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@zope.org [mailto:zope-bounces@zope.org]On Behalf Of Laura McCord Sent: Wednesday, September 29, 2004 2:12 PM To: Jonathan Hobbs; zope@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@magma.ca] Sent: Wednesday, September 29, 2004 10:08 AM To: Laura McCord; zope@zope.org Subject: Re: [Zope] Calling external method from javascript
From: "Laura McCord" <Laura.McCord@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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