I've been using GWT for years and years but recently my customers have a
problem that I can't reproduce, and they're remote so I can't just go check
it out in person.
They're getting an unresponsive script error, and the browser will tell
them where it is, but the code is obfuscated.
I'm
I've had a long-poll implementation using gwt for a long time now. It
defers the response until either an update or a timeout occurs. It works
well, but it uses both a socket (inexpensive) and a thread (expensive), so
I'd like this to use the async requests introduced in servlets 3.0. I've
Seems you can set classloading priority in eclipse so I reordered things
and now it is fine. Sorry for the trouble (and the typo on "its"!).
On Wednesday, November 2, 2016 at 11:22:47 AM UTC-7, rjcarr wrote:
>
> I have a really old GWT project that I just tried to comp
I have a really old GWT project that I just tried to compile with gwt 2.8.
The compilation was fine (I use ant), but when I opened up eclipse, and
pointed it to the new gwt libraries, I am getting compile errors like this:
org.apache.tools.ant.types.FileSet: Can only iterate over an array
I have a javascript widget (note, not gwt widget) that takes a javascript
object as input. If I have the JSON representation of this object as a
string I can turn it into a javascript object using JSON.parse() and
everything works fine.
However, the data itself will be generated on the
I have an old project (been around since the early days of gwt) that's
pretty large (the compiled javascript file is about 600KB). I'm using GWT
2.7 and at some point a while ago the old dev mode stopped working
(basically the browser wouldn't load the plug-in) and so I've lived without
it.
The script path has Trust but nothing else does. Generally, this isn't a
GWT problem.
Good luck!
On Monday, April 13, 2015 at 10:35:35 PM UTC-7, mohit wrote:
Hi I am trying to add a .js file
https://code.google.com/p/geoxml3/#Basic_Usage to my GWT project.
I have made the entry in my
So I have an existing class in javascript that takes an element and then
draws into it using a canvas. In javascript, you create it like this:
var timeline = new Timeline(document.getElementById(canvas));
I'd like to wrap this in GWT using a JavascriptObject but I'm not sure how
to create
Ha, not a stupid question at all ... it seems that was the problem! Thanks
so much, good thing I copied and pasted the code into the question!
But more generally, is this what I should be doing? Or should I use a
different approach for what I'm trying to do?
Thanks again!
--
You received
To create the overlay type I also tried this:
return new $wnd.Timeline(canvas);
But it didn't seem to make a difference.
Maybe I'm not using the right functionality here? I'd basically like to
create an object in pure javascript but overlay it with java to have it
available to other
this, right?
Thanks!
On Monday, January 26, 2015 at 5:47:07 PM UTC-8, rjcarr wrote:
I'm using client logging and have been for a while. Things worked fine in
2.6 but when I switched to 2.7 I got a few logging config errors as
handlers were no longer supported. After correcting
27, 2015 at 1:34:44 PM UTC-8, rjcarr wrote:
So I looked at the logging module's xml files and it seems most of the
things I'm disabling are disabled by default. So, I changed my module file
to just be this:
inherits name=com.google.gwt.logging.Logging/
set-property name
I'm using client logging and have been for a while. Things worked fine in
2.6 but when I switched to 2.7 I got a few logging config errors as
handlers were no longer supported. After correcting these and opening my
app in a browser I get a white popup window in the upper left (looks like
I have a fairly large GWT application that works fine until it is behind
SSL. When that happens whenever the page is reloaded on about the 5th try
(but it doesn't seem to have a pattern) I'll get an error that is something
like:
__gwt$exception: skipped: Cannot read property 'Z' of null
I recently updated to GWT 2.7 on a project that's been using GWT since the
beginning and everything was fine. I develop on a Mac and I didn't notice
any problems.
However, there's a nightly build that happens on Linux (RHEL) and checking
there when I start my GWT web app a random PopupPanel
First of all, I got this working yesterday on a different computer using
the latest eclipse (luna).
