Improved lesion removing / renumbering after removal

Packages/viewerbase/lib/setFocusToActiveViewport.js

@@ -0,0 +1,19 @@
+/**
+ * Restores the browser focus to the currently specified active viewport
+ * as determined from Meteor's Session variable.
+ *
+ * This is allows keydown events to be captured on the focused element
+ */
+setFocusToActiveViewport = function() {
+    // Get the list of viewports
+    var viewports = $('.imageViewerViewport');
+
+    // Get the current active viewport index from Session
+    var activeViewportIndex = Session.get('activeViewport');
+
+    // Find the div from the list of viewports
+    var activeViewport = viewports.eq(activeViewportIndex);
+
+    // Set the browser focus to this div
+    activeViewport.focus();
+};