From 0868c300e8defd9c1c6e3a3ebe644742a72bb4c1 Mon Sep 17 00:00:00 2001
From: Nick Zhebrun <nikolay.zhebrun@gmail.com>
Date: Fri, 5 May 2017 11:10:15 +0300
Subject: [PATCH] adds onSlideWillChange callback

---
 dist/vue-carousel-3d.min.js                      |  2 +-
 docs/source/api/index.md                         | 12 +++++++++---
 docs/themes/vue/source/js/vue-carousel-3d.min.js |  2 +-
 play/index.js                                    |  5 ++++-
 src/Carousel3d.vue                               |  6 ++++++
 5 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/dist/vue-carousel-3d.min.js b/dist/vue-carousel-3d.min.js
index 21a89e0..4df46cd 100644
--- a/dist/vue-carousel-3d.min.js
+++ b/dist/vue-carousel-3d.min.js
@@ -3,4 +3,4 @@
  * (c) 2017 Vladimir Bujanovic
  * https://github.com/wlada/vue-carousel-3d#readme
  */
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diff --git a/docs/source/api/index.md b/docs/source/api/index.md
index 945fd12..fb67244 100755
--- a/docs/source/api/index.md
+++ b/docs/source/api/index.md
@@ -27,7 +27,7 @@ Flag to pause autoplay on hover
 
 ### controlsVisible
 
-Show controls (left/right arrow) 
+Show controls (left/right arrow)
 
 * **Type**: `Boolean`
 * **Default**: `false`
@@ -62,7 +62,7 @@ Animation between slides in milliseconds
 
 ### dir
 
-Animation direction 
+Animation direction
 
 * **Type**: `String`
 * **Default**: `rtl`
@@ -130,10 +130,16 @@ Callback triggered on last slide
 * **Type**: `Function`
 * **param**: `index`
 
+### onSlideWillChange
+
+Callback triggered before slide changed
+
+* **Type**: `Function`
+* **param**: `index`
+
 ### onSlideChange
 
 Callback triggered on slide changed
 
 * **Type**: `Function`
 * **param**: `index`
-
diff --git a/docs/themes/vue/source/js/vue-carousel-3d.min.js b/docs/themes/vue/source/js/vue-carousel-3d.min.js
index 21a89e0..4df46cd 100644
--- a/docs/themes/vue/source/js/vue-carousel-3d.min.js
+++ b/docs/themes/vue/source/js/vue-carousel-3d.min.js
@@ -3,4 +3,4 @@
  * (c) 2017 Vladimir Bujanovic
  * https://github.com/wlada/vue-carousel-3d#readme
  */
-!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.Carousel3d=e():t.Carousel3d=e()}(this,function(){return function(t){function e(i){if(n[i])return n[i].exports;var r=n[i]={exports:{},id:i,loaded:!1};return t[i].call(r.exports,r,r.exports,e),r.loaded=!0,r.exports}var n={};return e.m=t,e.c=n,e.p="",e(0)}([function(t,e,n){"use strict";function i(t){return t&&t.__esModule?t:{default:t}}Object.defineProperty(e,"__esModule",{value:!0}),e.Slide=e.Carousel3d=void 0;var r=n(1),o=i(r),s=n(15),a=i(s),u=function(t){t.component("carousel3d",o.default),t.component("slide",a.default)};e.default={install:u},e.Carousel3d=o.default,e.Slide=a.default},function(t,e,n){n(2);var i=n(7)(n(8),n(57),"data-v-c06c963c",null);t.exports=i.exports},function(t,e,n){var i=n(3);"string"==typeof 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\ No newline at end of file
diff --git a/play/index.js b/play/index.js
index e7bb19b..c80ce38 100755
--- a/play/index.js
+++ b/play/index.js
@@ -198,7 +198,7 @@ play('Carousel3d', module)
     })
 
     .add("callbacks", {
-        template: `<carousel-3d :on-slide-change="onSlideChanged" :on-last-slide="onLastSlide">
+        template: `<carousel-3d :on-slide-change="onSlideChanged" :on-slide-will-change="onSlideWillChange" :on-last-slide="onLastSlide">
             <slide v-for="(slide, i) in slides" :index="i">
                 <img :src="slide.src">
             </slide>
@@ -213,6 +213,9 @@ play('Carousel3d', module)
             }
         },
         methods: {
+            onSlideWillChange(index) {
+                console.log('onSlideWillChange Callback Triggered', 'Slide Index ' + index)
+            },
             onSlideChanged(index){
                 console.log('onSlideChanged Callback Triggered', 'Slide Index ' + index)
             },
diff --git a/src/Carousel3d.vue b/src/Carousel3d.vue
index 2d0d881..c04e005 100644
--- a/src/Carousel3d.vue
+++ b/src/Carousel3d.vue
@@ -84,6 +84,10 @@
             onSlideChange: {
                 type: Function,
                 default: noop
+            },
+            onSlideWillChange: {
+                type: Function,
+                default: noop
             }
         },
         data () {
@@ -206,6 +210,8 @@
                 this.currentIndex = (index < 0 || index > this.total - 1) ? 0 : index
                 this.lock = true
 
+                this.onSlideWillChange(this.currentIndex);
+
                 if (this.isLastSlide) {
                     this.onLastSlide(this.currentIndex)
                 }