Kalendas – Plugin para WordPress

Los primeros días de Kalendas se remontan al tiempo en que desarrollé un sitio para una vicerrectoría de una universidad en mi ciudad. La lógica del sitio requería la visualización de eventos futuros, y dado que la arquitectura de datos personales de la Universidad corría sobre los servicios de Google fue lógico usar su herramienta de calendario para alimentar el listado de eventos.

Buscando entre los agregados de WordPress que pudieran ayudarme con este requerimiento encontré wpng-calendar, un plugin que técnicamente hablando procede según los requerimientos básicos del sitio que estaba desarrollando, pero que carece de ciertos detalles que facilitarían el soporte técnico del proyecto a largo plazo, y como los requerimiento superaban la espera y la última versión del plugin se remontaba al primer semestre de 2008, decidí reusar el código y extenderlo.

Con el tiempo el nuevo agregado, que había nacido inicialmente como un fork de wpng-calendar, cambió radicalmente. Al alcanzar su primera versión estable apenas compartía unas pocas líneas de código con el plugin del que procedía.

Así nace Kalendas, un plugin que trata en lo posible de ser simple de usar. Tan fácil como agregar un widget a la barra lateral por cada calendario que se desee mostrar, declarar su título y el descriptor XML1 del calendario en Google.

Para la muestra, un botón. El calendario de eventos de tecnología de Austin – Texas2.

Eventos en Austin

RSSCargando lista de eventos...

El plugin está en estado Beta, y hasta donde he visto es funcional, pero aun así recomiendo usarlo con cuidado porque puede alterar la visual de los temas y plantillas.

El plugin está bajo licencia GPL para que lo usen, abusen y descuarticen, solo recuerden dar los créditos del caso.

Ir a la página de descarga.

Características

  • Listado de eventos de calendarios en Google Calendar.
  • Puede seleccionar un margen de tiempo para mostrar eventos.
  • Puede seleccionar cuántos eventos mostrar como máximo.
  • Se actualiza diariamente o cada hora.
    • El administrador puede forzar la actualización.
  • La información de cada evento se amplía con una ventana emergente.
  1. La última imagen de la galería es un infograma que explica cómo hacer que un calendario sea público y cómo conseguir el URL de la fuente. ↩
  2. No vivo en Austin, pero el calendario de esta comunidad es ideal para mostrar las capacidades de Kalendas. ↩

102 respuestas a «Kalendas – Plugin para WordPress»

.. and with an other agenda. I’m getting this message.

Warning: fsockopen() [function.fsockopen]: php_network_getaddresses: getaddrinfo failed: Tijdelijke storing in naamsherleiding in /home/treasury/treasury.nl/wp-content/plugins/kalendas/kalendas.php on line 669

Pretty weird huh?

Hi Stef.

The library Minimax isn’t required anymore.

Also, I noticed in your page the function fsockopen is trying to connect to an HTML tag. Maybe the URL is edited in your text editor as a reference. Check if it is underlined, if it’s the case select the broken chain button to delete the reference.

Hi Stef.

Maybe the default configuration isn’t well formed. Please, go to Options / Kalendas and edit it. If this is the situation is a bug that requires to be fixed ASAP.

Thanks for any report about this situation.

Fantastic!
It works great now.
thank you very much!

Just one small question:
Is it also possible to set the time of «Show Events Until» longer then one month? For example ‘a year’?

Thanks!

Great to hear it works!

It is possible to make the time longer. I’m workig in this subject with the client that requires this plugin, but there would be changes in the user interface and I don’t want to write code in this subjet until we know exactly what we are going to do. Maybe in a week these changes will come.

Big regards.

Hi Stef.

Kalendas has a new release. This is not the ‘final form’ my client wants, but I have added more months to the configuration form and solved 2 bugs.

It is more like a ‘stable release’ than a final product. Kalendas is still in beta stage.

Any observation would be welcome.

Hello- I have kalendas and it successfully loads a list of events from the google calendar onto my site. When you click on the link for the event, though, you do not see the event details. Instead you see a kalendas screen. I havent modified the kalendas script, so this appears to be a minor bug. Any idea how to fix?

Would also appreciate having ability to show events more than six months out.

Thanks for a useful plugin.

Hi Allen and thanks for using Kalendas.

Do you have a page where I can see this situation? Or can you give me the XML to the Google calendar so I can test it locally.

About the end time-out, it’s the most voted requirement so I think it will be in the next release.

Thanks again for a great plugin. Is the minimax plugin still required, or can I remove it? I don’t think this plugin has any purpose except to support kalendas (is that right)?

