No Matchings - Label replacing MatchingsView for when Matchings not found

ui/src/main/java/edu/kit/iti/formal/psdbg/gui/controls/SequentMatcher.java

@@ -14,11 +14,13 @@ import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.fxml.FXML;
 import javafx.scene.Node;
+import javafx.scene.control.Label;
 import javafx.scene.control.ListCell;
 import javafx.scene.control.ListView;
 import javafx.scene.control.TextArea;
 import javafx.scene.input.MouseEvent;
 import javafx.scene.layout.BorderPane;
+import javafx.scene.layout.Pane;
 
 import java.util.Collections;
 import java.util.HashMap;
@@ -30,7 +32,7 @@ public class SequentMatcher extends BorderPane {
     public GoalOptionsMenu goalOptionsMenu = new GoalOptionsMenu();
 
     @FXML
-    private SequentView sequentView;
+    private SequentViewMatcher sequentView;
 
     @FXML
     private ListView<GoalNode<KeyData>> goalView;
@@ -39,13 +41,17 @@ public class SequentMatcher extends BorderPane {
     private TextArea matchpattern;
 
     @FXML
-    private ListView<Map<String, MatchPath>> matchingsView;
+    private ListView<Map<String, MatchPath>>  matchingsView;
+
+    @FXML
+    private Label nomatchings;
 
     private Map<PosInOccurrence, Range> cursorPosition = new HashMap<>();
 
     public SequentMatcher() {
         Utils.createWithFXML(this);
 
+        getStyleClass().add("sequent-view"); //TODO
 
         selectedGoalNodeToShow.addListener((observable, oldValue, newValue) -> {
                     sequentView.setGoal(newValue.getData().getGoal());
@@ -69,7 +75,8 @@ public class SequentMatcher extends BorderPane {
                 newValue.forEach((name, mp) -> {
                     PosInOccurrence pio = mp.pio();
                     Range r = cursorPosition.get(pio);
-                    sequentView.setStyle(r.start(), r.end(), Collections.singleton("sequent-highlight"));
+                    sequentView.setStyleClass(r.start(),r.end(), "sequent-highlight"); //TODO
+
                     System.out.println("Highlight " + r.start() + " " + r.end());
                 });
 
@@ -106,11 +113,17 @@ public class SequentMatcher extends BorderPane {
         Matchings matchings = MatcherFacade.matches(matchpattern.getText(), getSelectedGoalNodeToShow().getData().getNode().sequent(), true);
         ObservableList<Map<String, MatchPath>> resultlist = FXCollections.observableArrayList(matchings);
 
+        //If no matchings found, add "No matchings found"
         if (resultlist.isEmpty()) {
-            System.out.println("No matchings found for this sequent");
+            matchingsView.setVisible(false);
+            nomatchings.setVisible(true);
+        } else {
+            nomatchings.setVisible(false);
+            matchingsView.setItems(resultlist);
+            matchingsView.setVisible(true);
         }
 
-        matchingsView.setItems(resultlist);
+
 
 
     }

ui/src/main/resources/edu/kit/iti/formal/psdbg/gui/controls/SequentMatcher.fxml

 <?xml version="1.0" encoding="UTF-8"?>
 
-<?import edu.kit.iti.formal.psdbg.gui.controls.SequentView?>
+<?import edu.kit.iti.formal.psdbg.gui.controls.SequentViewMatcher?>
 <?import javafx.geometry.Insets?>
 <?import javafx.scene.control.Button?>
 <?import javafx.scene.control.Label?>
@@ -9,8 +9,10 @@
 <?import javafx.scene.control.TextArea?>
 <?import javafx.scene.layout.VBox?>
 
+
 <?import de.jensd.fx.glyphs.materialdesignicons.MaterialDesignIconView?>
 <?import edu.kit.iti.formal.psdbg.gui.controls.SectionPane?>
+<?import javafx.scene.layout.Pane?>
 <fx:root xmlns="http://javafx.com/javafx/8.0.121" xmlns:fx="http://javafx.com/fxml/1"
          type="edu.kit.iti.formal.psdbg.gui.controls.SequentMatcher">
     <center>
@@ -33,7 +35,7 @@
                     <SectionPane title="Sequent" minHeight="0.0" minWidth="0.0" prefHeight="633.0"
                                  prefWidth="341.0">
                         <center>
-                                <SequentView fx:id="sequentView"/>
+                                <SequentViewMatcher fx:id="sequentView"/>
                         </center>
                     </SectionPane>
                         <SplitPane dividerPositions="0.28551136363636365" layoutX="11.0" layoutY="12.0"
@@ -48,14 +50,16 @@
                                 </VBox>
                                 <VBox prefHeight="349.0">
                                         <Label text="Matches"/>
-                                        <ListView fx:id="matchingsView"/>
+                                            <Pane>
+                                                <Label fx:id ="nomatchings" text="No matchings found" visible="false"/>
+                                                <ListView fx:id="matchingsView" prefWidth="650"/>
+                                            </Pane>
+
                                 </VBox>
                         </SplitPane>
                 </SplitPane>
         </SplitPane>
     </center>
-    <top>
-    </top>
     <padding>
         <Insets bottom="25.0" left="25.0" right="25.0" top="25.0"/>
     </padding>