/*
Licencováno pod MIT Licencí

© 2008 Seznam.cz, a.s.

Tímto se uděluje bezúplatná nevýhradní licence k oprávnění užívat Software,
časově i místně neomezená, v souladu s příslušnými ustanoveními autorského zákona.

Nabyvatel/uživatel, který obdržel kopii tohoto softwaru a další přidružené 
soubory (dále jen „software“) je oprávněn k nakládání se softwarem bez 
jakýchkoli omezení, včetně bez omezení práva software užívat, pořizovat si 
z něj kopie, měnit, sloučit, šířit, poskytovat zcela nebo zčásti třetí osobě 
(podlicence) či prodávat jeho kopie, za následujících podmínek:

- výše uvedené licenční ujednání musí být uvedeno na všech kopiích nebo 
podstatných součástech Softwaru.

- software je poskytován tak jak stojí a leží, tzn. autor neodpovídá 
za jeho vady, jakož i možné následky, ledaže věc nemá vlastnost, o níž autor 
prohlásí, že ji má, nebo kterou si nabyvatel/uživatel výslovně vymínil.



Licenced under the MIT License

Copyright (c) 2008 Seznam.cz, a.s.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

/**
 * @overview color picker
 * @version 1.0
 * @author zara
*/   

/**
 * @class Color Picker, zpravidla neni treba rucne instantializovat
 * @param {Object} optObj asociativni pole parametru, muze obsahovat tyto hodnoty:
 *	 <ul>
 *		<li><em>imagePath</em> - cesta k obrazkum s lomitkem na konci, default "img/"</li>
 *   	<li><em>windowOptions</em> - pole nastaveni pro Window</li>
 *   	<li><em>paletteSize</em> - pocet bunek v palete (jedna strana)</li>
 *   	<li><em>labels</em> - pole popisku tabu</li>
 *   	<li><em>ok</em> - popisek tlacitka OK</li>
 *   	<li><em>cancel</em> - popisek tlacitka Cancel</li>
 * @constructor
 */
SZN.ColorPicker = SZN.ClassMaker.makeClass({
	NAME:"ColorPicker",
	VERSION:"1.0",
	CLASS:"class",
	IMPLEMENT:SZN.SigInterface,
	DEPEND:[{
		sClass:SZN.Window,
		ver:"1.0"
	},{
		sClass:SZN.Tabs,
		ver:"1.0"
	}]
});

SZN.ColorPicker.prototype.$constructor = function(optObj) {
	this.options = {
		imagePath:"img/",
		windowOptions:{},
		paletteSize:8,
		labels:["Paleta","Duha"],
		ok:"OK",
		cancel:"Cancel"
	}
	for (var p in optObj) { this.options[p] = optObj[p]; }
	
	this.ec = [];
	this.dom = {};
	
	this.mode = 0;
	
	this.dim = 179;
	this.width = this.dim + 20 + 20 + 4;
	
	this.moving = 0;
	
	this._build();
	this.tabs.go(0);
	this.color = new SZN.Color();
	this.color.setHSV(0,1,0);
	this._sync();
	this._hide();
	document.body.insertBefore(this.dom.container,document.body.firstChild);
	this.ec.push(SZN.Events.addListener(window,"unload",this,"$destructor",false,true));
}

SZN.ColorPicker.prototype.$destructor = function() {
	for (var i=0;i<this.ec.length;i++) {
		SZN.Events.removeListener(this.ec[i]);
	}
	this.color.$destructor();
	this.tabs.$destructor();
	this.window.$destructor();
	for (var i=0;i<this.cache.length;i++){ 
		var c = this.cache[i][1];
		c.$destructor();
	}
	for (var p in this) { this[p] = null; }
}

/**
 * Staticka funkce, ktera provaze ovladaci prvek s color pickerem a inputem
 * @param {Object} cp instance pickeru
 * @param {Object} clickElm dom node, po jehoz kliknuti se color picker objevi
 * @param {Object} targetElm dom node (typicky input[type="text"]), jehoz vlastnost .value cp ovlada
 */
SZN.ColorPicker.manage = function(cp, clickElm, targetElm) { /* setup picker for two elements */
	var callback = function(color) { targetElm.value = color.x; }
	var click = function(e,elm) { 
		var pos = SZN.Dom.getBoxPosition(clickElm);
		var x = pos.left;
		var y = pos.top + clickElm.offsetHeight + 1;
		cp.pick(x,y,targetElm.value,callback);
	}
	cp.ec.push(SZN.Events.addListener(clickElm,"click",window,click,false,true));
}

