// ===================================================================
// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
//
// NOTICE: You may use this code for any purpose, commercial or
// private, without any further permission from the author. You may
// remove this notice from your final code if you wish, however it is
// appreciated by the author if at least my web site address is kept.
//
// You may *NOT* re-distribute this code in any way except through its
// use. That means, you can include it in your product, or your web
// site, or any other form where the code is actually being used. You
// may not put the plain javascript up on your site for download or
// include it in your javascript libraries for download. 
// If you wish to share this code with others, please just point them
// to the URL instead.
// Please DO NOT link directly to my .js files from your site. Copy
// the files to your server and use them there. Thank you.
// ===================================================================

/* 
Last modified: 02/24/2003

DESCRIPTION: This widget is used to select a color, in hexadecimal #RRGGBB 
form. It uses a color "swatch" to display the standard 216-color web-safe 
palette. The user can then click on a color to select it.

COMPATABILITY: See notes in AnchorPosition.js and PopupWindow.js.
Only the latest DHTML-capable browsers will show the color and hex values
at the bottom as your mouse goes over them.

USAGE:
// Create a new ColorPicker object using DHTML popup
var cp = new ColorPicker();

// Create a new ColorPicker object using Window Popup
var cp = new ColorPicker('window');

// Add a link in your page to trigger the popup. For example:
<A HREF="#" onClick="cp.show('pick');return false;" NAME="pick" ID="pick">Pick</A>

// Or use the built-in "select" function to do the dirty work for you:
<A HREF="#" onClick="cp.select(document.forms[0].color,'pick');return false;" NAME="pick" ID="pick">Pick</A>

// If using DHTML popup, write out the required DIV tag near the bottom
// of your page.
<SCRIPT LANGUAGE="JavaScript">cp.writeDiv()</SCRIPT>

// Write the 'pickColor' function that will be called when the user clicks
// a color and do something with the value. This is only required if you
// want to do something other than simply populate a form field, which is 
// what the 'select' function will give you.
function pickColor(color) {
	field.value = color;
	}

NOTES:
1) Requires the functions in AnchorPosition.js and PopupWindow.js

2) Your anchor tag MUST contain both NAME and ID attributes which are the 
   same. For example:
   <A NAME="test" ID="test"> </A>

3) There must be at least a space between <A> </A> for IE5.5 to see the 
   anchor tag correctly. Do not do <A></A> with no space.

4) When a ColorPicker object is created, a handler for 'onmouseup' is
   attached to any event handler you may have already defined. Do NOT define
   an event handler for 'onmouseup' after you define a ColorPicker object or
   the color picker will not hide itself correctly.
*/ 
ColorPicker_targetInput = null;
function ColorPicker_writeDiv() {
	document.writeln("<DIV ID=\"colorPickerDiv\" STYLE=\"position:absolute;visibility:hidden;\"> </DIV>");
	}

function ColorPicker_show(anchorname) {
	this.showPopup(anchorname);
	}

function ColorPicker_pickColor(color,obj) {
	obj.hidePopup();
	pickColor("#"+color);
	}

// A Default "pickColor" function to accept the color passed back from popup.
// User can over-ride this with their own function.
function pickColor(color) {
	if (ColorPicker_targetInput==null) {
		alert("Target Input is null, which means you either didn't use the 'select' function or you have no defined your own 'pickColor' function to handle the picked color!");
		return;
		}
	ColorPicker_targetInput.value = color;
	ColorPicker_targetInput.focus();
	}

// This function is the easiest way to popup the window, select a color, and
// have the value populate a form field, which is what most people want to do.
function ColorPicker_select(inputobj,linkname) {
	if (inputobj.type!="text" && inputobj.type!="hidden" && inputobj.type!="textarea") { 
		alert("colorpicker.select: Input object passed is not a valid form input object"); 
		window.ColorPicker_targetInput=null;
		return;
		}
	window.ColorPicker_targetInput = inputobj;
	this.show(linkname);
	}
	
// This function runs when you move your mouse over a color block, if you have a newer browser
function ColorPicker_highlightColor(c) {
	var thedoc = (arguments.length>1)?arguments[1]:window.document;
	var d = thedoc.getElementById("colorPickerSelectedColor");
	d.style.backgroundColor = "#"+c;
	d = thedoc.getElementById("colorPickerSelectedColorValue");
	d.innerHTML = "#"+c;
	}

function ColorPicker() {
	var windowMode = false;
	// Create a new PopupWindow object
	if (arguments.length==0) {
		var divname = "colorPickerDiv";
		}
	else if (arguments[0] == "window") {
		var divname = '';
		windowMode = true;
		}
	else {
		var divname = arguments[0];
		}
	
	if (divname != "") {
		var cp = new PopupWindow(divname);
		}
	else {
		var cp = new PopupWindow();
		cp.setSize(225,250);
		}

	// Object variables
	cp.currentValue = "FFFFFF";
	
	// Method Mappings
	cp.writeDiv = ColorPicker_writeDiv;
	cp.highlightColor = ColorPicker_highlightColor;
	cp.show = ColorPicker_show;
	cp.select = ColorPicker_select;