We’re all looking forward to the next release that allows events six months out. I’ve tried fiddling with the php but can’t get it to work…:(

Hi Allen.

Minimax were my general purpose library, and all my ajax-ready plugins used it: Lexi, Schreikasten, Mudslideshow, iRate and Kalendas.

But now I use the internal WP ajax library, so Minimax in theory isn’t required anymore. But maybe there are still unresolved linked dependencies.

I will check Kalendas again. Thanks for reporting the bug. Do you have a link where I can see this situation?

About the 6 months time, the new release extended the end time, check it in the Configuration item.

And check if the XML is edited in your text editor as a reference. Check if it is underlined, if it’s the case select the broken chain button to delete the reference.

Big regards.

Another question – is there a way to customize the way Kalendas displays start time and end time for an event? Right now events in the popup box look like this:

MEETING
When September, 2. 2010 8:00 pm
September, 2. 2010 10:00 pm
Where My house

Can we make it say

MEETING
Begins September 2, 2010 8:00 pm
Ends September 2, 2010 10:00 pm
Where My house

Hello Sebastian,

Great plugin, it’s going to work great for my needs.

When I initially started using the plugin it worked fine… now suddenly I’m getting an error:
‘Can’t create the events list. Check your options.’

This error is occurring within the page using the shortcode. The same calendar shows up fine when using the widget.

Any ideas?

Thanks,
Bryan

Hi,

the plugin works so far and is very nice, but when i first enter my page, i get an error like:

«Warning: kalendas_create() [function.kalendas-create]: Node no longer exists in…»

When i refresh the page, the error is gone!

Do you have a solution?

Beste regards

Christoph

I am getting the following error:

Fatal error: Cannot instantiate non-existent class: simplexmlelement in …/kalendas.php on line 309

Here is kalendas.php from line 307-319:
if($data = kalendas_readfile($url)) {
if($data[0]==»<") {
$data = new SimpleXMLElement($data); //Parse the XML
$out="»;
foreach($data->entry as $item) {
$gd = $item->children(‘http://schemas.google.com/g/2005’);
$where_attr = $gd->where->attributes();
$when_attr = $gd->when->attributes();
$out.=»».htmlspecialchars($item->title).»{$where_attr->valueString}{$when_attr->startTime}{$when_attr->endTime}».htmlspecialchars($item->content).»»; //Add the entry to the XML file
}
$out.=»»;
}
}

I don’t understand PHP and couldn’t find a reason above why this might not be working. I am really excited to use your plugin but have to be able to sort this error.

Hi Gabriel.

Unfortunatelly in Colombia we do not have paypal for donations. Thanks anyway.

I see your site calls two times thickbox.js. Deactivate the plugin wpng-calendar and check again. If this is the reason, send a thicket to the plugin developer to use the wp_register_script and wp_enqueue_script functions to solve this situation.

Tell me how it goes so far.

Kind regards.

Hi!

Ok, sorry to hear that. I like to donate to stuff I like.

Anyway, thanks for your help so far! Though, it didn’t work. I have now deleted wpng that anyhow didn’t work as advertised, but I still don’t get any popup box.

Regards

Hi!

Now something is calling jquery two times. Disable the s3slider plugin and check. If this solved the situation send a thicket to the developer suggesting to use the functions I mentioned in the other comment.

Regards.

Hi again Sebastian.

Everything works as it should now. Thanks again for all your help!

I have two feature wishes:

* The ability to have different amount of events in the widget and the post. I would like to have the 5 upcoming events in the sidebar but all of them on a Events page. Now I have to have all events in the widget because I want to be able to display them all on the Events page.

* That the listing would show events that last several days with both start- and end-date. Exemple: 4 oct – 6 oct. This would be great! Of course should they have no end-date displayed if it is a single day event.

Once again: Great plugin!

Regards.

Hi Gabriel.

Great to hear it works.

About your request, is easy to modify the code to set different amount of time for each call to kalendas, and to modify the date if there is one event (and only one event) and it ends other day. But I wouldn’t work on kalendas for about 2 weeks.

Any other ideas you have tell me about them.

Kind regards.

The time information displayed by the kalendas widget is wrong. In google calendar, it says it start at 9:40 a.m. In kalendas in says 2:40 a.m.

My timezone settings in wordpress are set to Los Angeles such that:
UTC time is 2010-10-29 4:06:01 Local time is 2010-10-28 21:06:01

My Google ones are GMT-8

If you go to my site http://www.troop101-wa.org and look at the Nov 11 entry you can see when it starts. Then click on the Calendar on the top and go to november 11 and see that the google calendar has it correct.

