date:20090304

Re: DeckPanel causes Widget to disappear

2009-03-04 Thread Joe Cole


Arrgh. I thought I was using DeckPanel yesterday and was using
StackPanel.
The easiest way to debug it will be using firebug. Check to see it's
structue after loading - i.e. is the widget a child?
Sorry about that!

Joe
On Mar 4, 8:30 pm, Robert J. Carr rjc...@gmail.com wrote:
 Hi Joe-

 What API are you looking at?  I only see one DeckPanel.add() method:

 void add(Widget w)
     Adds the specified widget to the deck.

 I've checked both 1.5.2 and 1.5.3.  There's an inherited add() method,
 but it still doesn't match your signature.

 Are you thinking of TabPanel?

 On Tue, Mar 3, 2009 at 11:20 PM, Joe Cole profilercorporat...@gmail.com 
 wrote:

  I think the problem may be that you are not using the deckpanel add
  methods:
  DeckPanel.add(String text, Widget widget, boolean asHTML)

  Can you try that?

  On Mar 4, 1:44 pm, Robert J. Carr rjc...@gmail.com wrote:
  Hi Ian ... thanks for the response.

  Let me put it in code then:

  Widget w = new MyCompilicatedWidget();

  DeckPanel deck = new DeckPanel();
  deck.add(w);
  deck.showWidget(0);

  RootPanel.get(main).add(deck);

  // This doesn't work ... shows up as a single black line, however:

  Widget w = new MyCompilicatedWidget();
  SimplePanel simple = new SimplePanel();
  simple.setWidget(w);
  RootPanel.get(main).add(s);

  // Works fine, or even:

  RootPanel.get(main).add(new MyCompilicatedWidget());

  // End code

  Assuming I have no styles applied to my DeckPanel (which I don't), I
  don't see how this can be a CSS issue.  Thanks for the suggestion
  though, I'll dig a little deeper.

  Also, not surprising, the same behavior happens for a TabPanel, which
  makes sense because it uses a DeckPanel.

  On Tue, Mar 3, 2009 at 4:31 PM, Ian Bambury ianbamb...@gmail.com wrote:
   My approach would be to add a border to the various widget one at a time
   (1px dotted red, say) to find out which widget is not displaying 
   correctly.
   The chances are that you need a height:100% somewhere or that you don't 
   have
   an absolute height in the chain back to the body element.
   Without any code, it's not easy to be more specific (for me, anyway)

   Ian

  http://examples.roughian.com

   2009/3/4 rjcarr rjc...@gmail.com

   I have a complicated widget that I'm trying to add to a DeckPanel.
   When the DeckPanel is rendered the widget is not shown, there's just a
   thin line a pixel or two high of where it is supposed to be.  Other
   widgets added to the deck are displayed fine.

   Taking away the deck the widget displays normally.  I've been using
   gwt for quite a while now and I've never seen this.  There are no
   errors of any sort ... it just isn't shown.

   However, if I add my widget to a SimplePanel it works fine.  My
   temporary solution is to replace the DeckPanel with a SimplePanel and
   use the setWidget() method with a listner, but I'd prefer to use the
   DeckPanel.

   Is there any explanation for this?
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Re: EntryPoint onModuleLoad called multiple times over course of application lifetime

2009-03-04 Thread Vitali Lovich

Is it possible that as a result of the RPC call the javascript loads another
page or reloads the current one?

On Wed, Mar 4, 2009 at 2:30 AM, Brian Ferris bdfer...@gmail.com wrote:


 I have a relatively complex GWT application composed of my main
 application EntryPoint and a number of library modules.  I had some
 printlns in the EntryPoint for my application and the libraries and I
 noticed that they are called multiple times over the course of the
 application lifetime in hosted mode.  This is not the standard I just
 hit the reload button case where you expect to hit your module
 EntryPoint, but more of the case where a user has just hit a button to
 initiate an RPC call that then updates the UI.

 Is this expected behavior?  Something I should be worried about?  I
 apologize for not posting any code samples, but I'm hoping there is
 something simple I'm missing before I go through the work of trying to
 reproduce the behavior with a simpler code fragment.
 


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Re: No source code is available for type java.io.File; did you forget to inherit a required module?

2009-03-04 Thread ginger_ninja


Hi Raghu,

The GWT compiler complains because it doesn't support the full range
of Java classes present in your run of the mill JRE. The reason for
this can be found in asking the question; What does the GWT compiler
produce as output?. Answering this question yields a far more
pertinent question; Where does the resulting JavaScript execute?.
The answer of course is the client's browser.

Knowing this, it's fairly safe to assume that if we can achieve the
same thing using pure JavaScript in the browser (i.e. we could port
our Java code to JavaScript) then it's possible with GWT. Given that a
browser has no native mechanism that supports file IO (besides perhaps
the file input tag) then it makes sense that there would be no File
class in GWT. The GWT developers know this and to this extent they've
exposed a great deal of base Java classes (primarily the java.lang
package) as native peers. This is relatively straight-forward for
things like String which can easily be wrapped with a Java class that
provides the expected API yet are manipulated underneath the covers
using standard JS string functions.

