Re: Offline support for mobile devices
Thanks, I was aware of the project, but did not know that it supports the feature we 'alternatively' implemented. I hope they resolved the issue with Opera Mobile and Firefox we had. Will definitely check and compare against our version. Always great to have support from the community. Thanks again -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/YSi3LAZMbOMJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
No time is shown in ColumnDate
DateCell dateCell = new DateCell();
ColumnLog, Date dateColumn = new ColumnLog, Date(dateCell){
public Date getValue(Log log){
return log.getLog_dtm();
}
};
the return type is java.util.Date, but when output is UI, only date
portion is shown, what is the reason?
--
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-web-toolkit?hl=en.
Re: No time is shown in ColumnDate
DateCell uses DateTimeFormat.PredefinedFormat.DATE_FULL as default, see: http://google-web-toolkit.googlecode.com/svn/javadoc/2.4/com/google/gwt/cell/client/DateCell.html#DateCell() If your want a different format string you have to provide one using: http://google-web-toolkit.googlecode.com/svn/javadoc/2.4/com/google/gwt/cell/client/DateCell.html#DateCell(com.google.gwt.i18n.client.DateTimeFormat) -- J. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/h0Xel8G2-OEJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: No type for token
Thanks Brandon, I tied cleaning and GWT compile just in case (it did work
for getting request factory validation to work, once) but it didn't have
the desired effect. My request context is very similar to the one you
linked, the difference is I used only RequestT for all my method
invocations, not the InstanceRequestT, T. Here's the code bit:
@ServiceName(value = com.masteriti.manager.server.access.PersonDao,
locator =
com.masteriti.manager.server.locator.DaoServiceLocator)
public interface PersonRequest extends RequestContext {
RequestListPersonProxy listAll();
RequestVoid save(PersonProxy person);
RequestPersonProxy saveAndReturn(PersonProxy person);
RequestVoid delete(PersonProxy person);
}
The other thing I noticed looking around demo source code is that hardly
anyone uses @Embedded objects in their entities. Even the DynaTableRF
source doesn't use the @Embedded notation as shown in Google's RequestFactory
Tutorialhttp://code.google.com/webtoolkit/doc/latest/DevGuideRequestFactory.html#valueProxies,
instead it simply has
private Address address = new Address();
I'll try that today and see if it works, but any other suggestions would be
welcome!
Marco
--
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To view this discussion on the web visit
https://groups.google.com/d/msg/google-web-toolkit/-/xkDH2eCm9dcJ.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-web-toolkit?hl=en.
Re: GWT in enterprise systems (SAP, AS/400)
Hi Dominik: Very impressive! Good luck w/ these projects. It's great to see how the legacy and current technologies work together. Cheers, jec On 2012-02-19, dominikz dominik.zalew...@gmail.com wrote: Dear developers, I'm using GWT in combination with SAP and IBM's AS/400 (aka IBM i) systems. I thought that this topic may be interesting for some of you. Please see the attachment. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/rJdyAFa2clcJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: No type for token
Several things: - InstanceRequest vs. Request doesn't matter - Your AddressProxy is obviously referenced from PersonProxy (I suppose you have a getter in addition to the setter?) - The DynaTableRf doesn't use JPA or JDO or whatever, it stores everything in-memory, so it doesn't need any annotation on the domain objects. http://code.google.com/p/listwidget/ (by David Chandler, Google Developer Advocate for GWT) uses EntityProxy and ValueProxy if you want some example with an @Embedded annotation (if that can reassure you), it's the @Embedded annotation from Objectify though, not JPA or JDO. - I suppose your AddressProxy is a ValueProxy? - Annotation processing in Eclipse a barely usable. I battled for hours yesterday to make it refresh the generated DeobfuscatorBuilder. IIRC, I refresh the project in eclipse, then restarted it, then disabled annotation processing, deleted the .apt_generated folder and re-enabled annotation processing. If you can use Maven for your project, then I'd bet it works much better there! (I had the issue on the gwt-user project itself, so it wasn't an option for me) Next time, I'll try setting up a build action (or whatever) to run javac -proc:only instead of relying of Eclipse's built-in (and awfully buggy) APT. - If it's not an issue with Eclipse's annotation processing but rather with GWT, try launching the ValidationTool (or javac) on your classes, it'll log issues with your classes that makes it exclude them from the generated DeobfuscationBuilder. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/MPS4CqU9o-EJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: No type for token
