| 1 | define(["dojo", "dojo/fx"], function(dojo, fx) { |
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| 2 | |
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| 3 | var abs = "absolute", |
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| 4 | vis = "visibility", |
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| 5 | getViewport = function(){ |
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| 6 | // summary: Returns the dimensions and scroll position of the viewable area of a browser window |
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| 7 | var scrollRoot = (dojo.doc.compatMode == "BackCompat") ? dojo.body() : dojo.doc.documentElement, |
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| 8 | scroll = dojo._docScroll(); |
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| 9 | return { w: scrollRoot.clientWidth, h: scrollRoot.clientHeight, l: scroll.x, t: scroll.y }; |
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| 10 | } |
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| 11 | ; |
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| 12 | |
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| 13 | return dojo.declare("dojox.image.LightboxNano", null, { |
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| 14 | // summary: |
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| 15 | // A simple "nano" version of the lightbox. |
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| 16 | // |
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| 17 | // description: |
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| 18 | // Very lightweight lightbox which only displays a larger image. There is |
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| 19 | // no support for a caption or description. The lightbox can be closed by |
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| 20 | // clicking any where or pressing any key. This widget is intended to be |
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| 21 | // used on <a> and <img> tags. Upon creation, if the domNode is <img> tag, |
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| 22 | // then it is wrapped in an <a> tag, then a <div class="enlarge"> is placed |
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| 23 | // inside the <a> and can be styled to display an icon that the original |
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| 24 | // can be enlarged. |
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| 25 | // |
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| 26 | // example: |
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| 27 | // | <a dojoType="dojox.image.LightboxNano" href="/path/to/largeimage.jpg"><img src="/path/to/thumbnail.jpg"></a> |
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| 28 | // |
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| 29 | // example: |
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| 30 | // | <img dojoType="dojox.image.LightboxNano" src="/path/to/thumbnail.jpg" href="/path/to/largeimage.jpg"> |
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| 31 | |
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| 32 | // href: string |
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| 33 | // URL to the large image to show in the lightbox. |
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| 34 | href: "", |
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| 35 | |
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| 36 | // duration: int |
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| 37 | // The delay in milliseconds of the LightboxNano open and close animation. |
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| 38 | duration: 500, |
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| 39 | |
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| 40 | // preloadDelay: int |
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| 41 | // The delay in milliseconds after the LightboxNano is created before preloading the larger image. |
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| 42 | preloadDelay: 5000, |
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| 43 | |
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| 44 | constructor: function(/*Object?*/p, /*DomNode?*/n){ |
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| 45 | // summary: Initializes the DOM node and connect onload event |
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| 46 | var _this = this; |
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| 47 | |
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| 48 | dojo.mixin(_this, p); |
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| 49 | n = _this._node = dojo.byId(n); |
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| 50 | |
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| 51 | // if we have a origin node, then prepare it to show the LightboxNano |
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| 52 | if(n){ |
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| 53 | if(!/a/i.test(n.tagName)){ |
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| 54 | var a = dojo.create("a", { href: _this.href, "class": n.className }, n, "after"); |
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| 55 | n.className = ""; |
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| 56 | a.appendChild(n); |
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| 57 | n = a; |
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| 58 | } |
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| 59 | |
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| 60 | dojo.style(n, "position", "relative"); |
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| 61 | _this._createDiv("dojoxEnlarge", n); |
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| 62 | dojo.setSelectable(n, false); |
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| 63 | _this._onClickEvt = dojo.connect(n, "onclick", _this, "_load"); |
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| 64 | } |
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| 65 | |
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| 66 | if(_this.href){ |
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| 67 | setTimeout(function(){ |
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| 68 | (new Image()).src = _this.href; |
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| 69 | _this._hideLoading(); |
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| 70 | }, _this.preloadDelay); |
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| 71 | } |
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| 72 | }, |
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| 73 | |
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| 74 | destroy: function(){ |
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| 75 | // summary: Destroys the LightboxNano and it's DOM node |
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| 76 | var a = this._connects || []; |
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| 77 | a.push(this._onClickEvt); |
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| 78 | dojo.forEach(a, dojo.disconnect); |
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| 79 | dojo.destroy(this._node); |
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| 80 | }, |
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| 81 | |
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| 82 | _createDiv: function(/*String*/cssClass, /*DomNode*/refNode, /*boolean*/display){ |
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| 83 | // summary: Creates a div for the enlarge icon and loading indicator layers |
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| 84 | return dojo.create("div", { // DomNode |
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| 85 | "class": cssClass, |
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| 86 | style: { |
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| 87 | position: abs, |
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| 88 | display: display ? "" : "none" |
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| 89 | } |
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| 90 | }, refNode); |
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| 91 | }, |
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| 92 | |
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| 93 | _load: function(/*Event*/e){ |
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| 94 | // summary: Creates the large image and begins to show it |
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| 95 | var _this = this; |
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| 96 | |
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| 97 | e && dojo.stopEvent(e); |
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| 98 | |
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| 99 | if(!_this._loading){ |
