    /**
     * @class Ext.panel.Tool
     * @extends Ext.Component

    This class is used to display small visual icons in the header of a panel. There are a set of
    25 icons that can be specified by using the {@link #type} config. The {@link #handler} config
    can be used to provide a function that will respond to any click events. In general, this class
    will not be instantiated directly, rather it will be created by specifying the {@link Ext.panel.Panel#tools}
    configuration on the Panel itself.

    __Example Usage__

        Ext.create('Ext.panel.Panel', {
           width: 200,
           height: 200,
           renderTo: document.body,
           title: 'A Panel',
           tools: [{
               type: 'help',
               handler: function(){
                   // show help here
               }
           }, {
               itemId: 'refresh',
               type: 'refresh',
               hidden: true,
               handler: function(){
                   // do refresh
               }
           }, {
               type: 'search',
               handler: function(event, target, owner, tool){
                   // do search
                   owner.child('#refresh').show();
               }
           }]
        });

     * @markdown
     * @xtype tool
     */
    Ext.define('Ext.panel.Tool', {
        extend: 'Ext.Component',
        requires: ['Ext.tip.QuickTipManager'],
        alias: 'widget.tool',

        baseCls: Ext.baseCSSPrefix + 'tool',
        disabledCls: Ext.baseCSSPrefix + 'tool-disabled',
        toolPressedCls: Ext.baseCSSPrefix + 'tool-pressed',
        toolOverCls: Ext.baseCSSPrefix + 'tool-over',
        ariaRole: 'button',
        renderTpl: ['<img src="{blank}" class="{baseCls}-{type}" role="presentation"/>'],

        /**
         * @cfg {Function} handler
         * A function to execute when the tool is clicked.
         * Arguments passed are:
         * <ul>
         * <li><b>event</b> : Ext.EventObject<div class="sub-desc">The click event.</div></li>
         * <li><b>toolEl</b> : Ext.core.Element<div class="sub-desc">The tool Element.</div></li>
         * <li><b>panel</b> : Ext.panel.Panel<div class="sub-desc">The host Panel</div></li>
         * <li><b>tool</b> : Ext.panel.Tool<div class="sub-desc">The tool object</div></li>
         * </ul>
         */

        /**
         * @cfg {Object} scope
         * The scope to execute the {@link #handler} function. Defaults to the tool.
         */

        /**
         * @cfg {String} type
         * The type of tool to render. The following types are available:
         * <ul>
         * <li>close</li>
         * <li>collapse</li>
         * <li>down</li>
         * <li>expand</li>
         * <li>gear</li>
         * <li>help</li>
         * <li>left</li>
         * <li>maximize</li>
         * <li>minimize</li>
         * <li>minus</li>
         * <li>move</li>
         * <li>next</li>
         * <li>pin</li>
         * <li>plus</li>
         * <li>prev</li>
         * <li>print</li>
         * <li>refresh</li>
         * <li>resize</li>
         * <li>restore</li>
         * <li>right</li>
         * <li>save</li>
         * <li>search</li>
         * <li>toggle</li>
         * <li>unpin</li>
         * <li>up</li>
         * </ul>
         */

        /**
         * @cfg {String/Object} tooltip
         * The tooltip for the tool - can be a string to be used as innerHTML (html tags are accepted) or QuickTips config object
         */

        /**
         * @cfg {Boolean} stopEvent
         * Defaults to true. Specify as false to allow click event to propagate.
         */
        stopEvent: true,

        initComponent: function() {
            var me = this;
            me.addEvents(
                /**
                 * @event click
                 * Fires when the tool is clicked
                 * @param {Ext.panel.Tool} this
                 * @param {Ext.EventObject} e The event object
                 */
                'click'
            );

            //<debug>
            var types = [
                'close',
                'collapse',
                'down',
                'expand',
                'gear',
                'help',
                'left',
                'maximize',
                'minimize',
                'minus',
                'move',
                'next',
                'pin',
                'plus',
                'prev',
                'print',
                'refresh',
                'resize',
                'restore',
                'right',
                'save',
                'search',
                'toggle',
                'unpin',
                'up'
            ];

            if (me.id && Ext.Array.indexOf(types, me.id) > -1) {
                Ext.global.console.warn('When specifying a tool you should use the type option, the id can conflict now that tool is a Component');
            }
            //</debug>

            me.type = me.type || me.id;

            Ext.applyIf(me.renderData, {
                baseCls: me.baseCls,
                blank: Ext.BLANK_IMAGE_URL,
                type: me.type
            });
            me.renderSelectors.toolEl = '.' + me.baseCls + '-' + me.type;
            me.callParent();
        },

        // inherit docs
        afterRender: function() {
            var me = this;
            me.callParent(arguments);
            if (me.qtip) {
                if (Ext.isObject(me.qtip)) {
                    Ext.tip.QuickTipManager.register(Ext.apply({
                        target: me.id
                    }, me.qtip));
                }
                else {
                    me.toolEl.dom.qtip = me.qtip;
                }
            }

            me.mon(me.toolEl, {
                click: me.onClick,
                mousedown: me.onMouseDown,
                mouseover: me.onMouseOver,
                mouseout: me.onMouseOut,
                scope: me
            });
        },

        /**
         * Set the type of the tool. Allows the icon to be changed.
         * @param {String} type The new type. See the {@link #type} config.
         * @return {Ext.panel.Tool} this
         */
        setType: function(type) {
            var me = this;

            me.type = type;
            if (me.rendered) {
                me.toolEl.dom.className = me.baseCls + '-' + type;
            }
            return me;
        },

        /**
         * Binds this tool to a component.
         * @private
         * @param {Ext.Component} component The component
         */
        bindTo: function(component) {
            this.owner = component;
        },

        /**
         * Fired when the tool element is clicked
         * @private
         * @param {Ext.EventObject} e
         * @param {HTMLElement} target The target element
         */
        onClick: function(e, target) {
            var me = this,
                owner;

            if (me.disabled) {
                return false;
            }
            owner = me.owner || me.ownerCt;

            //remove the pressed + over class
            me.el.removeCls(me.toolPressedCls);
            me.el.removeCls(me.toolOverCls);

            if (me.stopEvent !== false) {
                e.stopEvent();
            }

            Ext.callback(me.handler, me.scope || me, [e, target, owner, me]);
            me.fireEvent('click', me, e);
            return true;
        },

        // inherit docs
        onDestroy: function(){
            if (Ext.isObject(this.tooltip)) {
                Ext.tip.QuickTipManager.unregister(this.id);
            }
            this.callParent();
        },

        /**
         * Called then the user pressing their mouse button down on a tool
         * Adds the press class ({@link #toolPressedCls})
         * @private
         */
        onMouseDown: function() {
            if (this.disabled) {
                return false;
            }

            this.el.addCls(this.toolPressedCls);
        },

        /**
         * Called when the user rolls over a tool
         * Adds the over class ({@link #toolOverCls})
         * @private
         */
        onMouseOver: function() {
            if (this.disabled) {
                return false;
            }
            this.el.addCls(this.toolOverCls);
        },

        /**
         * Called when the user rolls out from a tool.
         * Removes the over class ({@link #toolOverCls})
         * @private
         */
        onMouseOut: function() {
            this.el.removeCls(this.toolOverCls);
        }
    });