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farbwahl.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<style text="text/css">
<!--
#farbwahl
{
position:relative;
width:256px;
height:256px;
padding:0px;
border:1px solid black;
}
#vorschau
{
position:relative;
background-color:#fff;
border:1px solid black;
}
#wahl
{
position:relative;
background-color:#fff;
border:1px solid black;
}
-->
</style>
<script type="text/javascript">
addary = new Array();
addary[0] = new Array(0,1,0); // rot
addary[1] = new Array(-1,0,0); // rot gruen
addary[2] = new Array(0,0,1); // gruen
addary[3] = new Array(0,-1,0); // gruen blau
addary[4] = new Array(1,0,0); // blau
addary[5] = new Array(0,0,-1); // rot blau
addary[6] = new Array(255,1,1); // rot
clrary = new Array(360);
for(i = 0; i < 6; i++)
{
for(j = 0; j < 60; j++)
{
clrary[60 * i + j] = new Array(3);
for(k = 0; k < 3; k++)
{
clrary[60 * i + j][k] = addary[6][k];
addary[6][k] += (addary[i][k] * 4);
}
}
}
function getColor(xk,yk)
{
var x,y, sx, sy, qx, qy, q, quad, xa, ya, d, deg, n;
x = yk * 4;
y = xk * 4;
sx = x - 512;
sy = y - 512;
qx = (sx < 0)?0:1;
qy = (sy < 0)?0:1;
q = 2 * qy + qx;
quad = new Array(-180,360,180,0);
xa = Math.abs(sx);
ya = Math.abs(sy);
d = ya * 45 / xa;
if(ya > xa) d = 90 - (xa * 45 / ya);
deg = Math.floor(Math.abs(quad[q] - d));
n = 0;
sx = Math.abs(x - 512);
sy = Math.abs(y - 512);
r = Math.sqrt((sx * sx) + (sy * sy));
if(x == 512 & y == 512)
{
c = "000000";
}
else
{
for(i = 0; i < 3; i++)
{
r2 = clrary[deg][i] * r / 256;
if(r > 256) r2 += Math.floor(r - 256);
if(r2 > 255) r2 = 255;
n = 256 * n + Math.floor(r2);
}
c = n.toString(16);
while(c.length < 6) c = "0" + c;
}
return c;
}
function getLayerObj(id)
{
var objLayer = null;
if(document.all) objLayer = document.all[id]; // IE 4
else if(document.getElementById) objLayer = document.getElementById(id); // DOM
else if(document.layers) objLayer = document.layers[id];
return objLayer;
}
function getLayerPosition()
{
var obj = getLayerObj('farbwahl');
var pos = {posX:0, posY:0};
if(obj.offsetParent)
{
var o = obj;
while(o.offsetParent)
{
pos.posX += o.offsetLeft;
o = o.offsetParent;
}
}
else if(obj.x)
{
pos.posX += obj.x;
}
else if(document.layers)
{
pos.posX += obj.pageX;
}
if(obj.offsetParent)
{
var o = obj;
while(o.offsetParent)
{
pos.posY += o.offsetTop;
o = o.offsetParent;
}
}
else if(obj.y)
{
pos.posY += obj.y;
}
else if(document.layers)
{
pos.posY += obj.pageY;
}
return pos;
}
function getMousePosition(e)
{
var posX = 0;
var posY = 0;
if(e)
{
posX = e.pageX;
posY = e.pageY;
}
else
{
posX = window.event.x;
posY = window.event.y;
}
return { posX:posX, posY:posY };
}
function getPositionOnImage(e)
{
var m_pos = getMousePosition(e);
var l_pos = getLayerPosition(e);
var posX = m_pos.posX - l_pos.posX;
var posY = m_pos.posY - l_pos.posY;
return { posX:posX, posY:posY };
}
function changeColor(farbe,id)
{
var obj = getLayerObj(id);
if(!obj) return;// alert('Fehler!\n' + id + ' ist kein Objekt.');
if(obj.style)
{
obj.style.backgroundColor = farbe;
}
else
{
obj.bgColor = farbe;
}
}
function preview(e)
{
var posX = getPositionOnImage(e).posX;
var posY = getPositionOnImage(e).posY;
var farbe = getColor(posX,posY);
changeColor("#"+farbe,"vorschau");
document.fw.vorschau_wert.value = farbe;
}
function wahlclick()
{
var farbe = document.fw.vorschau_wert.value;
changeColor("#"+farbe,"wahl");
document.fw.wahl_wert.value = farbe;
}
function init()
{
var farbw;
if(document.all)
{
farbw = document.all["farbwahl"];
farbw.onmousemove = preview;
farbw.onclick = wahlclick;
}
else if(document.getElementById)
{
farbw = document.getElementById("farbwahl");
farbw.addEventListener("mousemove", preview, false);
farbw.addEventListener("click", wahlclick, false);
}
else if(document.layers)
{
farbw = document.layers["farbwahl"].document;
farbw.captureEvents(Event.MOUSEMOVE);
farbw.onmousemove = preview;
farbw.captureEvents(Event.MOUSEUP);
farbw.onmouseup = wahlclick;
}
}
function setColor() {
strGET=document.location.search.substr(1,document.location.search.length);
if(strGET!='') {
gArr=strGET.split('&');
for(i=0;i<gArr.length;++i) {
v=''; vArr=gArr[i].split('=');
if(vArr.length>1){
if (vArr[0]=="idx") idx = vArr[1];
}
}
} else {
idx = 0;
}
opener.setColor(document.fw.wahl_wert.value,idx);
self.close();
}
// -->
</script>
</head>
<body onLoad="init();">
<table border="1" cellspacing="0" cellpadding="2">
<tr>
<td><b>Farbe wählen...</b></td>
</tr>
<tr>
<td>
<table border="0" cellspacing="10" cellpadding="0">
<tr>
<td>
<div id="farbwahl"><a href="#"><img src="image/farbwahl.jpg" border="0"></A></div>
</td>
<td valign="bottom">
<table border="0" cellspacing="5" cellpadding="0">
<tr>
<form name="fw">
<td>Vorschau:</td>
</tr>
<tr>
<td>
<div id="vorschau"> <img src="#" width="100" height="1"></div>
</td>
</tr>
<tr>
<td>
<input type="text" value="#ffffff" name="vorschau_wert">
</td>
</tr>
<tr>
<td>
Ausgewählt:
</td>
</tr>
<tr>
<td>
<div id="wahl">
<img src="#" width="100" height="1"></div>
</td>
</tr>
<tr>
<td>
<input type="text" value="#ffffff" name="wahl_wert">
</td>
</tr>
<tr>
<td align="right">
<input type="button" value="Übernehmen" onClick="setColor();">
</td>
</form>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>