But today I installed the google plug-in for eclipse 4.2 (juno). I have an
old gwt project that I marked use google web toolkit and I pointed it to
my installed sdk (2.6.1) in the Web Toolkit
I'm trying to export GWT methods using JSNI and I'm not having a lot of
luck. And sometimes things happen as they should and other times they don't
and it seems to be magic that is making it happen. It seems the export is
happening correctly (i.e., javascript can call the GWT methods) but once
No, nothing changes from what I can tell. I don't mean for you to be
distracted when I say it sometimes works. And the example I gave using a
Logger is just one example; I see the same 'undefined' problems no matter
what type of member I try to dereference. I'm more interested in if what
I've responded a couple times so I apologize if you get multiple copies but
it wasn't showing up in the thread.
Just wanted to say this worked and thank you so much. I've been battling
this problem for quite a while. I don't know why this information isn't in
the docs but it should be added
Using the DOM directly you'd add an event listener to the document (there
are several ways to do this).
But looking at the GWT API I don't see a way to do this. I've looked at
Window and Document and neither seem to have anything about adding key
handlers. In order do this you need to use
The subject sums it up pretty well, so let's get right to code:
public class Main implements EntryPoint {
public void onModuleLoad() {
export();
}
public void log(String msg) {
...
}
public static native void export() /*-{
$wnd.log =
;
On Friday, February 14, 2014 10:51:13 PM UTC-8, rjcarr wrote:
The subject sums it up pretty well, so let's get right to code:
public class Main implements EntryPoint {
public void onModuleLoad() {
export();
}
public void log(String msg) {
...
}
public static native void
My goal is to initiate RPC calls directly from javascript. I have come up
with ways to fake callbacks (because of the asynchronous nature of RPC) but
I can't figure out how to get custom objects into javascript.
So, I've created a class named Interop and I statically create the service
I'm
Need help with manipulating java originated objects in javascript
My goal is to initiate RPC calls directly from javascript. I have come up
with ways to fake callbacks (because of the asynchronous nature of RPC) but
I can't figure out how to get custom objects into javascript.
So, I've
I have a pretty large project that's over 7 years old that has used GWT
from the very early days and is nearly 100% GWT (i.e., there's very little
manually written javascript). However, we'd like to transition the client
to be written in javascript, but if possible, we'd like to retain the GWT
I have a rather large and rather old project that is nearly 100% GWT. For
a number of reasons I'd like redo things and write the UI in manual
javascript / html / css. However, it'd be a huge pain to try and serialize
all of the data that GWT is currently doing for me.
I've been thinking
Hi Mohammed-
Thanks for taking a look and thanks for the response, but I don't think you
understood my question (or I wasn't clear enough).
I realize that I'm breaking the serialization policy. Specifically,
Subtype is in the server package and not the client (its parent is
Serializable, so
I have a rather involved, but hopefully not unique, serialization question.
I have a basic type that also has a more detailed subtype. So, to keep it
simple, say I have:
package client;
class Type implements Serializable {
String name;
}
And a subtype:
package server;
I'm allowing the user to input a date and time and I'm using the pattern:
DateTimeFormat format = DateTimeFormat.getFormat(-MM-dd HH:mm);
However, the date is specified as UTC, so if a user were to put in:
2013-01-01 15:30
This will parse fine, but when printing out the parsed date
.
On Thursday, February 7, 2013 2:24:29 PM UTC-8, rjcarr wrote:
I'm allowing the user to input a date and time and I'm using the pattern:
DateTimeFormat format = DateTimeFormat.getFormat(-MM-dd HH:mm);
However, the date is specified as UTC, so if a user were to put in:
2013-01-01
You'll probably want to read most of what is here:
http://code.google.com/webtoolkit/doc/latest/DevGuide.html
And here:
http://code.google.com/webtoolkit/doc/latest/tutorial/index.html
But generally just go here:
http://code.google.com/webtoolkit/overview.html
On Apr 14, 3:17 pm, The Main
Hi Rajesh-
From your description you'll likely want to keep the data (dates,
schedules, appointments) separate from the actual rendering of the
calendar. There's a UI table in java which I believe is called
TableModel (or JTableModel). You won't be able to use this directly,
but it should give
Hi Eric-
I'm not seeing why a DockPanel or a VerticalPanel won't do what you
ask. If you don't set a fixed size for the panel's cells it should
readjust whenever the content in those cells change.
It sounds like you want the center panel to take up the remaining
space of the window? If that's
Are you asking to see how the rpc requests and responses are
serialized? If so, why?