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| 100 | _this._loading = true; |
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| 101 | _this._reset(); |
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| 102 | |
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| 103 | var i = _this._img = dojo.create("img", { |
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| 104 | style: { |
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| 105 | visibility: "hidden", |
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| 106 | cursor: "pointer", |
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| 107 | position: abs, |
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| 108 | top: 0, |
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| 109 | left: 0, |
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| 110 | zIndex: 9999999 |
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| 111 | } |
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| 112 | }, dojo.body()), |
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| 113 | ln = _this._loadingNode, |
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| 114 | n = dojo.query("img", _this._node)[0] || _this._node, |
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| 115 | a = dojo.position(n, true), |
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| 116 | c = dojo.contentBox(n), |
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| 117 | b = dojo._getBorderExtents(n) |
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| 118 | ; |
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| 119 | |
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| 120 | if(ln == null){ |
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| 121 | _this._loadingNode = ln = _this._createDiv("dojoxLoading", _this._node, true); |
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| 122 | var l = dojo.marginBox(ln); |
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| 123 | dojo.style(ln, { |
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| 124 | left: parseInt((c.w - l.w) / 2) + "px", |
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| 125 | top: parseInt((c.h - l.h) / 2) + "px" |
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| 126 | }); |
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| 127 | } |
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| 128 | |
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| 129 | c.x = a.x - 10 + b.l; |
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| 130 | c.y = a.y - 10 + b.t; |
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| 131 | _this._start = c; |
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| 132 | |
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| 133 | _this._connects = [dojo.connect(i, "onload", _this, "_show")]; |
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| 134 | |
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| 135 | i.src = _this.href; |
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| 136 | } |
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| 137 | }, |
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| 138 | |
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| 139 | _hideLoading: function(){ |
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| 140 | // summary: Hides the animated loading indicator |
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| 141 | if(this._loadingNode){ |
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| 142 | dojo.style(this._loadingNode, "display", "none"); |
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| 143 | } |
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| 144 | this._loadingNode = false; |
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| 145 | }, |
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| 146 | |
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| 147 | _show: function(){ |
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| 148 | // summary: The image is now loaded, calculate size and display |
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| 149 | var _this = this, |
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| 150 | vp = getViewport(), |
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| 151 | w = _this._img.width, |
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| 152 | h = _this._img.height, |
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| 153 | vpw = parseInt((vp.w - 20) * 0.9), |
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| 154 | vph = parseInt((vp.h - 20) * 0.9), |
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| 155 | dd = dojo.doc, |
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| 156 | bg = _this._bg = dojo.create("div", { |
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| 157 | style: { |
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| 158 | backgroundColor: "#000", |
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| 159 | opacity: 0.0, |
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| 160 | position: abs, |
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| 161 | zIndex: 9999998 |
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| 162 | } |
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| 163 | }, dojo.body()), |
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| 164 | ln = _this._loadingNode |
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| 165 | ; |
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| 166 | |
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| 167 | if(_this._loadingNode){ |
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| 168 | _this._hideLoading(); |
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| 169 | } |
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| 170 | dojo.style(_this._img, { |
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| 171 | border: "10px solid #fff", |
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| 172 | visibility: "visible" |
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| 173 | }); |
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| 174 | dojo.style(_this._node, vis, "hidden"); |
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| 175 | |
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| 176 | _this._loading = false; |
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| 177 | |
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| 178 | _this._connects = _this._connects.concat([ |
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| 179 | dojo.connect(dd, "onmousedown", _this, "_hide"), |
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| 180 | dojo.connect(dd, "onkeypress", _this, "_key"), |
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| 181 | dojo.connect(window, "onresize", _this, "_sizeBg") |
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| 182 | ]); |
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| 183 | |
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| 184 | if(w > vpw){ |
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| 185 | h = h * vpw / w; |
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| 186 | w = vpw; |
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| 187 | } |
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| 188 | if(h > vph){ |
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| 189 | w = w * vph / h; |
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| 190 | h = vph; |
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| 191 | } |
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| 192 | |
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| 193 | _this._end = { |
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| 194 | x: (vp.w - 20 - w) / 2 + vp.l, |
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| 195 | y: (vp.h - 20 - h) / 2 + vp.t, |
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| 196 | w: w, |
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| 197 | h: h |
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| 198 | }; |
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| 199 | |
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| 200 | _this._sizeBg(); |
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| 201 | |
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| 202 | dojo.fx.combine([ |
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| 203 | _this._anim(_this._img, _this._coords(_this._start, _this._end)), |
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| 204 | _this._anim(bg, { opacity: 0.5 }) |
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| 205 | ]).play(); |
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| 206 | }, |
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| 207 | |
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| 208 | _sizeBg: function(){ |
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| 209 | // summary: Resize the background to fill the page |
