Tnx for the example Juergen, I'm sure this will be useful.
Juergen Donnerstag wrote:
That that is true as well. You can not render a component inside a
view, because these component by default get removed onEndRequest for
optimization reason. I think you can avoid it by calling
listView.setOptimizedxxxx()
Juergen
On 12/16/05, Ari Suutari <[EMAIL PROTECTED]> wrote:
Hi,
I did some more testing. Instead of my original case, I tried to render a
component
hiearchy which is at upper level in my application and it works !
Could the problem in my original case be that the component I'm trying
to render is inside pageable listview ?
Ari S.
----- Original Message -----
From: "Ari Suutari" <[EMAIL PROTECTED]>
To: <wicket-user@lists.sourceforge.net>
Sent: Friday, December 16, 2005 2:29 PM
Subject: Re: [Wicket-user] How to render part of page (with ajax maybe)
Ok,
(Sorry for horrible formatting of this e-mail)
I took code from AjaxHandler.java to my TestAjaxHandler, so it looks
like this:
import wicket.*;
import wicket.protocol.http.*;
import wicket.protocol.http.servlet.ServletWebRequest;
import wicket.response.StringResponse;
import wicket.util.resource.*;
public class TestAjaxHandler extends AjaxHandler
{
protected String getImplementationId()
{
return "test";
}
protected IResourceStream getResponse()
{
Component[] components = new Component[1];
components[0] = getComponent();
return render(components);
}
public IResourceStream render(final Component[] components)
{
StringBufferResourceStream response = new
StringBufferResourceStream("text/xml");
response.append("<?xml version='1.0' encoding='utf-8'?>");
response.append("<components>");
if (components != null)
{
Response resp = new StringResponse();
RequestCycle requestCycle = RequestCycle.get();
Response origResponse = requestCycle.getResponse();
try
{
requestCycle.setResponse(resp);
for (int i=0; i < components.length; i++)
{
resp.write("<component cssid=''><![CDATA[");
Component component = components[i];
boolean renderBodyOnly = component.getRenderBodyOnly();
try
{
component.setRenderBodyOnly(true);
component.render();
}
catch (Exception ex)
{
resp.write(ex.toString());
}
finally
{
component.setRenderBodyOnly(renderBodyOnly);
}
resp.write("]]<component>");
}
}
finally
{
requestCycle.setResponse(origResponse);
}
response.append(resp.toString());
}
response.append("</components>");
return response;
}
}
-------------------------------
On my panel, I have a Label, like this:
Label l = new Label("ajaxTest");
l.add(new TestAjaxHandler());
add(l);
When I invoke the ajax handler, the xml I got back is:
<?xml version='1.0' encoding='utf-8'?><components><component
cssid=''><![CDATA[java.lang.IndexOutOfBoundsException: Index: 28,
Size: 17]]<component></components>
The exception occurs somewhere where markup stream is initialized (I can try to
debug there is is helpful).
Wicket is compiled from cvs as of today about 14:00 EET.
Ari S.
----- Original Message -----
From: "Ari Suutari" <[EMAIL PROTECTED]>
To: <wicket-user@lists.sourceforge.net>
Sent: Friday, December 16, 2005 1:38 PM
Subject: Re: [Wicket-user] How to render part of page (with ajax maybe)
Got it.
Ari S.
----- Original Message -----
From: "Juergen Donnerstag" <[EMAIL PROTECTED]>
To: <wicket-user@lists.sourceforge.net>
Sent: Friday, December 16, 2005 1:35 PM
Subject: Re: [Wicket-user] How to render part of page (with ajax maybe)
Try http://www.wicket-library.com/wicket-phonebook.zip to download it.
Juergen
On 12/16/05, Juergen Donnerstag <[EMAIL PROTECTED]> wrote:
sourceforge is currently blocking all mails with .zip attachments.
I'll make it available for download tonight.
Juergen
On 12/16/05, Juergen Donnerstag <[EMAIL PROTECTED]> wrote:
Please find attached a extended version of the phonebook example which
uses an AjaxHandler to handle the CheckBox and the Counter. Note: this
example is only working with a very recent version of wicket CVS HEAD.
And please note this is a starting point only (which is why it is not
in cvs). It is not a sophisticated solution.
I guess you found the dojo and scriptacoulous examples in wicket-stuff already?
Juergen
On 12/16/05, Ari Suutari <[EMAIL PROTECTED]> wrote:
Hi,
okay I'm kinda lost and I think i'm either doing somehting fundamentally wrong
or missing something really stupid......
