from:"lineman78"

This is way too complex, just stick to overlay objects and the
json2.js library(assuming you are targeting IE6 you need to include
it, otherwise it is provided) with JSON.parse and JSON.stringify.

On Sep 23, 9:11 am, Ciarán ciaran.mccann@gmail.com wrote:
 If your interested in GWT client-side JSON serialization and
 deserialization check out the below link

 http://flax.ie/flax-engine-gwt-client-side-json-serialization-and-des...

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Re: Correctly implementing history

This javadoc seems to have the full implementation:

http://google-web-toolkit.googlecode.com/svn/javadoc/2.0/com/google/gwt/user/client/History.html

On Sep 23, 12:05 pm, Greg Dougherty dougherty.greg...@mayo.edu
wrote:
It's sad that the JavaDoc and that link I gave above both have a lot
of useful information, but neither one has the complete
implementation. :-(

On Sep 22, 6:35 pm, lineman78 linema...@gmail.com wrote:

I am assuming that you just have history listeners everywhere that
matters. There are multiple ways you can fix this, you can look at
the value of the history token in the constructors, or you might
simply be able to call History.fireCurrentHistoryState() right after
you add your listener.

On Sep 22, 4:47 pm, Greg Dougherty dougherty.greg...@mayo.edu wrote:

So I swiped the code
athttp://code.google.com/webtoolkit/doc/latest/DevGuideCodingBasicsHist...,
and have somewhat implemented History. HTe problem is I haven't
completely implemented it.

If my app is running, going forward and backward in the history works
just grand. I can even paste in a previous bookmark, and it will be
dealt with correctly. However, once you've left my app, all bets are
off.

If I click on a link in my app that takes me outside of my app, when I
hit the Back button my app rebuilds from scratch, completely ignoring
the history in the Navigation bar, and then it going to the usual
starting tab. How do I get my app to look at the Navigation bar, and
use the history that is there?

TIA,

Greg

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Re: Modify files in .jar libraries

You can just treat a jar file as a zip file, nothing special except
structure and extension.

On Sep 23, 2:30 am, Daniela Iervolino daniela.ie...@gmail.com wrote:
 Hi everyone!
 Does anyone know how modifing files from .jar libraries?
 I've tried to modify some files from a library (for example, gwt-
 user.jar, from Eclipse and from gedit) but it doesn't save anything!!
 Can someone help me?

 P.S. I'm on Ubuntu Linux!

 Thanks

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Re: Chat with GWT

May I suggest ICEpush for chat app, here is a GWT chat demo:

http://demos.icepush.org/icechat-gwt/

On Sep 23, 7:26 am, danigb dan...@gmail.com wrote:
 There's a library (emite.googlecode.com) that allows to send and
 receive messages from a xmpp server using a proxy using the BOSH
 technique (http://xmpp.org/extensions/xep-0124.html) Maybe it helps
 Bests
 Dani

 On Sep 22, 9:15 am, Thomas Martin martin.thomas...@gmail.com wrote:

  Can you give the error you got ?

  Generally, it is better to implements IsSerializable, which is the
  serialization interface of GWT, rather than Serializable, which is the
  classic Java serialization interface, which should work but causes
  sometimes some issues.

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Re: Crop a photo stored locally

If you want to do everything client side you will have to use a Java
applet.  To do it with GWT you will have to upload the file to the
server.  Doing so depends on your server-side approach.  Whichever
approach you are using you should research multi-part form data for
uploading a file.  You will then need to save the file locally, or you
could try to save the raw file data to a database.  You will then need
to expose the image via a RESTful GET which you can point an img tag
at.  Then once you integrate something similar to the UI libraries you
suggested above you will then send the bounding box back up to the
server and use Java image manipulation libraries to crop the image and
then resave it in the method you used before.  Remember, GWT can
integrate with any javascript library, so you can wrap any of the UI
libraries above with some JSNI methods.

On Sep 22, 9:02 pm, Josh Tinkham unitin...@gmail.com wrote:
 I'm building a costume database program for a local high school.  I
 want the kids to be able to take a picture of a costume, load the
 memory stick on a PC and upload the pic via a FileUpload widget, then
 present them with a photo cropping gui to cut down the picture.  From
 there the post-cropped pic goes back to the server and into a
 database.

 There's lots of stuff on this forum saying I can't read the JPG
 directly from the client browser, so I think that means I have to use
 the form widget with an HTML servlet (right?).  Once its on the
 server, I need to get the pic back to the client (how do i do that)?
 Then present it with a cropping mechanism.

 There are some really slick looking croppers on the web, but haven't
 found anything on how to pull them into GWT:
 Yahoo 
 ImageCropper:http://developer.yahoo.com/yui/examples/imagecropper/simple_crop.html
 Kroppr:http://kroppr.rborn.info/
 Jcrop:http://deepliquid.com/content/Jcrop.html

 How can I get these overlaid on my picture, then get the results after
 the user has accepted their crop operation so the numbers can be sent
 back to the server to actually crop the pic?

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Re: Correctly implementing history

2010-09-22 Thread lineman78

I am assuming that you just have history listeners everywhere that
matters.  There are multiple ways you can fix this, you can look at
the value of the history token in the constructors, or you might
simply be able to call History.fireCurrentHistoryState() right after
you add your listener.

On Sep 22, 4:47 pm, Greg Dougherty dougherty.greg...@mayo.edu wrote:
 So I swiped the code 
 athttp://code.google.com/webtoolkit/doc/latest/DevGuideCodingBasicsHist...,
 and have somewhat implemented History.  HTe problem is I haven't
 completely implemented it.

 If my app is running, going forward and backward in the history works
 just grand.  I can even paste in a previous bookmark, and it will be
 dealt with correctly.  However, once you've left my app, all bets are
 off.

 If I click on a link in my app that takes me outside of my app, when I
 hit the Back button my app rebuilds from scratch, completely ignoring
 the history in the Navigation bar, and then it going to the usual
 starting tab.  How do I get my app to look at the Navigation bar, and
 use the history that is there?

 TIA,

 Greg

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Re: Singleton Class in Development Mode

2010-09-22 Thread lineman78

Which is the way it should correctly act because that is how
Javascript acts.  If you want a singleton to span multiple tabs and
sessions go back to an applet.  If you want similar behavior in
javascript you need to use cookies, but be aware of the associated
security issues.

On Sep 22, 10:34 am, Moshe Solomon udel...@gmail.com wrote:
 I'm not sure if this is because of the GWT plugin, but maybe you guys
 know...

 I have a Singleton class which I use to store the user authentication.
 But When I reload my page (with F5) the singleton is reloaded, as if
 the VM is restarted.

 public class AuthenticationManager {

         private static final AuthenticationManager m_instance = new
 AuthenticationManager();

         private boolean m_authenticated = false;

         private AuthenticationManager() {
                 System.out.println(AuthenticationManager Constructor);
         }

         public static AuthenticationManager getInstance() {
                 return m_instance;
         }

         public boolean isAuthenticated() {
                 return m_authenticated;
         }

         public boolean authenticate(String uid, String pwd) {
                 if (uid != null  uid.trim().length()  0) {
                         if (pwd != null  pwd.trim().length()  0) {
                                 return (m_authenticated = true);
                         }
                 }
                 return false;
         }

 }

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Re: How do i get the row index and column index in each cell on mouse over event

2010-09-21 Thread lineman78

Cell cell = view.getCellForEvent(event);
int row = cell.getRowIndex();
int col = cell.getCellIndex();

OR

private int getRowForEvent(MouseEvent? event)
{
Element td =
getEventTargetCell(Event.as(event.getNativeEvent()));
if (td == null)
{
return -1;
}

Element tr = DOM.getParent(td);
Element tbody = DOM.getParent(tr);
int row = DOM.getChildIndex(tbody, tr);

return row;
}

On Sep 21, 4:24 am, Ivan lin.shihh...@gmail.com wrote:
 Hi all,

     I've searched much document about how to get the row index and
 column index on mouse over event, but i'still have no idea about that.
     Can you give me some example code tell me how to do that ?

     I can get element like below step, but how do i to get row index
 and column index ?

         public void onBrowserEvent(Event event) {
                 Element td = getEventTargetCell(event);
         }

     Thank you.

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Re: ScrolPanel Question

2010-09-21 Thread lineman78

http://rcswebsolutions.wordpress.com/2007/01/02/scrolling-html-table-with-fixed-header/

On Sep 21, 12:07 pm, skippy al.leh...@fisglobal.com wrote:
Well, thanks for the respond. However, I was not all that clear.
I have very picky users and here is the real scoop:

I am using UIBinder and here is my ui.xml:
g:FlowPanel styleName='{style.outer}'
g:FlexTable ui:field='grandTotalHeader' /
g:FlexTable ui:field='grandTotalData' /
g:FlexTable ui:field='tableHeader' /
g:ScrollPanel ui:field='scroller'
tdcbWidget:TDCBFlexTable ui:field='tableData' /
/g:ScrollPanel
/g:FlowPanel

As you can see, the heading is outside the scrollPanel list, This
allows for the user to scrol the data without loosing the heading
section.

When the scrollbar is visible, the column headings do not match that
of the list.

Any ideas?

On Sep 17, 1:47 am, Santosh kumar kopp@gmail.com wrote:

Hi skippy,

ScrollPanel, its automatically adjust the scroll bars.

ScrollPanel scrollPanel = new ScrollPanel();
scrollPanel.setSize(width, height);
scrollPanel.clear();
RootPanel.get(div-id).clear();
RootPanel.get(div-id).add(scrollPanel);

On Sat, Sep 11, 2010 at 2:03 AM, skippy al.leh...@fisglobal.com wrote:
I need to ack a scrolPanel if its vertical scrol bar is visible, If
so, I need to adjust the width of the table.

Thanks

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*S a n t o s h k u m a r . k*- Hide quoted text -

- Show quoted text -

Re: Evaluating string: (A+sin(B)) where A=1, B=2

2010-09-20 Thread lineman78

There are plenty of Java implementations that do the same thing if you
would prefer sticking with Java.  Popular Java projects include
Jep(http://sourceforge.net/projects/jep/) and JFormula(http://
www.japisoft.com/formula/).

On Sep 20, 4:04 pm, Janko janko.sla...@gmail.com wrote:
 The best way I found is using something like it is described 
 here:http://code.google.com/webtoolkit/doc/latest/tutorial/Xsite.html

 Where the server would host a mathparser.py...

 I would like to evaluate the string at the server side, so the server
 implementation would call the py script...

 what do you think about this solution?

 thanks

 On Sep 20, 10:04 pm, Janko janko.sla...@gmail.com wrote:

  Hello everybody!

  What is the simplest way to evaluate an string expression with know
  parameters on the server side???

  Please help!

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Re: clearing or preventing double-click selection

2010-09-14 Thread lineman78

This works for preventing all selection on a widget.

addDomHandler(new MouseDownHandler()
{
@Override
public void onMouseDown(MouseDownEvent event)
{
event.preventDefault();
}
}, MouseDownEvent.getType());

On Sep 14, 3:53 am, Thomas Broyer t.bro...@gmail.com wrote:
 On Sep 12, 9:29 pm, decitrig rws...@gmail.com wrote:

  I'm working on an application that responds to double clicks on text
  labels, and I'd like to either disable double-click text selection or
  clear it from within the event handler. I tried $doc.selection.clear()
  in a native method, but apparently $doc.selection is not an object -
  it may be that the selection isn't occurring until after the double-
  click handler is getting called. I did try stopPropagation and
  preventDefault, neither helped.

  Any pointers?

 There's a CSS property that you can use to disable text selection:
 user-select.
 It's available in WebKit (-webkit-user-select) and Firefox (-moz-user-
 select). I can't tell for Opera (-o-user-select?).
 In IE, you'd have to listen to an onselectionstart event and cancel
 it.

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Re: clearing or preventing double-click selection

2010-09-13 Thread lineman78

In your onClick method you can call event.preventDefault() to keep the
browser from handling the event.

On Sep 12, 1:29 pm, decitrig rws...@gmail.com wrote:
 I'm working on an application that responds to double clicks on text
 labels, and I'd like to either disable double-click text selection or
 clear it from within the event handler. I tried $doc.selection.clear()
 in a native method, but apparently $doc.selection is not an object -
 it may be that the selection isn't occurring until after the double-
 click handler is getting called. I did try stopPropagation and
 preventDefault, neither helped.

 Any pointers?

 --
 decitrig

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Re: How could we know if GWT project will continue to be maintained by Google?

2010-09-13 Thread lineman78

I am pretty sure gmail is..

On Sep 13, 7:48 am, marius.andreiana marius.andrei...@gmail.com
wrote:
 Hello,

 While comparing GWT with other solutions for a long-term project, we
 wondered how could we know if GWT project will continue to be
 maintained by Google, since it's available for free and Google makes
 no (direct) profit from it.

 We tried to look at what projects Google has that rely on GWT and are
 also profitable, such as AdWords.
 Are there any others? Is any part of Google Apps using GWT? (Wave will
 be closed, so it doesn't count).

 PS: I know GWT is open source. Maintaining it by ourselves in case
 Google decides to drop support for it it's not an option for us.

 Thanks
 Marius

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Re: To cancel form submit event of FormPanel on press of enter key

2010-09-13 Thread lineman78

add a submit handler and you can call cancel on the event.

On Sep 13, 9:58 am, nirav patani nirav...@gmail.com wrote:
 Is there any way to cancel a GWT submit event on press of enter key.

 I want to perform som validations on the gwt page and then only invoke
 form.submit() method. but form gets submitted by pressing of enter
 key. Any suggestions to do the same ??

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Re: gwt-servlet.jar keeps reappearing on client side application

2010-09-12 Thread lineman78

RPC can be used even without GAE, so this is why eclipse keeps adding
it.  I am not sure if there is a way to tell it not to.

On Sep 11, 9:31 am, marius.andreiana marius.andrei...@gmail.com
wrote:
 Hi,

 On a GWT Eclipse project (which doesn't use AppEngine), although I
 removed gwt-servlet.jar, it keeps re-appearing once in a while.
 Is it needed for development mode/debugging? If not, how could I
 convince GWT/Eclipse to stop creating it?

 Thanks

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Re: Change Cursor Shape

2010-09-11 Thread lineman78

CSS attribute cursor.

http://www.w3schools.com/css/pr_class_cursor.asp

On Sep 10, 11:39 pm, udayanga ranasinghe udayanga.u...@gmail.com
wrote:
 Hi All,

 Please tell me how to change the cursor shape in MouseMoveEvent event.

 Thanks  Regards.
 Udayanga.

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Re: Difference between URL.decode and URL.decodeComponent

2010-09-10 Thread lineman78

decode and encode component is intended to be used in parts of the
query.  Take the following url for example:

http://www.google.com/search?q=fox%26hound
 |___| 
component

The bigggest difference between encode and encodeComponent is what
special chars it will encode.  Notice above %26, which is an
ampersand.  This will only be encoded with encodeComponent, not
encode.

On Sep 10, 10:00 am, Kady kaushika...@gmail.com wrote:
 What is the difference between URL.decode and URL.decodeComponent
 methods ? Any example is appreciated.

 Thank you.

