Ext.define('Oficina.view.FileDownload', {
    extend : 'Ext.panel.Panel',
    alias : 'widget.FileDownloader',
    hidden:true,
    autoEl : {
        tag : 'iframe',
        cls : 'x-hidden',
        src : Ext.SSL_SECURE_URL
    },
    stateful : false,
    load : function(config) {
        var e = this.getEl();
        e.dom.src = config.url
                + (config.params ? '?' + Ext.urlEncode(config.params) : '');
        e.dom.onload = function() {
            if (e.dom.contentDocument.body.childNodes[0].wholeText == '404') {
                Ext.Msg.show({
                    title : 'Attachment missing',
                    msg : 'The document you are after can not be found on the server.',
                    buttons : Ext.Msg.OK,
                    icon : Ext.MessageBox.ERROR
                })
            }
        }
    }
});