LT-259 Adding warning for when user attempts to close the Lesion Tracker before saving measurements [INTEGRATING NEW MODULE INTO VIEWER + DOCUMENTATION]

Packages/ohif-viewerbase/client/components/viewer/viewerMain/viewerMain.js

@@ -1,4 +1,5 @@
 import { OHIF } from 'meteor/ohif:core';
+import { unloadHandlers } from '../../../lib/unloadHandlers.js';
 
 Template.viewerMain.onCreated(() => {
     // Attach the Window resize listener
@@ -9,6 +10,9 @@ Template.viewerMain.onCreated(() => {
     // See cineDialog instance.setResizeHandler function
     window.addEventListener('resize', handleResize);
 
+    // Add beforeUnload event handler to check for unsaved changes
+    window.addEventListener('beforeunload', unloadHandlers.beforeUnload);
+
     // Create the synchronizer used to update reference lines
     OHIF.viewer.updateImageSynchronizer = new cornerstoneTools.Synchronizer('CornerstoneNewImage', cornerstoneTools.updateImageSynchronizer);
 });
@@ -92,6 +96,9 @@ Template.viewerMain.onDestroyed(() => {
     // Remove the Window resize listener
     window.removeEventListener('resize', handleResize);
 
+    // Remove beforeUnload event handler...
+    window.removeEventListener('beforeunload', unloadHandlers.beforeUnload);
+
     // Destroy the synchronizer used to update reference lines
     OHIF.viewer.updateImageSynchronizer.destroy();