Level class created and gravity editable.

tilorswift/js/dialog/DialogGravity.js

@@ -0,0 +1,22 @@
+import Dialog from "./Dialog.js";
+import TilorswiftGravityUpdatedEvent from "../events/TilorswiftGravityUpdatedEvent.js";
+
+export default class DialogGravity extends Dialog
+{
+    constructor(gravity)
+    {
+        super();
+        this.setMessage('Gravitation einstellen');
+        this.inputGravity = this.createInputNumber('Stärke', gravity, 0, 10, 0.01);
+        this.createButton('Abbrechen');
+        this.buttonOk = this.createButton('OK');
+        this.buttonOk.addEventListener(
+            'click',
+            () => {
+                window.dispatchEvent(
+                    new TilorswiftGravityUpdatedEvent(parseFloat(this.inputGravity.value))
+                );
+            }
+        )
+    }
+}