/**
 * Doporucena jedina funkce na tvorbu color pickeru;
 * vytvori ovladaci prvek (obrazek | button), ktery po kliknuti zobrazi color picker, jez ovlada zadany input
 * @param {String} imageUrl URL obrazku, ktery se pouzije. Pokud je false, namisto obrazku vznikne button
 * @param {String} label pokud je vytvaren obrazek, toto je jeho alt text. Pokud je vytvaren button, 
 *   toto je jeho popisek
 * @param {Object} optObj asociativni pole parametru pro color picker
 * @param {String} id1...idN libovolne mnozstvi idecek pro inputy, na ktere chceme aplikovat color picker
 */
SZN.ColorPicker.setup = function(imageUrl, label, optObj) { /* setup color picker for a variable amount of text fields */
	var cp = new SZN.ColorPicker(optObj);
	for (var i=3;i<arguments.length;i++) {
		var click = false;
		var input = SZN.gEl(arguments[i]);
		if (imageUrl) {
			click = SZN.cEl("img",false,"cp-launcher",{cursor:"pointer"});
			click.src = imageUrl;
			click.alt = label;
			click.title = label;
		} else {
			click = SZN.cEl("input",false,"cp-launcher");
			click.type = "button";
			click.value = label;
		}
		input.parentNode.insertBefore(click,input.nextSibling);
		SZN.ColorPicker.manage(cp,click,input);
	}
	return cp;
}

/**
 * vrati prave vybranou barvu jako retezec ve tvaru #??????
 */
SZN.ColorPicker.prototype.getColor = function() {
	return this.color.x;
}

SZN.ColorPicker.prototype.setColor = function(c) {
	this.color.parse(c);
	this._sync();
}

SZN.ColorPicker.prototype.pick = function(x,y,color,cb) {
	this.cb = cb;
	this._show();
	this.dom.container.style.left = x+"px";
	this.dom.container.style.top = y+"px";
	
	if (!color) { return; }
	/* parse color */
	this.color.parse(color);
	if (this.color.v == 0) {
		this.color.setHSV(this.color.h,1,0);
	}
	this._sync();
}

SZN.ColorPicker.prototype._li = function(label) {
	var li = SZN.cEl("li",false,false,{styleFloat:"left",cssFloat:"left",cursor:"pointer"});
	li.innerHTML = label;
	return li;
}

SZN.ColorPicker.prototype._build = function() {
	this.window = new SZN.Window(this.options.windowOptions);
	this.dom.container = this.window.container;
	this.dom.container.style.position = "absolute";

	this.dom.content = SZN.cEl("div",false,"color-picker",{position:"relative"});
	this.window.content.appendChild(this.dom.content);
	this.dom.content.style.width = this.width + "px";
	
	this.ec.push(SZN.Events.addListener(this.dom.container, "mousedown", SZN.Events.cancelDef,false,false,true));
	
	this._buildPalette();
	this._buildRainbow();
	this._buildMixer();
	
	this.dom.ul = SZN.cEl("ul",false,false,{listStyleType:"none",margin:"0px",padding:"0px"});
	this.dom.top = SZN.cEl("div",false,false,{position:"relative"});
	
	this.tabs = new SZN.Tabs(this.dom.top,{},this,"_switch");
	var li = this._li(this.options.labels[0]);
	this.dom.ul.appendChild(li);
	this.tabs.addTab(li,this.dom.palette);
	var li = this._li(this.options.labels[1]);
	this.dom.ul.appendChild(li);
	this.tabs.addTab(li,this.dom.rainbow);

	var margin = "25%";
	if (SZN.Browser.client == "safari") { margin = "20%"; }
	
	this.dom.ok = SZN.cEl("input",false,'color-picker-button',{marginLeft:margin,cursor:"pointer"});
	this.dom.ok.type = "button";
	this.dom.ok.value = this.options.ok;
	this.dom.cancel = SZN.cEl("input",false,'color-picker-button',{marginRight:margin,cursor:"pointer"});
	this.dom.cancel.type = "button";
	this.dom.cancel.value = this.options.cancel;
	