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Re: Variable UI

I think you are making thins too complicated.  What are you doing with
so many images?  Browsers can do client-side scaling of images for you
if you use the img tag (background image scaling is coming in
CSS3).  It seems like you are a thick client developer and don't have
much experience with web development, am I correct. When doing
textures and gradients for web development you usually make something
that can be repeated.  Also, if you can select a CSS3 compatible
browser you can use gradients and rounded corners built in so you
don't even need images for those.  If you must do image generation
real time some cool stuff has come out with SVG lately(http://
raphaeljs.com/).  Dealing with an HTML UI is a much different mindset
from thick clients.  In thick clients you have to tell it exactly what
to do, in HTML you describe what you want it to do and it will handle
the layout and such real time.  So I guess for more targeted help
please describe what the purpose of the majority of your images are
and why you believe you need to generate them real time on the server.

On Sep 9, 9:13 am, pete bobobo...@hotmail.com wrote:
 Hmm, I guess I was stupid, I should just use a service to dynamically
 create images of the right size on the server-side and flush them to
 the client, then I have variable resizing and can use 100% size in the
 browser, right? (sorry, I'm not too experienced in programming web-
 apps)

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Re: Translating already compiled Java?

I have been battling this issue for a while and the solution really
depends on your architecture.  The question is are they truly POJOs or
do they have JAXB annotations?  If they have JAXB annotations GWT will
blow up, if not you can trick the GWT compiler into letting you use an
external library, but you will also need a jar with the source in the
classpath of the GWT compile too.  Lets assume the following package
structure:

POJOs: // you will need your ejb jar and a jar that contains the
source, but the source is only needed for the ejb compilation(you
might even be able to get away with just pointing to the src dir in
the classpath of the compile)
com.example.ejb.entity

GWT:
com.example.gwt
 EntryPointModule.gwt.xml // include
com.example.ejb.PojoResourceModule
com.example.ejb
 PojoResourceModule.gwt.xml // add this file
to allow you to include the pojos as a module, this should have
sourceentity/source

On Sep 8, 3:56 am, Gary Madden garymad...@gmail.com wrote:
 Hello,

 Sorry if this is a silly question but I was wondering whether it's
 possible to get the GWT compiler to translate already compiled Java
 code into JavaScript? I know that you can specify Java source code to
 translate using the source elements in the XML module file. The
 reason is, I have a JAR that is generated from a WSDL. My GWT web app
 makes SOAP requests using this JAR. There is a problem in that I have
 to write a lot of classes at the moment that basically replicate the
 POJOs in the JAR just so they can be used in GWT. This may lead to
 bugs where not all the fields are properly set from the SOAP objects.
 In fact, I've already found and fixed quite a few bugs relating to
 this.

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Re: How to get HTTP Response headers?

Works fine for me:

@Override
public void onResponseReceived(Request request, Response
response)
{
String toPop = ;
for (Header header:response.getHeaders())
toPop += header.getName() + :  +
header.getValue() + \n;
Window.alert(toPop);
}

pops up:

X-Powered-By: Servlet/3.0
Server: GlassFish Server Open Source Edition 3.0.1
Content-Type: application/json
Transfer-Encoding: chunked
Date: Thu, 09 Sep 2010 23:46:05 GMT

On Sep 9, 5:07 pm, ussuri michael.glas...@gmail.com wrote:
 Does the silence mean this is impossible? Or just very difficult?

 MG

 On Sep 8, 8:45 pm, ussuri michael.glas...@gmail.com wrote:

  Hello!

  I can't figure out how I can get HTTP Response header. In
  com.google.gwt.http.client.RequestCallback.onResponseReceived() method
  (a callback from RequestBuilder) there is a Response parameter that
  has getHeder() and getHeaders() methods, but these always return empty
  strings or nulls.

  FireBug shows that the headers are there, but I can't get them in
  GWT...

  THanks,
  MG

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Re: Adding Event Handlers on the body element...

Similarly you should probably also check the type. and you could
emulate the normal handler style of the rest of the GWT architecture.

Event.addNativePreviewHandler(new NativePreviewHandler()
{
@Override
public void onPreviewNativeEvent(NativePreviewEvent event)
{
NativeEvent ne = event.getNativeEvent();
if
(KeyDownEvent.getType().getName().equals(ne.getType()))
System.out.println(Yipeee!);
}
});

On Sep 9, 5:11 pm, Carlos Aguayo carlos.agu...@gmail.com wrote:
 You can try something like this:

     Event.addNativePreviewHandler(new NativePreviewHandler() {
       @Override
       public void onPreviewNativeEvent(NativePreviewEvent event) {
         int KEY_F8 = 119;
         if (keyup.equals(event.getNativeEvent().getType()) 
 event.getNativeEvent().getKeyCode() == KEY_F8) {
           // do something onkeyup  f8
         }
       }
     });

 On Aug 6, 8:45 pm, seth.ho...@gmail.com seth.ho...@gmail.com
 wrote:

  Hello,

  I'm using GWT for 2 years now and i did many great things with it.
  However, i'm still looking for how to implements KeyboardHandlers on
  the BodyElement.
  The only way i found is writing something like this in the HTML file :

    bodyonkeypress=return keyPress(event); 
  onkeydown=returnkeyDown(event); onkeyup=return keyUp(event);

  And something like that in the EntryPoint

  public void onModuleLoad() {
          // publish();}

  private native final void publish() /*-{
          $wnd[keyPress] = function(event) {
                  
  @webapp.client.Application::keyPress(Lcom/google/gwt/dom/client/
  NativeEvent;)(event);
          }
          $wnd[keyUp] = function(event) {
                  
  @webapp.client.Application::keyUp(Lcom/google/gwt/dom/client/
  NativeEvent;)(event);
          }
          $wnd[keyDown] = function(event) {
                  
  @webapp.client.Application::keyDown(Lcom/google/gwt/dom/client/
  NativeEvent;)(event);
          }

  }-*/;

  But i'm really not satisfied with that solution.
  Any ideas please ?

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Re: Variable UI

What you are describing is very similar to worldofsolitaire.com.  I
suggest that you play around with it for a bit and use firebug to
inspect how he does things in html.  I believe he is using just one
image for each card and letting the browser scale it.  This way you
only need one image for each card and you just let the browser handle
the sizing.  He is also doing some stuff that I have had difficulty
getting to work in the past, but is a necessity with such an
application.  You need to be able to sense both when the browser
resizes(easy) or when the layout is changed on the screen(more
difficult as this requires you to set up your own eventing for
whenever the size of anything changes and therefore becomes very
heavy).  I do however believe you will be able to get away with just
one set of cards letting the browser resize it for you.  Like I said
in order to do so you will need to use the img tag, therefore
ImageBundle is not a good solution because it creates an image with
the background therefore not allowing for client side resizing.
Firebug is your friend with GWT development, so if you aren't sure
what the Java code is producing inspect it with firebug and make sure
it's what you want.

On Sep 9, 5:46 pm, pete bobobo...@hotmail.com wrote:
 This one app is a card game, with approx. some hundred cards when
 fully designed. So each card has a small image shown in the UI
 (dragable, if possible 2 rows a 5 small cards independent of the
 resolution) and on click shows a popup with the full image including
 card description. Furthermore 5 small views of stacks to the left on
 top of each other, which mainly consist of smaller versions of the
 same cards. The popups from the small stacks are the same images in
 different sizes once again...

 I created widgets for this card type, to take care of presenting the
 small image with possibility to display the full one, etc. Furthermore
 options to automatically scale the card to a certain height (by using
 the setHeight() , setWidth() methods). It all works, once the browser
 was refreshed. I also dynamically create the playfield, left an area
 for card stacks, right side a play field with drag and drop support.
 But even the play area is not proportioned correctly until refresh...
 (I set 1/5 percentage of Window.getClientWidth() for the card stack
 area)

 The caching of the images is right now to present each card image once
 on the screen, cause I only know that way to cache the images in the
 browser (since ImageBundle doesn't work for my case I guess...). So I
 have a timer running switching through every possible card with a
 certain speed low enough to show the cards on screen...

 So this all together is everything but satisfying... For the cards I
 either need different resolutions on the server, so I can adjust to
 the client window size, or I have to create them dynamically...
 I want this to run on the GAE for now, so the more work the client
 does, the better, right? (With respect to quotas)

 Anyway, I really appreciate your help :-) You're quite right that I
 don't have much experience in web development ;-)

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Re: DisclosurePanel, class-name content

2010-09-08 Thread lineman78

Then the problem isn't with GWT; it is with the site you are
integrating with not having a convention.  I do agree that it would be
nice to be able to change this and if it bugs you that much you can,
it's just not as easy as it could be.  They have a private static
string with the style name within disclosure panel, but you can't
change it as easy because everything is private, instead you will have
to remove the name after it is added and add your own by overriding
the setContent method

On Sep 7, 11:36 pm, Jaroslav Záruba jaroslav.zar...@gmail.com wrote:
 On Wed, Sep 8, 2010 at 2:43 AM, lineman78 linema...@gmail.com wrote:
  It is because content and header all both children of the gwt-
  DisclosurePanel class and they expect you to use child selectors.
  Here is what they expect you use so that you don't end up with
  collisions:

  .gwt-DisclosurePanel .content {
   border: 2px solid black;
  }

 In other words, this ^^^ does not address the issue.

 Regards
   J. Záruba

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Re: Variable UI

2010-09-08 Thread lineman78

Remember, most UI is in html, so use width=100% whenever possible.
Also, you can use the layout panels so that you theoretically don't
have to deal with browser quirks such as IE's box model bug.  A
refreshing layout such as the one you discussed is a very heavy handed
layout model and should be avoided at all costs and can cause major
performance problems, this is one of the main drawbacks to GXT and
SmartGWT IMO.

On Sep 8, 10:17 am, pete bobobo...@hotmail.com wrote:
 Hello,

 I'm a little confused, I tried to create a variable UI, meaning
 titlebar with shall be adjusted to the browser window size, and
 various graphics to be scaled, fitting any resolution. (I use stuff
 like Window.getClientWidth() and image.setWidth(int))
 But now, when I first open the page, it is strangely dislocated, in a
 wrong size or some graphics not loaded at all. If I press refresh and
 load the module again, everything is fine.
 Does anyone know the reason for that? Principally I could include an
 auto refresh just at the beginning, but a) that is not really a nice
 solution and b) if I have various stations in my app where such a
 variable adjustment happens, I have to refresh several times (if a new
 variable widget is loaded after the first one, it needs refresh again,
 then the second time everything with that widget is fine, too)
 Hope anyone can shed some light on that, cause I'm really confused why
 it just doesn't work right away but after a refresh...

 Thanks in advance :-)

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Re: DisclosurePanel, class-name content

2010-09-08 Thread lineman78

I agree with you that the reason for the prefixing is to prevent
collisions, but agree(assuming the following was the the GWT team's
reasoning) that only the parent element in a widget should have the
prefix and not the sub elements.  If you wanted to add a prefix to
every class name in your UI, the further down in the DOM you go the
bigger the class names would be.  This was the reason behind the
creation of CSS selectors.  I will use a tab panel as an example.
Assume I want to change the width of the upper left hand corner of a
rounded tab on a specific class of tab panel.

gwt-DecoratedTabPanel  header  tab  upperLeft {}

vs

gwt-DecoratedTabPanel  gwt-DecoratedTabPanel-Header  gwt-
DecoratedTabPanel-Header-Tab  gwt-DecoratedTabPanel-Header-Tab-
UpperLeft

Yes this is more inconvenient for people integrating into other sites
that do not have prefixes, but I find it pretty hypocritical that you
would expect GWT to avoid collisions with classes that are blatantly
defined without the same consideration.  I also do see your point that
within GWT they do tend to add the prefixes to most class names, so it
is interesting that they would choose to omit it here.  Also, you have
to take into account a balance in selectors and the expense of
ancestor selectors.  At IO there was a talk on efficiency for the past
couple years and one of the points was the way browsers handle
ancestor selectors and how it will cause slow down if you use a common
name as your root(upperLeft in the context above).  It will walk the
entire DOM tree every time it sees an element with the class
upperLeft.  So it is a balance and content is such a common one that
I may concede due to performance degradation.

On Sep 8, 3:09 pm, Jaroslav Záruba jaroslav.zar...@gmail.com wrote:
 Just to be clear, I don't need advices on workaround. I honestly believe
 this is just an omission. (The other option wold be 'blatant example of bad
 design', but we're not talking MSIE here.)
 The reason behind prefixing class-names used in GWT is, IMO, very obvious -
 to prevent exactly this kind of collisions.
 When virtually all the class-names used in GWT are name-safe to me it
 feels wrong to be forced to fix one nested class-name before releasing a
 GWT-component to the world. (Even the class-name for open DisclosurePanel is
 strongly prefixed: gwt-DisclosurePanel-open.)
 Adding something like fix your class-names before you use this to your
 release notes is IMO a big 'no go'. Some people might want to use your
 component on a website that runs on something they did not write.

 Well, if you can't see it, I won't probably change your mind. So thanks for
 the discussion.

 Cheers
   JZ

 On Wed, Sep 8, 2010 at 8:03 PM, lineman78 linema...@gmail.com wrote:
  Then the problem isn't with GWT; it is with the site you are
  integrating with not having a convention.  I do agree that it would be
  nice to be able to change this and if it bugs you that much you can,
  it's just not as easy as it could be.  They have a private static
  string with the style name within disclosure panel, but you can't
  change it as easy because everything is private, instead you will have
  to remove the name after it is added and add your own by overriding
  the setContent method

  On Sep 7, 11:36 pm, Jaroslav Záruba jaroslav.zar...@gmail.com wrote:
   On Wed, Sep 8, 2010 at 2:43 AM, lineman78 linema...@gmail.com wrote:
It is because content and header all both children of the gwt-
DisclosurePanel class and they expect you to use child selectors.
Here is what they expect you use so that you don't end up with
collisions:

.gwt-DisclosurePanel .content {
 border: 2px solid black;
}

   In other words, this ^^^ does not address the issue.

   Regards
     J. Záruba

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Re: Cross Site Requests for JSON : Invalid Label

2010-09-07 Thread lineman78

In other words you are using JSONP client code to hit a JSON service.
Without more info I am assuming this is your problem.  In order to
make cross site requests using the method described on the page you
referenced you service needs to output JSONP, that is wrapping the
JSON with a call to the specified function; i.e. /test?
callback=testFunction would return
testFunction({testAttribute:testStringValue}).  Also, since 2.0
the JsonpRequestBuilder class is provided and you don't have to go
through as much trouble as you did in 1.6, which is what the referred
article is targeting.

http://google-web-toolkit.googlecode.com/svn/javadoc/2.0/com/google/gwt/jsonp/client/JsonpRequestBuilder.html

 I had a search for solutions and all I could find was things about
 adding parenthesis around the json string in the eval function.

 I do not use the eval function and the json is not a string - it is a
 JavaScriptObject.

This is true if you would like to use JSON directly if you are not
making a cross-site request.  you will sometimes need to wrap the JSON
returned by the service with {+jaonText+} if you use request
builder, which will return a string then you will have to make a
native method to call eval to translate that string into a javascript
object, but if you are making a cross-site request then you must use
the JsonpRequestBuilder.

On Sep 7, 7:31 am, kudos miss.michelle.dor...@googlemail.com wrote:
 I have followed the steps 
 here:http://code.google.com/webtoolkit/doc/1.6/tutorial/Xsite.html
 to create a call to another server for JSON data.

 Firebug shows an invalid label error when i run the application.

 I had a search for solutions and all I could find was things about
 adding parenthesis around the json string in the eval function.

 I do not use the eval function and the json is not a string - it is a
 JavaScriptObject.

 Has anyone else found a solution to this?

 Thanks

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Re: How to block click event?

2010-09-07 Thread lineman78

you can try adding different handlers such as a click handler or mouse
down handler and call event.preventDefault().

