/* DHTML Color Picker v1.0.3, Programming by Ulyses, ColorJack.com */
/* Updated August 24th, 2007 */

function $(v) { return(document.getElementById(v)); }
function $S(v) { return(document.getElementById(v).style); }
function absPos(o) { var r={x:o.offsetLeft,y:o.offsetTop}; if(o.offsetParent) { var v=absPos(o.offsetParent); r.x+=v.x; r.y+=v.y; } return(r); }  
function agent(v) { return(Math.max(navigator.userAgent.toLowerCase().indexOf(v),0)); }
function toggle(v) { $S(v).display=($S(v).display=='none'?'block':'none'); }
function within(v,a,z) { return((v>=a && v<=z)?true:false); }
function XY(e,v) { var z=agent('msie')?[event.clientX+document.body.scrollLeft,event.clientY+document.body.scrollTop]:[e.pageX,e.pageY]; return(z[zero(v)]); }
function XYwin(v) { var z=agent('msie')?[document.body.clientHeight,document.body.clientWidth]:[window.innerHeight,window.innerWidth]; return(!isNaN(v)?z[v]:z); }
function zero(v) { v=parseInt(v); return(!isNaN(v)?v:0); }

/* PLUGIN */

var maxValue={'h':360,'s':100,'v':100}, HSV={0:360,1:100,2:100};
var hSV=165, wSV=162, hH=163, slideHSV={0:360,1:100,2:100}, zINDEX=15, stop=1;
var currentHex = "";

function HSVslide(d,o,e) {

	function tXY(e) { tY=XY(e,1)-ab.y; tX=XY(e)-ab.x; }
	function mkHSV(a,b,c) { return(Math.min(a,Math.max(0,Math.ceil((parseInt(c)/b)*a)))); }
	function ckHSV(a,b) { if(within(a,0,b)) return(a); else if(a>b) return(b); else if(a<0) return('-'+oo); }
	function drag(e) { if(!stop) { if(d!='drag') tXY(e);
	
		if(d=='SVslide') { ds.left=ckHSV(tX-oo,wSV)+'px'; ds.top=ckHSV(tY-oo,wSV)+'px';
		
			slideHSV[1]=mkHSV(100,wSV,ds.left); slideHSV[2]=100-mkHSV(100,wSV,ds.top); HSVupdate();

		}
		else if(d=='Hslide') { var ck=ckHSV(tY-oo,hH), j, r='hsv', z={};
		
			ds.top=(ck-5)+'px'; slideHSV[0]=mkHSV(360,hH,ck);
 
			for(var i=0; i<=r.length-1; i++) { j=r.substr(i,1); z[i]=(j=='h')?maxValue[j]-mkHSV(maxValue[j],hH,ck):HSV[i]; }

			HSVupdate(z); $S('SV').backgroundColor='#'+hsv2hex([HSV[0],100,100]);

		}
		else if(d=='drag') { ds.left=XY(e)+oX-eX+'px'; ds.top=XY(e,1)+oY-eY+'px'; }

	}}

	if(stop) { stop=''; var ds=$S(d!='drag'?d:o);

		if(d=='drag') { var oX=parseInt(ds.left), oY=parseInt(ds.top), eX=XY(e), eY=XY(e,1); $S(o).zIndex=zINDEX++; }
		else { var ab=absPos($(o)), tX, tY, oo=(d=='Hslide')?2:4; ab.x+=10; ab.y+=22; if(d=='SVslide') slideHSV[0]=HSV[0]; }

		document.onmousemove=drag; document.onmouseup=function(){ stop=1; document.onmousemove=''; document.onmouseup=''; }; drag(e);

	}
}

function HSVupdate(v) { 
	v = hsv2hex(HSV = v ? v : slideHSV);

	$('plugHEX').innerHTML = '#' + v;
	$S('plugCUR').background = '#' + v;
	currentHex = v;
	ColorPickerFormField.value = currentHex;
	document.getElementById("spnColorSample").style.backgroundColor = "#" + currentHex;
	return(v);