	SZN.Dom.append([this.dom.content,this.dom.ul,this.dom.top,this.dom.mixer,this.dom.ok,this.dom.cancel]);
	
	var clear = SZN.cEl("div",false,false,{clear:"both"});
	this.dom.content.appendChild(clear);
	
	this.ec.push(SZN.Events.addListener(this.dom.ok,"click",this,"_ok",false,true));
	this.ec.push(SZN.Events.addListener(this.dom.cancel,"click",this,"_cancel",false,true));
}

SZN.ColorPicker.prototype._buildPalette = function() {
	this.cache = [];
	var padding = 2;
	var width = Math.floor((this.width - 2*padding) / this.options.paletteSize) - 2*padding - 1;
	var height = Math.floor(width*this.dim/this.width) - 1;
	
	this.dom.palette = SZN.cEl("table",false,false,{borderCollapse:"collapse",height:(this.dim+2)+"px"});
	var tb = SZN.cEl("tbody");
	this.dom.palette.appendChild(tb);
	for (var i=0;i<this.options.paletteSize;i++) {
		var tr = SZN.cEl("tr");
		tb.appendChild(tr);
		for (var j=0;j<this.options.paletteSize;j++) {
			var td = SZN.cEl("td",false,false,{padding:padding+"px"});
			var div = SZN.cEl("div",false,false,{width:width+"px",height:height+"px",cursor:"pointer",border:"1px solid #000"});
			var col = new SZN.Color();
			col.generatePalette(j,i,this.options.paletteSize);
			this.cache.push([div,col]);
			div.style.backgroundColor = col.x;
			SZN.Dom.append([tr,td],[td,div]);
		}
	}
	this.ec.push(SZN.Events.addListener(this.dom.palette,"click",this,"_clickPalette",false,true));
	this.ec.push(SZN.Events.addListener(this.dom.palette,"dblclick",this,"_dblClickPalette",false,true));
}

SZN.ColorPicker.prototype._buildRainbow = function() {
	this.dom.rainbow = SZN.cEl("div",false,false,{position:"relative"});
	this.dom.hv = SZN.cEl("div",false,false,{width:this.dim+"px",height:this.dim+"px",position:"relative",border:"1px solid #000",cursor:"crosshair"});
	this.dom.hv.style.backgroundImage = "url("+this.options.imagePath + "hv.png)";
	this.dom.s = SZN.cEl("div",false,false,{position:"absolute",left:(this.dim+10)+"px",top:"0px",border:"1px solid #000"});
	this.dom.gradient = SZN.cEl("img");
	this.dom.gradient.src = this.options.imagePath + "gradient.png";
	if (SZN.Browser.client == "konqueror") {
		this.dom.gradient.style.visibility = "hidden";
	}
	var s = SZN.cEl("img");
	var path = this.options.imagePath + "s.png";
	if (SZN.Browser.client == "ie") {
		s.src = this.options.imagePath + "blank.gif";
		s.width = 20;
		s.height = this.dim;
		s.style.filter =  "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+path+"', sizingMethod='scale')";
	} else {
		s.src = path;
	}
	this.dom.s.appendChild(s);
	
	this.dom.circle = SZN.cEl("img",false,false,{position:"absolute"});
	this.dom.circle.src = this.options.imagePath+"circle.gif";
	
	this.dom.slider = SZN.cEl("img",false,false,{position:"absolute",left:"-3px",cursor:"n-resize"});
	this.dom.slider.src = this.options.imagePath+"slider.gif"
	
	SZN.Dom.append([this.dom.rainbow,this.dom.hv,this.dom.s],[this.dom.hv,this.dom.gradient,this.dom.circle],[this.dom.s,this.dom.slider]);
	
	this.ec.push(SZN.Events.addListener(this.dom.hv,"mousedown",this,"_downHV",false,true));
	this.ec.push(SZN.Events.addListener(this.dom.s,"mousedown",this,"_downS",false,true));
	this.ec.push(SZN.Events.addListener(document,"mouseup",this,"_up",false,true));
	this.ec.push(SZN.Events.addListener(document,"mousemove",this,"_move",false,true));
}

SZN.ColorPicker.prototype._buildMixer = function() {
	this.dom.mixer = SZN.cEl("div",false,false,{position:"relative"});
	this.dom.selected = SZN.cEl("div",false,false,{height:"50px",border:"1px solid #000"});
	
	var t = SZN.cEl("table",false,false,{width:"100%"});
	var tb = SZN.cEl("tbody");
	t.appendChild(tb);
	this.rows = [];
	for (var i=0;i<3;i++) {
		this.rows[i] = SZN.cEl("tr");
		tb.appendChild(this.rows[i]);
	}
	
	this.dom.inputs = {};
	this.dom.inputs.hex = SZN.cEl("input", false, 'color-picker-hex');
	this.dom.inputs.hex.type = "text";
	this.dom.inputs.hex.size = 6;
	this.dom.inputs.hex.maxLength = 7;
	
	var names = [["r","h"],["g","s"],["b","v"]];
	var suffix = [["","°"],["","%"],["","%"]];
	if (SZN.Browser.client == "opera") { suffix[0][1] = ""; }

	var td = SZN.cEl("td");
	td.rowSpan = 3;
	this.rows[0].appendChild(td);
	SZN.Dom.append([this.dom.mixer, t],[td,this.dom.selected,SZN.cTxt("HEX: "),this.dom.inputs.hex]);
	this.ec.push(SZN.Events.addListener(this.dom.inputs.hex,"keyup",this,"_pressHex",false,true));

	for (var i=0;i<names.length;i++) {
		var tr = this.rows[i];
		var row = names[i];
		for (var j=0;j<row.length;j++) {
			var td = SZN.cEl("td");
			var name = row[j];
			var inp = SZN.cEl("input", false, 'color-picker-input');
			inp.type = "text";
			inp.size = (SZN.Browser.client == "ie" || SZN.Browser.client == "gecko" ? 1 : 3);
			this.dom.inputs[name] = inp;
			SZN.Dom.append([td,SZN.cTxt(name.toUpperCase()+": "),inp,SZN.cTxt(suffix[i][j])],[tr,td]);
			var m = (j ? "_pressHSV" : "_pressRGB");
			this.ec.push(SZN.Events.addListener(inp,"keyup",this,m,false,true));
		}
	}
}

SZN.ColorPicker.prototype._switch = function(oldI, newI) {
	this.mode = newI;
	switch (this.mode) {
		case 0: /* palette */
			for (var p in this.dom.inputs) {
				var inp = this.dom.inputs[p];
				inp.readOnly = true;
			}
		break;
		case 1: /* rainbow */
			for (var p in this.dom.inputs) {
				var inp = this.dom.inputs[p];
				inp.readOnly = false;
			}
		break;
	}
}

SZN.ColorPicker.prototype._show = function() {
	this.window.show();
}

SZN.ColorPicker.prototype._hide = function() {
	this.window.hide();
}

SZN.ColorPicker.prototype._sync = function(ignoreList) {
	var ignore = ignoreList || {};
	
	var x = this.color.x;
	this.dom.selected.style.backgroundColor = x;
	
	if (!("hex" in ignore)) {
		this.dom.inputs.hex.value = x;
	}
	if (!("rgb" in ignore)) {
		this.dom.inputs.r.value = this.color.R;
		this.dom.inputs.g.value = this.color.G;
		this.dom.inputs.b.value = this.color.B;
	}
	
	if (!("hsv" in ignore)) {
		this.dom.inputs.h.value = this.color.H;
		this.dom.inputs.s.value = this.color.S;
		this.dom.inputs.v.value = this.color.V;
	}
	
	var c = new SZN.Color();
	c.setHSV(this.color.h,1,this.color.v);
	this.dom.s.style.backgroundColor = c.x;
	var h = parseInt(this.color.H) / 359 * (this.dim-1);
	var s = this.color.s;
	var opacity = 1-s;
	var s = parseFloat(s) * (this.dim-1);
	var v = this.dim-parseFloat(this.color.v) * (this.dim-1);
	this.dom.circle.style.left = (h - 7) + "px";
	this.dom.circle.style.top = (v - 8) + "px";
	this.dom.slider.style.top = (s - 2) + "px";	
	if (SZN.Browser.client == "ie") {
		var o = Math.round(opacity*100);
		this.dom.gradient.style.filter = "alpha(opacity="+o+")";
	} else {
		this.dom.gradient.style.opacity = opacity;
	}
}

SZN.ColorPicker.prototype._cancel = function() {
	this._hide();
}

SZN.ColorPicker.prototype._ok = function() {
	this._hide();
	if (this.cb) { this.cb(this.color); }
	this.makeEvent("colorselect");
}

SZN.ColorPicker.prototype._clickPalette = function(e, elm) {
	var t = SZN.Events.getTarget(e);
	var index = -1;
	for (var i=0;i<this.cache.length;i++) {
		var item = this.cache[i];
		if (item[0] == t) { index = i; }
	}
	if (index == -1) { return; }
	var col = this.cache[index][1];
	this.color.setHSV(col.h,col.s,col.v);
	this._sync();
}

SZN.ColorPicker.prototype._dblClickPalette = function(e, elm) {
	this._ok();
}

SZN.ColorPicker.prototype._pressHex = function(e, elm) {
	var val = this.dom.inputs.hex.value;
	this.color.setHex(val);
	this._sync({hex:1});
}

SZN.ColorPicker.prototype._pressRGB = function(e, elm) {
	var r = parseInt(this.dom.inputs.r.value,10)/255;
	var g = parseInt(this.dom.inputs.g.value,10)/255;
	var b = parseInt(this.dom.inputs.b.value,10)/255;
	this.color.setRGB(r,g,b);
	this._sync({rgb:1});
}

SZN.ColorPicker.prototype._pressHSV = function(e, elm) {
	var h = parseInt(this.dom.inputs.h.value,10);
	var s = parseInt(this.dom.inputs.s.value,10)/100;
	var v = parseInt(this.dom.inputs.v.value,10)/100;
	this.color.setHSV(h,s,v);
	this._sync({hsv:1});
}

SZN.ColorPicker.prototype._up = function(e, elm) {
	this.moving = 0;
}

SZN.ColorPicker.prototype._move = function(e, elm) {
	if (!this.moving) { return; }
	SZN.Events.cancelDef(e);
	var m = "_update"+this.moving;
	this[m](e);
}

SZN.ColorPicker.prototype._downHV = function(e, elm) {
	SZN.Events.cancelDef(e);
	this.moving = "HV";
	this._updateHV(e);
}

SZN.ColorPicker.prototype._downS = function(e, elm) {
	SZN.Events.cancelDef(e);
	this.moving = "S";
	this._updateS(e);
}

SZN.ColorPicker.prototype._updateHV = function(e) {
	var pos = SZN.Dom.getBoxPosition(this.dom.rainbow);
	var scroll = SZN.Dom.getScrollPos();
	pos.left -= scroll.x;
	pos.top -= scroll.y;
	var x = e.clientX - pos.left;
	var y = e.clientY - pos.top;
	
	if (SZN.Browser.client == "ie") {
		x -= 3;
		y -= 3;
	} else if (SZN.Browser.client == "gecko" || SZN.Browser.client == "safari") {
		x -= 1;
		y -= 1;
	} 
	
	var s = this.color.s;
	if (x < 1) { x = 1; }
	if (x > this.dim) { x = this.dim; }
	if (y < 1) { y = 1; }
	if (y > this.dim) { y = this.dim; }
	
	var h = (x-1) / (this.dim-1) * 359;
	var v = 1 - ((y-1) / (this.dim-1));
	this.color.setHSV(h,s,v);
	this._sync();
}

SZN.ColorPicker.prototype._updateS = function(e) {
	var pos = SZN.Dom.getBoxPosition(this.dom.hv);
	var scroll = SZN.Dom.getScrollPos();
	pos.left -= scroll.x;
	pos.top -= scroll.y;
	var y = e.clientY - pos.top;
	
	if (SZN.Browser.client == "ie") {
		y -= 3;
	} else if (SZN.Browser.client == "gecko" || SZN.Browser.client == "safari") {
		y -= 1;
	} 

	var h = this.color.h;
	var v = this.color.v;
	
	if (y < 1) { y = 1; }
	if (y > this.dim) { y = this.dim; }
	
	var s = (y-1)/(this.dim-1);
	this.color.setHSV(h,s,v);
	this._sync();
}

/* -------------------------------------- */

SZN.Color = SZN.ClassMaker.makeClass({
	NAME:"Color",
	VERSION:"1.0",
	CLASS:"class"
});

SZN.Color.prototype.$constructor = function() {
	this.h = 0;
	this.s = 1;
	this.v = 0;
}

