/* 
   ======================================================== 
        script: image-flow 
        author: Gerard Ferrandez - [Ge1doot] 
          date: March 15, 2008 
          site: http://www.dhteumeuleu.com 
       license: CC-BY-NC - do not remove this notice 
   ======================================================== 
*/ 
 
var imf = function () { 
	/* //////////// ==== private methods ==== //////////// */ 
	var lf = 0; 
	var instances = []; 
	/* ===== custom getElementsByClass ==== */ 
	function getElementsByClass (object, tag, className) { 
		var o = object.getElementsByTagName(tag); 
		for ( var i = 0, n = o.length, ret = []; i < n; i++) 
			if (o[i].className == className) ret.push(o[i]); 
		if (ret.length == 1) ret = ret[0]; 
		return ret; 
	} 
	/* ===== crossbrowsers addEvent ==== */ 
	function addEvent (o, e, f) { 
		if (window.addEventListener) o.addEventListener(e, f, false); 
		else if (window.attachEvent) r = o.attachEvent('on' + e, f); 
	} 
	/* ===== create image reflexion ==== */ 
	function createReflexion (cont, img) { 
		var flx = false; 
		if (document.createElement("canvas").getContext) { 
			/* ---- canvas ---- */ 
			flx = document.createElement("canvas"); 
			flx.width = img.width; 
			flx.height = img.height; 
			var context = flx.getContext("2d"); 
			context.translate(0, img.height); 
			context.scale(1, -1); 
			context.drawImage(img, 0, 0, img.width, img.height); 
			flx.style.opacity = '0.35'; 
		} else { 
			/* ---- DXImageTransform ---- */ 
			flx     = document.createElement('img'); 
			flx.src = img.src; 
			flx.style.filter = 'flipv progid:DXImageTransform.Microsoft.Alpha(' + 
			                   'opacity=50, style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy=' + 
							   (img.height * .25) + ')'; 
		} 
		/* ---- insert Reflexion ---- */ 
		flx.style.position = 'absolute'; 
		flx.style.left     = '-4000px'; 
		cont.appendChild(flx); 
		return flx; 
	} 
	/* //////////// ==== ImageFlow Constructor ==== //////////// */ 
	function ImageFlow(oCont, horizon, size, zoom, border, start, interval) { 
		this.diapos     = []; 
		this.scr        = false; 
		this.size       = size; 
		this.zoom       = zoom; 
		this.horizon    = horizon; 
		this.bdw        = border; 
		this.oCont      = oCont; 
		this.oc         = document.getElementById(oCont); 
		this.scrollbar  = getElementsByClass(this.oc,   'div', 'scrollbar'); 
		this.text       = getElementsByClass(this.oc,   'div', 'text'); 
		this.title      = getElementsByClass(this.text, 'div', 'title'); 
		this.legend     = getElementsByClass(this.text, 'div', 'legend'); 
		this.bar        = getElementsByClass(this.oc,   'img', 'bar'); 
		this.arL        = getElementsByClass(this.oc,   'img', 'arrow-left'); 
		this.arR        = getElementsByClass(this.oc,   'img', 'arrow-right'); 
		this.bw         = this.bar.width; 
		this.alw        = this.arL.width - 5; 
		this.arw        = this.arR.width - 5; 
		this.bar.parent = this.oc.parent  = this; 
		this.arL.parent = this.arR.parent = this; 
		this.view       = this.back       = -1; 
		this.time_start = start * 62.5 || 0; 
		this.time_inter = interval * 62.5 || 0; 
		this.time_out   = this.time_start; 
		this.time       = 0; 
		this.time_dir   = 1; 
		this.resize(); 
		this.oc.onselectstart = function () { return false; } 
		/* ---- create images ---- */ 
		var img   = getElementsByClass(this.oc, 'div', 'bank').getElementsByTagName('a'); 
		this.NF = img.length; 
		for (var i = 0, o; o = img[i]; i++) { 
			this.diapos[i] = new Diapo(this, i, 
										o.href, 
										o.title || '- ' + i + ' -', 
										o.innerHTML || o.href, 
										o.rel || '', 
										o.target || '_self' 
			); 
		} 
		/* ==== add mouse wheel events ==== */ 
		if (window.addEventListener) 
			this.oc.addEventListener('DOMMouseScroll', function(e) { 
				this.parent.scroll(-e.detail); 
				return false; 
			}, false); 
		this.oc.onmousewheel = function () { 
			this.parent.scroll(event.wheelDelta); 
			return false; 
		} 
		/* ==== scrollbar drag N drop ==== */ 
		this.bar.onmousedown = function (e) { 
			if (!e) e = window.event; 
			var scl = e.screenX - this.offsetLeft; 
			var self = this.parent; 
			/* ---- move bar ---- */ 
			this.parent.oc.onmousemove = function (e) { 
				if (!e) e = window.event; 
				self.bar.style.left = Math.round(Math.min((self.ws - self.arw - self.bw), Math.max(self.alw, e.screenX - scl))) + 'px'; 
				self.view = Math.round(((e.screenX - scl) ) / (self.ws - self.alw - self.arw - self.bw) * (self.NF-1)); 
				if (self.view != self.back) self.calc(); 
				return false; 
			} 
			/* ---- release scrollbar ---- */ 
			this.parent.oc.onmouseup = function (e) { 
				self.oc.onmousemove = null; 
				return false; 
			} 
			return false; 
		} 
		/* ==== right arrow ==== */ 
		this.arR.onclick = this.arR.ondblclick = function () { 
			if (this.parent.view < this.parent.NF - 1) 
				this.parent.calc(1); 
		} 
		/* ==== Left arrow ==== */ 
		this.arL.onclick = this.arL.ondblclick = function () { 
			if (this.parent.view > 0) 
				this.parent.calc(-1); 
		} 
	} 
	/* //////////// ==== ImageFlow prototype ==== //////////// */ 
	ImageFlow.prototype = { 
		/* ==== targets ==== */ 
		calc : function (inc) { 
			if (inc) { 
				this.view += inc; 
				/* ---- stop autoscroll ---- */ 
				this.time = 0; 
				this.time_out = this.time_start; 
			} 
			var tw = 0; 
			var lw = 0; 
			var o = this.diapos[this.view]; 
			if (o && o.loaded) { 
				/* ---- reset ---- */ 
				var ob = this.diapos[this.back]; 
				if (ob && ob != o) { 
					ob.img.className = 'diapo'; 
					ob.z1 = 1; 
				} 
				/* ---- update legend ---- */ 
				this.title.replaceChild(document.createTextNode(o.title), this.title.firstChild); 
				this.legend.replaceChild(document.createTextNode(o.text), this.legend.firstChild); 
				/* ---- update hyperlink ---- */ 
				if (o.url) { 
					o.img.className = 'diapo link'; 
					window.status = 'hyperlink: ' + o.url; 
				} else { 
					o.img.className = 'diapo'; 
					window.status = ''; 
				} 
				/* ---- calculate target sizes & positions ---- */ 
				if(o.r < 1) o.w1 = Math.min(o.iw, this.wh * .8, Math.round(this.ht * this.horizon / o.r)) * o.z1; 
				else o.w1 = Math.round(this.ht * this.horizon / o.r) * o.z1; 
				var x0 = o.x1 = (this.wh * .5) - (o.w1 * .5); 
				var x = x0 + o.w1 + this.bdw; 
				for (var i = this.view + 1, o; o = this.diapos[i]; i++) { 
					if (o.loaded) { 
						o.x1 = x; 
						o.w1 = (this.ht / o.r) * this.size; 
						x   += o.w1 + this.bdw; 
						tw  += o.w1 + this.bdw; 
					} 
				} 
				x = x0 - this.bdw; 
				for (var i = this.view - 1, o; o = this.diapos[i]; i--) { 
