Color Picker - ColorPicker2.js

//The following files are also required and must be included in your HTML page:   AnchorPosition.js   PopupWindow.js

// ===================================================================
// Author: Matt Kruse <[email protected]>
// 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;
}

// 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;
}