From c1bea959f3d638206273c8ccf263d687061e0b1d Mon Sep 17 00:00:00 2001
From: Stewart Allen <stewart.allen@gmail.com>
Date: Mon, 23 Feb 2026 14:23:40 -0500
Subject: [PATCH] middle drag for mouse

---
 src/moto/orbit.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/moto/orbit.js b/src/moto/orbit.js
index 99bfa367..a060f7b6 100644
--- a/src/moto/orbit.js
+++ b/src/moto/orbit.js
@@ -390,6 +390,15 @@ class Orbit extends EventDispatcher {
             if (scope.enabled === false) return;
             event.preventDefault();
 
+            // keep wheel as dolly, but treat middle-button drag like right-button drag
+            // in default orbit bindings.
+            const touchSynthesized = Boolean(event?.sourceCapabilities?.firesTouchEvents);
+            if (!touchSynthesized
+                && event.button === MOUSE.MIDDLE
+                && scope.mouseButtons.ZOOM === MOUSE.MIDDLE
+                && scope.mouseButtons.PAN === MOUSE.RIGHT) {
+                state = STATE.PAN;
+            } else {
             switch (event.button) {
                 case scope.mouseButtons.ORBIT:
                     state = event.metaKey ? STATE.PAN : STATE.ROTATE;
@@ -401,6 +410,7 @@ class Orbit extends EventDispatcher {
                     state = STATE.PAN;
                     break;
             }
+            }
 
             switch (state) {
                 case STATE.ROTATE: