 0));

VadereModelTests/TestOSM/scenarios/basic_1_chicken_osm1.scenario

@@ -3,8 +3,15 @@
   "description" : "",
   "release" : "0.2",
   "processWriters" : {
-    "files" : [ ],
-    "processors" : [ ],
+    "files" : [ {
+      "type" : "org.vadere.simulator.projects.dataprocessing.outputfile.TimestepPedestrianIdOutputFile",
+      "filename" : "out.txt",
+      "processors" : [ 1 ]
+    } ],
+    "processors" : [ {
+      "type" : "org.vadere.simulator.projects.dataprocessing.processor.PedestrianPositionProcessor",
+      "id" : 1
+    } ],
     "isTimestamped" : true
   },
   "scenario" : {

VadereSimulator/src/org/vadere/simulator/projects/dataprocessing/outputfile/OutputFile.java

@@ -45,7 +45,14 @@ public abstract class OutputFile<K extends DataKey<K>> {
 	}
 
 	public void setRelativeFileName(final String fileName) {
-	    this.fileName = new File(this.fileName).getParentFile().toPath().resolve(fileName).toString();
+	    File file = new File(this.fileName);
+	    if(file.getParentFile() != null) {
+            this.fileName = new File(this.fileName).getParentFile().toPath().resolve(fileName).toString();
+        }
+        else {
+	        this.fileName = fileName;
+        }
+
     }
 
 	public void setProcessorIds(final List<Integer> processorIds) {