					if (o.loaded) { 
						o.w1 = (this.ht / o.r) * this.size; 
						o.x1 = x - o.w1; 
						x   -= o.w1 + this.bdw; 
						tw  += o.w1 + this.bdw; 
						lw  += o.w1 + this.bdw; 
					} 
				} 
				/* ---- move scrollbar ---- */ 
				if (!this.scr && tw) { 
					var r = (this.ws - this.alw - this.arw - this.bw) / tw; 
					this.bar.style.left = Math.round(this.alw + lw * r) + 'px'; 
				} 
				/* ---- save preview view ---- */ 
				this.back = this.view; 
			} 
		}, 
		/* ==== mousewheel scrolling ==== */ 
		scroll : function (sc) { 
			if (sc < 0) { 
				if (this.view < this.NF - 1) this.calc(1); 
			} else { 
				if (this.view > 0) this.calc(-1); 
			} 
		}, 
		/* ==== resize  ==== */ 
		resize : function () { 
			this.wh = this.oc.clientWidth; 
			this.ht = this.oc.clientHeight; 
			this.ws = this.scrollbar.offsetWidth; 
			this.calc(); 
			this.run(true); 
		}, 
		/* ==== animation loop ==== */ 
		run : function (res) { 
			/* ---- move all images ---- */ 
			var i = this.NF; 
			while (i--) this.diapos[i].move(res); 
			/* ---- autoscroll ---- */ 
			if (this.time_out) { 
				this.time++; 
				if (this.time > this.time_out) { 
					this.view += this.time_dir; 
					if (this.view >= this.NF || this.view < 0) { 
						this.time_dir = -this.time_dir; 
						this.view += this.time_dir * 2; 
					} 
					this.calc(); 
					this.time = 0; 
					this.time_out = this.time_inter; 
				} 
			} 
		} 
	} 
	/* //////////// ==== Diapo Constructor ==== //////////// */ 
	Diapo = function (parent, N, src, title, text, url, target) { 
		this.parent        = parent; 
		this.loaded        = false; 
		this.title         = title; 
		this.text          = text; 
		this.url           = url; 
		this.target        = target; 
		this.N             = N; 
		this.img           = document.createElement('img'); 
		this.img.src       = src; 
		this.img.parent    = this; 
		this.img.className = 'diapo'; 
		this.x0            = this.parent.oc.clientWidth; 
		this.x1            = this.x0; 
		this.w0            = 0; 
		this.w1            = 0; 
		this.z1            = 1; 
		this.z2            = 0; 
		this.img.parent    = this; 
		this.img.onclick   = function() { this.parent.click(); } 
		this.parent.oc.appendChild(this.img); 
		/* ---- display external link ---- */ 
		if (url) { 
			this.img.onmouseover = function () { this.className = 'diapo link';	} 
			this.img.onmouseout  = function () { this.className = 'diapo'; } 
		} 
	} 
	/* //////////// ==== Diapo prototype ==== //////////// */ 
	Diapo.prototype = { 
		/* ==== HTML rendering ==== */ 
		move : function (res) { 
			var that = this.parent; 
			if (this.loaded) { 
				var sx = this.x1 - this.x0; 
				var sw = this.w1 - this.w0; 
				if (Math.abs(sx) > 2 || Math.abs(sw) > 2 || res) { 
					/* ---- paint only when moving ---- */ 
					this.x0 += sx * .1; 
					this.w0 += sw * .1; 
					var h = this.w0 * this.r; 
					this.z2 = (that.ht * that.horizon + 1 - this.z2 - h) *.5; 
					if (this.x0 < that.wh && this.x0 + this.w0 > 0) { 
						/* ---- paint only visible images ---- */ 
						this.visible = true; 
						var o = this.img.style; 
						/* ---- diapo ---- */ 
						o.left   = Math.round(this.x0) + 'px'; 
						o.bottom = Math.floor(that.ht * (1 - that.horizon) + this.z2) + 'px'; 
						o.width  = Math.round(this.w0) + 'px'; 
						o.height = Math.floor(h) + 'px'; 