On Apr 14, 4:09 pm, Leung leung1_2...@yahoo.com wrote:
Hi
Is it possible to view the GWT RPC transaction on tools like ethereal?
Thanks
Ming
--
You received this message because you are subscribed to the
Hi Bhavin-
I'm not sure what an IE8-tab is. Do you just mean a tabbed
interface? If so, you'll probably just need to check out the
TabPanel:
http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/user/client/ui/TabPanel.html
Putting the tabs a the bottom is going to be
Hi Bastian-
Your questions lead me to believe that you don't fully understand what
GWT is or does.
The GWT simply rewrites java code into java script. This is entirely
a client thing that has nothing to do with a server.
Now, there is also GWT RPC, which allows this rewritten (or
translated)
I use servlets because of their ease of use with GWT RPC. Maybe GWT
RPC integrates with python nicely now (without needing to use JSON)?
I really don't know, I haven't tried it.
As for servlets, just like everything else in java, it's only as
complicated as you make it. If you don't need struts
Not exactly client-side, but I generate charts on my server using
JFreeChart and it's pretty nice. I do this because there's a lot of
data in my charts and it doesn't make sense to send it all client-side
first.
At some point I want to do some client rendering and for this I've
been looking at
I'm confused, why not just use this?
http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/user/client/Window.html#open(java.lang.String,
java.lang.String, java.lang.String)
On Mar 21, 9:39 am, Werner Assek was...@jahia.com wrote:
Hello,
I am trying to use a GWT native
There are a number of ways to do this depending on your situation.
You should read up on CSS positioning. Try here:
http://www.w3schools.com/css/css_reference.asp#positioning
Generally, you'll be using the properties such as: text-align,
vertical-align, top, left, and sometimes margin.
Do some
If you are adding multiple handlers to your button then there isn't a
propagation ... they are all sibling actions. So, what you're trying
to do wouldn't work.
I'm fairly sure the 'onBrowserEvent()' method is the initial event
handling method. You would need to override this in your custom
I'm pretty sure websockets is an HTML5 feature that needs to be
supported in the browser. Since it isn't yet well supported it likely
isn't worth spending the time implementing it in GWT.
If you're looking to implement push notifications then it is fairly
trivial to do in GWT. I'm sure if you
If the snippet has nothing to do with GWT just put it in your html
page directly.
On Dec 8, 12:23 pm, Jmu test0...@gmail.com wrote:
I would like to embedd the below Javascript on GWT1.4 client side
code. Anyways to acheive this?
div id=lpButDivID-XXX/div
script type=text/javascript
The GWT will compile for IE by default so that shouldn't be your
problem. If you open your page in IE and nothing is shown you likely
have a javascript error. Your best bet is to run the app in devmode
(using IE, of course) and see what errors are thrown. That should
give you some direction as
Is this a GWT question? It sounds like a generic polymorphism
question.
If the latter, you have two options. Either add wing span information
to the parent type (Animal) or do explicit checks for Birds and then
do a cast.
Good luck!
On Dec 8, 9:11 am, DaveC david.andrew.chap...@gmail.com
Have you looked at the create() method of the GWT class?
On Dec 8, 9:03 am, Gaurav Vaish gaurav.va...@gmail.com wrote:
Hi,
I have a peculiar situation in my application.
I need to instantiate a class given its name. The name is determined
dnyamically.
In JavaScript, it's easy to do...
I (and likely others) am not following what you mean here. What do
you mean by Window()? Are you saying that your results are currently
going to a new browser window but you want them to instead go into a
tab of the current window?
On Dec 8, 9:01 am, Ross McKinnon r.mckinno...@googlemail.com
I haven't looked too closely, but you are using an array of lists.
Are you sure this is what you're intending? From your explanation it
seems you'd need only a one dimensional data structure.
On Dec 8, 7:10 am, Jan jan.widm...@gmx.ch wrote:
Hi Everybody,
For my actual GWT Project, i need to
I've been using GWT for years (since around release 1.4) but I'm
having a problem with a stack trace I can't figure out. I develop on
a mac and primarily test with Safari and Firefox. My application has
worked in IE(8) in the past but in my most recent test it is failing
and I can't figure out
I've been using GWT for several years now but after updating to the
2.1.0 release I'm seeing hundreds of warnings, mostly to do with the
deprecation of ui panels (e.g., DockPanel). I assume the panels
weren't strictly compatible with the UIBinder (something I haven't
gotten into), so new
If you don't use any services you could use a gwt app in a browser
without internet access.
