From 8270a05f1ee9ed5884fd3a784163449fb5c8ea4c Mon Sep 17 00:00:00 2001
From: cfry <cfry@media.mit.edu>
Date: Fri, 23 Jul 2021 19:59:24 -0400
Subject: [PATCH] release

---
 doc/guide.html         | 4 +++-
 doc/release_notes.html | 2 ++
 simulator/simulate.js  | 2 +-
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/doc/guide.html b/doc/guide.html
index cb862471..506c1014 100644
--- a/doc/guide.html
+++ b/doc/guide.html
@@ -1212,7 +1212,9 @@ <h5>Step 3</h5>
                     <li><b>Rotate table</b>: mouse-down then drag.</li>
                     <li><b>Zoom</b>: shift-down then mouse-down then <br/>
                                      drag right to make bigger, drag left to make smaller</li>
-                    <li><b>Pan</b>: alt or option down, then mouse-down, then drag.</li>
+                    <li><b>Pan</b>: alt or option down,then mouse-down,
+                        OR  middle-button (scroll-wheel) down,
+                        then drag.</li>
                 </ul><br/>
                 See also <a href="#" onclick="open_doc(new_dexter_parameters_doc_id, event)">
                     New Dexter Parameters</a>
diff --git a/doc/release_notes.html b/doc/release_notes.html
index 35dc3218..9f6fbfd1 100644
--- a/doc/release_notes.html
+++ b/doc/release_notes.html
@@ -93,6 +93,8 @@
     <li><b>Simulator</b>: fixed to not attempt to display J6 & J7 movement if the simulator
         is not showing.</li>
     <li>Simulator controls for rotating Dexter improved.</li>
+    <li>Simulator  Middle button/scroll_wheel down is now an additional way to pan,
+        from the existing alt/option key down.</li>
     <li>Improved <code>Socket.on_receive</code> to take the Dexter instance as an argument
         rather than compute it,
        (somewhat heuristically) from a robot_status. More reliable, less code.</li>
diff --git a/simulator/simulate.js b/simulator/simulate.js
index 83eefe1f..49ecda11 100644
--- a/simulator/simulate.js
+++ b/simulator/simulate.js
@@ -481,7 +481,7 @@ function sim_handle_mouse_move(){
         sim.camera.zoom = sim.zoom_at_mouseDown + zoom_increment //(spdy * 0.1)
         sim.camera.updateProjectionMatrix()
     }
-    else if (sim.button == 1){
+    else if (sim.altDown || (sim.button == 1)){
         var panX_inc = mouseX_diff / 100
         var panY_inc = mouseY_diff / 100
         sim.table.position.x =  sim.tableX_at_mouseDown + panX_inc