/**
 * @class Ext.picker.Color
 * @extends Ext.Component
 * 
ColorPicker provides a simple color palette for choosing colors. The picker can be rendered to any container.
 * The available default to a standard 40-color palette; this can be customized with the {@link #colors} config.
 * 
Typically you will need to implement a handler function to be notified when the user chooses a color from the
 * picker; you can register the handler using the {@link #select} event, or by implementing the {@link #handler}
 * method.
 * 
Here's an example of typical usage:
 * 
var cp = new Ext.picker.Color({
    value: '993300',  // initial selected color
    renderTo: 'my-div'
});

cp.on('select', function(picker, selColor){
    // do something with selColor
});

 *
 * @constructor
 * Create a new ColorPicker
 * @param {Object} config The config object
 * 
 * @xtype colorpicker
 */
Ext.define('Ext.picker.Color', {
    extend: 'Ext.Component',
    requires: 'Ext.XTemplate',
    alias: 'widget.colorpicker',
    alternateClassName: 'Ext.ColorPalette',
    
    
/**
     * @cfg {String} componentCls
     * The CSS class to apply to the containing element (defaults to 'x-color-picker')
     */
    componentCls : Ext.baseCSSPrefix + 'color-picker',
    
    
/**
     * @cfg {String} selectedCls
     * The CSS class to apply to the selected element
     */
    selectedCls: Ext.baseCSSPrefix + 'color-picker-selected',
    
    
/**
     * @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,
    
    
/**
     * @cfg {String} clickEvent
     * The DOM event that will cause a color to be selected. This can be any valid event name (dblclick, contextmenu).
     * Defaults to 'click'.
     */
    clickEvent :'click',

    
/**
     * @cfg {Boolean} allowReselect If set to true then reselecting a color that is already selected fires the {@link #select} event
     */
    allowReselect : false,

    
/**
     * 
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 picker is controlled via CSS by adjusting
     * the width property of the 'x-color-picker' class (or assigning a custom class), so you can balance the number
     * of colors with the width setting until the box is symmetrical.
     * 
You can override individual colors if needed:
     * 

var cp = new Ext.picker.Color();
cp.colors[0] = 'FF0000';  // change the first box to red


Or you can provide a custom array of your own for complete control:

var cp = new Ext.picker.Color();
cp.colors = ['000000', '993300', '333300'];

     * @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'
    ],

    
/**
     * @cfg {Function} handler
     * Optional. A function that will handle the select event of this picker.
     * The handler is passed the following parameters:

     * 
picker : ColorPicker
The {@link #picker Ext.picker.Color}.
     * 
color : String
The 6-digit color hex code (without the # symbol).
     * 
     */
    
/**
     * @cfg {Object} scope
     * The scope (this reference) in which the {@link #handler}
     * function will be called.  Defaults to this ColorPicker instance.
     */
    
    colorRe: /(?:^|\s)color-(.{6})(?:\s|$)/,
    
    constructor: function() {
        this.renderTpl = new Ext.XTemplate(' ');
        Ext.picker.Color.superclass.constructor.apply(this, arguments);
    },
    
    // private
    initComponent : function(){
        var me = this;
        
        Ext.picker.Color.superclass.initComponent.call(me);
        me.addEvents(
            
/**
             * @event select
             * Fires when a color is selected
             * @param {Ext.picker.Color} this
             * @param {String} color The 6-digit color hex code (without the # symbol)
             */
            'select'
        );

        if (me.handler) {
            me.on('select', me.handler, me.scope, true);
        }
    },


    // private
    onRender : function(container, position){
        var me = this,
            clickEvent = me.clickEvent;
            
        Ext.apply(me.renderData, {
            itemCls: me.itemCls,
            colors: me.colors    
        });
        Ext.picker.Color.superclass.onRender.call(me, container, position);

        me.mon(me.el, clickEvent, me.handleClick, me, {delegate: 'a'});
        // always stop following the anchors
        if(clickEvent != 'click'){
            me.mon(me.el, 'click', Ext.emptyFn, me, {delegate: 'a', stopEvent: true});
        }
    },

    // private
    afterRender : function(){
        var me = this,
            value;
            
        Ext.picker.Color.superclass.afterRender.call(me);
        if (me.value) {
            value = me.value;
            me.value = null;
            me.select(value, true);
        }
    },

    // private
    handleClick : function(event, target){
        var me = this,
            color;
            
        event.stopEvent();
        if (!me.disabled) {
            color = target.className.match(me.colorRe)[1];
            me.select(color.toUpperCase());
        }
    },

    
/**
     * Selects the specified color in the picker (fires the {@link #select} event)
     * @param {String} color A valid 6-digit color hex code (# will be stripped if included)
     * @param {Boolean} suppressEvent (optional) True to stop the select event from firing. Defaults to false.
     */
    select : function(color, suppressEvent){
        
        var me = this,
            selectedCls = me.selectedCls,
            value = me.value,
            el;
            
        color = color.replace('#', '');
        if (!me.rendered) {
            me.value = color;
            return;
        }
        
        
        if (color != value || me.allowReselect) {
            el = me.el;

            if (me.value) {
                el.down('a.color-' + value).removeCls(selectedCls);
            }
            el.down('a.color-' + color).addCls(selectedCls);
            me.value = color;
            if (suppressEvent !== true) {
                me.fireEvent('select', me, color);
            }
        }
    },
    
    
/**
     * Get the currently selected color value.
     * @return {String} value The selected value. Null if nothing is selected.
     */
    getValue: function(){
        return this.value || null;
    }
});