From 2f8b61a4be770ee55b5fe9be8bbbf0ce5c6efe18 Mon Sep 17 00:00:00 2001
From: Ross <xkjq@ymail.com>
Date: Mon, 18 May 2026 13:08:32 +0100
Subject: [PATCH] Add forced remount sequence for thumbnail stabilization in
 viewer

---
 .../atlas/collection_case_view_take.html      | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/atlas/templates/atlas/collection_case_view_take.html b/atlas/templates/atlas/collection_case_view_take.html
index 299ae5dd..1ed27237 100644
--- a/atlas/templates/atlas/collection_case_view_take.html
+++ b/atlas/templates/atlas/collection_case_view_take.html
@@ -1017,6 +1017,26 @@
             }
             panel.dataset.viewerControlsBound = '1';
 
+            // Force a take-page-only remount sequence to test thumbnail stabilization.
+            if (mainViewerEl && mainViewerEl.dataset.takeForcedRemountScheduled !== '1') {
+                mainViewerEl.dataset.takeForcedRemountScheduled = '1';
+                var forceTakeRemount = function (label) {
+                    if (typeof window.mountDicomViewers === 'function') {
+                        console.debug('[take-viewer] forcing dv3d remount:', label);
+                        try {
+                            window.mountDicomViewers();
+                        } catch (e) {
+                            console.warn('[take-viewer] forced dv3d remount failed:', label, e);
+                        }
+                    }
+                };
+
+                // First remount shortly after controls initialize.
+                setTimeout(function () { forceTakeRemount('early'); }, 250);
+                // Second remount after initial image pipeline settles.
+                setTimeout(function () { forceTakeRemount('late'); }, 1600);
+            }
+
             var savedH = localStorage.getItem(HEIGHT_KEY);
             if (savedH && !isNaN(parseInt(savedH, 10))) {
                 container.style.height = parseInt(savedH, 10) + 'px';