Raise an event when all views in a given selector are closed

backbone.layoutmanager.js

@@ -755,16 +755,23 @@ var LayoutManager = Backbone.View.extend({
       // keep.
       if (_.isArray(parentViews)) {
         // Remove duplicate Views.
-        return _.each(_.clone(parentViews), function(view, i) {
+        _.each(_.clone(parentViews), function(view, i) {
           // If the managers match, splice off this View.
           if (view && view.__manager__ === manager) {
             aSplice.call(parentViews, i, 1);
           }
         });
+        if (_.isEmpty(parentViews)){
+            manager.parent.trigger("removedLastViewForSelector",
+                manager.selector);
+        }
+        return;
       }
 
       // Otherwise delete the parent selector.
       delete manager.parent.views[manager.selector];
+      manager.parent.trigger("removedLastViewForSelector",
+          manager.selector);
     }
   },
 

test/spec/views.js

@@ -1704,6 +1704,48 @@ test("Allow layout to remove views", 2, function() {
   equal(view.getViews().value().length, 0, "All nested views under lol removed");
 });
 
+//https://github.com/tbranyen/backbone.layoutmanager/issues/453
+test("Raise an event when all views in a given selector are closed", 3, function() {
+
+  var eventCame = false;
+  var foundSelector = "";
+
+  var view = new Backbone.Layout({ manage: true });
+  view.on("removedLastViewForSelector", function (selector) {eventCame = true; foundSelector = selector;} );
+
+  var firstSubView = new Backbone.Layout({ manage: true });
+  var secondSubView = new Backbone.Layout({ manage: true });
+
+  view.insertView("lol", firstSubView);
+  view.insertView("lol", secondSubView);
+
+  firstSubView.remove();
+  equal(eventCame, false, "Event not yet fired");
+
+  secondSubView.remove();
+  equal(eventCame, true, "Event got fired");
+  equal(foundSelector, "lol", "Right selector was given to event");
+});
+
+//https://github.com/tbranyen/backbone.layoutmanager/issues/453
+test("Raise an event when all views in a given selector are closed single view case", 2, function() {
+
+  var eventCame = false;
+  var foundSelector = "";
+
+  var view = new Backbone.Layout({ manage: true });
+  view.on("removedLastViewForSelector", function (selector) {eventCame = true; foundSelector = selector;} );
+
+  var firstSubView = new Backbone.Layout({ manage: true });
+
+  view.setView("lol", firstSubView);
+
+  firstSubView.remove();
+
+  equal(eventCame, true, "Event got fired");
+  equal(foundSelector, "lol", "Right selector was given to event");
+});
+
 // https://github.com/tbranyen/backbone.layoutmanager/issues/238
 asyncTest("Lost triggered events in cached sub-view", 2, function() {