Am 18.01.2010 14:28 schrieb hoboro:
I just want a response on the same page while the action is being
processed.
Just display a message at the top "Processing Request Be Patient"
thats it. when the action is done then move to the
next page with the result.
You still did not explain what you mean with "the action". So I assume
it's something done on the server side (done by a TG controller).
If it is a relatively qick action, you should use a flash() call, as
explained by Diez (note that his code is for TG2, but it's similar for
TG1). This is the standard and simplest feedback method in TG.
But I guess you're talking about an action that is somewhat slowish (say
5 seconds) and you want to give the user a feedback that the submit
button has been clicked and the request is processed.
Here is how you can do it using JavaScript with a simple widget in TG1.
--------------------------------------------------------
from turbogears.widgets import mochikit, JSSource, Widget
class WorkingWidget(Widget):
template = """<h2 id="working"
style="border:1pt solid red;padding:6pt;width:12em;display:none">
Working...</h2>"""
javascript = [mochikit, JSSource("""
addLoadEvent(function() {
connect(document.forms[0], 'onsubmit', function() {
appear('working');
return true;
})});""")]
working = WorkingWidget()
---------------------------------------------------------
To check it out, add this to the controllers.py file of a quickstarted
project. We use the index page for both displaying the form and as the
form action target, but of course you can use different pages.
In the template for the index page (welcome.kid in TG1.0, welcome.html
in TG1.1), you must show our widget and some form with a submit button:
<div py:replace="working()"/>
<form action="index" method="post">
<p>Your name: <input type="text" name="name"/>
<input type="submit" name="ok"/></p>
</form>
To simulate the slow action, let the controller sleep for 5 seconds.
Don't forget to pass our widget to the template. You can modify the
index method like this:
@expose(template="foo.templates.welcome")
def index(self, **kw):
""""Show the welcome page."""
if kw:
from time import sleep
sleep(5)
flash("Ok, I'm finished!")
return dict(working=working, now=datetime.datetime.now())
Of course, you can do more sophisticated stuff with AJAX. A simple way
of doing this is by making use of the RemoteForm widget. This will
normally give the feedback on the same page, but you can also add a
javascript redirect using the on_complete attribute.
The basic usage is explained here:
http://docs.turbogears.org/1.0/RemoteFormWidgetTutorial
Hope this helps,
-- Christoph
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