https://azon.com/wp-content/plugins/before-after-image-comparison-…/assets/js/jquery.twentytwenty.js?ver=1.6.5

1(function($){
2  'use strict';
3  $.fn.twentytwenty = function(options) {
4    var options = $.extend({
5      default_offset_pct: 0.5,
6      orientation: 'horizontal',
7      before_label: 'Before',
8      after_label: 'After',
9      no_overlay: false,
10      move_slider_on_hover: false,
11      move_with_handle_only: true,
12      click_to_move: false
13    }, options);
14
15    return this.each(function() {
16
17      var sliderPct = options.default_offset_pct;
18      var container = $(this);
19      var sliderOrientation = options.orientation;
20      var beforeDirection = (sliderOrientation === 'vertical') ? 'down' : 'left';
21      var afterDirection = (sliderOrientation === 'vertical') ? 'up' : 'right';
22
23      container.wrap("<div class='twentytwenty-wrapper twentytwenty-" + sliderOrientation + "'></div>");
24      if(!options.no_overlay) {
25        container.append("<div class='twentytwenty-overlay'></div>");
26      }
27      var beforeImg = container.find("img:first");
28      var afterImg = container.find("img:last");
29      container.append("<div class='twentytwenty-handle'></div>");
30      var slider = container.find(".twentytwenty-handle");
31      slider.append("<span class='twentytwenty-" + beforeDirection + "-arrow'></span>");
32      slider.append("<span class='twentytwenty-" + afterDirection + "-arrow'></span>");
33      container.addClass("twentytwenty-container");
34      beforeImg.addClass("twentytwenty-before");
35      afterImg.addClass("twentytwenty-after");
36
37      var overlay = container.find(".twentytwenty-overlay");
38      overlay.append("<div class='twentytwenty-before-label' data-content='"+options.before_label+"'></div>");
39      overlay.append("<div class='twentytwenty-after-label' data-content='"+options.after_label+"'></div>");
40
41      var calcOffset = function(dimensionPct) {
42        var w = beforeImg.width();
43        var h = beforeImg.height();
44
45
46        return {
47          w: w+"px",
48          h: h+"px",
49          cw: (dimensionPct*w)+"px",
50          ch: (dimensionPct*h)+"px"
51        };
52      };
53
54      var adjustContainer = function(offset) {
55        
56        if (sliderOrientation === 'vertical') {
57          beforeImg.css("clip", "rect(0,"+offset.w+","+offset.ch+",0)");
58          afterImg.css("clip", "rect("+offset.ch+","+offset.w+","+offset.h+",0)");
59        }
60        else {
61          beforeImg.css("clip", "rect(0,"+offset.cw+","+offset.h+",0)");
62          afterImg.css("clip", "rect(0,"+offset.w+","+offset.h+","+offset.cw+")");
63        }
64        container.css("height", offset.h);
65      };
66
67      var adjustSliderWidth = function(offset){
68        container.css("max-width", offset.w);
69      }
70
71      var adjustSlider = function(pct) {
72        var offset = calcOffset(pct);
73        slider.css((sliderOrientation==="vertical") ? "top" : "left", (sliderOrientation==="vertical") ? offset.ch : offset.cw);
74        adjustContainer(offset);
75      };
76
77      // Return the number specified or the min/max number if it outside the range given.
78      var minMaxNumber = function(num, min, max) {
79        return Math.max(min, Math.min(max, num));
80      };
81
82      // Calculate the slider percentage based on the position.
83      var getSliderPercentage = function(positionX, positionY) {
84        var sliderPercentage = (sliderOrientation === 'vertical') ?
85          (positionY-offsetY)/imgHeight :
86          (positionX-offsetX)/imgWidth;
87
88        return minMaxNumber(sliderPercentage, 0, 1);
89      };
90
91
92      $(window).on("resize.twentytwenty", function(e) {
93        adjustSlider(sliderPct);
94      });
95
96      jQuery(document).ready(function(){
97        setTimeout(function(){
98            var offset = calcOffset(sliderPct);
99            adjustSliderWidth(offset);
100            adjustSlider(sliderPct);
101        },500);
102      });
103
104      var offsetX = 0;
105      var offsetY = 0;
106      var imgWidth = 0;
107      var imgHeight = 0;
108      var onMoveStart = function(e) {
109        if (((e.distX > e.distY && e.distX < -e.distY) || (e.distX < e.distY && e.distX > -e.distY)) && sliderOrientation !== 'vertical') {
110          e.preventDefault();
111        }
112        else if (((e.distX < e.distY && e.distX < -e.distY) || (e.distX > e.distY && e.distX > -e.distY)) && sliderOrientation === 'vertical') {
113          e.preventDefault();
114        }
115        container.addClass("active");
116        offsetX = container.offset().left;
117        offsetY = container.offset().top;
118        imgWidth = beforeImg.width(); 
119        imgHeight = beforeImg.height();          
120      };
121      var onMove = function(e) {
122        if (container.hasClass("active")) {
123          sliderPct = getSliderPercentage(e.pageX, e.pageY);
124          adjustSlider(sliderPct);
125          if( e.type == 'mousemove' ){
126            jQuery(this).find('.twentytwenty-overlay').addClass('hover');
127          }
128        }
129      };
130      var onMoveEnd = function(e) {
131        container.removeClass("active");
132        if( e.type == 'mouseleave' ){
133          jQuery(this).find('.twentytwenty-overlay').removeClass('hover');
134        }
135      };
136
137      var moveTarget = options.move_with_handle_only ? slider : container;
138      moveTarget.on("movestart",onMoveStart);
139      moveTarget.on("move",onMove);
140
141      if (options.move_slider_on_hover) {
142        container.on("mouseenter", onMoveStart);
143        container.on("mousemove", onMove);
144        container.on("mouseleave", onMoveEnd);
145      }
146
147      slider.on("touchmove", function(e) {
148        e.preventDefault();
149      });
150
151      container.find("img").on("mousedown", function(event) {
152        event.preventDefault();
153      });
154
155      if (options.click_to_move) {
156        container.on('click', function(e) {
157          offsetX = container.offset().left;
158          offsetY = container.offset().top;
159          imgWidth = beforeImg.width();
160          imgHeight = beforeImg.height();
161
162          sliderPct = getSliderPercentage(e.pageX, e.pageY);
163          adjustSlider(sliderPct);
164        });
165      }
166
167      $(window).trigger("resize.twentytwenty");
168    });
169  };
170
171})(jQuery);