Improve multi line text UX

pom.xml

@@ -6,7 +6,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.github.hanseter</groupId>
     <artifactId>json-properties-fx</artifactId>
-    <version>1.0.9</version>
+    <version>1.0.10</version>
 
     <packaging>bundle</packaging>
     <name>JSON Properties Editor Fx</name>

src/main/kotlin/com/github/hanseter/json/editor/controls/MultiLineStringControl.kt

@@ -1,18 +1,30 @@
 package com.github.hanseter.json.editor.controls
 
 import javafx.beans.property.Property
+import javafx.scene.control.ScrollPane
 import javafx.scene.control.TextArea
+import javafx.scene.control.skin.TextAreaSkin
 
 class MultiLineStringControl : ControlWithProperty<String?> {
     override val control: TextArea = TextArea().apply {
         maxHeight = 26.0
         prefHeightProperty().bind(maxHeightProperty())
         minHeightProperty().bind(maxHeightProperty())
         textProperty().addListener { _, _, text ->
-            maxHeight = if ('\n' in text) 70.0
-            else 26.0
+            if ('\n' in text) {
+                maxHeight = 70.0
+                setHorizonzalScrollbarPolicy(ScrollPane.ScrollBarPolicy.AS_NEEDED)
+            } else {
+                maxHeight = 26.0
+                setHorizonzalScrollbarPolicy(ScrollPane.ScrollBarPolicy.NEVER)
+            }
         }
     }
+
+    private fun TextArea.setHorizonzalScrollbarPolicy(policy: ScrollPane.ScrollBarPolicy) {
+        ((skin as TextAreaSkin).children.single() as ScrollPane).hbarPolicy = policy
+    }
+
     override val property: Property<String?>
         get() = control.textProperty()