Style: Show a popup that CD is waiting on Schematron

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

@@ -180,6 +180,7 @@ public class CheckDialog {
 	private CityDoctorController controller;
 	private FilterPane filterPane;
 	private MainWindow window;
+	private IndeterminateSpinnerDialog waitingDialog;
 
 	public CheckDialog(MainWindow window, Window parent, CityDoctorController controller) throws IOException {
 		this.window = window;
@@ -327,6 +328,11 @@ public class CheckDialog {
            homepageHyperlink.setText("[Hyperlink missing/invalid]");
         }
 
+		try{
+			waitingDialog = new IndeterminateSpinnerDialog(window.getMainStage(),"Schematron still running, please wait");
+		} catch (IOException e) {
+			logger.error("Failed to load IndeterminateSpinnerDialog");
+        }
 
 
     }
@@ -534,7 +540,12 @@ public class CheckDialog {
 					ProgressListener l = new ProgressListener() {
 						@Override
 						public void updateProgress(float state) {
-							Platform.runLater(() -> progress.setProgress(state));
+							Platform.runLater(() -> {
+								progress.setProgress(state);
+								if (state < 0 ){
+									waitingDialog.show();
+								}
+							});
 						}
 					};
 					controller.startChecks(config, l);
@@ -556,6 +567,7 @@ public class CheckDialog {
 					Platform.runLater(() -> {
 						checkBtn.setDisable(false);
 						cancelBtn.setDisable(false);
+						waitingDialog.hide();
 						stage.setOnCloseRequest(null);
 						stage.close();
 					});