Extract editor from main fxml and add linenumbers

src/main/java/app/controllers/EditorController.java

@@ -1,4 +1,4 @@
-package app.components.editor;
+package app.controllers;
 
 import java.net.URL;
 import java.util.ResourceBundle;
@@ -22,7 +22,7 @@ public class EditorController implements Initializable {
    * Links the controller to the global model
    * @param model The model to be linked
    */
-  public EditorController(Model model) {
+  public void setModel(Model model) {
     this.model = model;
   }
 

src/main/java/app/controllers/fileTree/fileTreeController.java

@@ -1,4 +1,4 @@
-package app.components.fileTree;
+package app.controllers.fileTree;
 
 import javafx.fxml.FXML;
 import javafx.scene.control.TreeView;

src/main/java/module-info.java

@@ -5,5 +5,7 @@ module app {
 	requires javafx.graphics;
   requires org.fxmisc.richtext;
 
+  opens app.controllers to javafx.fxml;
+
   exports app;
 }

src/main/resources/fxml/Main.fxml

@@ -61,11 +61,7 @@
       </ScrollPane>
 
       <!-- Editor -->
-      <VirtualizedScrollPane>
-        <content>
-          <CodeArea fx:id="editor"/>
-        </content>
-      </VirtualizedScrollPane>
+      <fx:include source="components/Editor.fxml" fx:id="editorRoot"/>
   
     </items>
     </SplitPane>

src/main/resources/fxml/components/Editor.fxml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import org.fxmisc.flowless.VirtualizedScrollPane?>
+<?import org.fxmisc.richtext.CodeArea?>
+
+<VirtualizedScrollPane
+  xmlns="http://javafx.com/javafx/8.0.65"
+  xmlns:fx="http://javafx.com/fxml/1"
+  fx:controller="app.controllers.EditorController">
+  <content>
+    <CodeArea fx:id="editor"/>
+  </content>
+</VirtualizedScrollPane>