ColorPalette.js

/**
 * @class Ext.ColorPalette
 * @extends Ext.Component
 * Simple color palette class for choosing colors.  The palette can be rendered to any container.<br />
 * Here's an example of typical usage:
 * <pre><code>
var cp = new Ext.ColorPalette({value:'993300'});  // initial selected color
cp.render('my-div');

cp.on('select', function(palette, selColor){
    // do something with selColor
});
</code></pre>
 * @constructor
 * Create a new ColorPalette
 * @param {Object} config The config object
 */
Ext.ColorPalette = function(config){
    Ext.ColorPalette.superclass.constructor.call(this, config);
    this.addEvents({
        /**
	     * @event select
	     * Fires when a color is selected
	     * @param {ColorPalette} this
	     * @param {String} color The 6-digit color hex code (without the # symbol)
	     */
        select: true
    });

    if(this.handler){
        this.on("select", this.handler, this.scope, true);
    }
};
Ext.extend(Ext.ColorPalette, Ext.Component, {
    /**
     * @cfg {String} itemCls
     * The CSS class to apply to the containing element (defaults to "x-color-palette")
     */
    itemCls : "x-color-palette",
    /**
     * @cfg {String} value
     * The initial color to highlight (should be a valid 6-digit color hex code without the # symbol).  Note that
     * the hex codes are case-sensitive.
     */
    value : null,

    // private
    ctype: "Ext.ColorPalette",

    /**
     * <p>An array of 6-digit color hex code strings (without the # symbol).  This array can contain any number
     * of colors, and each hex code should be unique.  The width of the palette is controlled via CSS by adjusting
     * the width property of the 'x-color-palette' class (or assigning a custom class), so you can balance the number
     * of colors with the width setting until the box is symmetrical.</p>
     * <p>You can override individual colors if needed:</p>
     * <pre><code>
var cp = new Ext.ColorPalette();
cp.colors[0] = "FF0000";  // change the first box to red
</code></pre>

Or you can provide a custom array of your own for complete control:
<pre><code>
var cp = new Ext.ColorPalette();
cp.colors = ["000000", "993300", "333300"];
</code></pre>
     * @type Array
     */
    colors : [
        "000000", "993300", "333300", "003300", "003366", "000080", "333399", "333333",
        "800000", "FF6600", "808000", "008000", "008080", "0000FF", "666699", "808080",
        "FF0000", "FF9900", "99CC00", "339966", "33CCCC", "3366FF", "800080", "969696",
        "FF00FF", "FFCC00", "FFFF00", "00FF00", "00FFFF", "00CCFF", "993366", "C0C0C0",
        "FF99CC", "FFCC99", "FFFF99", "CCFFCC", "CCFFFF", "99CCFF", "CC99FF", "FFFFFF"
    ],

    // private
    onRender : function(container, position){
        var t = new Ext.MasterTemplate(
            '<tpl><a href="#" class="color-{0}" hidefocus="on"><em><span style="background:#{0}">&#160;</span></em></a></tpl>'
        );
        var c = this.colors;
        for(var i = 0, len = c.length; i < len; i++){
            t.add([c[i]]);
        }
        var el = document.createElement("div");
        el.className = this.itemCls;
        t.overwrite(el);
        container.dom.insertBefore(el, position);
        this.el = Ext.get(el);
        this.el.on("click", this.handleClick,  this, {delegate: "a"});
    },

    // private
    afterRender : function(){
        Ext.ColorPalette.superclass.afterRender.call(this);
        if(this.value){
            var s = this.value;
            this.value = null;
            this.select(s);
        }
    },

    // private
    handleClick : function(e, t){
        e.preventDefault();
        if(!this.disabled){
            var c = t.className.match(/(?:^|\s)color-(.{6})(?:\s|$)/)[1];
            this.select(c.toUpperCase());
        }
    },

    /**
     * Selects the specified color in the palette (fires the select event)
     * @param {String} color A valid 6-digit color hex code (# will be stripped if included)
     */
    select : function(color){
        color = color.replace("#", "");
        if(color != this.value){
            var el = this.el;
            if(this.value){
                el.child("a.color-"+this.value).removeClass("x-color-palette-sel");
            }
            el.child("a.color-"+color).addClass("x-color-palette-sel");
            this.value = color;
            this.fireEvent("select", this, color);
        }
    }
});