On Sep 6, 9:06 am, ulgerang ulger...@gmail.com wrote:
 Hi,

 I am making 'ImageButton' that extends 'Image' and implemented
 'HasEnabled' interface.
 I made 3 state, disable,mouseover, enable.
 When I was making disable,  I have to block the click event  from the
 widget.
 but  I couldn't find the way.

 Is there any way to block the click event?

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Re: DisclosurePanel, class-name content

2010-09-07 Thread lineman78

It is because content and header all both children of the gwt-
DisclosurePanel class and they expect you to use child selectors.
Here is what they expect you use so that you don't end up with
collisions:

.gwt-DisclosurePanel .content {
  border: 2px solid black;
}

On Sep 5, 11:08 am, Jaroslav Záruba jaroslav.zar...@gmail.com wrote:
 Hello

 There is one quite unfortunate class-name in the DisclosurePanel DOM. The
 widget serving for content gets class-name content assigned. Such generic
 name is very collision prone, which situation I'm currently facing.
 Is there any special reason why this element did not get gwt-prefixed
 class-name as the rest has?

 Regards
   J. Záruba

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Re: Using GWT for a large UI project

2010-09-02 Thread lineman78

I completely agree with marius on the plugin requirement for
silverlight.  Also, until M$ decides to make a full version of
Silverlight available on Linux it will never become popular.  Since
the majority of the people that use Linux are software devs, it would
make sense that you would want to support it to gain acceptance with
devs.  Those who argue that Moonlight is an acceptable alternative and
M$ is giving Novell full support I challenge you to try to use the
most popular feature of Silverlight; DRM streaming, which M$ refuses
to license for x86 because they are afraid their architecture isn't
good enough to withstand a barrage of Linux devs.  Also, I don't see
what silverlight and business customers have to do with each other
other than the corporate insistence of paying for M$ products.  Also,
it has been well documented that with GWT you can architect your
software in such a way that you can output an optimized display for
mobile clients.

On Sep 2, 12:24 am, Maxim maxim...@gmail.com wrote:
 Marius

 you wrote: but one of our goals is to use plain browser functionality,

 available on all devices.

 Recently I changed my mind a little bit in connection to that - this
 goal is more technical than commercial. Users want certain
 functionality, if functionality demands plugin - they will install
 plugin. E.g. ref Flash technology. Silverlight gives huge amount to
 business customers ( at least to their certain category).

 Next - this goal is not mentioned in your document :) Also note - if
 you try complex GWT application on your phone you will be likely
 disappointed, so available on all devices still is not 100% reality.

 But of course if you must traget *nix users, then Silverlight is not
 your choice. Just mention that in goals :)

 Maxim

 On Sep 1, 8:57 pm, marius.andreiana marius.andrei...@gmail.com
 wrote:

  Thanks Maxim (saw your email),

 http://demos.telerik.com/silverlight/salesdashboard/saysMissing
  plugin. So I left ;)
  I'm sure silverlight can have great results for controlled end user
  environments, but one of our goals is to use plain browser
  functionality, available on all devices.

  On Sep 1, 4:40 pm, Maxim maxim...@gmail.com wrote:

   Marius,

   in your document you compare GWT wih ASP.NET AJAX but I think it
   should be rather compared with Silverlight, this is a client-side
   technology like GWT which is not linked to server. ASP.NET AJAX is
   something very different and demands IIS to be installed server-side.

   My story about this comparison. We are having good customer we were
   trying to develop forusingGWT. Actually skeleton was developedusing
   GWT but then he wanted more modern appearance, and he could pay money
   for commercial libs. We figured out that commercial libraries for
   Silverlight are light years ahead of what GWT 3rd party libraries can
   offer. Price for such libraries are relatively low ( say in comparison
   to developer monthly salary), so cost is not a big problem I think.

   e.g.http://demos.telerik.com/silverlight/salesdashboard/

   Still we love GWT and use it heavily for 
   sayhttp://www.projectkaiser.com:8080/

   One more thing: from time to time we have browser-compatibilty-related
   issues ( not so big though )  with GWT, especially in Firefox.

   Maxim

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Re: Problems creating my first reusable module: import cannot be resolved

2010-08-19 Thread lineman78

feel free to shoot me a zip of the project and I will tell you whats
wrong.

On Aug 18, 11:44 am, Sleeveen pstron...@gmail.com wrote:
 I've dropped the JAR in war/WEB-INF/lib since it will (eventually) be
 used on the server side of things.

 I've removed the hyphens from the name of the module (everywhere):
 still no luck.

 I've removed the rename-to attribute: still no luck.

 I am indeed using Eclipse. The JAR is configured as a library on my
 Java build path.

 I appreciate the comments though!

 Keep 'em coming!

 Thanks

 On Aug 18, 12:58 pm, lineman78 linema...@gmail.com wrote:



  From what I can tell there is nothing wrong with the structure of your
  project or the packaging.  Generics have been supported since GWT
  1.5.

  First of all, you dont want it to be in war/WEB-INF/lib.  This is for
  server-side Java libraries, but this won't hurt anything.

  Second, I would try taking the hyphen out of the module name as that
  may be causing issues.

  Thirdly, you might think about removing the rename-to from the library
  gwt.xml.

  I would also double check your classpath to ensure that the jar is in
  it.  How are you compiling? Eclipse?

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Re: Problems creating my first reusable module: import cannot be resolved

2010-08-18 Thread lineman78

From what I can tell there is nothing wrong with the structure of your
project or the packaging.  Generics have been supported since GWT
1.5.

First of all, you dont want it to be in war/WEB-INF/lib.  This is for
server-side Java libraries, but this won't hurt anything.

Second, I would try taking the hyphen out of the module name as that
may be causing issues.

Thirdly, you might think about removing the rename-to from the library
gwt.xml.

I would also double check your classpath to ensure that the jar is in
it.  How are you compiling? Eclipse?

On Aug 17, 3:12 pm, Sleeveen pstron...@gmail.com wrote:
 I'm in the process of trying to create my first reusable module in
 GWT. For
 now, this module contains only some simple classes to be used as part
 of a
 GWT RPC implementation. The module DOES NOT have an entry-point, just
 source
 path specifications.

 This code would normally go into the shared subfolder of a standard
 GWT project;
 I just want to be able to reuse these classes. I'm fairly certain that
 I have
 complied with the GWT RPC serializability rules (although I do use
 Java generics,
 which shouldn't be a problem - right?).

 My source structure for the module is similar to:

 src
     org
         base
             subpackage1
                 A.java
                 B.java
                 C.java
             subpackage2
                 generated
                     X.java
                     Y.java
                     Z.java
             my-module.gwt.xml

 The my-module.gwt.xml file looks like:

     ?xml version=1.0 encoding=UTF-8?
     module rename-to='my-module'

       source path='subpackage1'/
       source path='subpackage2'/

     /module

 I have created a my-module.jar file that is structured as follows:

 META-INF
 org
     base
         subpackage1
             A.java
             A.class
             B.java
             B.class
             C.java
             C.class
         subpackage2
                 generated
                     X.java
                     X.class
                     Y.java
                     Y.class
                     Z.java
                     Z.class
         my-module.gwt.xml

 In the module where I'm attempting to use the X class:
     - I've added my-module.jar to war/WEB-INF/lib
     - I've added   inherits name=org.base.my-module/ to
 my .gwt.xml file
     - I've adde my-module.jar to the java build path libraries

 In the class where I'm attempting to use the X class I have:

     import org.base.subpackage2.generated.X;

 And the GWT compiler is indicating that:

     The import org.base cannot be resolved.

 This is probably something really obvious (for the non-noobs ;-)

 Any assistance would be appreciated.

 Cheers!

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Re: Generate Random String

In Java you could also use the UUID class, but doubt its ported into
GWT.  Also, simply using the long value of time is also effective
assuming that there is no chance of ever generating 2 at the exact
same time(i.e. result of a user action): Long.toString(new
Date().getTime());

On Aug 17, 7:35 am, spierce7 spier...@gmail.com wrote:
 AH! I didn't think to search just java! Stupid me. Thanks so much.

 On Aug 17, 12:49 am, Jim Douglas jdoug...@basis.com wrote:

  I did this google search:

 http://www.google.com/search?q=java+generate+random+alphanumeric+string

  That returns more suggestions that you could possibly need; take your
  pick.  The first link returned from that search has several
  suggestions:

 http://stackoverflow.com/questions/41107/how-to-generate-a-random-alp...

  On Aug 16, 9:05 pm, spierce7 spier...@gmail.com wrote:

   What would be the best way to generate a random string in GWT with no
   slashes (/ or \), preferably just capitol letters and numbers. How
   would I do this? I'm surprised I can't turn up any information in
   searches. I'm looking to do this Server Side, meaning in java, rather
   than javascript. Thanks!

   ~Scott

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Re: HTML in TextArea

You might have to do some DOM tricks to lock RichTextArea, but it
should be possible. Such as adding a focus listener and canceling the
event or finding the inner text area object and disabling it.

On Aug 17, 5:13 am, steenstrup kasper.steenst...@gmail.com wrote:
 My problem, is that i like to display html in a textArea that can get
 lock, so it can't be edit.

 TextArea have the ability to be lock, but can't handel html
 RichTextArea can't lock, but can handel html

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Re: why we probably won't use GWT for a large UI project

Frank,
First of all, this thread seems to have 2 different topics and I have
not said anything about Vaadin as I have no experience with it and
that seems to be what Joonas is referring to. Second of all, my
problem is that you call them GWT enterprise architects. When you
break it down it is Java EE with a Javascript client and people think
GWT is going to provide an end-to-end solution. GWT dead code
elimination is an important capability which Ray Cromwell has
emphasized with GWTQuery in some of his old Google I/O talks and I
only point it out because I see it as the leading disadvantage to
SmartGWT in particular. I am a Java EE developer who advocates GWT as
the client framework. So as far as a SOA goes, yes I believe I know
more than the average GWT developer. The problem is that too many
people on this group think of GWT as only a complete framework as is
the result of the GAE integration, but when it comes down to it all
GWT provides is a JS cross-compiler for the client with a custom
communications protocol built on REST. You need to realize that not
everyone uses GAE and some of us must provide interfaces or integrate
with other technologies. The problem that Marius has run into is that
he is writing a client to integrate with a .net REST server, therefore
the arguments about GWT-RPC were moot, which is all I was trying to
point out as far as why people might choose REST over GWT-RPC as I
often have to expose my services to .net clients. And if you disagree
with me with my statements that overlay types is the fastest and most
efficient way to deal with a JSON REST service or that GWT as it is
right now is not a full UI library, but is heading that way let's here
some arguments against it. It doesn't help with discussion by just
coming in and saying you guys are stupid and everything said here is
wrong, tell us what you think is wrong and why so we can have a
healthy discussion about it.

On Aug 16, 11:40 am, Frank Argueta frank.argu...@gmail.com wrote:
Joonas,
This thread cannot be taken seriously and has some terrible advise. It's
like the blind leading the blind. Stefan and lineman78 in particular. I miss
the days that Rienier would lash out when people spread misinformation or
gave incorrect advise on this group. Alteast it kept the quality of the
responses high but right now this forum is running wild and everyone who has
read about GWT dead code elimination thinks they are GWT enterprise
architects.

-Frank

On Mon, Aug 16, 2010 at 10:23 AM, Joonas lehti...@gmail.com wrote:
Please do not judge by the Calc example - it is just a minimalistic
Hello World type example for quickly showing how events are managed
in Vaadin. Of course one should do such a trivial application (with no
server-side needed at all and just a few lines of business logic) in
just JavaScript - there is no need for any frameworks at all.

For a more sophisticated analysis on communications, please read

http://philipp-baerfuss-magnolia.blogspot.com/2010/08/why-vaadin-line...
In this article Magnolia team has estimated that real world
application can expect comparable number of ajax roundtrips both in
GWT as in Vaadin. (Most of the data have to go back to server in any
case).

On Aug 15, 8:26 pm, Stefan Bachert stefanbach...@yahoo.de wrote:
Hi,

I would avoid vaadin. Agreed that vaadin looks good out of the box,
vaadin falls back into the poor old fat-client architecture.
GWT supports a real responsive client-server architecture but vaadin
uses GWT like a display server.

You can test the difference using the samplehttp://demo.vaadin.com/Calc

Click a number and it tooks 300ms until the calc will display it.
This latency is a direct consequence of choosing the poor old
architecture.

Stefan Bacherthttp://gwtworld.de

On 10 Aug., 09:02, Nathan Wells nwwe...@gmail.com wrote:

I would look into vaadin. We just looked at it recently, and I think
it's a good alternative to straight GWT, but we can't switch because
it's a pretty significant change.

On Aug 10, 5:23 am, Shawn Brown big.coffee.lo...@gmail.com wrote:

I'm looking to get this group's feedback before I present my
findings
to the team. What do you think?

If open source is nice then go for gpl and ExtGWT (GXT). If you
don't
pay the commercial fee, then you have to open source your project I
believe.

Shawn

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Re: How to send data back to client side code?

Yeah, I ran into this issue a year ago when I was working with GAE +
GWT-RPC.  The client side object cannot have references to any code
not associated with a GWT module, so there are a few options for you
here.

1) create a translator and maintain 2 versions of the class; 1 for the
client(without annotations) and 1 for the server(with annotations)
2) use Java serialization to make a deep copy with 2 versions of the
class like specified above (serializeable uuids must be equal).
3) write a utility that uses reflection to translate between the
objects above
4) use some sort of 3rd party library that allows for persistence and
serialization.

There are more options that I haven't listed here, but these are a few
to start.

On Aug 17, 12:55 pm, Jeff Schnitzer j...@infohazard.org wrote:
 This is a major PITA with GAE+JPA.  You'll likely also need to detach
 your entities from the JPA session, which AFAIK is impossible with the
 JPA interface - only with the JDO interface.

 My advice is throw out JPA and use Objectify.  You can use your
 entities in GWT as-is (assuming they are client-safe), even if they
 reference Key or GeoPt or other datastore classes.  Objectify provides
 GWT emulation for all those classes:

 http://code.google.com/p/objectify-appengine/wiki/ObjectifyWithGWT

 (I'm the lead developer of Objectify, and I use it with GWT in my
 applications every day)

 http://code.google.com/p/objectify-appengine/

 Jeff

 On Sat, Aug 14, 2010 at 2:26 AM, cokol eplisc...@googlemail.com wrote:
  again - you shall not have any references inside your translatable
  classes to classes from 3rd party! translatable classes are those to
  be compiled to javascript and which reside in client and shared
  packages. 3rd party classes are those where you dont have sourcecode
  from.

  consider your Employee just to be a bean or container without any
  logic just with a purpose to carry payload data. so design the class
  NOT to use any classes from appengine like Key, BlobKey etc

  On 14 Aug., 07:05, Sree ... gattasrika...@gmail.com wrote:
  Modified the Employee.java as below

  *public class Employee implements IsSerializable{*

  then moved the Employee.java to shared package. [eclipse updated all
  references well]
  Now when I GWT to compile its saying

  Compiling module project.xxx
     Validating newly compiled units
        [ERROR] Errors in 'file:/C:/xxx/src/xxx/shared/Employee.java'
           [ERROR] Line 10: The import com.google.appengine cannot be 
  resolved
           [ERROR] Line 11: The import com.google.appengine cannot be 
  resolved
           [ERROR] Line 19: Key cannot be resolved to a type
           [ERROR] Line 101: BlobKey cannot be resolved to a type
           [ERROR] Line 141: Key cannot be resolved to a type
           [ERROR] Line 189: Key cannot be resolved to a type
           [ERROR] Line 190: Key cannot be resolved to a type
           [ERROR] Line 305: Key cannot be resolved to a type
           [ERROR] Line 306: Key cannot be resolved to a type
           [ERROR] Line 424: BlobKey cannot be resolved to a type
           [ERROR] Line 425: BlobKey cannot be resolved to a type
           [ERROR] Line 431: BlobKey cannot be resolved to a type
           [ERROR] Line 432: BlobKey cannot be resolved to a type
     Finding entry point classes
        [ERROR] Unable to find type 'xxx.client.Example'
           [ERROR] Hint: Previous compiler errors may have made this type
  unavailable
           [ERROR] Hint: Check the inheritance chain from your module; it may
  not be inheriting a required module or a module may not be adding its 
  source
  path entries properly
  Picked up JAVA_TOOL_OPTIONS: -agentlib:jvmhook

  Why appengine import statements are not working! Again they should be only
  in server folder?

