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//>>built
define("dojox/image/LightboxNano", ["dojo", "dojo/fx"], function(dojo, fx) {
var abs = "absolute",
vis = "visibility",
getViewport = function(){
// summary: Returns the dimensions and scroll position of the viewable area of a browser window
var scrollRoot = (dojo.doc.compatMode == "BackCompat") ? dojo.body() : dojo.doc.documentElement,
scroll = dojo._docScroll();
return { w: scrollRoot.clientWidth, h: scrollRoot.clientHeight, l: scroll.x, t: scroll.y };
}
;
return dojo.declare("dojox.image.LightboxNano", null, {
// summary:
// A simple "nano" version of the lightbox.
//
// description:
// Very lightweight lightbox which only displays a larger image. There is
// no support for a caption or description. The lightbox can be closed by
// clicking any where or pressing any key. This widget is intended to be
// used on <a> and <img> tags. Upon creation, if the domNode is <img> tag,
// then it is wrapped in an <a> tag, then a <div class="enlarge"> is placed
// inside the <a> and can be styled to display an icon that the original
// can be enlarged.
//
// example:
// | <a dojoType="dojox.image.LightboxNano" href="/path/to/largeimage.jpg"><img src="/path/to/thumbnail.jpg"></a>
//
// example:
// | <img dojoType="dojox.image.LightboxNano" src="/path/to/thumbnail.jpg" href="/path/to/largeimage.jpg">
// href: string
// URL to the large image to show in the lightbox.
href: "",
// duration: int
// The delay in milliseconds of the LightboxNano open and close animation.
duration: 500,
// preloadDelay: int
// The delay in milliseconds after the LightboxNano is created before preloading the larger image.
preloadDelay: 5000,
constructor: function(/*Object?*/p, /*DomNode?*/n){
// summary: Initializes the DOM node and connect onload event
var _this = this;
dojo.mixin(_this, p);
n = _this._node = dojo.byId(n);
// if we have a origin node, then prepare it to show the LightboxNano
if(n){
if(!/a/i.test(n.tagName)){
var a = dojo.create("a", { href: _this.href, "class": n.className }, n, "after");
n.className = "";
a.appendChild(n);
n = a;
}
dojo.style(n, "position", "relative");
_this._createDiv("dojoxEnlarge", n);
dojo.setSelectable(n, false);
_this._onClickEvt = dojo.connect(n, "onclick", _this, "_load");
}
if(_this.href){
setTimeout(function(){
(new Image()).src = _this.href;
_this._hideLoading();
}, _this.preloadDelay);
}
},
destroy: function(){
// summary: Destroys the LightboxNano and it's DOM node
var a = this._connects || [];
a.push(this._onClickEvt);
dojo.forEach(a, dojo.disconnect);
dojo.destroy(this._node);
},
_createDiv: function(/*String*/cssClass, /*DomNode*/refNode, /*boolean*/display){
// summary: Creates a div for the enlarge icon and loading indicator layers
return dojo.create("div", { // DomNode
"class": cssClass,
style: {
position: abs,
display: display ? "" : "none"
}
}, refNode);
},
_load: function(/*Event*/e){
// summary: Creates the large image and begins to show it
var _this = this;
e && dojo.stopEvent(e);
if(!_this._loading){
_this._loading = true;
_this._reset();
var i = _this._img = dojo.create("img", {
style: {
visibility: "hidden",
cursor: "pointer",
position: abs,
top: 0,
left: 0,
zIndex: 9999999
}
}, dojo.body()),
ln = _this._loadingNode,
n = dojo.query("img", _this._node)[0] || _this._node,
a = dojo.position(n, true),
c = dojo.contentBox(n),
b = dojo._getBorderExtents(n)
;
if(ln == null){
_this._loadingNode = ln = _this._createDiv("dojoxLoading", _this._node, true);
var l = dojo.marginBox(ln);
dojo.style(ln, {
left: parseInt((c.w - l.w) / 2) + "px",
top: parseInt((c.h - l.h) / 2) + "px"
});
}
c.x = a.x - 10 + b.l;
c.y = a.y - 10 + b.t;
_this._start = c;
_this._connects = [dojo.connect(i, "onload", _this, "_show")];
i.src = _this.href;
}
},
_hideLoading: function(){
// summary: Hides the animated loading indicator
if(this._loadingNode){