Any suggestions?

Hi Dennis.

I have never tested Kalendas using a time zone with summer time. Look if you have enabled the time change booth in Google Calendar and in your WordPress (I’m not sure how to do this because I live in a country without summer time).

If you found a way to solve it, I will love to add it to the FAQ.

Warning: kalendas_create() [function.kalendas-create]: Node no longer exists in /home/troop101/troop101-wa.org/wordpress/wp-content/plugins/kalendas/kalendas.php on line 323

If I click refresh on the page it will go away, but if I click update, it show up again. I removed most of the plug-ins, to see if there was a conflict, but it still happens.

Also, for today, it says on Nov 1 there is a troop meeting today, but if I click calendar on the top and actually look at the google calendar, there isn’t a meeting…don’t know where that is comign from. Link is http://www.troop101-wa.org (i removed all the country blocks)

If I tell Kalendas to «Show events until:» two weeks after, it displays correctly. If I select one month after, I get the error. two months after = works. 6 months after = works. 1 year after works. 1 day after = no evets programmed. 2 days after = works. 1 week after = works. two weeks after = works.

one month after = error

consistantly errors with one month after

Right now its actually not display some items. Like I have an event on December 9 and it doesn’t show in the kalendas plugin, but if you click the calendar link, you can see it there.

Hi Dennis. I was in a race-against-time with a project finished yesterday. This means I have time now for my other projects, specifically Kalendas and MudSlideShow.

I’ll check the situation with the ‘one month’ and the ‘not displayed events’. Another situation to report?

Kind regards.

Hi Dennis, I’m back after 2 weeks in a project. It’s time to check those bugs in Kalendas.

Can you check two things for me? 1. Which time zone do you use in your WordPress config settings and your Google Calendar (Los Angeles or UTC-8).

Second, can you invite my account (baxtian.echeverry@gmail.com) to have this calendar in my calendar list?

Thanks in advance. I will put this bug fixing as a priority this week.

I am using UTC-8. If I used anything else, it does not display the time properly when I select the items, which is unfortunate because other items do not display properly when I run with UTC-8 (like the Whose been online Widget).

I added your e-mail address so you should be good to go.

Thanks Dennis. First idea here, dec 9 and jan 13 meetings goes in the same feed (looks like one is a copy from the other) and kalendas treat it as only one feed, that’s why only display the first meeting in the feed list (jan 13) even it’s far away. I will work on this today.

Solved the recurrence situation, and ready for next release.

In the feed there is a meeting in Nov25 but there isn’t one in the calendar… but I see you create a meeting with recurrence to create a troop meeting every 4th Thursday in the month, and Nov25 should have one…. strange it doesn’t show in the calendar but displays correctly in the feed.

Ok, the other question. Does the calendar use the (GMT+00:00) time zone or is just in my account?

Kind regards.

To have a good integration your WordPress and your Calendar have to be in the same time zone. Try setting your calendar to your time zone (pacific calendar) and setting your wp configuration to the same time zone. Also you have to edit all your calendar again. Sorry.

With the calendar in UTC time, the meeting in jan 22 starts on jan 21 at 4pm (8 hours early). Check it.

http://shareimage.org/images/88q42owgfw14ozbmls8h.jpg

I changed calendar.google.com to use GMT+8. I changed the setting in WP to use Los Angeles.
I redid the entries in calendar.google.com. They look correct in calendar.google.com put the Kalendas display has them incorrect. For example the Troop PLC Meeting in google calendar starts at 6:30 p.m., but Kalendas says it starts at 10:30 a.m. 8 hours early.

I have an hypothesis. Go to your WP general settings (the same page where you can change the time zone) and see if the two times at the right side from the time zone selector (the UTC and the local time) are correct.

Good job — THe December 9th event now shows up!!!!!!

Don’t know why the November 25th event shows up twice. Time still is incorrect when I set the Timezone as Los Angeles in WP settings If I set it as UTC-8 it displays correctly.

Great job — Time Zone Solved!!!!!!!!!!

Still a problem with reoccuring events. Like on November 25th, I deleted the reoccuring event for that day, so on the Google Calendar it doesn’t display, but on the Kalendas Calendar it is there. So to remove the confusion, I added a event that says «Thanksgiving – No Meeting».