  On Sat, Aug 14, 2010 at 6:17 AM, Sree ... gattasrika...@gmail.com wrote:
   okey... thanks alot guys
   i ll try to make those changes and will update here

   also thx for so quick responses.. am loving it

   On Sat, Aug 14, 2010 at 2:31 AM, cokol eplisc...@googlemail.com wrote:

   hi the problem is that gwt does not have source of your Employee
   class, since you have put it into the server package, you always have
   3 packages to handle (as per default):

   client
   server
   shared

   everything under client becomes javascript after compilation and is
   not aware of anything contained in server package, everything
   contained in server package is intended to run in java VM and remains
   java, here you may have references to classes used in client package
   if you like, this would not break up gwt. the shared package contains
   everything what is required for client and server package, like the
   service interfaces AND transfer objects  payload classes like your
   Employee. furthermore everything whats inside client and shared
   package has to be translatable to javascript, i.e. you shall not use
   3rd party libraries in there.

   so just move the

Re: Expose URL as REST service how?

2010-08-16 Thread lineman78

Restlet seems to be the one supporting GAE best right now.  Jersey may
be working now, but I know they were running to security issues for a
while.

On Aug 16, 2:38 am, Harald Pehl harald.p...@googlemail.com wrote:
 Hi,

 the Restlet guys have written a little tutorial which might be
 helpful:http://wiki.restlet.org/docs_2.0/13-restlet/21-restlet/318-restlet/30...

 - Harald

 On 13 Aug., 20:05, Thamizharasu S zaru...@gmail.com wrote:

  Hi,

  Thanks for the quick answer. I want to deply my GWT app in GAE. is
  there any document for reference or could you help me on this to
  achieve?

  - Thamizharasu S

  On Aug 13, 10:51 pm, lineman78 linema...@gmail.com wrote:

   REST is provided by most app servers in the form of a reference
   implementation of JSR-311.  Glassfish uses Jersey, JBoss RESTEasy.
   Most app servers bundle support in one way or another now.  Some GWT
   people have found RESTlet easy to use also.  The Jersey users manual
   is very in-depth and ought to get you going, but the deployment
   descriptor will change depending on implementation.

  https://jersey.dev.java.net/nonav/documentation/latest/user-guide.html

   On Aug 13, 11:38 am, Thamizharasu S zaru...@gmail.com wrote:

Hi All,
I am evaluating GWT for my new project which is going to be started
shortly. I have a requirement with REST support.

For example, I have a list of users. If I click on any one the user,
the details of the user will be shown in a different view.

I need to expose this URL,http://sample.com/user/123asaREST
service.

If anyone try to access this URL directly, the particular user details
should be shown.

I don't know how to achieve this using GWT. I am using RPC service to
fetch the details of the user from the server.

Can any one help me on this?

- Thamizharasu S

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Re: why we probably won't use GWT for a large UI project

2010-08-15 Thread lineman78

Stefan, while I agree that GWT-RPC inherently gives some XSRF
protection, I don't think it should be relied upon.  First of all, any
service that performs an action in a REST architecture should use a
method other than GET, such as POST, PUT or DELETE; therefore the
argument of GWT-RPC running over POST is a moot point because the only
thing available over GET will be data retrieval, which should still be
concerning, but still satisfies your argument.  Also, the safari
problem of only supporting GET and POST was only present in Safari 1.x
and there has been discussion within the GWT contributors to open up
the constructor for RequestBuilder to all methods because less that 1%
of users would be effected.

Secondly, security by obscurity is a poor and irresponsible design
decision and should not be considered at all.  Lastly, almost all Java
app servers provide container managed security and this should fit the
needs in 95% of all apps, so why develop your own?  Just add
annotations to your web.xml that sets security restrictions on certain
URL paths for users in certain rules.  When it gets too complex for
that there is also a RolesAllowed annotation and you can inject the
security context to gain access to the users roles and principal.  I
understand that the majority of GWT developers aren't J2EE devs, but
so often people talk about GWT as if it was some sort of standalone
product when it was designed to be modular and take advantage of an
already mature Java enterprise environment.  Container managed
security can also be used for GWT-RPC; try it sometime you'll love it;
although getting form login to work with GWT can sometimes take a
little trickery as most app servers are based off of Tomcat and Tomcat
treats the forwarding for form login differently depending on if you
are using SSL or not(redirect vs request dispatch).  I recommend just
starting with basic authentication till you are comfortable enough to
try getting form to work, it is simple but can cause problems with
GWT.  It sounds like Marius might not be running on a Java server, so
this might not apply and a custom security solution may be necessary,
but he seems to have this worked out already.

I completely agree with you that opening the allow origin up is a very
poor decision as far as security goes and if you absolutely must make
cross-site requests a proxy servlet is the best option assuming JSONP
can't be supported.

One last point... Even though GWT-RPC has some small advantages over
REST because it is based on REST, it is by far not the best solution
for large projects.  The main purpose of using REST is that it is
platform independent as far as the client goes.  With GWT-RPC only GWT
can be used, but with REST anything can consume it, especially when
you expose several different output media types like I do.  For my
services a client can request that I send the response back in 4
different forms: XML, JSON, JSONP and Java Serialization.  This is
very important because possible consumers of our services include
Java, JS, C++ and C# clients.  We could argue all day on which
implementation is better and it truly comes down to the fact that it
depends on the requirements of the project.  For work projects I tend
to use REST; for personal I use GWT-RPC because I know the client will
always be GWT.

On Aug 14, 4:01 am, Stefan Bachert stefanbach...@yahoo.de wrote:
 Hi marius,

 I have to admit that my statement was to hard.
 Webservice are intended to be accessed from different distributed,
 scattered site.
 I am still not sure whether this the case in your project.

 When you access multiple REST sources, it is unlikely to connect them
 all at login time.
 When you defer a login for some data source you have to save the
 credentials to do so.

 GWT-RPC is more secure because.
 a) GWT-RPC always uses POST. This means a CSRF attack is no more easy
 (but not impossible as any attacks)
 b) GWT-RPC automatically add an header with sends the strong name back
 to the server which will be checked.
 So it takes more effort to attackers to supply this additional header,
 too. (X-GWT-Permutation)

 A problem with REST directly is mentioned in the GWT javadocs.
 webkit based browsers (safari) seams to have a bug when using other
 methods then GET or POST.
 When you can't guaranty that you never use other methods, you could
 not support safari.

 Access-Control-Allow-Origin: *
 I consider this as real bad (independly which protocol you are using).
 You give up SOP and open new attack 
 vectorshttp://code.google.com/p/html5security/wiki/CrossOriginRequestSecurity

 At least use a concrete list of sites which is under your control.

 Stefan Bacherthttp://gwtworld.de

 On 11 Aug., 18:46, marius.andreiana marius.andrei...@gmail.com
 wrote:



  Hi Stefan ,

  I'm not sure I understand your point.

  Say we have api.site.com, with the back-end written in a non-Java
  tech, which offers REST APIs over SSL such as
  POST login
  Body: data username,

Re: Expose URL as REST service how?

2010-08-13 Thread lineman78

REST is provided by most app servers in the form of a reference
implementation of JSR-311.  Glassfish uses Jersey, JBoss RESTEasy.
Most app servers bundle support in one way or another now.  Some GWT
people have found RESTlet easy to use also.  The Jersey users manual
is very in-depth and ought to get you going, but the deployment
descriptor will change depending on implementation.

https://jersey.dev.java.net/nonav/documentation/latest/user-guide.html

On Aug 13, 11:38 am, Thamizharasu S zaru...@gmail.com wrote:
 Hi All,
 I am evaluating GWT for my new project which is going to be started
 shortly. I have a requirement with REST support.

 For example, I have a list of users. If I click on any one the user,
 the details of the user will be shown in a different view.

 I need to expose this URL,http://sample.com/user/123as a REST
 service.

 If anyone try to access this URL directly, the particular user details
 should be shown.

 I don't know how to achieve this using GWT. I am using RPC service to
 fetch the details of the user from the server.

 Can any one help me on this?

 - Thamizharasu S

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Re: Script tag dynamic loading

2010-08-13 Thread lineman78

I have run into this problem with a few scripts that rely on the
document load event, maybe look into manually firing it.  I think I
tried dynamic loading of the maps library before and gave up, but I
didn't try very hard to get it working.

On Aug 13, 5:57 am, Vincent COROLLEUR vcoroll...@gmail.com wrote:
 I tried to load the script on a button event and it's the same...

 Really annoying

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Re: How to send data back to client side code?

2010-08-13 Thread lineman78

Any object referenced in client-side code must be in a client
package.  The new version of the GWT plugin for eclipse added a shared
package suffix, but it is added to the gwt.xml as a client side
package.

On Aug 13, 11:39 am, Sree ... gattasrika...@gmail.com wrote:
 Am not sure this belongs to GWT or GAE or both ...

 So here's my problem...

 I have one client/Example.java [contains all GWT code] calls a methods on
 server/SomeServiceImpl.java [Contains code to talk to dataStore]

 Wat server/SomeServiceImpl.java does is Featch data from Employee.Java
   [this is class used to store data in datastore JPA]

 So now my problem is.. as long as I send data in the form of String or
 StringArray to client/Example.java am fine, but now I tried to send
 ListEmployee to client/Example.java

 Doing so throws me an error as below..

 Validating newly compiled units
       [ERROR] Errors in
 'file:/C:/XXX/XXX/src/xxx/client/GreetingServiceAsync.java'
          [ERROR] Line 18: No source code is available for type
 xxx.server.Employee; did you forget to inherit a required module?
       [ERROR] Errors in 'file:/C:/XXX/XXX/src/client/Example.java'
          [ERROR] Line 325: No source code is available for type
 xxx.server.Employee; did you forget to inherit a required module?
       [ERROR] Errors in 'file:/C:/XXX/XXX/src/client/GreetingService.java'
          [ERROR] Line 19: No source code is available for type
 xxx.server.Employee; did you forget to inherit a required module?
    Finding entry point classes
       [ERROR] Unable to find type 'xxx.client.Example'
          [ERROR] Hint: Previous compiler errors may have made this type
 unavailable
          [ERROR] Hint: Check the inheritance chain from your module; it may
 not be inheriting a required module or a module may not be adding its source
 path entries properly

 --
 -Thanks
 -Srikanth.G
 -Hyderabad

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Re: .gwt-TabBarItem - setting Max width

2010-08-12 Thread lineman78

You will need 3 things:

white-space: nowrap;
overflow: hidden;
max-width: 30px;

However, max-width is not fully supported in IE.  You can fix this in
a couple ways.

1) Use IE's CSS expression.
2) CssResource has some ways of getting values and acting on them, but
I believe this is only run once.
3) (Best Option) Whenever you add or remove a tab or the window is
resized recalculate whether the max-width is exceeded and set the
width to max-width, if not set it to auto.

On Aug 11, 2:14 pm, Bhavik bhavikr...@gmail.com wrote:
 Hi,

 I am trying to set a max width value on the Tab-Bar item but it seems
 that the size of the item is always equivalent to the size of the text
 entered for the barItem.
 I am trying to implement a google chrome style tab panel structure
 where if the number of tab increases the size of each tab is
 readjusted.Is there any option to this.

 .gwt-TabBarItem {
         max-width: 30px;
         margin-right: 3px;
         margin-bottom: 2px;
         padding: 1px 5px;
         background-color: #C6CAB7;
         color: white;
         font-size: 10pt;
         cursor: pointer;

 }

 Thanks,
 Bhavik

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Re: why we probably won't use GWT for a large UI project

2010-08-12 Thread lineman78

I can't help you with the TileGrid other than saying that you could
write something similar yourself with a little effort assuming you are
willing to overlook some of the niceties such as animation.  I have
used SmartGWT in the mast and would warn you to use extreme caution in
making the decision to use it.  It is not a GWT implementation, but a
GWT wrapper around an existing javascript library, so you don't get
all the advantages the GWT compiler gives you such as dead code
elimination and obfuscation.  The SmartClient JS library is modular,
so you can only load the modules you need, but as with any JS library
I would estimate most sites only use 10-20% of the code they download
and load.  Also, SmartClient and ExtJs both use a heavy layout engine,
which I have noticed causes major slowing in IE.

Unfortunately I cannot provide source code, but I can point you to
some resources and explain my approach.  Here is an article by some
GWT contributors on overlay types that should help you get started:

http://code.google.com/p/google-web-toolkit/wiki/OverlayTypes

I am using what they call the old way in that wiki.  To further
expedite things, which you might consider depending on the size of
your project; I have written an overlay type generator.  All I have to
do is write an interface for the overlay type and have the interface
extend JsonObject and it will generate the overlay type for me:

public interface JsonObject {
public void setJso(JavaScriptObject jso);
public JavaScriptObject getJso();
public void setJson(String json);
public String getJson();
}

public interface Shape extends JsonObject {
public void setArea(double area);
public double getArea();
}

GWT.create(Shape.class); produces:

public class ShapeJso implements Shape {
private JavaScriptObject jso;

...

public void setArea(double area)
{
setAreaImpl(jso, area);
}

private native void setAreaImpl(JavaScriptObject jso, double area)
/*-{
jso.area = area;
}-*/;

...
}

This is very simplified, but I have given you a few hints to some of
the tricks I had to use to get the generator method to work(see:
JsonObject).  Usually you would extend JavaScriptObject, but in order
to get the generator to work right I had to save it as an attribute.
You will want to consider if the generator is the right approach, I
think it took me a good 8-10 hours in the end to make a generator that
works for almost every case.  But you can get one that works for most
cases in 2-4 hours as long as you aren't doing anything too complex.

On Aug 11, 3:01 pm, marius.andreiana marius.andrei...@gmail.com
wrote:
 Hey,

 On Aug 11, 11:00 pm, lineman78 linema...@gmail.com wrote: As far as 
 SmartGWT goes, I will warn you that I think the problems and
  performance hits you will run into are not worth the UI that you
  gain.  

 Thanks for the heads up. A hello world with data bound widgets seemed
 straightforward.

  Plus you must consider the licensing, which is required in
  order to use their data binding.

 Looks like we can use 
 thishttp://www.smartclient.com/smartgwt/javadoc/com/smartgwt/client/data/...
 under LGPL, and no Smart* server-side component.

  I commonly use REST and GWT in perfect harmony and it is very easy.
  Assuming you have the ability to output JSON instead of XML you can
  just use overlay types and get very efficient parsing.

 We have control over server APIs, and we have both JSON and XML. Would
 it be possible to share some sample code?