SZN.Color.prototype.$destructor = function() {
	for (var p in this) { this[p] = null; }
}

SZN.Color.prototype._sync = function() {
	var rgb = this._hsv2rgb(this.h,this.s,this.v);
	this.r = rgb[0];
	this.g = rgb[1];
	this.b = rgb[2];
	this.R = this._1toN(this.r);
	this.G = this._1toN(this.g);
	this.B = this._1toN(this.b);
	this.H = Math.round(this.h);
	this.S = this._1toN(this.s,100);
	this.V = this._1toN(this.v,100);
	this.x = "#"+this._lz(this.R.toString(16))+this._lz(this.G.toString(16))+this._lz(this.B.toString(16));
}

SZN.Color.prototype.setRGB = function(r,g,b) {
	if (isNaN(r) || isNaN(g) || isNaN(b)) { return; }
	var h = 0;
	var s = 0;
	var v = 0;

	var min = 0
	var max = 0;

	if (r >= g && r >= b) {
		max = r;
		min = (g > b) ? b : g;
	} else if (g >= b && g >= r) {
		max = g;
		min = (r > b) ? b : r;
	} else {
		max = b;
		min = (g > r) ? r : g;
	}

	v = max;
	s = (max) ? ((max - min) / max) : 0;

	if (!s) {
		h = 0;
	} else {
		delta = max - min;
		if (r == max) {
			h = (g - b) / delta;
		} else if (g == max) {
			h = 2 + (b - r) / delta;
		} else {
			h = 4 + (r - g) / delta;
		}
		h = Math.round(h * 60);
		if (h < 0) { h += 360; }
	}
	this.setHSV(h,s,v);
}

SZN.Color.prototype.setHSV = function(h,s,v) {
	if (isNaN(h) || isNaN(s) || isNaN(v)) { return; }
	this.h = h;
	this.v = v;
	this.s = s;
	this._sync();
}

SZN.Color.prototype.setHex = function(hex) {
	var regs = hex.match(/ *#(.*)/);
	var c = regs[1];
	if (c.length == 3) {
		var r = parseInt(c.charAt(0),16)*17/255;
		var g = parseInt(c.charAt(1),16)*17/255;
		var b = parseInt(c.charAt(2),16)*17/255;
	} else if (c.length == 6) {
		var r = parseInt(c.slice(0,2),16)/255;
		var g = parseInt(c.slice(2,4),16)/255;
		var b = parseInt(c.slice(4,6),16)/255;
	} else { return; }
	this.setRGB(r,g,b);
}

SZN.Color.prototype.parse = function(str) {
	if (str.indexOf("#") != -1) {
		this.setHex(str);
	} else {
		var regs = str.match(/ *\( *([^,]+) *, *([^,]+) *, *([^\)]+)/);
		r = parseInt(regs[1])/255;
		g = parseInt(regs[2])/255;
		b = parseInt(regs[3])/255;
		this.setRGB(r,g,b);
	}
}

SZN.Color.prototype.generatePalette = function(x,y,max) {
	var xx = x/(max-1);
	var yy = y/(max-1);
	
	var h = xx ? (2*(Math.atan(xx/yy) / Math.PI) * 360) : 0;
	if (h > 360) { h = 360; }

	var s = xx+yy;
	if (s > 1) { s = 2-s; }
	
	var v = Math.max(xx,yy);
	
	if (!y) {
		s = 0;
		v = x/(max);
	}
	if (h >= 360) { h = 0; }
	
	this.setHSV(h,s,v);
}

SZN.Color.prototype._hsv2rgb = function(h,s,v) {
	var hi = Math.floor(h/60) % 6;
	var f = h/60 - hi;
	var p = v * (1 - s);
	var q = v * (1 - f*s);
	var t = v * (1 - (1 - f)*s);
	switch (hi) {
		case 0: return [v,t,p]; break;
		case 1: return [q,v,p]; break;
		case 2: return [p,v,t]; break;
		case 3: return [p,q,v]; break;
		case 4: return [t,p,v]; break;
		case 5: return [v,p,q]; break;
	}
}

SZN.Color.prototype._1toN = function(val, n) {
	var max = n || 255;
	return Math.round(val * max);
}

SZN.Color.prototype._lz = function(val) {
	return (val.toString().length > 1 ? val.toString() : "0"+val.toString());
}