Style: Show indeterminate progress for ZIP parsing

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/CityDoctorController.java

@@ -91,7 +91,7 @@ public class CityDoctorController {
                 mainWindow.resetFilterComboBox();
             });
             if (path.endsWith(".zip")) {
-                loadCityGmlZipFile(path, numberOfRoundingPlaces, l, useValidation, lowMemory);
+                loadCityGmlZipFile(path, numberOfRoundingPlaces, useValidation, lowMemory);
                 return;
             }
             currentZipEntryManager = null;
@@ -153,8 +153,8 @@ public class CityDoctorController {
         }
     }
 
-    private void loadCityGmlZipFile(String path, int numberOfRoundingPlaces, ProgressListener l, boolean useValidation,
-                                    boolean lowMemory) throws CityGmlParseException, InvalidGmlFileException {
+    private void loadCityGmlZipFile(String path, int numberOfRoundingPlaces, boolean useValidation,
+                                    boolean lowMemory) {
 
         currentConfig = new ParserConfiguration(numberOfRoundingPlaces, useValidation, lowMemory);
         try {

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/OpenFileDialog.java

@@ -150,8 +150,12 @@ public class OpenFileDialog {
 			pathField.setDisable(true);
 			selectBtn.setDisable(true);
 			stage.setOnCloseRequest(Event::consume);
+
 			Thread t = new Thread(() -> {
 				try {
+					if (path.endsWith(".zip")) {
+						Platform.runLater(() -> progress.setProgress(-1));
+					}
 					controller.loadCityGml(path, numberOfRoundingPlaces, progress::setProgress, useValidation,
 							lowMemory);
 					Platform.runLater(() -> stage.close());