 . I personally
  don't know what TileGrid is,

 Seehttp://www.smartclient.com/smartgwt/showcase/#tiling_filter_sort
 d'n'd to sort. One should be able to change image captions, and have
 the customized data source trigger appropriate PUT requests to update
 the server items. I'd love to see this functionality from GWT.

  out of the box GWT isn't intended to
  be a widget library, but there are plenty of them out there.  Google
  is trying to add a lot more widget support which is evident by the
  data presentation widgets, but their original intent was to create a
  flexible and efficient cross compiler, not make a pretty UI library.

 Point taken.

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Re: why we probably won't use GWT for a large UI project

2010-08-12 Thread lineman78

Not to mention the licensing on GXT is not for commercial use.  My
suggestion is to try to piece together all the UI elements you need
from other libraries or write your own as they will be more efficient
and integrate with one another better.  Also, don't be lazy and pick a
UI library by it's LAF, wonders can be done with CSS if you are
willing to spend a little time.  Don't get me wrong, I think both
options are valid for UI libraries, but I often think their
shortcomings are overlooked due to the eye-candy appeal.  FYI, I have
experimented with both libraries and both applications were eventually
rewritten in pure GWT and the performance increase in IE was drastic
and memory usage eas more than halved.  Also, resource bundles are
your friend when it comes to efficiency, just watch out for the IE
implementation of ImageResource; it can bite you.

On Aug 12, 11:47 am, Kevin Qiu kevin.jing@gmail.com wrote:
 Totally agree with lineman78 on the use of SmartGWT. We used SmartGWT to
 build a prototype, only to find out that mixing Js library wrapper with
 native GWT is bad. It's super easy in SmartGWT if you're building a simple
 CRUD application, but anything beyond that which requires customized widgets
 in GWT, then good luck, not to mention you can't use all the benefits of the
 GWT compiler. We're currently using ExtGWT. It's nicer in that it's (mostly)
 natively GWT, so you can always trace down the Java code, but still it's
 layout is expensive, and widgets are not 100% compatible with the GWT widget
 system. The event system is a mess to work with. We really need a good UI
 library, preferrably supported by Google that's built on top of vanilla GWT
 widgets.

 On Thu, Aug 12, 2010 at 1:22 PM, lineman78 linema...@gmail.com wrote:
  I can't help you with the TileGrid other than saying that you could
  write something similar yourself with a little effort assuming you are
  willing to overlook some of the niceties such as animation.  I have
  used SmartGWT in the mast and would warn you to use extreme caution in
  making the decision to use it.  It is not a GWT implementation, but a
  GWT wrapper around an existing javascript library, so you don't get
  all the advantages the GWT compiler gives you such as dead code
  elimination and obfuscation.  The SmartClient JS library is modular,
  so you can only load the modules you need, but as with any JS library
  I would estimate most sites only use 10-20% of the code they download
  and load.  Also, SmartClient and ExtJs both use a heavy layout engine,
  which I have noticed causes major slowing in IE.

  Unfortunately I cannot provide source code, but I can point you to
  some resources and explain my approach.  Here is an article by some
  GWT contributors on overlay types that should help you get started:

 http://code.google.com/p/google-web-toolkit/wiki/OverlayTypes

  I am using what they call the old way in that wiki.  To further
  expedite things, which you might consider depending on the size of
  your project; I have written an overlay type generator.  All I have to
  do is write an interface for the overlay type and have the interface
  extend JsonObject and it will generate the overlay type for me:

  public interface JsonObject {
     public void setJso(JavaScriptObject jso);
     public JavaScriptObject getJso();
     public void setJson(String json);
     public String getJson();
  }

  public interface Shape extends JsonObject {
     public void setArea(double area);
     public double getArea();
  }

  GWT.create(Shape.class); produces:

  public class ShapeJso implements Shape {
     private JavaScriptObject jso;

     ...

     public void setArea(double area)
     {
         setAreaImpl(jso, area);
     }

     private native void setAreaImpl(JavaScriptObject jso, double area)
     /*-{
         jso.area = area;
     }-*/;

     ...
  }

  This is very simplified, but I have given you a few hints to some of
  the tricks I had to use to get the generator method to work(see:
  JsonObject).  Usually you would extend JavaScriptObject, but in order
  to get the generator to work right I had to save it as an attribute.
  You will want to consider if the generator is the right approach, I
  think it took me a good 8-10 hours in the end to make a generator that
  works for almost every case.  But you can get one that works for most
  cases in 2-4 hours as long as you aren't doing anything too complex.

  On Aug 11, 3:01 pm, marius.andreiana marius.andrei...@gmail.com
  wrote:
   Hey,

   On Aug 11, 11:00 pm, lineman78 linema...@gmail.com wrote: As far as
  SmartGWT goes, I will warn you that I think the problems and
performance hits you will run into are not worth the UI that you
gain.

   Thanks for the heads up. A hello world with data bound widgets seemed
   straightforward.

Plus you must consider the licensing, which is required in
order to use their data binding.

   Looks like we can use thishttp://
 www.smartclient.com

Re: Service Location on Server Side

2010-08-11 Thread lineman78

This usually isn't the way something like this is done and there is
one major issue that can come up when doing this.  App servers will
have a maximum simultaneous connections and when you do this, one
request will actually take up 2 of these connections and if you start
chaining more and more together you can create a dead-lock.  The way
this is usually handled is that all of the business logic exists in an
EJB such as an SLSB and the services merely forward the requests to
the EJBs.  This way they can call within themselves.  This also will
allow you to maintain security.

On Aug 11, 8:01 am, Bill bill.milli...@gmail.com wrote:
 Hello,

 This feels like a silly question.  Please forgive if so.

 For my simple proof-of-concept application, I have two RPC services,
 both of which may be accessible by the client.  However, for one of my
 use cases, I need for one of the services to access the other
 service.  Is there any mechanism by which this can happen?  I can't
 find any hints of this in the documentation.

 Let me put this a different way:

 1.  Client invokes Create on service A.
 2.  Service A invokes Create on Service B.
 3.  Service B creates a resource and returns info to Service A.
 4.  Service A creates a resource and returns info to the Client.

 In order for this to happen, Service A needs to be able to find
 Service B, on the server-side.  How can I accomplish this?

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Re: More woes with IE + Client(Image) Bundles

2010-08-11 Thread lineman78

This is actually a problem in the way they have implemented
ImageResource in IE.  It is not scalable as the Gecko and Webkit
implementations are.  In order to make it scalable you will have to
add the repeat both annotation on it, which will keep the generator
from bundling it with other images in the IE implementation.  This
also shouldn't effect performance in the Gecko and Webkit
implementations, but it will increase load time in the IE
implementation as a new image will be generated for every resource.

On Aug 11, 7:00 am, Sean slough...@gmail.com wrote:
 I have a widget that dynamically makes medals. What it does is takes
 the place they are in (1st,2nd...) and gets the right color background
 medal from a ClientBundle, then using the same Client Bundle it
 creates the number from the ClientBundle, which has the #'s 0-9 in it.
 If it's 10, it grabs 1 and 0, and scales them accordingly. It takes
 all these images and arranges them on an Absolute Panel to center
 everything and it works amazingly well.

 Except of course on IE. When on IE it looks like it takes the whole
 ImageBundle and smooshes it together with all transparency lost of
 course. I am SO sick of IE. I like to do lots of things with Images
 and Bundles and I find IE messes it up almost every-time.

 Is there anyway around this or should I check for the user using IE
 and warn them their browser sucks and my site won't always render
 correctly using it?

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Re: why we probably won't use GWT for a large UI project

2010-08-11 Thread lineman78

I completely disagree with Stefan, GWT-RPC is no more secure than
REST.  For both to be secure by the broad definition of the term you
simply need to make them run over SSL.  The only perceived security
you get via GWT-RPC is by obscurity, which is not security at all.

As far as SmartGWT goes, I will warn you that I think the problems and
performance hits you will run into are not worth the UI that you
gain.  Plus you must consider the licensing, which is required in
order to use their data binding.  GXT(ExtGWT) is actually nice, but
their layout is expensive as well as their licensing.

I commonly use REST and GWT in perfect harmony and it is very easy.
Assuming you have the ability to output JSON instead of XML you can
just use overlay types and get very efficient parsing.  If you must
use XML, it is like using any other DOM parser.  I agree that built-in
dnd support would be very nice, but GWT-DND isn't bad.  I personally
don't know what TileGrid is, but out of the box GWT isn't intended to
be a widget library, but there are plenty of them out there.  Google
is trying to add a lot more widget support which is evident by the
data presentation widgets, but their original intent was to create a
flexible and efficient cross compiler, not make a pretty UI library.

On Aug 11, 10:48 am, marius.andreiana marius.andrei...@gmail.com
wrote:
 From this point of view it makes sense. Will have a look at ExtGWT  
 Vaadin.

 On Aug 11, 12:14 pm, cokol eplisc...@googlemail.com wrote:

  hi,

  goods thoughts you had, but dont treat GWT as a framework, Google
  doesnt do it either :-) Its just a toolkit or better yet, a JS
  compiler with some tooling around. And being just a toolkit is more
  powerful than create yet another throw-away ajax framework! There're
  plenty wonderful ajax frameworks around so why should GWT be just
  another one?!

  so its best choice for you to get on fast productivity with GWT - but
  from the beginning consider using a real framework BASED on GWT,  i.e.
  SmartGWT or ExtGWT or I also would suggest to look at Vaadin...

  for me personally I would prefer ExtGWT rather than SmartGWT because
  smart is not written purely in Java but is just  a wrap on existing
  smartClient technology, which has some drawbacks.

  regards

  On 10 Aug., 10:27, marius.andreiana marius.andrei...@gmail.com
  wrote:

   Hi,

   We're working on a large project, which has the back-end is written in
   a non-Java technology, with REST APIs. We're looking for a framework
   to replace the current UI.

   I did a brief analysis of using 
   GWT:https://docs.google.com/document/edit?id=16rQknO-r3ZqfMbuIl0R52OnFcWB...

   I'm looking to get this group's feedback before I present my findings
   to the team. What do you think?

   Thanks,
   Marius

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Re: Scraping website with GWT

2010-08-10 Thread lineman78

First of all GWT is executed client side and therefore XSRF security
should prevent you from scraping another site directly.  However, you
can do scraping quite easily with server-side java.  PHP is also a
server executed language, so anything you would usually do in php, you
will do it via server side java with GWT.  There are a few different
ways you can scrape a page in java.

1) External Libraries (JScrape, XQuery)
2) Parse the HTML as XML (DOM or SAX)
3) Regex

These all require you to get the HTML page as a string which is rather
easy (see URL.openConnection)

On Aug 10, 6:48 am, Fermin fermin.h...@gmail.com wrote:
 Hi,

 I don't found any reference to do scraping with GWT, is posible ? Like
 CURL in php ?

 Thx 4 all

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Re: cross-domain with GWT (load JavaScript)

2010-08-10 Thread lineman78

The SOP doesn't apply to script tags.  This is the idea behind JSONP.
Speaking of which, this code is from the JsonpRequest class:

ScriptElement script = Document.get().createScriptElement();
script.setType(text/javascript);
script.setSrc(uri.toString());
Document.get().getElementsByTagName(head).getItem(0).appendChild(script);

On Aug 10, 7:23 am, Vincent COROLLEUR vcoroll...@gmail.com wrote:
 Hello,

 I'm trying to load dynamically a script from another domain.
 I think it doesn't work because of the cross-domain protection.

 I'd like to do something like that :

 Element script1 = DOM.createElement(script);
 script1.setAttribute(type, text/javascript);
 script1.setAttribute(src, crossdomainURL);
 RootPanel.getBodyElement().appendChild(script1);

 Any ideas ?

 Regards,

 Vincent COROLLEUR

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Re: Synchronizing server and browser date/time?

2010-08-10 Thread lineman78

Lucky for you the Java Date object handles timezones for you.  As long
as you are okay with an an accuracy of up to 5 secs you should be okay
with this method.  Are you using GWT RPC?  If so, just create a method
that returns a new Date from the server.  If not, create a servlet
that just outputs new Date().getTime() and you can instantiate a Date
with that long client side.  Java's Date object is based off Unix
time, so if you want to know more about how that works Google it.

On Aug 10, 3:21 am, Ed post2edb...@gmail.com wrote:
 I do date/time comparision in the browser and I can't assume that the
 browser date/time is correct so I think I have to synchronize the date/
 time on the server with that on the browser as I know the server date/
 time is correct.

 Anybody any experience with that? or Idea's?

 I was thinking about retrieving the date/time from the server at
 startup of the app and then calculating the difference with that of
 the browser and add that as offset each time the date/time is
 retrieved in the browser.

 But what about different timezones?...
 Suppose somebody opens my website in another timezone, how does this
 effect the date/time that comes from the server. how is that seen in
 the browser? H I am a bit lost here.

 Please some advice?

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Re: GWT is it fully compatible with ie6 ?

This is a misconception about GWT.  It gives you the tools to handle
IE6 problems, but it doesn't completely protect you from all of IE6's
problems.  The built in widgets do a pretty good job at dealing with
IE problems and the layout panels do promise to act the same on all
browsers, but the regular panels don't.  All non-layout panels and
most widgets are just wrappers around html objects, wo you will have
to deal with the same layout bugs you would have to with pure html and
javascript.  However, GWT does provide some really nice tools for
dealing with these differences.  Deferred binding can be used to
substitute different implementing classes depending on the browser.
This can be demonstrated best by the way Google handles ImageResource
under the covers.  For IE it creates a traditional sprite by slapping
a bunch of images together to make one, however in FF it actually
inlines the bitmap data into the javascript, so it looks like: img
src=data:.../.  Also, CssResource now provides conditionality so
that you can make the css different depending on the browser.

On Aug 5, 1:59 am, Nicolas KONDRATEK n.kondra...@gmail.com wrote:
 Hi,

 I write an application in GWT, but I find many differences between IE
 7/8 and IE6.

 Gwt is it fully compatible with ie6 ou Google stop IE6 support ?

 Thanks you.

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Re: Need Help!!!About the difference between smartgwt and gwt for component Window

You need to enable modality in the smartGwt window:

winModal.setIsModal(true);
winModal.setShowModalMask(true);

On Aug 4, 8:41 pm, JIE SUN sunjie1...@gmail.com wrote:
 Hi guys:

 I had difficult to set up a smartgwt window as sam functionality as
 the one in gwt.
 Basically, I just need to click a button, and a panel pops up,
 meanwhile all other components at background will be greyed out.
 However, when I use the component window in smartgwt, it looks like
 does not have that functionality and i still can edit the background
 components.
 I have tried just create the window from gwt, it does not work since
 all the background component created from smartgwt, and the window
 created from gwt even pops up, but u cannnot edit it and even click
 it.

 Any ideas? or suggestions?

 Many thinks guys!!!

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Re: GWT is it fully compatible with ie6 ?

I don't disagree with you.  Google provides implementations that work
well in almost all configurations EXCEPT the panels.  People expect
the layout panels to act the same in all browsers and they don't.  In
most cases they are just extensions of a table.  If you don't want to
think about any differences between browsers at all you would be
better off using a true UI infrastructure like GXT or SmartGWT, but
these are very expensive and not very flexible.  For example, I often
see questions on here about people complaining that their horizontal
panel looks right in FF, but not IE.  This is because the
HorizontalPanel only wraps a table and you are still subject to IE's
table layout issues.  Same thing with DIVs and running into the box
model bug.  Yes the layout panels do require standards mode, but the
only time where that caused an issue for me is I had gotten into the
bad habit of not putting units in my css and figuring it would assume
px, which it doesn't do in standards mode.  The layout panels aren't
for every application, but they are really nice if you are writing
more of an application than a website and it makes the dock panel act
correctly across all browsers, which I always had issues with IE
before.