dojo.style(this._loadingNode, "display", "none");
}
this._loadingNode = false;
},
_show: function(){
// summary: The image is now loaded, calculate size and display
var _this = this,
vp = getViewport(),
w = _this._img.width,
h = _this._img.height,
vpw = parseInt((vp.w - 20) * 0.9),
vph = parseInt((vp.h - 20) * 0.9),
dd = dojo.doc,
bg = _this._bg = dojo.create("div", {
style: {
backgroundColor: "#000",
opacity: 0.0,
position: abs,
zIndex: 9999998
}
}, dojo.body()),
ln = _this._loadingNode
;
if(_this._loadingNode){
_this._hideLoading();
}
dojo.style(_this._img, {
border: "10px solid #fff",
visibility: "visible"
});
dojo.style(_this._node, vis, "hidden");
_this._loading = false;
_this._connects = _this._connects.concat([
dojo.connect(dd, "onmousedown", _this, "_hide"),
dojo.connect(dd, "onkeypress", _this, "_key"),
dojo.connect(window, "onresize", _this, "_sizeBg")
]);
if(w > vpw){
h = h * vpw / w;
w = vpw;
}
if(h > vph){
w = w * vph / h;
h = vph;
}
_this._end = {
x: (vp.w - 20 - w) / 2 + vp.l,
y: (vp.h - 20 - h) / 2 + vp.t,
w: w,
h: h
};
_this._sizeBg();
dojo.fx.combine([
_this._anim(_this._img, _this._coords(_this._start, _this._end)),
_this._anim(bg, { opacity: 0.5 })
]).play();
},
_sizeBg: function(){
// summary: Resize the background to fill the page
var dd = dojo.doc.documentElement;
dojo.style(this._bg, {
top: 0,
left: 0,
width: dd.scrollWidth + "px",
height: dd.scrollHeight + "px"
});
},
_key: function(/*Event*/e){
// summary: A key was pressed, so hide the lightbox
dojo.stopEvent(e);
this._hide();
},
_coords: function(/*Object*/s, /*Object*/e){
// summary: Returns animation parameters with the start and end coords
return { // Object
left: { start: s.x, end: e.x },
top: { start: s.y, end: e.y },
width: { start: s.w, end: e.w },
height: { start: s.h, end: e.h }
};
},
_hide: function(){
// summary: Closes the lightbox
var _this = this;
dojo.forEach(_this._connects, dojo.disconnect);
_this._connects = [];
dojo.fx.combine([
_this._anim(_this._img, _this._coords(_this._end, _this._start), "_reset"),
_this._anim(_this._bg, {opacity:0})
]).play();
},
_reset: function(){
// summary: Destroys the lightbox
dojo.style(this._node, vis, "visible");
dojo.destroy(this._img);
dojo.destroy(this._bg);
this._img = this._bg = null;
this._node.focus();
},
_anim: function(/*DomNode*/node, /*Object*/args, /*Function*/onEnd){
// summary: Creates the lightbox open/close and background fadein/out animations
return dojo.animateProperty({ // dojo.Animation
node: node,
duration: this.duration,
properties: args,
onEnd: onEnd ? dojo.hitch(this, onEnd) : null
});
},
show: function(/*Object?*/args){
// summary:
// Shows this LightboxNano programatically. Allows passing a new href and
// a programatic origin.
//
// args: Object?
// An object with optional members of `href` and `origin`.
// `origin` can be be a String|Id of a DomNode to use when
// animating the openeing of the image (the 'box' effect starts
// from this origin point. eg: { origin: e.target })
// If there's no origin, it will use the center of the viewport.
// The `href` member is a string URL for the image to be
// displayed. Omiting either of these members will revert to
// the default href (which could be absent in some cases) and
// the original srcNodeRef for the widget.
args = args || {};
this.href = args.href || this.href;
var n = dojo.byId(args.origin),
vp = getViewport();
// if we don't have a valid origin node, then create one as a reference
// that is centered in the viewport
this._node = n || dojo.create("div", {
style: {
position: abs,
width: 0,
hieght: 0,
left: (vp.l + (vp.w / 2)) + "px",
top: (vp.t + (vp.h / 2)) + "px"
}
}, dojo.body())
;
this._load();
// if we don't have a valid origin node, then destroy the centered reference
// node since load() has already been called and it's not needed anymore.
if(!n){
dojo.destroy(this._node);
}
}
});
});
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