Key bindings can be updated with any key.

- Changed key press from FXML key event to a listener
- UP, DOWN, ENTER keys now work
- Keys no longer change cells or press buttons
- Added placeholder buttons Cancel, Reset and Save
- Added some JavaDoc

#story[1197]

racevisionGame/src/main/java/visualiser/Controllers/KeyBindingsController.java

@@ -6,13 +6,16 @@ import javafx.event.ActionEvent;
 import javafx.event.EventHandler;
 import javafx.fxml.FXML;
 import javafx.scene.control.Button;
-import javafx.scene.control.Label;
 import javafx.scene.control.ListView;
 import javafx.scene.input.KeyEvent;
+import javafx.scene.layout.AnchorPane;
 import visualiser.gameController.Keys.ControlKey;
 import visualiser.gameController.Keys.KeyFactory;
 import java.util.Map;
 
+/**
+ * Controller for the scene used to display and update current key bindings.
+ */
 public class KeyBindingsController {
     @FXML Button btnSave;
     @FXML Button btnCancel;
@@ -20,18 +23,21 @@ public class KeyBindingsController {
     @FXML ListView lstControl;
     @FXML ListView lstKey;
     @FXML ListView lstDescription;
-    @FXML Label lblTitle;
+    @FXML AnchorPane anchor;
     String currentButton = null;
     KeyFactory keyFactory = KeyFactory.getFactory();
 
     public void initialize(){
 
+        // headings for each column
         lstKey.getItems().add("Key");
         lstControl.getItems().add("Command");
         lstDescription.getItems().add("Description");
+        lstKey.getSelectionModel().select(0);
+        lstControl.getSelectionModel().select(0);
+        lstDescription.getSelectionModel().select(0);
 
-
-
+        // populate columns with current key bindings and buttons to update
         for (Map.Entry<String, ControlKey> entry : keyFactory.getKeyState().entrySet()) {
             Button button = new Button(entry.getKey());
             button.setMinWidth(120);
@@ -46,10 +52,7 @@ public class KeyBindingsController {
             lstDescription.getItems().add(entry.getValue().getProtocolCode());
         }
 
-        lstKey.getSelectionModel().select(0);
-        lstControl.getSelectionModel().select(0);
-        lstDescription.getSelectionModel().select(0);
-
+        // stop the columns from being selectable, so only the buttons are
         lstKey.getSelectionModel().selectedItemProperty()
                 .addListener((observable, oldvalue, newValue) -> {
                     Platform.runLater(new Runnable() {
@@ -75,42 +78,52 @@ public class KeyBindingsController {
                     });
                 });
 
+        // add CSS stylesheet once the scene has been created
         lstKey.sceneProperty().addListener((obs, oldScene, newScene) -> {
             if (newScene != null) {
                 newScene.getStylesheets().add("/css/keyBindings.css");
             }
-
         });
-    }
 
-    public void cancel(){
-        System.out.println("cancel clicked");
+        setKeyListener();
     }
 
-    public void reset(){
-        System.out.println("reset clicked");
-    }
-
-    public void save(){
-        System.out.println("save clicked");
-    }
-
-    public void onKey(KeyEvent e){
-        System.out.println("key pressed");
+    /**
+     * Creates a listener for the base anchorpane for key presses.
+     * It updates the current key bindings if required.
+     */
+    public void setKeyListener(){
+        anchor.addEventFilter(KeyEvent.KEY_PRESSED, event -> {
             // if a button was clicked
-        if (currentButton!=null){
+            if (currentButton != null) {
                 // update text on the button
                 ObservableList buttons = lstKey.getItems();
                 for (int i = 1; i < buttons.size(); i++) {
                     if (currentButton == ((Button)buttons.get(i)).getText()) {
-                    ((Button)buttons.get(i)).setText(e.getCode().toString());
+                        ((Button)buttons.get(i)).setText(event.getCode().toString
+                                ());
                         break;
                     }
                 }
                 // update the control key
-            keyFactory.updateKey(currentButton, e.getCode().toString());
+                keyFactory.updateKey(currentButton, event.getCode().toString());
                 // remove current button selection
                 currentButton = null;
             }
+            event.consume();
+        });
     }
+
+    public void cancel(){
+        System.out.println("cancel clicked");
+    }
+
+    public void reset(){
+        System.out.println("reset clicked");
+    }
+
+    public void save(){
+        System.out.println("save clicked");
+    }
+
 }

racevisionGame/src/main/java/visualiser/gameController/Keys/KeyFactory.java

@@ -52,8 +52,14 @@ public class KeyFactory {
         return keyState;
     }
 
+    /**
+     * Update the key bound to a particular command in the keystate.
+     * @param oldKey the existing key to updated
+     * @param newKey the new key value to replace the old
+     */
     public void updateKey(String oldKey, String newKey){
         ControlKey controlKey = keyState.get(oldKey);
+        keyState.remove(oldKey, controlKey);
         keyState.put(newKey, controlKey);
     }
 }

racevisionGame/src/main/resources/visualiser/scenes/keyBindings.fxml

@@ -6,9 +6,7 @@
 <?import javafx.scene.layout.AnchorPane?>
 <?import javafx.scene.text.Font?>
 
-<AnchorPane id="anchor" maxHeight="-Infinity" maxWidth="-Infinity"
-        minHeight="-Infinity"
-            minWidth="-Infinity" onKeyPressed="#onKey" prefHeight="471.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="visualiser.Controllers.KeyBindingsController">
+<AnchorPane id="anchor" fx:id="anchor" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="471.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="visualiser.Controllers.KeyBindingsController">
    <children>
       <Label fx:id="lblTitle" layoutX="172.0" layoutY="14.0" text="Key Bindings">
          <font>