ros viewer now hijakcs scroll and right click to prevent normal behaviour

ros_robot_visualiser/ViewerOverlay.js

@@ -11,6 +11,20 @@ export class ViewerOverlay {
 
 
         this.overlayCanvas = document.getElementById('overlay-canvas');
+        this.overlayCanvas.addEventListener("wheel", (e) => {
+            e.preventDefault();   // stops page scroll/zoom
+            // your zoom logic here
+        }, { passive: false }); // passive:false is required to call preventDefault
+        // Disable browser context menu on canvas
+        this.overlayCanvas.addEventListener("contextmenu", (e) => {
+            e.preventDefault();   // stops the default right‑click menu
+            e.stopPropagation();  // keeps it from bubbling up
+
+            // Your custom right‑click logic here
+            // e.clientX / e.clientY give you the mouse position
+            //this.handleRightClick(e);
+        });
+
         this.overlayCtx = this.overlayCanvas.getContext('2d');
 
         this.uiElements = [];   // for motor list items if you wrap them in UIElements