Refactor: Improve handling of ZipEntryPicker

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

@@ -94,7 +94,7 @@ public class ZipEntryPicker {
     private ProgressBar subProgress;
 
     private CityDoctorController controller;
-
+    private int currentlyLoadedEntry = -1;
 
     private String unknownValueText = Localization.getText("ZipEntryPicker.unknownValue");
 
@@ -156,10 +156,6 @@ public class ZipEntryPicker {
                         Platform.runLater(() -> progress.setProgress(progressValue))
                 );
                 Platform.runLater(() -> {
-                    if (!decompressAllBtn.isDisable() &&
-                            entryList.getItems().stream().allMatch(zipEntryNode -> zipEntryNode.getEntry().isDecompressed())) {
-                        decompressAllBtn.setDisable(true);
-                    }
                     populateZipEntryList(entryList.getSelectionModel().getSelectedIndex());
                 });
             });
@@ -169,17 +165,31 @@ public class ZipEntryPicker {
 
         loadBtn.setOnAction(e -> {
             disableTaskButtons();
+            entryList.setMouseTransparent(true);
+            entryList.setFocusTraversable(false);
+            try {
+                int selectedIndex = entryList.getSelectionModel().getSelectedIndex();
+                if (selectedIndex == currentlyLoadedEntry) {
+                    stage.hide();
+                    return;
+                }
                 CityGmlZipEntry entry = entryList.getSelectionModel().getSelectedItem().getEntry();
                 if (entry.getErrorType() != null) {
                     /**
-                 * Button is disabled when an erroneous entry gets selected.
+                     * Button should be disabled when an erroneous entry gets selected.
                      * Silently fail in case an erroneous entry is somehow selected on Action.
                      */
                     logger.debug("IllegalState: loadBtn was pressed while an erroneous entry was selected");
+                    populateZipEntryList(selectedIndex);
                     return;
                 }
                 controller.loadZipEntry(entry);
+                currentlyLoadedEntry = selectedIndex;
                 stage.hide();
+            } finally {
+                entryList.setMouseTransparent(false);
+                entryList.setFocusTraversable(true);
+            }
 
         });
 
@@ -242,6 +252,8 @@ public class ZipEntryPicker {
         entryList.getSelectionModel().clearSelection();
         entryList.getSelectionModel().select(selectionIndex);
         showMetadata(entryList.getSelectionModel().getSelectedItem().getEntry());
+        decompressAllBtn.setDisable(
+                entryList.getItems().stream().allMatch(zipEntryNode -> zipEntryNode.getEntry().isDecompressed()));
     }
 
     private void showMetadata(CityGmlZipEntry entry) {
@@ -288,6 +300,7 @@ public class ZipEntryPicker {
             }
             objectCountValue.setText(String.valueOf(entry.getModel().getNumberOfFeatures()));
         }
+
     }
 
     private void disableTaskButtons() {
@@ -314,5 +327,6 @@ public class ZipEntryPicker {
         Platform.runLater(() -> {
             stage.showAndWait();
         });
+        populateZipEntryList(entryList.getSelectionModel().getSelectedIndex());
     }
 }