Disable characters tab for entries that only contain a single character

src/main/kotlin/com/marvinelsen/willow/ui/controllers/DetailsController.kt

@@ -12,6 +12,7 @@ import javafx.fxml.FXML
 import javafx.scene.control.Label
 import javafx.scene.control.ListView
 import javafx.scene.control.ProgressIndicator
+import javafx.scene.control.Tab
 import javafx.scene.control.TabPane
 import javafx.scene.input.ContextMenuEvent
 import javafx.scene.layout.FlowPane
@@ -43,6 +44,9 @@ class DetailsController(private val model: Model, private val config: Config) {
     @FXML
     private lateinit var tabPaneDetails: TabPane
 
+    @FXML
+    private lateinit var tabCharacters: Tab
+
     @FXML
     private lateinit var webViewDefinition: WebView
 
@@ -152,6 +156,15 @@ class DetailsController(private val model: Model, private val config: Config) {
 
             lazyUpdateTabContent(tabPaneDetails.selectionModel.selectedItem.id)
         }
+
+        tabCharacters.disableProperty().bind(
+            Bindings.createBooleanBinding(
+                {
+                    (model.selectedEntry.value?.traditionalProperty?.value?.length ?: 0) < 2
+                },
+                model.selectedEntry
+            )
+        )
     }
 
     private fun initializeListViewWords() {

src/main/resources/fxml/details.fxml

@@ -35,7 +35,7 @@
                 <ProgressIndicator fx:id="progressIndicatorWords" visible="false"/>
             </StackPane>
         </Tab>
-        <Tab id="tabCharacters" closable="false" text="%tab.characters">
+        <Tab fx:id="tabCharacters" id="tabCharacters" closable="false" text="%tab.characters">
             <StackPane>
                 <ListView fx:id="listViewCharacters"/>
                 <Label fx:id="labelNoCharactersFound" text="%list.no_characters_found" textAlignment="CENTER"