On Monday, February 20, 2012 9:29:54 AM UTC-5, Thomas Broyer wrote: Several things: - Annotation processing in Eclipse a barely usable. I battled for hours yesterday to make it refresh the generated DeobfuscatorBuilder. IIRC, I refresh the project in eclipse, then restarted it, then disabled annotation processing, deleted the .apt_generated folder and re-enabled annotation processing. If you can use Maven for your project, then I'd bet it works much better there! (I had the issue on the gwt-user project itself, so it wasn't an option for me) Next time, I'll try setting up a build action (or whatever) to run javac -proc:only instead of relying of Eclipse's built-in (and awfully buggy) APT. Thanks for the reply, Thomas. This item did the trick. Following your procedure to refresh the project took care of the No type for token... error. The code now runs without errors although its still not saving addresses, but at least I'll have an opportunity to debug it in my code. I've never used maven, and have been resistant to adding more new stuff on my plate, but I may have to at this point. Thanks -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/yPhwdjkGGU8J. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
GWT.create - why the ? wildcard?
I've just been caught out by a ClassCastException from GWT.create, it
turned out to be a simple copy/paste fail when writing unit tests but
it got me thinking.
How come GWT.create is defined like so -
public static T T create(Class? classLiteral) {
instead of like so -
public static TArg, TRet extends TArg TRet create(ClassTArg
classLiteral) {
?
Chris
--
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-web-toolkit?hl=en.
Re: GWT strange code generation on float numbers
My guess is it's because .01 cannot be expressed exactly as a float. Like base 10 cannot express 1/3, IEEE floats have trouble with 1/10 and derivatives. Steve On Feb 8, 9:54 am, Andrey Korzhevskiy a.korzhevs...@gmail.com wrote: Hello everyone, I found interesting issue. Suppose I have this java code: float f = 0.01f; someFunc(f) which is generated by GWT into js code, something like that someFunc(9.9534e-7) So my question is: if GWT sees constant in code why it processes this constant so strange? I expect to see in generated js this call: someFunc(0.01) Is there some complex float numbers processing in gwt-dev? Thank you, Andrew -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: GWT in enterprise systems (SAP, AS/400)
Hi Dominik, I read the PDF and i'd like to tell you that i do the same on the AS400. You can embed a JAVA library into your project, containing anything you need to communicate with RPG programs on the iSerie. If you add this library into your GWT project, it's even more easy and fun. You can also add the library into Android device project. ( i didn't test yet ). For SAP, there is also a big Java API library you can use to talk to ABAP pgm, or directly to SAP data. (*) for iSerie - Have a look at this library : http://jt400.sourceforge.net/ ( open source version ) You can find it (IBM production version ) directly on your AS400 : jt400native.jar if you setup the right PTF for Java support. Today, i connect to OS400 from my Android Phone or Tablet with a tn5250 terminal emulator from anywhere. It was just a notice. I'm really interrested by your work. Thanks. Regards. Karim Duran 2012/2/19 dominikz dominik.zalew...@gmail.com Dear developers, I'm using GWT in combination with SAP and IBM's AS/400 (aka IBM i) systems. I thought that this topic may be interesting for some of you. Please see the attachment. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/rJdyAFa2clcJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: GWT.create - why the ? wildcard?