}

function GetColor()
{
	return currentHex;
}

function GetPicker(){
	var pickerHTML = "<div id=\"divColorPickerContainer\" style=\"position:absolute;display:none;\">"
		+ "<div id=\"plugin\" style=\"Z-INDEX: 20;\">"
		+ "<div style=\"float:left;margin-right:5px;\">Color: </div>"
		+ "<div id=\"plugCUR\" style=\"width:125px;border:1px solid silver;\"></div>"
		+ "<div id=\"plugCLOSE\" style=\"display:;\" onmousedown=\"ShowPicker(false);//toggle('plugin')\">close</div>"
		+ "<br>"
		+ "<div id=\"SV\" onmousedown=\"HSVslide('SVslide','plugin',event)\" title=\"Saturation + Value\">"
		+ "<div id=\"SVslide\" style=\"TOP: -4px; LEFT: -4px;\"><br /></div>"
		+ "</div>"
		+ "<div id=\"H\" onmousedown=\"HSVslide('Hslide','plugin',event)\" title=\"Hue\">"
		+ "<div id=\"Hslide\" style=\"TOP: -7px; LEFT: -8px;\"><br /></div>"
		+ "<div id=\"Hmodel\"></div>"
		+ "</div>"
		+ "<div id=\"plugHEX\"></div>"
		+ "</div></div>";
	return pickerHTML;
}
//function GetPicker(){
//	var pickerHTML = "<div id=\"divColorPickerContainer\" style=\"position:absolute;display:none;\">"
//		+ "<div id=\"plugin\" style=\"Z-INDEX: 20;\">"
//		+ "<div style=\"float:left;margin-right:5px;\">Color: </div>"
//		+ "<div id=\"plugCUR\" style=\"width:125px;border:1px solid silver;\"></div>"
//		+ "<div id=\"plugCLOSE\" style=\"display:;\" onmousedown=\"ShowPicker(false);//toggle('plugin')\">close</div>"
//		+ "<br>"
//		+ "<div id=\"SV\" onmousedown=\"HSVslide('SVslide','plugin',event)\" title=\"Saturation + Value\">"
//		+ "<div id=\"SVslide\" style=\"TOP: -4px; LEFT: -4px;\"><br /></div>"
//		+ "</div>"
//		+ "<div id=\"Hslide\" style=\"TOP: -7px; LEFT: -8px;\"><br /></div>"
//		+ "<div id=\"Hmodel\"></div>"
//		+ "<div id=\"plugHEX\"></div>"
//		+ "</div></div>";
//	return pickerHTML;
//}
var ColorPickerFormField;
function InitializePicker(fld){
	/* LOAD */

	loadSV();
	ColorPickerFormField = document.getElementById(fld);
	$S('plugin').display='block';
	$S('SVslide').top='-4px';
	$S('SVslide').left='-4px';
	//HSVupdate([0,100,100]);
	document.getElementById("spnColorSample").style.backgroundColor = "#" + ColorPickerFormField.value;
}

function loadSV() { var z='';

	for(var i=hSV; i>=0; i--) z+="<div style=\"BACKGROUND: #"+hsv2hex([Math.round((360/hSV)*i),100,100])+";\"><br /><\/div>";
	
	$('Hmodel').innerHTML=z;
	
}

/* CONVERSIONS */

function toHex(v) { v=Math.round(Math.min(Math.max(0,v),255)); return("0123456789ABCDEF".charAt((v-v%16)/16)+"0123456789ABCDEF".charAt(v%16)); }
function rgb2hex(r) { return(toHex(r[0])+toHex(r[1])+toHex(r[2])); }
function hsv2hex(h) { return(rgb2hex(hsv2rgb(h))); }	

function hsv2rgb(r) { // easyrgb.com/math.php?MATH=M21#text21

    var R,B,G,S=r[1]/100,V=r[2]/100,H=r[0]/360;

    if(S>0) { if(H>=1) H=0;

        H=6*H; F=H-Math.floor(H);
        A=Math.round(255*V*(1.0-S));
        B=Math.round(255*V*(1.0-(S*F)));
        C=Math.round(255*V*(1.0-(S*(1.0-F))));
        V=Math.round(255*V); 

        switch(Math.floor(H)) {

            case 0: R=V; G=C; B=A; break;
            case 1: R=B; G=V; B=A; break;
            case 2: R=A; G=V; B=C; break;
            case 3: R=A; G=B; B=V; break;
            case 4: R=C; G=A; B=V; break;
            case 5: R=V; G=A; B=B; break;

        }

        return([R?R:0,G?G:0,B?B:0]);

    }
    else return([(V=Math.round(V*255)),V,V]);

}


function ShowPicker(b){
	if(b){
		document.getElementById("divColorPickerContainer").style.display = "";
	}
	else{
		document.getElementById("divColorPickerContainer").style.display = "none";
	}
}