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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | espaco | 1 | /*! |
| 2 | Zoom v1.7.11 - 2013-11-12 |
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| 3 | Enlarge images on click or mouseover. |
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| 4 | (c) 2013 Jack Moore - http://www.jacklmoore.com/zoom |
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| 5 | license: http://www.opensource.org/licenses/mit-license.php |
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| 6 | */ |
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| 7 | (function ($) { |
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| 8 | var defaults = { |
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| 9 | url: false, |
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| 10 | callback: false, |
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| 11 | target: false, |
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| 12 | duration: 120, |
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| 13 | on: 'mouseover', // other options: grab, click, toggle |
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| 14 | touch: true, // enables a touch fallback |
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| 15 | onZoomIn: false, |
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| 16 | onZoomOut: false, |
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| 17 | magnify: 1 |
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| 18 | }; |
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| 19 | |||
| 20 | // Core Zoom Logic, independent of event listeners. |
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| 21 | $.zoom = function(target, source, img, magnify) { |
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| 22 | var targetHeight, |
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| 23 | targetWidth, |
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| 24 | sourceHeight, |
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| 25 | sourceWidth, |
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| 26 | xRatio, |
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| 27 | yRatio, |
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| 28 | offset, |
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| 29 | position = $(target).css('position'); |
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| 30 | |||
| 31 | // The parent element needs positioning so that the zoomed element can be correctly positioned within. |
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| 32 | $(target).css({ |
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| 33 | position: /(absolute|fixed)/.test(position) ? position : 'relative', |
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| 34 | overflow: 'hidden' |
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| 35 | }); |
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| 36 | |||
| 37 | img.style.width = img.style.height = ''; |
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| 38 | |||
| 39 | $(img) |
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| 40 | .addClass('zoomImg') |
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| 41 | .css({ |
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| 42 | position: 'absolute', |
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| 43 | top: 0, |
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| 44 | left: 0, |
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| 45 | opacity: 0, |
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| 46 | width: img.width * magnify, |
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| 47 | height: img.height * magnify, |
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| 48 | border: 'none', |
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| 49 | maxWidth: 'none' |
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| 50 | }) |
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| 51 | .appendTo(target); |
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| 52 | |||
| 53 | return { |
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| 54 | init: function() { |
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| 55 | targetWidth = $(target).outerWidth(); |
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| 56 | targetHeight = $(target).outerHeight(); |
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| 57 | |||
| 58 | if (source === target) { |
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| 59 | sourceWidth = targetWidth; |
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| 60 | sourceHeight = targetHeight; |
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| 61 | } else { |
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| 62 | sourceWidth = $(source).outerWidth(); |
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| 63 | sourceHeight = $(source).outerHeight(); |
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| 64 | } |
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| 65 | |||
| 66 | xRatio = (img.width - targetWidth) / sourceWidth; |
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| 67 | yRatio = (img.height - targetHeight) / sourceHeight; |
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| 68 | |||
| 69 | offset = $(source).offset(); |
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| 70 | }, |
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| 71 | move: function (e) { |
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| 72 | var left = (e.pageX - offset.left), |
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| 73 | top = (e.pageY - offset.top); |
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| 74 | |||
| 75 | top = Math.max(Math.min(top, sourceHeight), 0); |
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| 76 | left = Math.max(Math.min(left, sourceWidth), 0); |
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| 77 | |||
| 78 | img.style.left = (left * -xRatio) + 'px'; |
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| 79 | img.style.top = (top * -yRatio) + 'px'; |
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| 80 | } |
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| 81 | }; |
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| 82 | }; |
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| 83 | |||
| 84 | $.fn.zoom = function (options) { |
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| 85 | return this.each(function () { |
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| 86 | var |
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| 87 | settings = $.extend({}, defaults, options || {}), |
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| 88 | //target will display the zoomed image |
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| 89 | target = settings.target || this, |
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| 90 | //source will provide zoom location info (thumbnail) |
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| 91 | source = this, |
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| 92 | img = document.createElement('img'), |
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| 93 | $img = $(img), |
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| 94 | mousemove = 'mousemove.zoom', |
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| 95 | clicked = false, |
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| 96 | touched = false, |
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| 97 | $urlElement; |
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| 98 | |||
| 99 | // If a url wasn't specified, look for an image element. |
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| 100 | if (!settings.url) { |
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| 101 | $urlElement = $(source).find('img'); |
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| 102 | if ($urlElement[0]) { |
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| 103 | settings.url = $urlElement.data('src') || $urlElement.attr('src'); |
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| 104 | } |
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| 105 | if (!settings.url) { |
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| 106 | return; |
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| 107 | } |
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| 108 | } |
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| 109 | |||
| 110 | img.onload = function () { |
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| 111 | var zoom = $.zoom(target, source, img, settings.magnify); |