If you're ever unsure as to whether or not a native Java class is
supported in GWT you can always refer back to the JRE emulation
reference here: 
http://code.google.com/docreader/#p=google-web-toolkit-doc-1-5s=google-web-toolkit-doc-1-5t=RefJreEmulation

Regards,

Dave

On Mar 4, 4:07 am, Lothar Kimmeringer j...@kimmeringer.de wrote:
 raghu prashanth k b schrieb:

  Hi...I am new to GWT and i'm trying to develop a small
  application...but here i need to open a directory and count the no.of
  files in it...I'm doing it as follows:

                  File dir = new File(file);
             String[] pages = dir.list();
             int count = pages.length;

 If you do that on the client-side of your application, you should
 ask yourself, how you would do that with Javascript. If you can
 come up with an answer (you can't without the use of signed applets
 or other tweaks), the compiler can't either.

 This is a question that has been answered so many times already
 that searching for the error-message, in this group should bring
 up a lot of results, including ways how to solve your problem
 (that is dependent if you really want to have a file-list of the
 files residing on the client-side or if you want ot list files
 residing on the server-side).

 Regards, Lothar
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Re: Deploying to a Shared TOMCAT

2009-03-04 Thread Sean

Hey Guys,

I want to thank you for your help. I still have had no luck, but I'm
starting to think it's on the Tomcat side. I even tried downloading a
complete exmaple of a .jsp servlet and it's not working. Even when I
link straight to the jsp which should kick off the Tomcat server to
handle it, it just comes up as text. Something isn't right here. I'm
going to contact their support.

Thanks for all your help!

On Mar 3, 10:29 am, John Ivens john.wagner.iv...@gmail.com wrote:
This is my web.xml file... this might help you out. See if you can map
your call to like parameters in my call...

?xml version=1.0 encoding=ISO-8859-1?
web-app xmlns=http://java.sun.com/xml/ns/j2ee;
xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance;
xsi:schemaLocation=http://java.sun.com/xml/ns/j2eehttp://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd;
version=2.4
servlet
servlet-nameObservationService/servlet-name

servlet-classedu.noao.tuc.odigui.server.ObservationServiceImpl/servlet-class
/servlet
servlet-mapping
servlet-nameObservationService/servlet-name

url-pattern/edu.noao.tuc.odigui.OdiGui/observation/url-pattern
/servlet-mapping
/web-app

On Mon, Mar 2, 2009 at 4:40 PM, Sean slough...@gmail.com wrote:

I do have that code, I even added in the null check just to be doubley
sure and still no go. It works in hosted mode, just with this web.xml
(and I tried removing the com.ll.server from teh Servlet-class) and I
get the same error message.

From my gwt.xml :

servlet path=/Foo
class=com.ll.server.RPCTestImpl/

That works fine, but:

?xml version=1.0 encoding=UTF-8?

web-app version=2.5 xmlns=http://java.sun.com/xml/ns/javaee;
xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance;
xsi:schemaLocation=http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd;

!-- Standard Action Servlet Configuration --
servlet
servlet-nameFoo/servlet-name
servlet-classRPCTestImpl/servlet-class
/servlet

!-- Standard Action Servlet Mapping --
servlet-mapping
servlet-nameFoo/servlet-name
url-pattern/Foo/url-pattern
/servlet-mapping

/web-app

doesn't. I've tried restarting my Tomcat to no avail. This is mind
boggling!

On Mar 2, 10:36 am, John Ivens john.wagner.iv...@gmail.com wrote:
I'll bet dollars to donuts that you are having the same problem that I
had.
The sample code works in embedded tomcat but not in external tomcat.

You need to add code something like this:

if (observationSvc == null) {

observationSvc = (ObservationServiceAsync) GWT.create(ObservationService.
class);

}

String observationServiceURL = GWT.getModuleBaseURL() + /observation;

((ServiceDefTarget) observationSvc
).setServiceEntryPoint(observationServiceURL);

Where ObservationService is your service class. ObservationServiceAsync
is
your asynchronous call.

/observation is probably /Foo in your case.

This is in your GUI before you actually call the function you have
defined
on the server side. If you don't do this, the application WILL NOT FIND
YOUR URL.

On Mon, Mar 2, 2009 at 5:26 AM, Sean slough...@gmail.com wrote:

I did restart Tomcat still no go.

#1
The latest I tried putting all the google files and Web-INF directory
in my base http directory. So I am just calling:
http://www.celticlock.com/Foo.html

I'm on a shared Tomcat server and the documentation says I can only
have one Web-INF directory there with one web.xml. So I'm trying to
get everything on an even footing.

#2
I added the com.ll.server to the servlet class after I saw it in an
example. I've tried a dozen different configurations at this point.
This is the state it's left in after I threw my hands up in the air
and decided to see if hte groups can point me in the right direction.

I think I might possibly be confused by, the Url-pattern and what
exactly is the url-pattern supposed to represent. This is where I
dislike Google's example and naming everything Foo.

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