Otherwise, you'll need to embed a browser into your desktop
application. GWT is a web platform and as such needs to run in a
browser.
On Oct 22, 1:52 pm, mattlf matthieu.lab...@gmail.com wrote:
Hi
I
I have an application where an Image object gets an updated url quite
often from the result of a user action. I'm running into problems
where if the image is updated (i.e., the setUrl() method is called)
more than once before the image is actually loaded, then the image
doesn't load correctly.
From what you've posted it doesn't look like a valid URL. A query
string, as far as I know, is a series of key=value pairs separated by
. You posted this:
http://127.0.0.1:/Dummy.html?debugparam2gwt.codesvr=127.0.0.1:9997
Which doesn't look correctly formed. Try this:
If you're using a desktop application then you really shouldn't be
communicating with a GWT server. You can create non-GWT servlets in
your web application and I'd recommend using that. Once you have that
set up you can use whatever method you want (GET, POST, Basic, Web
Services, etc ...).
This is a tough question because every browser is going to be
different, every environment is going to be different, and every
physical machine is going to be a little different.
Maybe you can tell us where you're at now and where you are having any
performance problems?
I think I have a rather
I'm pretty sure you only have 3 options:
1) Keep the value in javascript. I can't tell from your description
if your page gets reloaded. If it does reload, then you'll lose your
javascript state.
2) Use cookies. This seems like the best solution (assuming that
your page reloads). GWT has a
Even if you use tomcat you can still use the development mode. Look
into using the '-noserver' option for DevMode. I also use tomcat and
it works fine for me.
Good luck!
On Aug 20, 10:21 am, Greg Dougherty dougherty.greg...@mayo.edu
wrote:
I have a web app that displays just fine in the
Single sign on is a feature that will be offered by your servlet
container. Depending on which you choose you should have several
options for how to implement this.
On Jul 27, 1:44 pm, DKeller keller.di...@gmail.com wrote:
I need to build a set of GWT Aplications, each one separate of another
It's a servlet request, just like any other request. I don't think
there is a tremendous amount of overhead ... the gwt framework just
has to dispatch the request to the proper method and deserialize
whatever you passed.
Making a request is expensive in general, but I don't think rpc calls
are
So I understand gwt's rpc serialization and I've been using it for
quite some time.
However, I'm wondering if there is a manual javascript serialization?
Let me explain ...
Passing things over rpc works great for dynamic data, but what if you
have initialization data that doesn't change? Since
I have a really old GWT project and I've been using GWT for many years
now, but I need a little guidance on how this works.
I have a serializable data structure (DTO) that I've been passing via
rpc and it's been working great. However, there are a number of
things I'd like to keep in this data
Instead of adding your event handlers to your composite you should
instead add them to the main component in your widget. Since you need
to capture mouse and key events you'll want to use a FocusPanel
(instead of a FlowPanel). You'll want to add a ClickHandler and one
of the Key Handlers to the
What Jim said, or: com.google.gwt.i18n.client.DateTimeFormat
On May 14, 7:00 pm, Jim Douglas jdoug...@basis.com wrote:
Just use java.util.Date; ignore the deprecation warnings.
On May 14, 6:13 pm, Sabbir leo.sh...@gmail.com wrote:
the methods in Date objecat as getTime, getHour, etc are
There are probably hundreds of java xml libraries out there to use.
Also, you should read this:
http://code.google.com/webtoolkit/doc/latest/DevGuideCodingBasicsXML.html
On May 12, 10:52 pm, MH zvi.schrei...@gmail.com wrote:
I want to write some Java code that can run either server-side or in
Hi Alan-
The short answer is yes, you can use tomcat (stand-alone) instead of
jetty (gwt embedded). The simple solution is to just add -noserver
to your devmode launcher.
You can also modify the eclipse lauch config file to do this same and
then you have integrated debugging. You might have to
I don't have the code in front of me, but you just need to know what
you named your form elements. The FileItem has a getFieldName()
method, so just look for the name of your hidden field.
