From f6fcd6e16eceb4f5192cdadacc6fd5219ce81de0 Mon Sep 17 00:00:00 2001
From: Patrick Custer <pcuster@stsci.edu>
Date: Mon, 18 Aug 2025 10:33:38 -0400
Subject: [PATCH 1/3] limit updates on zoom and camera move to only once

---
 js/models/event_handler.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/js/models/event_handler.js b/js/models/event_handler.js
index 9a8e2a00..f606d52e 100644
--- a/js/models/event_handler.js
+++ b/js/models/event_handler.js
@@ -94,6 +94,11 @@ export default class EventHandler {
         return;
       }
       jsTargetLock.lock();
+
+      if (this.aladin.view.dragging) {
+        return;
+      }
+
       const raDec = [position.ra, position.dec];
       this.updateWCS();
       this.model.set("_target", `${raDec[0]} ${raDec[1]}`);
@@ -122,6 +127,12 @@ export default class EventHandler {
       }
       jsFovLock.lock();
       // fov MUST be cast into float in order to be sent to the model
+
+      const zoom = this.aladin.view.zoom;
+      if (zoom.isZooming && fov != zoom.finalZoom) {
+        return;
+      }
+
       this.updateWCS();
       this.update2AxisFoV();
       this.model.set("_fov", parseFloat(fov.toFixed(5)));

From fd08fbdec2d916ad7d0c164890c9719aae8aa793 Mon Sep 17 00:00:00 2001
From: Patrick Custer <pcuster@stsci.edu>
Date: Mon, 18 Aug 2025 10:34:21 -0400
Subject: [PATCH 2/3] remove broken update to rotation

---
 js/models/event_handler.js | 1 -
 1 file changed, 1 deletion(-)

diff --git a/js/models/event_handler.js b/js/models/event_handler.js
index f606d52e..e276c75b 100644
--- a/js/models/event_handler.js
+++ b/js/models/event_handler.js
@@ -160,7 +160,6 @@ export default class EventHandler {
 
     /* Rotation control */
     this.model.on("change:_rotation", () => {
-      this.updateRotation(this.model.get("_rotation"), this.aladinDiv);
       // Update WCS and FoV only if this is the last div
       this.updateWCS();
       this.update2AxisFoV();

From 3600459b252dabcd8042bfb1f11b16215f85d55d Mon Sep 17 00:00:00 2001
From: Patrick Custer <pcuster@stsci.edu>
Date: Mon, 18 Aug 2025 10:36:46 -0400
Subject: [PATCH 3/3] remove zeroing out of wcs and fov_xy in rotation update

---
 src/ipyaladin/widget.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/src/ipyaladin/widget.py b/src/ipyaladin/widget.py
index 0b340014..ede60b95 100644
--- a/src/ipyaladin/widget.py
+++ b/src/ipyaladin/widget.py
@@ -345,8 +345,6 @@ def rotation(self, rotation: Union[float, Angle]) -> None:
             rotation = rotation.deg
         if np.isclose(self._rotation, rotation):
             return
-        self._wcs = {}
-        self._fov_xy = {}
         self._rotation = rotation
         self.send({"event_name": "change_rotation", "rotation": rotation})