Make the application handle keyboard keys

oysteikt-calc/src/main/java/oysteikt/calc/CalcApp.java

@@ -12,15 +12,91 @@ import java.io.IOException;
  * JavaFX App
  */
 public class CalcApp extends Application {
-
   @Override
   public void start(Stage stage) throws IOException {
     FXMLLoader fxmlLoader = new FXMLLoader(this.getClass().getResource("Calc.fxml"));
     Parent parent = fxmlLoader.load();
-    stage.setScene(new Scene(parent));
+
+    /* -------------------------------------------------------------------------- */
+    /* Experimental Stuff */
+    /* -------------------------------------------------------------------------- */
+
+    CalcController controller = fxmlLoader.getController();
+    Scene scene = new Scene(parent);
+
+    this.setKeys(scene, controller);
+
+    stage.setScene(scene);
     stage.show();
   }
 
+  private void setKeys(Scene scene, CalcController controller) {
+    scene.setOnKeyTyped(e -> {
+      switch (e.getCharacter()) {
+        case ",":
+        case ".":
+          controller.handlePoint();
+          break;
+
+        case "\n":
+        case "\r":
+          controller.handleEnter();
+          break;
+
+        case "+":
+          controller.handleOpAdd();
+          break;
+
+        case "-":
+          controller.handleOpSub();
+          break;
+
+        case "*":
+          controller.handleOpMult();
+          break;
+
+        case "/":
+        case "\\":
+          controller.handleOpDiv();
+          break;
+
+        case "v": // Looks like a root symbol
+        case "r": // (R)oot
+          controller.handleOpRoot();
+          break;
+
+        case "~":
+        case "s": // (S)wap
+          controller.handleSwap();
+          break;
+
+        case "p": // (P)i
+          controller.handleOpPi();
+          break;
+
+        case "c": // (C)lear
+          controller.handleClear();
+          break;
+
+        case "0":
+        case "1":
+        case "2":
+        case "3":
+        case "4":
+        case "5":
+        case "6":
+        case "7":
+        case "8":
+        case "9":
+          controller.appendToOperand(e.getCharacter());
+          break;
+
+        default:
+          break;
+      }
+    });
+  }
+
   public static void main(String[] args) {
     launch();
   }

oysteikt-calc/src/main/java/oysteikt/calc/CalcController.java

@@ -78,7 +78,7 @@ public class CalcController {
   /*                             Exercise Functions                             */
   /* -------------------------------------------------------------------------- */
 
-  private void appendToOperand(String s) {
+  protected void appendToOperand(String s) {
     this.setOperand(this.getOperandString() + s);
   }