On Aug 5, 12:13 pm, darkflame darkfl...@gmail.com wrote:
 Put it this way, I very rarely have to browser sniff in my code, and
 I've done some fairly extensive gwt products that run on IE6.
 I think your underestimating just how much it compensates for ie's
 problems, even with normal widgets.

 While you can certainly manually take advantage of Deferred Binding,
 GWT does it automatically for many standard widgets, deals with a few
 dom issues, and (imho) is one of the biggest saleing points of gwt.

 Also, I'm not sure the new Layout panels will support IE6 that well.
 Haven't had a chance to check them out in a project yet, but they do
 demand standards mode, and the idea seems to be to use the native
 layout handling of the browser more, not less. I'd hazard that that
 might well be worse when dealing with ie6, not better.
 (though it should be faster).

 On Aug 5, 6:08 pm, lineman78 linema...@gmail.com wrote:

  This is a misconception about GWT.  It gives you the tools to handle
  IE6 problems, but it doesn't completely protect you from all of IE6's
  problems.  The built in widgets do a pretty good job at dealing with
  IE problems and the layout panels do promise to act the same on all
  browsers, but the regular panels don't.  All non-layout panels and
  most widgets are just wrappers around html objects, wo you will have
  to deal with the same layout bugs you would have to with pure html and
  javascript.  However, GWT does provide some really nice tools for
  dealing with these differences.  Deferred binding can be used to
  substitute different implementing classes depending on the browser.
  This can be demonstrated best by the way Google handles ImageResource
  under the covers.  For IE it creates a traditional sprite by slapping
  a bunch of images together to make one, however in FF it actually
  inlines the bitmap data into the javascript, so it looks like: img
  src=data:.../.  Also, CssResource now provides conditionality so
  that you can make the css different depending on the browser.

  On Aug 5, 1:59 am, Nicolas KONDRATEK n.kondra...@gmail.com wrote:

   Hi,

   I write an application in GWT, but I find many differences between IE
   7/8 and IE6.

   Gwt is it fully compatible with ie6 ou Google stop IE6 support ?

   Thanks you.

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Re: Who knows how to execute native code in server-side

If you are using app engine, I don't think this is possible.  I have
successfully made native calls in glassfish though using
System.load(), but you need to add the library path to the native lib
classpath in the admin console.  Also, you will run into the problem
where the library is loaded by the system class loader, so it is not
released until you restart the entire server and will not be unloaded
when you undeploy your app.

On Aug 5, 10:59 am, Yingwei HU husi...@gmail.com wrote:
 Hello, all.
 Who knows how to execute native code in server-side?
 There is  no Runtime class in gwt.
 I either can not use system.load(lib) to recall the outside dll due to
 security control.
 What can I do to solve this problem?
 Thank you.

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Re: how to parse news rss feeds?

2010-08-04 Thread lineman78

The problem you are having is related to the Same Origin Policy(SOP)
within the browser. It basically says that code can only load data
from the server it is loaded from. That is why I suggested the server
side proxy in both solutions above. Unfortunately this means the
server is making the request for you, so any personalized RSS feeds or
ones that require authentication will not be accessible. If you would
like to avoid writing your own proxy you can try using YQL for JSONP:

http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20xml%20where%20url%3D'http%3A%2F%2Frss.news.yahoo.com%2Frss%2Ftopstories'format=jsoncallback=cbfunc

On Aug 4, 10:12 am, kumar decent.p...@gmail.com wrote:
Hi lineman,

Thanks for giving me response, my problem is not the parsing.. problem
is parsing from public server feeds which will provide news.
I have tried with RequestBuilder class but i unable to read data from
other servers (Ex. Google news feed, yahoo news feed etc..).. data
coming as null.. I have searched on the google but i have't find any
solutions..

Thanks
Please provide information about parsing from other servers
On Aug 4, 8:50 am, lineman78 linema...@gmail.com wrote:

The easiest, but not most efficient way would be to write a server
side proxy to fetch for you and use the built-in GWT DOM parsing API.

http://google-web-toolkit.googlecode.com/svn/javadoc/1.5/com/google/g...

The most efficient method that I would use is to use the RSS XSD to
generate JAXB classes which will be used in the proxy to parse the RSS
and convert it into JSON so it can be parsed faster on the client. I
would also add a server-side cache so multiple clients viewing the
same RSS feed aren't making multiple requests per minute, cacheing for
1 minute would be sufficient I think.

On Aug 3, 1:28 pm, kumar decent.p...@gmail.com wrote:

how to parse news rss feeds?
RSS feed like any of news sites or google news... please help me

Re: Setting a height in % within a 'rounded-corners' panel

2010-08-04 Thread lineman78

The td being 100% will do nothing if the table isn't 100%.  Remember,
% based is in relation to the parent, in the case of a td the table is
set to auto size and therefore the cell being 100% won't matter.  I
also suggest looking at the layout panel as a parent panel due to the
fact that it helps with inconsistencies between browsers.

On Aug 4, 7:11 am, Johannes Lehmann johannes.lehma...@googlemail.com
wrote:
 Hi,

 I have the following problem: I want a window-like panel with rounded
 corners inside a nested structure of other panels. The content of the
 window should scale automatically (preferably via CSS: height 100%,
 scaling it via ResizeHandlers introduces much scope for things to go
 wrong).

 Eventually I realized that heights in % are ignored if they are inside
 a td table cell. So I changed my layout to only use div based
 panels, of course finally realizing that unsurprisingly the
 DecoratorPanel itself is a table. Changing that to a SimplePanel makes
 everything work fine.

 Does anyone have an elegant solution to how I could either achieve
 what I want? Of course if needs be I can resize the contents of the
 DecoratorPanel using a ResizeHandler, but it seems like there ought to
 be a better way...

 Cheers,

 Johannes

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Re: using ClientBundle

2010-08-03 Thread lineman78

The purpose of clientbundle is to refer to files that are not deployed
on your server.  If you need to deploy the resource for other reasons
you will not want to use clientbundle.

On Aug 3, 9:37 am, Olivier olivier.dau...@gmail.com wrote:
 Hi,

 don't make a reference to something in the WAR folder, put your image
 at the same level as the clientbundle for example.
 Or create a resources folder, but you will have to reference your
 image like this
 @source(my/package/with/dot/img.gif)

 regards

 Olivier

 On Aug 3, 1:09 pm, avi.yaf...@gmail.com avi.yaf...@gmail.com
 wrote:

  Hi

  i need to find a way to point out the the @Source location outside the
  package com. envvoirment.
  i want to create 'images' directory in 'war' directory and write
  {
  @Source (/war/images/img.gif)
  ImageResource img()

  }

  but when i write this i get an error Resource 'img.gif' is missing
  expected.. 

  is it possible to this?

  Thanks,Avi

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Re: JSONP: Overlays with Optional Attributes (HostedModeException's), How?

2010-08-03 Thread lineman78

Reported in Feb, still listed as new, so make sure you vote:

http://code.google.com/p/google-web-toolkit/issues/detail?id=4646

On Aug 3, 1:07 am, Andrew Hughes ahhug...@gmail.com wrote:
 Fixed... but I think this stinks :)

     public final Double getXMin(){
         return isXMinNull() ? null : getXMinValue();
     }

     private final native boolean isXMinNull()/*-{
         return this.xmin == null;
     }-*/;

     private final native double getXMinValue()/*-{
         return this.xmin;
     }-*/;

 On Tue, Aug 3, 2010 at 11:50 AM, Andrew Hughes ahhug...@gmail.com wrote:
  Thank's again André :)

  I've made some progress. you'r suggestion to use Integer and not
  primitive int was bang on the mark! :) Unfornately autoboxing was masking
  some of my problems - but now I have learnt the error's of my ways :)

  Now I am happily using Integer with and without null values...

      public final native Integer getCode()/*-{
          return this.code;
      }-*/;

  HOWEVER, Double  double won't work. Double works with null but not a
  valid javascript Number... and vice-a-vera with double. I've looked at all
  the documentation... going crazy to tell you the truth over such a small
  simple issue.. but your helps been great THANK YOU! :)

  --AH

  2010/8/3 André Moraes andr...@gmail.com

   1) This HostedModeException is very annoying. Null (or in JavaScript
  terms 'undefined') is a valid value for my JavaScript/JSON attributes. I
  want a way where if the darn thing is undefined return null... don't throw
  a HostedModeException  - I also tried in jsni if(this.attribute){ return
  this.attribute; } else { return undefined } but the exception is still
  thrown.

  in your Jsni instead of

  if (this.attribute) { return this.attribute; } else { return undefined; }

  try

  if (this.attribute) { return this.attribute; } else { return null; }

  In javascript, null and undefined are two differente things. When
  something is null, this means that an variable is defined and its value is
  null; If something is undefined that means there is no variable with that
  name.

  the statment: if (this.attribute) works because when in a boolean
  context, undefined is evaluated to false. Just like C where 0 is false and
  everything else is true.

  To solve the int problem, try to change the return type to Object and
  then check if the returned value is null. There is no way to return null
  in java if the return type of a method is a primitive int;

  I belive that since you are returning null from JSNI, the HostedMode will
  be smart enough to cast javascript null to java null. :)

  2) There is no documentation about how this will behave in production?
  Will it just return null? I don't know how I can ensure consistency 
  between
  dev and production modes :'(

  In production mode the javascript rules applies, so this probably will
  trigger an error in your browser. When using JSNI method is necessary to
  think in two different worlds (java and javascript). Check this link, maybe
  will help with the javascript type system:
 http://www.java2s.com/Tutorial/JavaScript/0100__Number-Data-Type/Prim...

  Hope it helps.
  --
  André Moraes
  Analista de Desenvolvimento de Sistemas
  andr...@gmail.com
 http://andredevchannel.blogspot.com/

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Re: Problem with UTF-8

2010-08-03 Thread lineman78

One simple way to check if it is Java/GWT code or the browser is to
add some UTF-8 chars straight to the html file.  If that is working
correctly then it must be either the Java file isn't UTF-8 or
something else is wrong.  Eclipse allows you to change the encoding of
files through the properties menu.

On Aug 3, 12:28 pm, Kiarash email@gmail.com wrote:
 Thank you David,

 I just did what you wrote and deleted the Java file and paste the code
 in the new Java file again and the same with the HTML file. I checked
 the properties and both had UTF-8 already but without success. On
 the browser the Swedish letters still replaced with other
 characters... My browser settings is on UTF-8 too!

 Do you have any other suggestions?

 //Kiarash

 On 3 Aug, 09:02, david.herv...@gmail.com david.herv...@gmail.com
 wrote:

  Hi,

  Have you specified theUTF-8before creating file or just change it
  while your files were created ?
  I've just copy paste your Label in a project where .java file 
  areUTF-8encoded and everything works fine.
  Just check on one of your file the properties that is attributed to it
  (contextual menu on one of the incriminated java file): here you must
  haveUTF-8.

  On Aug 2, 9:38 pm, Kiarash email@gmail.com wrote:

   I have a problem with Swedish letters coded in Java files as when I
   make a Label with Swedish letters,
   Label myLabel = new Label(här är något på Svenska);
   the Swedish letters changes to strange characters in the HTML file.

   I am using Eclipse.I made sure that:
   the html file has meta http-equiv=content-type content=text/html;
   charset=UTF-8
   the text file properties areUTF-8
   the project properties areUTF-8
   the edit set encoding areUTF-8

   Anybody facing the same problem or have a solution... thanx!

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Re: Ecryption best practices (server side, client side, password handling)?

2010-08-02 Thread lineman78

A lot of databases provide encryption so that you can prevent sys
admins from seeing the data without being authenticated to the DB
itself.  Oracle provides it natively, where MySql is a combination of
3rd party software.  If you are really paranoid MySql provides AES
encrypt/decrypt functions.

http://www.hotscripts.com/forums/database/54910-encrypting-mysql-database.html

Like Danny said, no point in reinventing the wheel, just use SSL.
Right now SSL is still justified by the simple fact that it would take
more expensive hardware to break the encryption than any data would be
worth that they may extract in most cases.  For authentication, I
would highly recommend using container managed security though with a
JDBC realm.  Most give you the option for choosing the hash type for
the password.

On Aug 2, 10:20 am, Danny Goovaerts danny.goovae...@gmail.com wrote:
 Stefan has allready made some very good comments so I'm not going to
 repeat them.
 Some more additional thoughts.

 Regarding encrypting the data in the database. If a user does not
 trust you (yourself and any of the people that have access to your
 server) to look at his data in the database,
 why would he trust you when you make the claim that his data is
 encrypted in the database? Furthermore, encrypting the data precludes
 providing any form of application
 level support to your users. Unless your service is exactly providing
 extremely secure storage of confidential data, I dont' see any reason
 for encrypting the data in the database and in that case you should
 find some security experts to assist you.
 This of course does not mean that you should not take precautions
 against data being accessed by unauthorized people or data being
 disclosed. But that falls
 under traditional secure server deployment.

 I'm afraid that there is no easy and proven solution to protect the
 confidentiality and integrity of  Internet based communication without
 https. The SSL//TLS protocols have been scrutinized by security
 experts. Unless you are such an expert, don't
 think that you can come up with something that is solid enough. I
 personally would not trust any security measure that has not been
 published and analysed by the security and encryption community.

 Dannywww.cellamea.eu

 On 1 aug, 17:06, Stefan Bachert stefanbach...@yahoo.de wrote:

  Hi Sven,

  i did have similar thought in the past.
  Encrypting the database base would solve any Datenschutz data
  protection topic since the application provider would not be able to
  even read the data of his customers.
  However, I do not see any easy solution, yet. Just encrypting any
  database data would destroy any orderings on indexes.
  It would work when only using equivalence, but this is a hard limit.

  The point of encryption should be the server.
  When you doing encryption on client side you must offer the encryption
  and decryption algo, too.
  So it is likely to loose more than to win. (And it is difficult to
  implement encryption without having an integral data type as it is the
  case with javascript).

  To hash the password on client side is equivalent as to put the
  password in clear to the database.
  You loose security when doing so. Any attacker would just send the
  encrypted password, may be to a similar service using the same
  approach!

  Any attacker could substitude the browser and code when he has a legal
  access to the service.
  So he can get the encryption algo and apply it to other users.

  The only thing which is under your control is the server.

  Stefan Bachert
  http::/gwtworld.de

  Inquiries for professional GWT support are welcome.
  I am sorry, I won't do free personal support.

  On 31 Jul., 19:07, Sven sven.ti...@googlemail.com wrote:

   Dear group,

   I want to extend a GWT/GAE application by offering the option to
   encrypt information entered by the user on client side in the
   database. The goal is to increase trust when storing potentially
   sensitive data, e.g. to prevent that people who have access to the DB
   (like me) have read access to the stored information.

   For client-side encryption using GWT I found this 
   post:http://www.mooreds.com/wordpress/archives/000529

   However, others do not even recommend to compute password hashs on the
   client and propose to do that on the 
   server:http://www.owasp.org/index.php/Hashing_Javahttp://stackoverflow.com/q..

   From user's perspective, I would not be comfortable with transmitting
   my data unencrypted to the server (even using HTTPS), as the server-
   side may for example log my information (and my password!). Especially
   for the password-part I would feel unconfortable, as many people tend
   to reuse their passwords (please no discussion about this :-)).

