Added a tooltip to the fullscreen button.

display/display.css

@@ -46,6 +46,7 @@
     user-select: none;
     z-index: 1;
     pointer-events: none;
+    cursor: default;
 }
 
 .no-select {
@@ -56,7 +57,6 @@
     -ms-user-select: none; /* Internet Explorer/Edge */
     user-select: none; /* Non-prefixed version, currently
                                   supported by Chrome, Edge, Opera and Firefox */
-    cursor: default;
 }
 
 .close-button {

display/display.js

@@ -15,18 +15,19 @@ function loadComponents() {
 
 function createFullScreenButton() {
     const sceneNode = Helpers.getCanvasDivNode();
-    const overlayNode = document.createElement("div");
-    overlayNode.className = "fullscreen-button";
-    overlayNode.innerHTML = "<p>&#10530;</p>";
+    const overlayNode = Helpers.createDiv("fullscreen-button", sceneNode, {
+        innerHTML: "<p>&#10530;</p>",
+        title: "Vollbild",
+    });
+    overlayNode.classList.add("no-select");
     overlayNode.addEventListener("click", function () {
         if (screenfull.isEnabled) {
-            screenfull.toggle(Helpers.getCanvasDivNode());
+            screenfull.toggle(sceneNode);
             G.resize();
         } else {
             console.log("No fullscreen mode available :(");
         }
     });
-    sceneNode.appendChild(overlayNode);
 }
 
 let G = null;