Show a nice tooltip message when (un)subscribing.

Ext.define('Docs.view.comments.Form', {

    extend: 'Ext.Component',

    alias: "widget.commentsForm",

    requires: ["Docs.Tip"],

    /**

     * @cfg {Object} user

            guideText.hide(true);

            helpLink.update("Show help ↓");

        }

    },

    /**

     * Shows a notification near the checkbox to notify user about the

     * changes subscription status.

     * @param {Boolean} subscribed

     */

    showSubscriptionMessage: function(subscribed) {

        var el = this.getEl().down("input.subscriptionCheckbox");

        var msg = subscribed ?

            "Updates to this thread will be e-mailed to you" :

            "You have unsubscribed from this thread";

        Docs.Tip.show(msg, el, 'bottom');

    }

});

    subscribe: function(subscribed) {

        Docs.Comments.subscribe(this.target, subscribed, function() {

            alert("Subscription changed!");

            this.commentingForm.showSubscriptionMessage(subscribed);

        }, this);

    }