Hola. Acabo de tener un accidente informático grave, creo que mucho y no sé cómo intentar resolverlo. Me he acordado de ti.. Verás, trabajo con un blog de wordpress y al actualizar un pluggin de calendario me ha salido este error : Fatal error: Cannot redeclare class wp_locale in /h2/ecoasis.es/home/html/wp-includes/locale.php on line 14. A partir de aquí ya no me es posible entrar en la página. No tengo ni idea de qué puedo hacer. ¿alguna sugerencia? No tengo copia de seguridad y el pluging subido era event-calendar 6.5.2.1
Gracias
SALID

Si tienes acceso FTP al directorio donde está el sitio, modifica el nombre del directorio del plugin que te está poniendo problema (wp-content/plugins/event-calendar). Eso hará que se elimine el plugin de la base de datos.

This just started….I didn’t notice it when I went to RC1, but when I went to RC2 I noticed it.

http://www.troop101-wa.org if you go to the site, the events look okay…
Upcoming Events
Today
Troop PLC Meeting
Cancelled – Troop PLC Meeting
Jan 8
Fundraiser
Christmas Tree Pickup

But if I click the update button, extra information appears:
Upcoming Events
TodayTroop PLC MeetingTroop PLC Meeting

When
Thursday, Jan 6. 2011 06:30 PM

Thursday, Jan 6. 2011 07:30 PM

Where
Old South Bay Fire Department

Cancelled – Troop PLC MeetingCancelled – Troop PLC Meeting

When
Thursday, Jan 6. 2011 06:30 PM

Thursday, Jan 6. 2011 07:30 PM

Where
Old South Bay Fire Department

Jan 8FundraiserFundraiser

When
Saturday, Jan 8. 2011

Sunday, Jan 9. 2011

That information is in the Google Calendar entry, but usually doesn’t display.

Hi Dennis and happy new year.

Looks like a theme’s bug. I saw it because I was the first reader of the day and the calendar gets updated while I read the page. But I have updated the page and I lost the code with the problem.

Can you please set kalendas to get updated every hour, to get a way to see the bug myself.

Hi Dennis. We are in our ‘feria’ here in Manizales (my little city) and I didn’t have time until today to check the bug.

Looks like some plugin you use is applying a filter deleting the format that hide the ‘window’. The strange thing here is the filter gets applied only when calling the ajax functions.

Try to find which plugin is responsible of this filter (maybe cache, security check, comment format or CEO plugin) and I will check what’s going wrong.

I tried disabling all of the plug-in’s to see if it would make a difference and it did not. RIght now they are all disabled except for askimet, minimax, online backup for wordpress, rsvpmaker, wordpress betatester

Hi Andreas and thanks for the translation. I will add them into the plugin inmediatly.

Send them to baxtian dot echeverry at gmail dot com.

Also, I will add a link to your page from kalendas’ pages. I need a description of your site to add the link.

Danke schön!

The only strange thing is your page loads the same javascript library two times, and it always gives an error. But I can’t figure how tho solve this. Thats why I have sugested to disable all the plugins….

Test disabling all plugins and enabling kalendas, then check in your html for ‘thickbox.js’ and test if this library stills loads two times.

I disabled all plugins but kalendas and get the same thing. With the plug-ins enabled and disabled, I only saw this once:

script type=’text/javascript’ src=’http://www.troop101-wa.org/wordpress/wp-includes/js/thickbox/thickbox.js?ver=3.1-20110528′>

Does this mean anything? I opened a ticked on th WordPress 3.3 beta forums and someone said this was the issue: Confirmed with a test on the site linked in the description (modified thickbox.css/js with chromium inspector).
«In thickbox.css display:none was replaced by visibility:hidden (line 52). The thickbox will not be displayed if there is no property ‘display’, because thickbox checks the property ‘display’ (line 208 in thickbox.js). If you use e.g. tb_show in a javascript, it will not show the thickbox.

«

Well, yes, this is how it happens, but as you use a beta I will wait until the official release. To solve your bug go to /wp-includes/js/thickbox/thickbox.css and change visibility:hidden with display:none (line 52).

I added some bad data in my google calendar entry and now my kalendas entry won’t display correctly. I deleted the bad data, but I can’t get the kalendas entry to display at all. I deleted the plug-in and readded it, but it still won’t display correctly.

website is http://www.troop101-wa.org the bad data I believe is the & sign in description field. The error I am getting is:
Warning: SimpleXMLElement::__construct() [simplexmlelement.–construct]: Entity: line 1: parser error : xmlParseEntityRef: no name in /home/dennis/public_html/wordpress/wp-content/plugins/kalendas/kalendas.php on line 405

I love your plugin. I have a client that I would love to use a plugin on his site. However, I see that it hasn’t been updated in a while. Are there any plans to do so or is has development stopped?

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