Because of GWT-RPC: MyServiceAsync service = GWT.create(MyService.class); MyServiceAsync doesn't extend MyService, they technically have no relationship at all, they're only tied together by a naming rule. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/_IRRvy9La8kJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: GWT strange code generation on float numbers
On 2/20/2012 7:46 AM, Steve wrote: My guess is it's because .01 cannot be expressed exactly as a float. Like base 10 cannot express 1/3, IEEE floats have trouble with 1/10 and derivatives. Steve Yes, that's right, 0.01f is not exactly representable with an IEEE floating point number. I suspect that the OP's original 9.9534e-7 is the closest a 64 bit FP number can get to 0.01f. Its one reason why you must be very careful with expressions like: if (fpnumber == 0.01f) then And, of course, the original java.lang.Float gets converted to a JS equivalent which is (almost) the same as a java.lang.Double in JS - but will still have the same precision when emulated in hosted mode - so, beware! In my code I rarely, if ever, use floats anymore, especially if I think that they are going to be used in GWT. The issues of additional serialization payload are best solved by compression. Alan On Feb 8, 9:54 am, Andrey Korzhevskiya.korzhevs...@gmail.com wrote: Hello everyone, I found interesting issue. Suppose I have this java code: float f = 0.01f; someFunc(f) which is generated by GWT into js code, something like that someFunc(9.9534e-7) So my question is: if GWT sees constant in code why it processes this constant so strange? I expect to see in generated js this call: someFunc(0.01) Is there some complex float numbers processing in gwt-dev? Thank you, Andrew -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: GWT in enterprise systems (SAP, AS/400)
Dear Karim, I'm very aware of jt400 library. I've done tons of things with that over a couple of past years. One problem with it is that it does not support everything you'd like to do with AS/400. The other is that it's performance is dreadful. Trust me, I checked it, even had lectures about it during conferences. I wouldn't even be going near RPG (since I'm java programmer) if the performance of jt400 wasn't so bad. The same is with JCo library on SAP. You need to run Java server in order to use it. And it's efficiency is also dreadful. Not even mentioning that if you look at its source code, you'll start tearing your hair out of your head. They've put there one class with dozens of static methods. One library with one class that is 1500 lines long. A nightmare. One more fact against Java is that you need to have java server to run it (WebSphere or Tomcat). And admins of AS400 don't like java since when they hear java they think 'WebSphere' which is a total mess. But this is another conversation I don't want to start here. The same is with SAP guys. When they hear 'Java', they run away in anger. Anyway going back to the original point, the whole idea is NOT TO USE JAVA AT ALL IN RUNTIME. This is how you should look at the PDF I've sent. Other than the above I really appreciate your answer :) -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/ETFpZEtuiGEJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: GWT.create - why the ? wildcard?
Thanks, I haven't looked into GWT-RPC since I did the tutorial so I'd forgotten about that use case. On Mon, Feb 20, 2012 at 4:09 PM, Thomas Broyer t.bro...@gmail.com wrote: Because of GWT-RPC: MyServiceAsync service = GWT.create(MyService.class); MyServiceAsync doesn't extend MyService, they technically have no relationship at all, they're only tied together by a naming rule. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/_IRRvy9La8kJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
MVP and RPC: What makes sense?
I'm still trying to get my head around this aspect of MVP: Where do I handle my RPC calls? Theory's answer seems to be in the Activity/ Presenter while simplicity's answer as often is in the View. I'm mindful of Thomas Broyer's comment, My rule of thumb: do what you think is best for you (http://groups.google.com/group/google-web- toolkit/msg/2b758d66dc1c13f0). The best answer to Activity/Presenter vs. View seems to be it depends. Here's the situation that arises in my current application: Within a View a user will open and edit a document. The document may be opened from the server through a list of available documents, from the local workstation though a FormPanel and FileUpload widget, or created new within my app (which may involve an optional image that is also selected via a FormPanel and FileUpload). In the case of the listing the server documents, it makes sense to Place to request the list as well as a Place that uniquely selects the document on the server. In either case I would ask the Activity to make the RPC call and the Activity/Presenter to tell the View display this. However in the case of a local file, the user selects the file within the View (the FileUpload) then clicks a submit button within the View (the FormPanel) that uploads the file. The upload's SubmitCompleteHandler triggers an RPC call to open the document from the server for display in the browser. In this case, why should the View tell the Presenter get the file and the Presenter the tell the view show this file. It seems to me that the steps from picking the local file through its display can be handled entirely--and