	// Code to populate color picker window
	var colors = new Array("000000","000033","000066","000099","0000CC","0000FF","330000","330033","330066","330099","3300CC",
							"3300FF","660000","660033","660066","660099","6600CC","6600FF","990000","990033","990066","990099",
							"9900CC","9900FF","CC0000","CC0033","CC0066","CC0099","CC00CC","CC00FF","FF0000","FF0033","FF0066",
							"FF0099","FF00CC","FF00FF","003300","003333","003366","003399","0033CC","0033FF","333300","333333",
							"333366","333399","3333CC","3333FF","663300","663333","663366","663399","6633CC","6633FF","993300",
							"993333","993366","993399","9933CC","9933FF","CC3300","CC3333","CC3366","CC3399","CC33CC","CC33FF",
							"FF3300","FF3333","FF3366","FF3399","FF33CC","FF33FF","006600","006633","006666","006699","0066CC",
							"0066FF","336600","336633","336666","336699","3366CC","3366FF","666600","666633","666666","666699",
							"6666CC","6666FF","996600","996633","996666","996699","9966CC","9966FF","CC6600","CC6633","CC6666",
							"CC6699","CC66CC","CC66FF","FF6600","FF6633","FF6666","FF6699","FF66CC","FF66FF","009900","009933",
							"009966","009999","0099CC","0099FF","339900","339933","339966","339999","3399CC","3399FF","669900",
							"669933","669966","669999","6699CC","6699FF","999900","999933","999966","999999","9999CC","9999FF",
							"CC9900","CC9933","CC9966","CC9999","CC99CC","CC99FF","FF9900","FF9933","FF9966","FF9999","FF99CC",
							"FF99FF","00CC00","00CC33","00CC66","00CC99","00CCCC","00CCFF","33CC00","33CC33","33CC66","33CC99",
							"33CCCC","33CCFF","66CC00","66CC33","66CC66","66CC99","66CCCC","66CCFF","99CC00","99CC33","99CC66",
							"99CC99","99CCCC","99CCFF","CCCC00","CCCC33","CCCC66","CCCC99","CCCCCC","CCCCFF","FFCC00","FFCC33",
							"FFCC66","FFCC99","FFCCCC","FFCCFF","00FF00","00FF33","00FF66","00FF99","00FFCC","00FFFF","33FF00",
							"33FF33","33FF66","33FF99","33FFCC","33FFFF","66FF00","66FF33","66FF66","66FF99","66FFCC","66FFFF",
							"99FF00","99FF33","99FF66","99FF99","99FFCC","99FFFF","CCFF00","CCFF33","CCFF66","CCFF99","CCFFCC",
							"CCFFFF","FFFF00","FFFF33","FFFF66","FFFF99","FFFFCC","FFFFFF");
	var total = colors.length;
	var width = 18;
	var cp_contents = "";
	var windowRef = (windowMode)?"window.opener.":"";
	if (windowMode) {
		cp_contents += "<HTML><HEAD><TITLE>Select Color</TITLE></HEAD>";
		cp_contents += "<BODY MARGINWIDTH=0 MARGINHEIGHT=0 LEFTMARGIN=0 TOPMARGIN=0><CENTER>";
		}
	cp_contents += "<TABLE BORDER=1 CELLSPACING=1 CELLPADDING=0>";
	var use_highlight = (document.getElementById || document.all)?true:false;
	for (var i=0; i<total; i++) {
		if ((i % width) == 0) { cp_contents += "<TR>"; }
		if (use_highlight) { var mo = 'onMouseOver="'+windowRef+'ColorPicker_highlightColor(\''+colors[i]+'\',window.document)"'; }
		else { mo = ""; }
		cp_contents += '<TD BGCOLOR="'+colors[i]+'"><FONT SIZE="-3"><A HREF="#" onClick="'+windowRef+'ColorPicker_pickColor(\''+colors[i]+'\','+windowRef+'window.popupWindowObjects['+cp.index+']);return false;" '+mo+' STYLE="text-decoration:none;">&nbsp;&nbsp;&nbsp;</A></FONT></TD>';
		if ( ((i+1)>=total) || (((i+1) % width) == 0)) { 
			cp_contents += "</TR>";
			}
		}
	// If the browser supports dynamically changing TD cells, add the fancy stuff
	if (document.getElementById) {
		var width1 = Math.floor(width/2);
		var width2 = width = width1;
		cp_contents += "<TR><TD COLSPAN='"+width1+"' BGCOLOR='#ffffff' ID='colorPickerSelectedColor'>&nbsp;</TD><TD COLSPAN='"+width2+"' ALIGN='CENTER' ID='colorPickerSelectedColorValue'>#FFFFFF</TD></TR>";
		}
	cp_contents += "</TABLE>";
	if (windowMode) {
		cp_contents += "</CENTER></BODY></HTML>";
		}
	// end populate code

	// Write the contents to the popup object
	cp.populate(cp_contents+"\n");
	// Move the table down a bit so you can see it
	cp.offsetY = 25;
	cp.autoHide();
	return cp;
	}