On May 11, 8:44 am, heyyo handecano...@gmail.com wrote:
Hi, I created a form panel, I can upload file and
I've recently began using a javascript library that is based on
(requires) jquery so I'll be needing to write a lot more JSNI than I
have in the past.
I've actually got jquery working with jsni without too much trouble,
but now I'm having problems with data types.
I struggled quite a bit getting
You really don't need anything with GWT to accomplish this. Create an
image with a URL (traditional img or Image()) and have a servlet
field this URL. Get the image bytes out of the database, set the
correct mime type in the response, and pipe the image bytes through
the response's output
If you no longer need the handler then yeah, you should remove it,
because you don't want to execute code blocks (onClick()) that are no
longer needed or used.
But it certainly isn't required.
On Apr 12, 2:32 pm, macagain rgk...@gmail.com wrote:
Is it required or even good practice to manually
You would need to embed things (i.e., widgets, most likely images)
into an absolute panel and then change their positions within the
panel on the navigation action. By moving the items in the front
faster than in the back it achieves a 3D look.
Good luck!
On Apr 11, 12:01 am, ko_aung
This is almost certainly not possible using GWT. The problem isn't
with GWT but with the restrictions on the browser. The only way it
would be possible is with some sort of plug-in (ActiveX, Applet,
Flash) that could directly access your system's resources (i.e., rs232
ports).
To make this work
Hi Bonor-
Here's a quick algorithm. I'm sure it isn't complete so fill in the
gaps as necessary:
1) Extend the TextBox type so it knows what row of the table it is
being added to.
2) Create a FlexTable and add your TextBoxes to it, passing it the
current row of the table. Be sure to add a
Hi Vertik-
The gwt-rpc mechanism uses its own proprietary object serialization,
and as such, cannot be used as a normal web service (i.e., an xml
web service generated from a wsdl). I could *definitely* be wrong
about this, so seek a second opinion.
You can still use GWT for other things, just
Hi Deep-
Could you elaborate on this a little bit?
I need to use POST methods with user defined objects in the web svc
calls
User defined objects where ... in javascript? In java? If the
latter, why not use gwt-rpc to move around these beans? You would
just need to make sure they are
As far as I know, anything you can do outside of GWT you can do within
GWT. For your example, you'll want to look into the Anchor type.
There are many other ways to do this, however, depending on how fancy
you want to get. You could have a scroll pane that is scrolled when
you click a letter.
How do you read a text file in GWT? What does that even mean?
If you mean reading a zip file on the server, then that isn't a gwt
question, but you should look into ZipFile or ZipInputStream.
On Apr 2, 5:53 pm, Henry henry...@gmail.com wrote:
I know how to read text file in GWT, that's easy.
You'll want to look into using the AbsolutePanel, as it allows you to
place widgets in arbitrary pixel space.
You might be better served using the Canvas element in this case. I'm
pretty sure there is a GWT Canvas library that will even work in IE.
Good luck!
On Apr 1, 10:57 am, Artem
You don't give enough details to really answer your question.
Where is the xml file coming from? Who is providing it?
There are several xml parsing libraries in java. Depending on the
complexity of what you're doing, you could just parse the DOM manually
or use something fancier like jaxb.
Hi Robert-
Creating a hyperlink probably isn't the first thing you want to do.
You'll likely want to play around with panels and labels and images
and then start adding click handlers to those things.
A hyperlink is very similar to a label, but it also carries history
information. That's almost
First of all, only classes in the server portion of your module have
access to the web.xml file (since browser client's don't have access
to the WEB-INF folder).
So, assuming you're in the server portion, you can just open the file
with, say, a FileInputStream. However, I've been programming
Your question wasn't very clear, but as I understood it, I don't think
anyone has answered you yet.
You're asking why does gwt emulate the sql package? Clearly, you
can't use sql in the browser (yet, I think HTML5 is adding a client
database, but I have no idea how it is accessed), so I think
For your situation, I think using the redirect makes the most sense.
This tells the browser to request another resource (i.e., the gwt
html).
The other option is to use a request dispatcher. This is basically a
servlet calling another servlet, but it sounds like your gwt is using
plain-old html,
I don't completely understand what you're asking, but if you'd like to
implement a text chat then you'll probably want to look into something
called comet. It isn't a library (I don't think) but just a technique
for holding open a socket so that your clients can receive immediate
responses to
The problem is likely exactly what you describe here: but the GWT
compiler does not find those subclasses. More specifically, those
classes aren't part of the gwt jre emulation, so that's why you're
having problems.