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| 112 | |||
| 113 | function start(e) { |
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| 114 | zoom.init(); |
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| 115 | zoom.move(e); |
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| 116 | |||
| 117 | // Skip the fade-in for IE8 and lower since it chokes on fading-in |
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| 118 | // and changing position based on mousemovement at the same time. |
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| 119 | $img.stop() |
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| 120 | .fadeTo($.support.opacity ? settings.duration : 0, 1, $.isFunction(settings.onZoomIn) ? settings.onZoomIn.call(img) : false); |
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| 121 | } |
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| 122 | |||
| 123 | function stop() { |
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| 124 | $img.stop() |
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| 125 | .fadeTo(settings.duration, 0, $.isFunction(settings.onZoomOut) ? settings.onZoomOut.call(img) : false); |
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| 126 | } |
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| 127 | |||
| 128 | // Mouse events |
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| 129 | if (settings.on === 'grab') { |
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| 130 | $(source) |
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| 131 | .on('mousedown.zoom', |
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| 132 | function (e) { |
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| 133 | if (e.which === 1) { |
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| 134 | $(document).one('mouseup.zoom', |
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| 135 | function () { |
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| 136 | stop(); |
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| 137 | |||
| 138 | $(document).off(mousemove, zoom.move); |
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| 139 | } |
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| 140 | ); |
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| 141 | |||
| 142 | start(e); |
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| 143 | |||
| 144 | $(document).on(mousemove, zoom.move); |
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| 145 | |||
| 146 | e.preventDefault(); |
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| 147 | } |
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| 148 | } |
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| 149 | ); |
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| 150 | } else if (settings.on === 'click') { |
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| 151 | $(source).on('click.zoom', |
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| 152 | function (e) { |
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| 153 | if (clicked) { |
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| 154 | // bubble the event up to the document to trigger the unbind. |
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| 155 | return; |
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| 156 | } else { |
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| 157 | clicked = true; |
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| 158 | start(e); |
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| 159 | $(document).on(mousemove, zoom.move); |
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| 160 | $(document).one('click.zoom', |
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| 161 | function () { |
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| 162 | stop(); |
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| 163 | clicked = false; |
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| 164 | $(document).off(mousemove, zoom.move); |
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| 165 | } |
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| 166 | ); |
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| 167 | return false; |
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| 168 | } |
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| 169 | } |
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| 170 | ); |
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| 171 | } else if (settings.on === 'toggle') { |
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| 172 | $(source).on('click.zoom', |
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| 173 | function (e) { |
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| 174 | if (clicked) { |
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| 175 | stop(); |
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| 176 | } else { |
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| 177 | start(e); |
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| 178 | } |
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| 179 | clicked = !clicked; |
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| 180 | } |
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| 181 | ); |
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| 182 | } else if (settings.on === 'mouseover') { |
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| 183 | zoom.init(); // Preemptively call init because IE7 will fire the mousemove handler before the hover handler. |
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| 184 | |||
| 185 | $(source) |
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| 186 | .on('mouseenter.zoom', start) |
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| 187 | .on('mouseleave.zoom', stop) |
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| 188 | .on(mousemove, zoom.move); |
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| 189 | } |
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| 190 | |||
| 191 | // Touch fallback |
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| 192 | if (settings.touch) { |
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| 193 | $(source) |
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| 194 | .on('touchstart.zoom', function (e) { |
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| 195 | e.preventDefault(); |
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| 196 | if (touched) { |
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| 197 | touched = false; |
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| 198 | stop(); |
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| 199 | } else { |
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| 200 | touched = true; |
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| 201 | start( e.originalEvent.touches[0] || e.originalEvent.changedTouches[0] ); |
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| 202 | } |
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| 203 | }) |
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| 204 | .on('touchmove.zoom', function (e) { |
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| 205 | e.preventDefault(); |
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| 206 | zoom.move( e.originalEvent.touches[0] || e.originalEvent.changedTouches[0] ); |
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| 207 | }); |
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| 208 | } |
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| 209 | |||
| 210 | if ($.isFunction(settings.callback)) { |
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| 211 | settings.callback.call(img); |
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| 212 | } |
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| 213 | }; |
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| 214 | |||
| 215 | img.src = settings.url; |
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| 216 | |||
| 217 | $(source).one('zoom.destroy', function(){ |
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| 218 | $(source).off(".zoom"); |
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| 219 | $img.remove(); |
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| 220 | }); |
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| 221 | }); |
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| 222 | }; |
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| 223 | |||
| 224 | $.fn.zoom.defaults = defaults; |
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| 225 | }(window.jQuery)); |