[Zope] Calling external method from javascript

[Sean Hastings]

I use something like this:

   tal:attributes="onClick
python:'%s/my_function?foo1=%s&foo2=%s'%(here.absolute_url(),foo1,foo2)"

All your arguments are passed as string representations in the URL, and your
function will have to reconvert them as necessary.

--Sean

> -----Original Message-----
> From: zope-bounces at zope.org [mailto:zope-bounces at zope.org]On Behalf Of
> Laura McCord
> Sent: Wednesday, September 29, 2004 2:12 PM
> To: Jonathan Hobbs; zope at zope.org
> Subject: RE: [Zope] Calling external method from javascript
>
>
> This is where I am at right now. I wrote a javascript function
> loadZopeMethod() and I tried it by itself and it works. But I tried what
> you suggested:
>
> tal:attributes="onclick string:showObject(event, '${box}');
> jsRoutine2(); jsRoutine3();"
>
> <A href="javascript:;" tal:attributes="onclick string:showObject(event,
> '${box}'); loadZopeMethod();">MACAddress Table</a>
>
> This does not work. Did I do something wrong?
>
> BTW thanks for your time.
>  Laura
>
> -----Original Message-----
> From: Jonathan Hobbs [mailto:toolkit at magma.ca]
> Sent: Wednesday, September 29, 2004 10:08 AM
> To: Laura McCord; zope at zope.org
> Subject: Re: [Zope] Calling external method from javascript
>
>
> From: "Laura McCord" <Laura.McCord at doucet-austin.com>
> >  I am having trouble with this part of my program. I have an onclick
> > function that needs to perform three things. I know that I should have
>
> > a javascript function that basically handles these three operations,
> > but I don't know how to call an external method from javascript. I am
> > using a zope page template if that helps. I have googled on this topic
>
> > and there is not a lot said about this situation. I did run across
> > someone using dtml and calling dtml methods from javascript but did
> > not see any examples on using it with zope page templates.
> >
> > Typically I would call a external function like this: <div
> > tal:content="python:here.deleteMAC()"> but this won't work.
>
> AFAIK javascript can not call a zope method (dtml, script or external
> method) directly, javascript has to do indirectly by loading a url into
> the browser.  You can load into a window, frame, div, etc. Here is an
> example:
>
> displaywindow.location.href = '<dtml-var
> baseurl>DisplayPage?id='+presentorpage+'&stype='+pagetype+'&path='+pagep
> baseurl>ath
>
> This one line of javascript will load a zope routine called DisplayPage
> (with a url path specified by a dtml variable called baseurl) into a
> browser window named 'displaywindow'.  It also passes some parameters
> (id, stype,
> path) to the zope routine.
>
> If you need to communicate between the client process (running in the
> users
> browser) and the server process (ie a zope routine) without the user
> seeing anything, you can accomplish this using a hidden div in your html
> (use javascript to load the url (containing your call to the external
> method) into the hidden div), this will allow you to call a zope routine
> and get some results without changing the user's browser's display. The
> zope routine you call (via the hidden div) can return javascript
> variables which you can then parse to determine what you want to do next
> (embed an 'onload' javascript command in the html returned by the zope
> routine to cause a javascript routine to execute after the hidden div is
> loaded).
>
> HTH
>
> Jonathan
>
>
>
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