   Currently, I see two options:
   a) Encrypt and decrypt the information on the client using JS/GWT.
   Pro: The password never leaves the browser, the unencrypted
   information never leaves the browser. Con:

Re: ANT task for a web project using GWT

2010-08-02 Thread lineman78

There are no provided ANT tasks, however it is not that difficult to
write your own ANT macros to do what you want.  Unfortunately I can't
provide you with my macro, but this should be enough to get you
started:

macrodef name=gwtCompile
attribute name=module /
attribute name=dir default=${builddir} /
attribute name=output default=. /
sequential
java classname=com.google.gwt.dev.Compiler fork=true
dir=@{dir} failonerror=true
classpath
path refid=gwt.classpath /
path location=@{dir} /
/classpath
jvmarg value=-Xms${gwt.jvm.xms} /
jvmarg value=-Xmx${gwt.jvm.xmx} /
arg line=-localWorkers ${gwt.localWorkers} -style
@{style} -war /
arg value=quot;@{output}quot; /
arg line=@{module} /
/java
/sequential
/macrodef

this is an extreamly over-simplified version of my macro and will need
some work if you have any generators in your project because the GWT
compiler wants them as class files.  My version of the macro also
exposes a lot more of the other compiler options.

On Aug 2, 2:01 pm, Kady kaushika...@gmail.com wrote:
 I am trying to integrate couple of GWT 2.0 modules into a web project
 and wanted to integrate the build process of the modules with that of
 the project.

 What are the ANT task options that GWT provides? If not, then are
 there any other 3rd party tools?

 Thank you.

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Re: Browser Event Propagation

2010-08-02 Thread lineman78

event.preventDefault works in both firefox and IE if you use the
modern GWT event handling(handler registration method) instead of the
DOM event handling (pre 1.6).

On Aug 2, 3:04 pm, Falcon msu.fal...@gmail.com wrote:
 (You can also use event.returnValue = false, at least for IE.)

 On Aug 2, 3:50 pm, Falcon msu.fal...@gmail.com wrote:

  In browsers that don't support the W3C event model, you'll need to
  return false instead.

  (Also, to be clear, event.preventDefault() prevents the default
  browser action from happening, e.g. following a link that was clicked.
  event.stopPropagation() is what stops the event from bubbling through
  the DOM tree.)

  On Aug 2, 9:43 am, magat mathieu.a...@gmail.com wrote:

   Hi,

   I'm currently trying to set up a contextual menu on my gwt app, that
   is open a MenuBar in a PopupPanel on right-click. Using
   event.preventDefault() seems to stop the event propagation in my
   browser (Firefox 3.6) : my menu is displayed, not the browser one.

   I'm wondering if this behaviour was browser-specific ?  I can't help
   but thinking that the event propagation may be different on another
   browser. I couldn't find a clear answer in the doc, but maybe I missed
   something.

   Thanks for reading this post !

   Mathieu AGAR

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Re: Rounded tab styles in TabLayoutPanelTab

2010-07-30 Thread lineman78

There is no pure CSS solution short of using CSS3 border-radius.  For
efficiency I have stuck with this approach for now, but the most
compatible way is to make your own decoratedPanel that allows you to
only have rounded corners on top and use the widget in the tab.

On Jul 30, 8:08 am, Michael Jones mjones...@gmail.com wrote:
 Hello,

 I am trying to make the corners rounded in a gwt-TabLayoutPanelTab.  I
 have attempted a few things including setting:

 background-image: url(/website/images/bg_tab_first.png);

 but it doesn't seem to have an effect.

 Any suggestions would be greatly appreciated.

 Thanks in advance,

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Re: Integration of Gwt + Java Beans

2010-07-30 Thread lineman78

I regularly use this approach, the only thing that you have not
specified is you communication protocol.  Also, do you plan on
deploying as an EAR with an EJB and WEB module, or do you plan on
taking advantage of EJB3's ability to have EJBs within a web module?
I use the EAR approach.

On Jul 30, 3:40 am, Savdeep singh sabby.s...@gmail.com wrote:
 Hi everyOne,
 I want to ask if there is any problem in integration of Gwt(as Front
 End) + Java Beans (as Back End)...?

 Secondly is there any better or best approach for web application
 rather than these 2 combinations?

 Thirdly any other irrespective of the these 2 Q's the suggestions are
 welcomed :)

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Re: why doesn't this right-click capture work in IE?

2010-07-30 Thread lineman78

You are using the older method of event handling.  This method works
fine for me:

addDomHandler(new ContextMenuHandler()
{
@Override
public void onContextMenu(ContextMenuEvent event)
{
showMenu();
event.preventDefault();
}
}, ContextMenuEvent.getType());

On Jul 30, 11:16 am, BrianP brifo...@gmail.com wrote:
 I'm trying to capture right-clicks on a widget, to popup my own
 context menu instead of the browser's. I've researched it a bit and
 pieced together bits and I've got it working in Chrome and FF but not
 IE. In IE it doesn't display the default browser context menu, but it
 doesn't display my popup menu either. I'm just getting into GWT so I'm
 assuming I'm not doing something right with the right kinds of
 handlers or events. I'm also using the gwt-graphics module, that's
 where the Rectangle class that I'm extending comes from, in case
 that's relevant.

 Here's my code:

 public class RectangleRightClickable extends Rectangle {

 public RectangleRightClickable(int x, int y, int width, int height) {
     super(x, y, width, height);
     sinkEvents(Event.ONCONTEXTMENU);

 }

 public void onBrowserEvent(Event event) {
     GWT.log(onBrowserEvent);
     event.stopPropagation();
     event.preventDefault();
     GWT.log(event type :  + DOM.eventGetType(event));
     switch(DOM.eventGetType(event)) {
     case Event.ONCONTEXTMENU:
         if (DOM.eventGetButton(event) == Event.BUTTON_RIGHT) {
             GWT.log(Event.BUTTON_RIGHT, null);
             showMenu();
         }
         break;
     default:
         GWT.log(event.toString());
         break;
     }

 }

 protected void showMenu() {
     final RectangleRightClickable parent = this;
     final PopupMenu popMenu = new PopupMenu();
     popMenu.addMenuItem(new Label(Add thing));
     popMenu.setPopupPositionAndShow(new PopupPanel.PositionCallback()
 {
         public void setPosition(int offsetWidth, int offsetHeight) {
             int left = parent.getX() + parent.getWidth();
             int top = parent.getY() + parent.getWidth();
             popMenu.setPopupPosition(left, top);
         }
     });

 }
 }

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Re: Passing values between 2 screens (popups)

2010-07-29 Thread lineman78

If you were the one that spawned the screen you will have a javascript
referance to it and can call javascript functions on it.

http://codepunk.hardwar.org.uk/bjs12.htm

You will be able to do this in GWT by using the GWT Exporter library.

On Jul 28, 7:58 pm, Reinaldo \(Gmail\) reinaldo.manz...@gmail.com
wrote:
 Hi All.

 I`d like to know how would be the best approach to pass some data
 (attributes) from Screen A to Screen B. (Kind of popups)

 I want to avoid any request. I heard about putting the values in a cookie
 and get them later but I did not like that solution.

 Thanks

 Manza

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Re: Do we have any Library for OpenID autentication(Authentication using Google accounts/Face book etc.)

2010-07-29 Thread lineman78

You don't want to use GWT for authentication, what you want to do is
use the authentication provided to you by the container. The solution
that Danny provided does just that. You want to use a JSR-196
authentication provider like openId4Java and use your web.xml to
require authentication to access certain services within your
application.

On Jul 29, 9:17 am, Jeff Chimene jchim...@gmail.com wrote:
Hi:

I'm not convinced that GWT is the right environment for Authentication. GWT
is a great toolkit, but solving the authentication/authorization problem in
an application-agnostic way is a tough problem to solve.

FWIW, one of my current apps supports traditional username/password as well
as OpenID. The reason is that a few of the beta testers found OpenID too
confusing.

I don't use server side Java; I found some OpenID client validation code in
PHP that does what I want.

On Wed, Jul 28, 2010 at 10:00 PM, V M thinker...@gmail.com wrote:
Hello GWT Users,

I am just wondering if we have any Library to do authentication using
OpenID providers like Google accounts/Facebook.

Here is what i am trying to do:

* Create a site which needs log-in widget/page/module to customize UI for
Users.

What is the best way to create a Login form in this case?

I appreciate if you could point me to some examples.

Thanks in advance.

-V M

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Re: Web service call

2010-07-28 Thread lineman78

Due to the SOP you might need to write your own server-side
translator.  Personally, I would use the WSDL to generate a Java SOAP
client and use the same objects for a Jersey REST service to pass the
data down to the client.  Look at the Jersey project for REST
examples(the getting started guide is good).  Here is how to do a SOAP
client:

http://download-llnw.oracle.com/javaee/5/tutorial/doc/bnayn.html#bnayx

On Jul 27, 1:24 pm, Deepak Singh deepaksingh...@gmail.com wrote:
 Hi,

 With GWT 2.1

 My requirement is, I have to connect to different airlines thorugh their web
 services at the same time to search for available flights and then display
 the search result on my page.response
 I have wsdl files for all of them and methods to invoke and set request as
 xml string and get response as xml string. I have to do this search very
 very fast to get the response in 2 seconds from all the airlines. Kindly
 suggest the best approach to follow.
 If possible provide some sample code.

 Regards
 Deepak

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Re: Sorting in flex table

2010-07-28 Thread lineman78

I have extended this for my solution:

http://sites.google.com/site/psthapar/simplesortabletable

On Jul 28, 3:37 am, Manivannan Malaichamy manivann...@gmail.com
wrote:
 i want a sorting  in flextable.

 Any help..

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Re: How to show server log file on the client?

2010-07-28 Thread lineman78

I would prefer the log entries to be shown as they are created. I
think that in this case the server has to contact the client.

I have run into this use case a lot as a lot of my work has to do with
operational environments.  You are correct that the traditional way of
doing a notification of sorts is for the notification hub to contact
the notification listeners, but this is not feasible in a web based
environment(unless you can specify a browser that supports web
sockets).  The most effective and universal solution is to make REST
calls on a repeating interval and if you use a last modified
architecture(only return stuff that has happened since the listener
last requested the data) you can shorten the refresh time to the point
where it is almost instantaneous.  I suspect this is how most AJAX IM
and chat applications work(think Facebook Messenger).

On Jul 27, 11:21 pm, Magnus alpineblas...@googlemail.com wrote:
 Hi,

 I would like to show the contents of a log at the client side:

 There is a complex operation (chess move analysis) on the server,
 triggered by a client's RPC serivce call.
 The operation produces a list of log entries, which should be
 presented at the client.

 My intuitive idea is to collect the log entries and return them as
 part of the return value of the RPC call. But in this case, all the
 log entries would be presented at once.

 I would prefer the log entries to be shown as they are created. I
 think that in this case the server has to contact the client. But I
 have no idea of a concept for such a scenario, and I would avoid
 getting the whole scene too complex.

 How would you do that?

 Thanks
 Magnus

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Re: Writing a JS library in GWT?

2010-07-27 Thread lineman78

Once the GWT compile completes, it is up to the linker to decide how
to package it.  The single script linker should behave how you would
like, but you will have to make sure that deferred binding is never
used in your code unless only one permutation is possible.  The
default linker is an iframe linker, which is the bootloader you are
talking about.  Google knew some people wouldn't like this and would
like to do exactly what you are saying, which is why they maintain the
SingleScriptLinker.  If it doesn't behave exactly as you would like
you may have to pull the source down and modify it to fit your needs.
There needs to be exactly one primary linker, therefore there is no
disable bootloader compile option because a linker must be provided in
order for GWT to know how to distribute and load the code.

http://google-web-toolkit.googlecode.com/svn/javadoc/2.1/com/google/gwt/core/linker/SingleScriptLinker.html

On Jul 26, 4:54 pm, S Rabin scottra...@gmail.com wrote:
 I see. So when the only thing in my loadModule function is an export
 call, and I export the method (via Ray Cromwell's gwt-exporter
 library, which I was already using):

 public void HelloTest(String id){
      DOM.getElementById(id).setInnerHTML(Hello World);

 }

 it should compile to 25kb plus a bootloader?  I'm not arguing that a
 bootloader is a bad idea for larger code, but I was really just hoping
 for a --disable bootloader compile option.

 To address your concern that there is 'no possible way for the code
 size to grow', and that the GWT compiler aggressively prunes dead
 code, yes, I'm fully aware that it is designed to do that.  That's
 why, when writing a function in GWT, I expect it to compile out to
 something that doesn't exceed the size of handwritten JS for the same
 purposes.  There are two options here: one, I'm missing some checkbox
 (and it's not the OBFuscated option), or two, GWT is including a lot
 more crap it thinks I need that I'm not aware of, hence why I'm asking
 how to fix it.

 As for whether I know better than Google when it comes to the
 bootloader... yes, in this case, I do.  I anticipate this library to
 be approximately 10kb of handwritten javascript, and I'm not doing
 anything that should warrant more than 1 permutation beyond browser
 specific speed optimizations.  Therefore, distributing the library as
 a .js file instead of a bootloader plus 4 different permutations seems
 like a better idea.

 Is my only option here really to write my own linker to output one .js
 file, no bootloader, no browser-specific optimizations?

 On Jul 26, 12:42 pm, lineman78 linema...@gmail.com wrote:

  First, let me start by saying that people are already writing
  javascript libraries using GWT and have been for some time.  Ray
  Cromwell created the GWT exporter library for this exact purpose for
  his own usage and open sourced it.  While bootloaders seem expensive
  it is the only way to deliver the most efficient code to the client.
  There is no possible way for code size to grow when compiled because
  if you go far enough every method will eventually make it to a JSNI
  method, so what you are missing in your calculations is all the code
  supplied by google and the small overhead code involved with the
  bootloader.  However, there is a linker available to create only one
  output, but in order for this to work the compilation must result in
  only one permutation, which is almost impossible unless you know the
  browser your client will be using.  You asked: Is there a way to crop
  out all the unnecessary cruft GWT seems to think I need?.  You can
  write your own linker if you feel that you know better than google
  when it comes to the bootloader, but as far as the compiled code
  itself; the GWT compiler has very aggressive dead code elimination, so
  any output code will be used at some point.

  On Jul 26, 9:21 am, S Rabin scottra...@gmail.com wrote:

   I've done quite a bit of searching to find any information about this,
   but it seems that people are more concerned with writing GWT libraries
   to keep in GWT before compilation.

   I would like to write the libraries I frequently use in my projects in
   GWT, then compile and expose them to hand-written Javascript.  I have
   several issues with the way GWT seems to handle what I want to do:

   1) Bootstrapping.  I understand that the iframe loading method is
   highly efficient for large codebases so as to make the page non-
   blocking, but for a small library bootstrapping is overkill.  To test,
   I tried writing my TableGenerator library (a 7kb handwritten non-
   minified library) in GWT.  The result was a 6 kb deferred binding
   loader file (table.nocache.js) and 4 permutations of compiled JS
   weighing in at 20-30kb each.  Which brings me to issue #2

   2) For compiling the code, GWT seems to produce LARGER codebases.
   Fast, yes, but how does 3-5kb of source result in 20-30kb of compiled
   javascript? Is there a way to crop out all

Re: Standards Mode + Decorated Popup Panel + IE == FAIL

2010-07-27 Thread lineman78

I can confirm that this did fix the problem.