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| 210 | var dd = dojo.doc.documentElement; |
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| 211 | dojo.style(this._bg, { |
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| 212 | top: 0, |
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| 213 | left: 0, |
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| 214 | width: dd.scrollWidth + "px", |
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| 215 | height: dd.scrollHeight + "px" |
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| 216 | }); |
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| 217 | }, |
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| 218 | |
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| 219 | _key: function(/*Event*/e){ |
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| 220 | // summary: A key was pressed, so hide the lightbox |
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| 221 | dojo.stopEvent(e); |
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| 222 | this._hide(); |
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| 223 | }, |
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| 224 | |
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| 225 | _coords: function(/*Object*/s, /*Object*/e){ |
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| 226 | // summary: Returns animation parameters with the start and end coords |
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| 227 | return { // Object |
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| 228 | left: { start: s.x, end: e.x }, |
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| 229 | top: { start: s.y, end: e.y }, |
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| 230 | width: { start: s.w, end: e.w }, |
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| 231 | height: { start: s.h, end: e.h } |
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| 232 | }; |
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| 233 | }, |
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| 234 | |
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| 235 | _hide: function(){ |
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| 236 | // summary: Closes the lightbox |
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| 237 | var _this = this; |
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| 238 | dojo.forEach(_this._connects, dojo.disconnect); |
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| 239 | _this._connects = []; |
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| 240 | dojo.fx.combine([ |
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| 241 | _this._anim(_this._img, _this._coords(_this._end, _this._start), "_reset"), |
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| 242 | _this._anim(_this._bg, {opacity:0}) |
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| 243 | ]).play(); |
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| 244 | }, |
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| 245 | |
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| 246 | _reset: function(){ |
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| 247 | // summary: Destroys the lightbox |
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| 248 | dojo.style(this._node, vis, "visible"); |
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| 249 | dojo.destroy(this._img); |
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| 250 | dojo.destroy(this._bg); |
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| 251 | this._img = this._bg = null; |
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| 252 | this._node.focus(); |
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| 253 | }, |
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| 254 | |
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| 255 | _anim: function(/*DomNode*/node, /*Object*/args, /*Function*/onEnd){ |
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| 256 | // summary: Creates the lightbox open/close and background fadein/out animations |
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| 257 | return dojo.animateProperty({ // dojo.Animation |
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| 258 | node: node, |
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| 259 | duration: this.duration, |
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| 260 | properties: args, |
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| 261 | onEnd: onEnd ? dojo.hitch(this, onEnd) : null |
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| 262 | }); |
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| 263 | }, |
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| 264 | |
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| 265 | show: function(/*Object?*/args){ |
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| 266 | // summary: |
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| 267 | // Shows this LightboxNano programatically. Allows passing a new href and |
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| 268 | // a programatic origin. |
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| 269 | // |
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| 270 | // args: Object? |
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| 271 | // An object with optional members of `href` and `origin`. |
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| 272 | // `origin` can be be a String|Id of a DomNode to use when |
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| 273 | // animating the openeing of the image (the 'box' effect starts |
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| 274 | // from this origin point. eg: { origin: e.target }) |
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| 275 | // If there's no origin, it will use the center of the viewport. |
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| 276 | // The `href` member is a string URL for the image to be |
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| 277 | // displayed. Omiting either of these members will revert to |
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| 278 | // the default href (which could be absent in some cases) and |
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| 279 | // the original srcNodeRef for the widget. |
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| 280 | args = args || {}; |
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| 281 | this.href = args.href || this.href; |
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| 282 | |
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| 283 | var n = dojo.byId(args.origin), |
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| 284 | vp = getViewport(); |
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| 285 | |
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| 286 | // if we don't have a valid origin node, then create one as a reference |
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| 287 | // that is centered in the viewport |
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| 288 | this._node = n || dojo.create("div", { |
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| 289 | style: { |
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| 290 | position: abs, |
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| 291 | width: 0, |
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| 292 | hieght: 0, |
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| 293 | left: (vp.l + (vp.w / 2)) + "px", |
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| 294 | top: (vp.t + (vp.h / 2)) + "px" |
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| 295 | } |
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| 296 | }, dojo.body()) |
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| 297 | ; |
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| 298 | |
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| 299 | this._load(); |
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| 300 | |
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| 301 | // if we don't have a valid origin node, then destroy the centered reference |
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| 302 | // node since load() has already been called and it's not needed anymore. |
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| 303 | if(!n){ |
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| 304 | dojo.destroy(this._node); |
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| 305 | } |
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| 306 | } |
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| 307 | }); |
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| 308 | |
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| 309 | }); |
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