Me too. I tried to study the junit test that (re)renders a component, but
cannot get it working with browser. What I tried was to create AjaxHandler to
component and attempt to render that component in ajax handler's respond
method:
protected void respond()
{
RequestCycle cycle = RequestCycle.get();
cycle.setRequestTarget(new ComponentRequestTarget(c));
}
It spits out following exception:
[http-80-Processor24] ERROR Index: 30, Size: 17
java.lang.IndexOutOfBoundsException: Index: 30, Size: 17
at java.util.ArrayList.RangeCheck(ArrayList.java:547)
at java.util.ArrayList.get(ArrayList.java:322)
at java.util.Collections$UnmodifiableList.get(Collections.java:1155)
at wicket.markup.Markup.get(Markup.java:143)
at wicket.markup.MarkupStream.get(MarkupStream.java:324)
at wicket.markup.MarkupStream.setCurrentIndex(MarkupStream.java:202)
at wicket.Component.validateMarkupStream(Component.java:1442)
at wicket.markup.html.panel.Panel.onRender(Panel.java:79)
When I look at markupStream members in debugger, the don't look like markup
of my panel.
I would really appreciate a list of steps required to get a component
rendered so that
result goes back to browser. I don't need a complete implementation as I can
use cvs version
of wicket and fill in missing parts myself (if they are not of huge) but
currently I must admit that I don't
know where to start from.
Ari S.
this is the error I get when i call someRequestCycle.request(myLabel) .... I
studied the simplepageTest rerender calls, I
created
a ComponentRequestTarget, set the target, and tried a lot of other things......
i keep getting the session error.
10:52:51.477 WARN!! Exception for /dojo/app?path=2:link1&interface=ILinkListener
java.lang.IllegalStateException: Internal Error: Page not attached to session.
the generated page is
<span wicket:id="wid">replaced</span><html>
<head>
<title>Error 500 Internal+Error%3A+Page+not+attached+to+session</title>
</head>
<body>
<h2>HTTP ERROR: 500 Internal+Error%3A+Page+not+attached+to+session</h2>
<p>RequestURI=/dojo/app</p>
<p><i><small><a href="http://jetty.mortbay.org";>Powered by
Jetty://</a></small></i></p>
</body>
</html>
Eelco Hillenius wrote:
Yeah. I'm just saying that you /should/ work with request targets
instead of trying to render the component directly.
Eelco
On 12/2/05, Johan Compagner <[EMAIL PROTECTED]> wrote:
that is what RequestCycle.request(component) does (and how the
SimplePageTest works)
On 12/2/05, Eelco Hillenius < [EMAIL PROTECTED]> wrote:
you should use requestcycle.setResponseTarget with ComponentRequestTarget
Eelco
On 12/2/05, Marco van de Haar <[EMAIL PROTECTED]> wrote:
Is there any concrete (simple) code example for rerendering a part of a
page? I tried myRequestCycle.request(myComponent), but all I got were
huge errors in my console.
Ari Suutari wrote:
Hi,
Project wicket-stuff contains already some AJAX components
(scriptaculous and dojo based ones). Wicket core contain a
AjaxHandler
and we provide a yet experimental component level re-render
(requestcycle.render(component). Though the latter one is no yet
accessible through a URL (that piece of code is missing; we've only
tested it with junit tests). So, yes some parts have been done, it is
not ready yet, but I think we are on a good way and some features can
be used already. Because it is in an dev stage, feedback is very much
welcome.
So, If I create my own component (that I'm going to re-render
with ajax) and add an interface based on IRequestListener I
could build an URL that calls my component via that interface
and returns re-rendering of component using
requestcycle.render(this) ?
Or is there a better way ? I took a look how IOnChangeListener is
implemented on DropDownChoice and it looks rather simple to
implement such a thing (although DropDownChoice uses it
for different purposes)
Ari S.
Juergen
On 11/25/05, Ari Suutari < [EMAIL PROTECTED]> wrote:
Hi,
We are developing applications, which have kind of a content 'push'
system,
ie. data arrives from factory automation and we visualize it
on-line.
Our traditional approach to this has been to send the data to
browser
(via applet and additional tcp socket) and use javascript to render
it.
However, I'm a little bit tempted to adjust our architecture so that
we would only push a notification of change and then use ajax
to re-render part of page.
Would it be possible with wicket ? Typically, the part that
would be re-rendered with ajax is just a text field or a table
(rendering whole page is too slow, since the data rate
can be quite fast; also flashes too much for slower cases).
There was some discussion on mailing list that something like
this would be in 1.2 ?
Ari S.
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