From 50d754456f9160313b5751a3ca642fa3f0103d82 Mon Sep 17 00:00:00 2001
From: David Parunakian <dp@dp.io>
Date: Tue, 10 Mar 2015 17:20:41 +0300
Subject: [PATCH] Added option to disable keyboard zooming

---
 doc/json-config-parameters.md | 5 +++++
 src/js/pannellum.js           | 9 +++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/doc/json-config-parameters.md b/doc/json-config-parameters.md
index fc875e4..3af3866 100644
--- a/doc/json-config-parameters.md
+++ b/doc/json-config-parameters.md
@@ -75,6 +75,11 @@ CSS.
 If set to `false`, the zoom controls will not be displayed. Defaults to `true`.
 
 
+### `keyboardZoom`
+
+If set to `false`, zooming with keyboard will be disabled. Defaults to `true`.
+
+
 ### `showFullscreenCtrl`
 
 If set to `false`, the fullscreen control will not be displayed. Defaults to
diff --git a/src/js/pannellum.js b/src/js/pannellum.js
index 928d6fb..ff12272 100644
--- a/src/js/pannellum.js
+++ b/src/js/pannellum.js
@@ -70,7 +70,8 @@ var defaultConfig = {
     type: 'equirectangular',
     northOffset: 0,
     showFullscreenCtrl: true,
-    video: false
+    video: false,
+    keyboardZoom: true
 };
 
 container.className += ' container';
@@ -742,12 +743,12 @@ function keyRepeat() {
     diff = Math.min(diff, 1.0);
     
     // If minus key is down
-    if (keysDown[0]) {
+    if (keysDown[0] && config.keyboardZoom == true) {
         setHfov(config.hfov + (zoomSpeed * 0.8 + 0.5) * diff);
     }
     
     // If plus key is down
-    if (keysDown[1]) {
+    if (keysDown[1] && config.keyboardZoom == true) {
         setHfov(config.hfov + (zoomSpeed * 0.8 - 0.2) * diff);
     }
     
@@ -1309,7 +1310,7 @@ function processOptions() {
                     controls.zoom.style.display = 'none';
                 }
                 break;
-            
+
             case 'showFullscreenCtrl':
                 if (config[key] && ('fullscreen' in document || 'mozFullScreen' in document ||
                     'webkitIsFullScreen' in document || 'msFullscreenElement' in document)) {