feat(events): Broadcast events on resize and toggle

Events are now broadcast on the ui-layout controller scope when on both resize and toggle.
closes #34

README.md

@@ -133,6 +133,30 @@ percentage
 </div>
 ```
 
+## Events
+
+Events are broadcast on the scope where ui-layout is attached. This means they are available to any controller inside of a ui-layout container. 
+
+### ui.layout.toggle
+
+Dispatched when a container is opened or closed using the chevron buttons.
+'''
+$scope.$on('ui.layout.toggle', function(e, container){
+  if ( container.size > 0 ){
+     console.log('container is open!');
+  }
+});
+'''
+
+### ui.layout.resize
+
+Dispatched as a splitbar is dragged, debounced to occur only every 50ms.
+
+'''
+$scope.$on('ui.layout.resize', function(e, beforeContainer, afterContainer){});
+'''
+
+
 ## Testing
 
 We use Karma and jshint to ensure the quality of the code.  The easiest way to run these checks is to use grunt:

src/ui-layout.js

@@ -4,7 +4,7 @@
  * UI.Layout
  */
 angular.module('ui.layout', [])
-  .controller('uiLayoutCtrl', ['$scope', '$attrs', '$element', 'LayoutContainer', function uiLayoutCtrl($scope, $attrs, $element, LayoutContainer) {
+  .controller('uiLayoutCtrl', ['$scope', '$attrs', '$element', '$timeout', 'LayoutContainer', function uiLayoutCtrl($scope, $attrs, $element, $timeout, LayoutContainer) {
     var ctrl = this;
     var opts = angular.extend({}, $scope.$eval($attrs.uiLayout), $scope.$eval($attrs.options));
     var numOfSplitbars = 0;
@@ -43,6 +43,7 @@ angular.module('ui.layout', [])
       ctrl.updateDisplay();
     };
 
+    var debounceEvent;
     function draw() {
       var position = ctrl.sizeProperties.flowProperty;
       var dividerSize = parseInt(opts.dividerSize);
@@ -90,7 +91,12 @@ angular.module('ui.layout', [])
             // move the splitbar
             ctrl.movingSplitbar[position] = newPosition;
 
-            //TODO: dispatch container resize event
+            // broadcast an event that resize happened (debounced to 50ms)
+            if(debounceEvent) $timeout.cancel(debounceEvent);
+            debounceEvent = $timeout(function() {
+                $scope.$broadcast('ui.layout.resize', beforeContainer, afterContainer);
+                debounceEvent = null;
+            }, 50);
           }
         }
       }
@@ -395,6 +401,7 @@ angular.module('ui.layout', [])
           }
         }
       });
+      $scope.$broadcast('ui.layout.toggle', c);
 
       return c.collapsed;
     };
@@ -439,6 +446,7 @@ angular.module('ui.layout', [])
           if(prevContainer) prevContainer.size -= (c.actualSize + endDiff);
         }
       });
+      $scope.$broadcast('ui.layout.toggle', c);
 
       return c.collapsed;
     };