For the unmodifiable list, I'd just suggest not sending your list
through that
I've been using gwt for years and years now and I greatly appreciate
how much it offers. I started using gwt way back in the 1.0 (or 1.1?)
days and things have changed greatly since then (even though my
project continues). I've updated my gwt sdk along the way, but have
typically left out a lot
Hi Ramesh-
Can you point me to the place in the docs that made you think this
would be possible? As far as I know, all XHRs are restricted to the
same domain that you got the page from. I know some browsers are much
more lenient about this, but I would expect it to not work as you
describe.
Hi Vik-
Are you sure this second page also loads the translated GWT javascript
files? If so, and all the other references are in the same place, I
don't see why this wouldn't work.
Good luck!
On Feb 21, 5:59 am, Vik vik@gmail.com wrote:
Hie
I have created a button and embedded it into a
Assuming the actions of your command are different you'll need to
create a new command object for each menu item. However, you can
create your own Command type, instantiate several slight different
variations, and assign these to your menu items.
Here's an example that won't compile but
I'm not sure how to address this in GWT 2.0, but prior to 2.0 if I had
problems in IE I would run the hosted mode environment in Windows and
it would expose the problem. Since the Windows version of hosted mode
uses IE it will show you the problem that it is having (almost
certainly something
Are you sure that the class that you want to serialize (implements
Serializable) is within your gwt module package?
On Feb 9, 2:25 am, Andrea Polci apo...@gmail.com wrote:
Whenever I try to use in my services a class that implements
java.io.Serializable and not IsSerializable I get the
Hi David-
This is an interesting problem. I can see how browsers would have
different policies about how they access files on the local
filesystem. I would guess that what you're trying to do most browsers
wouldn't allow and/or support.
I think you're going to need to rethink how your help
Not sure why you're putting panels inside of panels, but I've had much
better luck with the setHorizontalAlignment() calls rather than the
CSS.
I know this isn't the proper technique as it puts styling in the
code, but it's the only solution I've found to work 100% of the time.
On Jan 29, 10:17
There are a number of ways you can address this.
The simplest way is to put your button on your web page and keep it
completely separate from GWT.
Another way is to set up a traditional form (FormPanel, I believe)
with the action set to your search url. This happens asynchronously,
but is
Since you mention columns and rows I'm going to assume you're using
some sort of HTMLTable. Add a click handler to your table and once
you get the click event back pass it to the method
HTMLTable.getCellForEvent() to determine what was clicked.
On Jan 16, 5:23 am, gwt_dev pankaj.i...@gmail.com
You'll almost certainly need to resort to javascript / JNI calls to do
something like this.
You can communicate between windows using javascript but I don't think
I've seen a way to communicate between GWT modules once they are
loaded (as that's what you'd need to do).
Have you considered using
Hi Shamoi-
Your idea sounds interesting, and I'd like to help, but you need to be
*way* more descriptive in what you mean by plug-and-play.
In general, you can have as many modules as you want, but I've only
ever loaded a single EntryPoint (i.e., a single nocache.js file), but
it might be
I think the reason it is left as an exercise is because each servlet
container handles authentication differently. The basic concept is to
secure your servlet calls in one way or another, typically defined in
the web.xml.
Your first step is to understand how servlet security and
authentication
Is there a restriction on the package the Class must be
in?
YES! Specifically, it must be in the client module (defined by the
module xml file).
Your actual code looks correct (although you could use jdk's
Serializable instead of the GWT custom one).
On Jan 8, 12:38 am, Micha Roon
I'm not exactly sure what you're asking, but I'm not sure you can edit
standard.css.
If you like standard.css but just want to modify some fields, you
could probably find where it lives, copy it to a location on your web
path, disable the standard one and load your edited one.
I'm reasonably
What is the context? What does this have to do with GWT? Where is
the println directed to?
If this is somehow making its way onto a web page, then you need to
replace \n with br and put it inside of an HTML widget.
On Jan 6, 11:46 am, Brittany bjacob...@gmail.com wrote:
The simplest way to
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