[Seaside] Never ending poll when rendering periodical
Leandro Pérez
lperez at lifia.info.unlp.edu.ar
Mon Jul 2 12:16:18 UTC 2007
Hello everyone,
Using a periodical with a high decay value sometimes causes a never ending
poll mechanism. It seems that this depends on the type of brush being
rendered, I can't find what i'm doing wrong though.
I'm having this problem when trying to render anything with a javascript
event onXXX associated to it or simple form elements like basic checkboxes
with nothing else (like in the example).
The scenario is something like this...
Trying to render a kind of progress bar or anything alike while a long
running process is being executed server side, after the execution other
things must be rendered..
The problem takes pleace where the text is in bold
MyComponent>>renderContentOn:html
html div id:'div' with:'some content'.
(html submitButton)
onClick: (html evaluator callback: [:script |
[(Delay forSeconds:10)"Simulate long running process".
self setWorkFinished] fork
(script element)
id: 'div';
render:[:r | r div
with: [:h | h submitButton ]
waitForCondition: [self isWorkFinished]
thenRender: [:h | h checkbox]]"The problem takes
place here!!!"
]);
text: 'Spin'.
WATagBrush >> with: initialRenderBlock waitForCondition: aBlock thenRender:
aRenderBlock
self
script: ((canvas periodical)
id: (self attributes at: #id);
decay: 1000;
asynchronous: true;
evalScripts: true;
frequency: 1 seconds;
callback:
[:r |
aBlock value
ifFalse:[initialRenderBlock value: r.
r hiddenInput text: r nextId "This
is to keep decay low...generates different responses"]
ifTrue: [aRenderBlock value: r]]);
with: initialRenderBlock
When rendering simple things like this ones, everything works just fine and
the poll mechanism stops after the long running process has finished (as
expected)
<li>h text:'something..'
<li>h radiobutton
<li>h submitButton
But when trying to render anything more complex, after the long running
process has finished, the poll mechanism is still alive and posts are sent
to the server every 1 second (as stated in the frequency parameter of the
periodical)
<li>h checkbox
<li>h submitButton onClick:(h evaluator)
I'm struggling with this for a while now and i can't solve it.. it's very
frustrating...
any ideas?
help will be appreciated.
Thanks a lot,
Leandro
i'm currently using
VisualWorks NonCommercial, 7.5
Seaside version 2.7b1.1
Scriptaculous 2.6-mb.8
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