On Jul 27, 10:38 am, lineman78 linema...@gmail.com wrote:
 According to this bug it has been fixed in 2.0.4, I will try updating
 and let you know if it worked:

 http://code.google.com/p/google-web-toolkit/issues/detail?id=4532can...

 On Jul 27, 3:15 am, randomwalk ligaomob...@gmail.com wrote:

  Have the exact same problem with IE8 in standards mode. I'm not using
  Decorated Popup Panel though. I wrote my own PopupWindow class that
  extends PopupPanel.

  On Jul 6, 5:31 pm, lineman78 linema...@gmail.com wrote:

   I am having aproblemwhere I have changed to standards mode in order
   to use layout panels, but it seems to have broken decoratedpopup
   panel inIE(thepopupshows, but the rest of the screen turns white
   behind it).  I have taken a very rough look with Firebug Lite and
   didn't see anything obvious and was just wondering if anyone else has
   seen thisproblem.  Again, I have not done a whole lot of debugging
   yet, but I am in standards mode with IE6 and a DockLayoutPanel as my
   root.  When I click on the button to pop up thepopupshows up, but
   everything else goes white, but as soon as you resize the window
   everything paints correctly again.  Is there a way to tell the browser
   to manually do a repaint maybe?

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Re: Bug in calculating “Absolute top” position u sing GWT framework

2010-07-27 Thread lineman78

Are you sure that the problem is the getAbsoluteTop method, or is it
muliplying the + 10 for you without you knowing and messing things
up.  Try taking out the +10 and see if it consistently shows on the
top left.

On Jul 27, 2:19 am, Ragothaman Thanikachalam gwtforum4r...@gmail.com
wrote:
 In ie7 browser set zooming level 100%, and open GWT showcase
 application.http://ongwt.googlecode.com/svn/trunk/com.google.gwt.sample.showcase

 Click “Show Basic Popup” button. Now the popup panel opens over this
 button.
 Change the zoom level to 125%
 Continue the previous step.
 Now the popup panel position looks strange.

 But in IE8 its works perfect.
 Can any one help me to resolve this problem?

 Thanks
 Ragoth…

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Re: uibinder @import url..

This is an external stylesheet and cannot be used with the @import
annotation.  As I said before, you will have to either download the
css and include it with your module or add it to the gwt.xml file.

On Jul 26, 8:02 am, asianCoolz second.co...@gmail.com wrote:
 can you give example how to use styleInjector replace of @import?

 i'm refering tohttp://code.google.com/p/google-web-toolkit/wiki/StyleInjector
 and try put @Source(http://fonts.googleapis.com/css?family=Lobster;);
 but eclipse prompt for error. any example?

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Re: TabPanel within TabPanel styling

you can also use css dom selectors that would style the gwt-tabPanel
classes differently if they are the child of another gwt-tabPanel

On Jul 25, 9:30 am, mobilekid mobilek...@googlemail.com wrote:
 My app's layout consists of a TapPanel, which holds another TabPanel.
 I'd like to have the two TabPanels look differently. Following the GWT
 tutorial on applying styles I did the following:

 TabPanel innerTabPanel= new TabPanel();
 //carriersTabPanel.setSize(100%, 100%);
 innerTabPanel.addStyleName(inner-tabPanel);

 .gwt-TabPanel .inner-tabPanel{
     width: 100%;
     height: 100%;}

 This, however, did not have any effect whatsoever. Then I tried the
 following, but that didn't work either:

 .inner-tabPanel{
     width: 100%;
     height: 100%;

 }

 So how I can style the two panels separately?

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Re: Writing a JS library in GWT?

First, let me start by saying that people are already writing
javascript libraries using GWT and have been for some time.  Ray
Cromwell created the GWT exporter library for this exact purpose for
his own usage and open sourced it.  While bootloaders seem expensive
it is the only way to deliver the most efficient code to the client.
There is no possible way for code size to grow when compiled because
if you go far enough every method will eventually make it to a JSNI
method, so what you are missing in your calculations is all the code
supplied by google and the small overhead code involved with the
bootloader.  However, there is a linker available to create only one
output, but in order for this to work the compilation must result in
only one permutation, which is almost impossible unless you know the
browser your client will be using.  You asked: Is there a way to crop
out all the unnecessary cruft GWT seems to think I need?.  You can
write your own linker if you feel that you know better than google
when it comes to the bootloader, but as far as the compiled code
itself; the GWT compiler has very aggressive dead code elimination, so
any output code will be used at some point.

On Jul 26, 9:21 am, S Rabin scottra...@gmail.com wrote:
 I've done quite a bit of searching to find any information about this,
 but it seems that people are more concerned with writing GWT libraries
 to keep in GWT before compilation.

 I would like to write the libraries I frequently use in my projects in
 GWT, then compile and expose them to hand-written Javascript.  I have
 several issues with the way GWT seems to handle what I want to do:

 1) Bootstrapping.  I understand that the iframe loading method is
 highly efficient for large codebases so as to make the page non-
 blocking, but for a small library bootstrapping is overkill.  To test,
 I tried writing my TableGenerator library (a 7kb handwritten non-
 minified library) in GWT.  The result was a 6 kb deferred binding
 loader file (table.nocache.js) and 4 permutations of compiled JS
 weighing in at 20-30kb each.  Which brings me to issue #2

 2) For compiling the code, GWT seems to produce LARGER codebases.
 Fast, yes, but how does 3-5kb of source result in 20-30kb of compiled
 javascript? Is there a way to crop out all the unnecessary cruft GWT
 seems to think I need?

 3) I would prefer to not have a bootloader - I anticipate the compiled
 form of my code is going to be smaller than the bootstrap code and
 would rather it just be loaded.  Is there a compilation option to
 disable permutations and output (obviously more to handle different
 implementations) code that works in all browsers?

 Sincerely,
 Scott Rabin

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Re: GWT Error Unable to find .gwt.xml

This is a generic error and can be caused by many different things.

1) Malformed include in gwt.xml
2) Classpath issues
3) Malformed script tag in the head of the html file
4) Trying to use a non-GWT project

I have also randomly seen this error in hosted mode and a Ctrl+F5
usually fixes it.  This used to be a common occurrence before OOPHM
with Eclipse and rename-to combined with an external server, so if you
are using an older version of GWT(pre 2.0) I suggest updating.

On Jul 26, 12:14 pm, Soeren B soeren.bueh...@googlemail.com wrote:
 Hi Community,
 many of you know the following problem:

 ERROR] Unable to find 'uivers2/Uivers2.gwt.xml' on your classpath;
 could be a typo, or maybe you forgot to include a classpath entry for
 source?

 Has anyone solved it? Could you please say me what I have to do? I
 imported the JAR of the newest incubator of gwt, I am working with gwt
 2.04.

 Regrads,
 soeren

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Re: web-kit gradient not working

2010-07-24 Thread lineman78

someone just asked this question 2 days ago, there is a bug report in,
you have to wrap it with a literal for now in uibinder or cssresource.

http://code.google.com/p/google-web-toolkit/issues/detail?id=4877

On Jul 24, 9:34 am, asianCoolz second.co...@gmail.com wrote:
  background-image: -moz-linear-gradient(100% 100% 180deg, #2F2727,
 #1a82f7) !important;
     background-image: -webkit-gradient(linear, 0% 0%, 0% 100%,
 from(#1a82f7), to(#2F2727)) ;

 the first one work on uibinder, but the second one not showing up in
 safari. anyone can comment on this? i'm using gwt2.1m2

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Re: uibinder @import url..

2010-07-24 Thread lineman78

From the CssResource documentation:

The @import statement will only work for other CssResources, not for
URLs at runtime, since the .gwt.xml or StyleInjector can be used in
those cases.

http://code.google.com/p/google-web-toolkit/wiki/CssResource#Compile-time_import

If you wish to use external css in your project without bringing it
into your code you will have to use the method of adding 'stylesheet
src=css-url /' to your gwt.xml file.

On Jul 24, 9:59 pm, asianCoolz second.co...@gmail.com wrote:
 hi, does this line

 @import url(http://fonts.googleapis.com/css?family=Lobster);
 inside  test.css
   ui:style src=test.css /
 suppported in uibinder?

 when i run on browser and look at the obfuscated css file, it didnt
 have the line @import url(http://fonts.googleapis.com/css?
 family=Lobster);  ? is it ignored/skipped by uibinder?

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Re: GWT app looks ugly in IE6

2010-07-23 Thread lineman78

One little trick you can use is use firebug to inspect the table you
want to experiment with and copy it's html to a flat html file and
open the html file with IE and play around with it till you get it
right.  The trick is to get the html how you want it, then roll the
changes into the java code using the DOM API.  There are many little
tricks you can perform to get IE to layout tables correctly and
without actually seeing the table html I can give you 2 suggestions:

1)
FlexTable.setCellPadding(0);
FlexTable.setCellSpacing(0);

2) !!Only do this if you are not using percentages for column widths
or row heights anywhere in the table.
FlexTable.getElement().getStyle().setProperty(tableLayout, fixed);
http://blogs.msdn.com/b/ie/archive/2005/02/10/370721.aspx
http://msdn.microsoft.com/en-us/library/ms531161.aspx

Another thing that can sometimes have an effect on how tables behave
in IE is DOCTYPE.  Google recomends standards mode for their
LayoutPanels and sometimes quirks mode can help(if you aren't using
layout panels).

On Jul 22, 8:30 pm, Magnus alpineblas...@googlemail.com wrote:
 Hi Lineman!

  Make sure you specifically set cellpadding and cellspacing to
  0 (IE assumes non-zero for one of these, don't remember which).

 I already found out something: First, I only set the margin/padding
 values to 0 in the Java code, wich worked on browsers other than IE6.
 Then, I *also* set them to 0 in the stylesheet, and not it looks a
 little bit less ugly. :-)

  The way that IE calculates table layout is
  significantly different than the other browsers in some cases and I
  think that with fairly minimal tweaking you will be able to fix these
  issues.

 Ok, but how can I find all the other tweaks? I found the one above,
 but I am no CSS specialist.
 I want to avoid trying a lot of things without plan and pumping up my
 CSS...

 Magnus

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Re: GWT app looks ugly in IE6

2010-07-22 Thread lineman78

GWT does not promise that all renderings look the same, but instead
gives you the tools to do so efficiently. For example, IE does not
render borders around empty cells in a table, but FF and webkit do.
It is up to you to set the CSS to tell IE to also render them. The IE
widgets do promise to do what they can to make them behave
consistently across browsers and provide the most efficient
implementation, but the only thing that promises consistent rendering
is the new layout panels. It is up to you to write the CSS for all
the browser quirks. The way that IE calculates table layout is
significantly different than the other browsers in some cases and I
think that with fairly minimal tweaking you will be able to fix these
issues. Make sure you specifically set cellpadding and cellspacing to
0 (IE assumes non-zero for one of these, don't remember which).

On Jul 22, 12:03 pm, Brett Thomas brettptho...@gmail.com wrote:
I think it looks classy to display a note for IE6 users that says something
along the lines of unfortunately our website no longer supports IE6, click
here to learn how to upgrade

I think plenty of people have no idea what browser version they are using.
They may know the difference between IE and Firefox, but not what version
number it is. If a site doesn't work, they'll just say must be because my
computer is old and forget about it. So, tell them what they can do to fix
it...

On Thu, Jul 22, 2010 at 2:00 PM, charlie charlie.f...@gmail.com wrote:
Agreed. It's been the bane of web developers existence for far too long.

On Thu, Jul 22, 2010 at 12:44 PM, Christian Goudreau
goudreau.christ...@gmail.com wrote:

Let's drop IE6 and IE7 support, I think it's time anyway for that.

On Thu, Jul 22, 2010 at 1:42 PM, Isaac Truett itru...@gmail.com wrote:

GWT doesn't promise to make your application look the same on all
browsers. It does try its very best to make sure that the JS it produces
functions the same across browsers, and doesn't leave any nasty side
effects, leak memory, or anything like that.

There may be some cases where GWT will leverage CSS tricks on each
browser to achieve a result (although I can't think of any such cases off
the top of my head), but that doesn't mean that GWT will take steps to
ensure that all of your CSS is magically transformed into something that
works on any browser. For one thing, that's out of scope, and for another
it
isn't possible. Some things in CSS just aren't supported, especially in
older browsers.

On Thu, Jul 22, 2010 at 1:35 PM, Magnus
alpineblas...@googlemail.comwrote:

Hi,

sorry for repeating:

I thought that the promise of GWT was that one never ever has to deal
with such problems anymore?

Why are we discussing about wether to spent time in supporting IE6
while the GWT compiler should do this?

Magnus

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Re: Gradients in css3

2010-07-22 Thread lineman78

You have to escape the beginning dash.  Here is from my cssResource:

@external gwt-Button, gwt-PushButton, gwt-ToggleButton;
.gwt-Button, .gwt-PushButton, .gwt-ToggleButton {
\-moz-border-radius: 3px;
\-webkit-border-radius: 3px;
}

On Jul 22, 11:17 am, Jyaif jfgeye...@gmail.com wrote:
 Hi,
 Is it possible to add gradients using css in GWT? I have tried adding
 gradient with css, with java, directly into the UIBinder xml, but
 nothing works. I know my browser supports it because I can fill a
 simple static div.

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Re: GWT app looks ugly in IE6

depends on your target audience.  The majority of IE6 users are either
enterprise or people who are running XP SP1.

On Jul 21, 10:11 am, Magnus alpineblas...@googlemail.com wrote:
 Hi,

 my GWT app works great under current browsers, but it looks ugly under
 IE6:http://www.lfstad-chess-club.de:8080/ics/

 Should I spent effort in finding out the reasons or isn't it worth the
 work?

 Thanks
 Magnus

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Re: file upload set filter

Well, first of all if you notice the link I posted earlier, none of
the browsers implement the spec. If you would like to do it anyway in
case they ever do, you will have to do a getElement and manually set
the property through the DOM API. Remember every GWT widget is just a
wrapper of an HTML element.

On Jul 20, 10:58 pm, aditya sanas 007aditya.b...@gmail.com wrote:
how to embed

form
input type=file name=pic id=pic accept=image/gif, image/jpeg /
/form

into gwt file upload...?
--
Aditya

On Wed, Jul 21, 2010 at 2:00 AM, lineman78 linema...@gmail.com wrote:
http://www.w3schools.com/TAGS/att_input_accept.asp

On Jul 20, 2:01 pm, Paachu binu...@gmail.com wrote:
Hi,

I need to upload one csv file into my application. I am using
FileUpload compontent to upload the File. But when I use FileUpload,
the FileUploadDialog displayed All files.. I need to set it
only for csv files . How can I set filter for that?

thanks
Paachu.

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Re: Send String from GWT TO PHP

There are examples around that are coppied directly from a book, I
believe it was GWT in Action.  If you are using GWT 2.0+ a JSONP API
was added...

http://google-web-toolkit.googlecode.com/svn/javadoc/2.0/com/google/gwt/jsonp/client/JsonpRequestBuilder.html


On Jul 21, 6:15 am, cokol eplisc...@googlemail.com wrote:
 hi, please see documentnation on RequestBuilder class, there is a good
 sample

 On 20 Jul., 20:20, bhargava bhargav...@gmail.com wrote:

  Hi all,

  I need to send a string from my gwt platform on glassfish to a website
  running(using php) on apache server.

  I know that i need to use JSONP .

  Is there any tutorial which can provide me a good idea on how to use
  json in gwt to send a string variable to another server?

  Thank you

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Re: XSL Transformation, AccessControlException, NoClassDefFoundError and SyntheticRepository