						/* ---- reflexion ---- */ 
						if (this.flx) { 
							var o = this.flx.style; 
							o.left   = Math.round(this.x0) + 'px'; 
							o.top    = Math.ceil(that.ht * that.horizon + 1 - this.z2) + 'px'; 
							o.width  = Math.round(this.w0) + 'px'; 
							o.height = Math.floor(h) + 'px'; 
						} 
					} else { 
						/* ---- disable invisible images ---- */ 
						if (this.visible) { 
							this.visible = false; 
							this.img.style.width = '0px'; 
							if (this.flx) this.flx.style.width = '0px'; 
						} 
					} 
				} 
			} else { 
				/* ==== image onload ==== */ 
				if (this.img.complete && this.img.width) { 
					/* ---- get size image ---- */ 
					this.iw     = this.img.width; 
					this.ih     = this.img.height; 
					this.r      = this.ih / this.iw; 
					this.loaded = true; 
					/* ---- create reflexion ---- */ 
					this.flx    = createReflexion(that.oc, this.img); 
					if (that.view < 0) that.view = this.N; 
					else if (this.N == 0) that.view = this.N; 
					that.calc(); 
				} 
			} 
		}, 
		/* ==== diapo onclick ==== */ 
		click : function () { 
			/* ---- stop autoscroll ---- */ 
			this.parent.time = 0; 
			this.parent.time_out = this.parent.time_start; 
			if (this.parent.view == this.N) { 
				/* ---- click on zoomed diapo ---- */ 
				if (this.url) { 
					/* ---- open hyperlink ---- */ 
					window.open(this.url, this.target); 
				} else { 
					/* ---- zoom in/out ---- */ 
					this.z1 = this.z1 == 1 ? this.parent.zoom : 1; 
					this.parent.calc(); 
				} 
			} else { 
				/* ---- select diapo ---- */ 
				this.parent.view = this.N; 
				this.parent.calc(); 
			} 
			return false; 
		} 
	} 
	/* //////////// ==== public methods ==== //////////// */ 
	return { 
		/* ==== initialize script ==== */ 
		create : function (div, horizon, size, zoom, border, start, interval) { 
			/* ---- instanciate imageFlow ---- */ 
			var load = function () { 
				var loaded = false; 
				var i = instances.length; 
				while (i--) if (instances[i].oCont == div) loaded = true; 
				if (!loaded) { 
					/* ---- push new imageFlow instance ---- */ 
					instances.push( 
						new ImageFlow(div, horizon, size, zoom, border, start, interval) 
					); 
					/* ---- init script (once) ---- */ 
					if (!imf.initialized) { 
						imf.initialized = true; 
						/* ---- window resize event ---- */ 
						addEvent(window, 'resize', function () { 
							var i = instances.length; 
							while (i--) instances[i].resize(); 
						}); 
						/* ---- stop drag N drop ---- */ 
						addEvent(document.getElementById(div), 'mouseout', function (e) { 
							if (!e) e = window.event; 
							var tg = e.relatedTarget || e.toElement; 
							if (tg && tg.tagName == 'HTML') { 
								var i = instances.length; 
								while (i--) instances[i].oc.onmousemove = null; 
							} 
							return false; 
						}); 
						/* ---- set interval loop ---- */ 
						setInterval(function () { 
							var i = instances.length; 
							while (i--) instances[i].run(); 
						}, 16); 
					} 
				} 
			} 
			/* ---- window onload event ---- */ 
			addEvent(window, 'load', function () { load(); }); 
		} 
	} 
}(); 
 
/* ==== create imageFlow ==== */ 
//          div ID, horizon, size, zoom, border, autoscroll_start, autoscroll_interval 
imf.create("imageFlow", .77, 0.20, 1.8, 20, 8, 4);