Add `zoomchange`, `fullscreenchange` event fired

doc/events.md

@@ -10,13 +10,19 @@ Fired when a panorama finishes loading.
 Fired when a scene change is initiated. A `load` event will be fired when the
 new scene finishes loading. Passes scene ID string to handler.
 
+## `fullscreenchange`
+
+Fired when browser fullscreen status changed, Passes status boolean to handler.
+
+## `zoomchange`
+
+Fired when scene hfov update, Passes new hfov value to handler.
 
 ## `scenechangefadedone`
 
 If a scene transition fade interval is specified, this event is fired when the
 fading is completed after changing scenes.
 
-
 ## `error`
 
 Fired when an error occured. The error message string is passed to the
@@ -46,3 +52,4 @@ Fired when a touch starts. Passes `TouchEvent` to handler.
 ## `touchend`
 
 Fired when a touch ends. Passes `TouchEvent` to handler.
+

src/js/pannellum.js

@@ -1000,7 +1000,6 @@ function onDocumentMouseWheel(event) {
         setHfov(config.hfov + event.detail * 1.5);
         speed.hfov = event.detail > 0 ? 1 : -1;
     }
-    
     animateInit();
 }
 
@@ -2113,7 +2112,7 @@ function onFullScreenChange() {
         controls.fullscreen.classList.remove('pnlm-fullscreen-toggle-button-active');
         fullscreenActive = false;
     }
-
+    fireEvent('fullscreenchange', fullscreenActive);
     // Resize renderer (deal with browser quirks and fixes #155)
     renderer.resize();
     setHfov(config.hfov);
@@ -2185,6 +2184,7 @@ function constrainHfov(hfov) {
  */
 function setHfov(hfov) {
     config.hfov = constrainHfov(hfov);
+    fireEvent('zoomchange', config.hfov);
 }
 
 /**