From 29384cd5ff784b5d452672165efad70080ff6357 Mon Sep 17 00:00:00 2001
From: Tom <tmpearce@gmail.com>
Date: Wed, 23 Nov 2022 15:28:40 -0500
Subject: [PATCH] Added event for viewer destroy

---
 .DS_Store     | Bin 0 -> 6148 bytes
 src/viewer.js |  14 +++++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 .DS_Store

diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000000000000000000000000000000000000..375e40c5f8d1ace69802c263d6aff31c98d45125
GIT binary patch
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diff --git a/src/viewer.js b/src/viewer.js
index d963bf14..a564814b 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -756,6 +756,7 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
      * viewer = null; //important
      *
      * @function
+     * @fires OpenSeadragon.Viewer.event:destroy
      */
     destroy: function( ) {
         if ( !THIS[ this.hash ] ) {
@@ -795,7 +796,6 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
             this.navigator = null;
         }
 
-        this.removeAllHandlers();
 
         if (this.buttonGroup) {
             this.buttonGroup.destroy();
@@ -841,6 +841,18 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
 
         // clear our reference to the main element - they will need to pass it in again, creating a new viewer
         this.element = null;
+        /**
+         * Raised when the viewer is destroyed (see {@link OpenSeadragon.Viewer#destroy}).
+         *
+         * @event destroy
+         * @memberof OpenSeadragon.Viewer
+         * @type {object}
+         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
+         * @property {?Object} userData - Arbitrary subscriber-defined object.
+         */
+        this.raiseEvent( 'destroy' );
+
+        this.removeAllHandlers();
     },
 
     /**