more simply--within the View. Bringing the Presenter into it complicates the code. Another RPC that seems to belong solely with the View is one where the View needs information for display that can be calculated only on the server and that is not useful outside of the View. Examples might be image DPI, image color depth, or processing text files where a String returned from via RPC to the TextArea display might eat non-printing characters. In this case, why should the View ask the Presenter and the Presenter then update the View? Again, bringing the Presenter into it complicates the code. (As for testing, the heavy lifting is done server-side and the tests are performed on the server side.) Finally, an example not involving RPC that seems go belong solely within the View: Changing the state of one widget that enables/ disables or shows/hides other widgets. Yes, Presenters tell Viewers to display, but in this case why make the trip back and forth? The app's other Views don't care what is selected moment to moment, only what final generated object is. Thoughts? Comments? -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
No LayoutPanel.onResize() event on panel attach
Hello, I need a panel that lays out its children manually according it's current size. I did it changing onResize() method of LayoutPanel. The problem is that onResize() is not called initially when the panel is just attached, only when resized, and thus children sizes could not be set: when attaching getOffsetHeight() and getOffsetWidth() always return 0. Intercepting of onLoad() and onAttach() does not help. Is there any way to intercept an event when LayoutPanel aquires it's initial size? Antón -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: GWT strange code generation on float numbers
.01 can be expressed in JS floating number. The thing is not in IEEE and runtime number representation. The thing is in that literal constant should not be changed. I mean if in Java code I see 'float myNum = 0.01', I expect to see it in generated JS as 'var myNum = 0.01' -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/i999wNTvMx0J. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: MVP and RPC: What makes sense?
why should the View tell the Presenter get the file and the Presenter the tell the view show this file. Because : 1) Error handling, this complicates the logic. 2) Display independence. Useful if you go mobile or more usual, while you create a new version of the interface, you can have a stable version to ship updates. 3) Testability. It is easy to test blind logic. Good luck testing a view. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/cZUvmRZ6_rIJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Deploy GWT App to Tomcat - Validation Errors
I have a very small sample GWT application that I created as a proof of concept for my company. The goal was to use existing DAOs and Beans along with the RequestFactory to access and display data. It appears I am very close to getting this to work. I see the following in my tomcat log: SEVERE: Unexptected error java.lan.RuntimeException: The RequestFactory ValidationTool must be run for the com.ca.queueanagertoo.shared.QueueManagerToolRequestFactory RequestFactory type at com.google.web.bindery.requestfactory.vm.impl.Deobfuscator#Builder.load(Deobfuscator.java: 59).. I receive the following during compile from eclipse: Validating newly compiled units Errors in 'file:/C:/home/workspaces/harvest-indigo/ queueManagerTool/.apt_generated/com/ca/queuemanagertool/shared/ QueueManagerToolRequestFactoryDeobfuscatorBuilder.java' Line 7: No source code is available for type com.google.web.bindery.requestfactory.vm.impl.Deobfuscator.Builder; did you forget to inherit a required module? Line 9: No source code is available for type com.google.web.bindery.requestfactory.vm.impl.OperationKey; did you forget to inherit a required module? Line 10: No source code is available for type com.google.web.bindery.requestfactory.vm.impl.OperationData.Builder; did you forget to inherit a required module? Removing invalidated units Finding entry point classes I have seen comments that the eclipse error does not matter; however, the tomcat log seems to disagree. I have included the hibernate-validator-4.1.0.Final.jar in the WEB-INF/ lib directory. I have been working on this for two days. I need some assitance to move forward. Thanks. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: GWT in enterprise systems (SAP, AS/400)
Dear Dominikz*,* * * Ok, i understand that you don't want to use Java and i had a look at your PDF before my last answer. I agree with you : RPG native *pgm are fast. But there's some points i had to consider when i worked on projects i told you about. 1) You can use jt400 without any WebSphere or Tomcat. And i did client applications without these heavy gaz factory !!! You're right ! 2) Performance are not so bad if you tell the OS400 to pre-compile your Java pgm and use JIT ( just in time ) option. Don't use PDM option CRTJVPGM because you get bad performance. Instead, build the pgm in Rational studio and put it on IFS with FTP or client access. 3) I met situation where it wasn't possible to do simple things that i could do with jt400 in minutes : ( DATAQUEUE, OUTQUEUE, thread programming, generate PDF without using elephant infoprint service, and many others things) But, what i wanted exactly to tell you, is that i run directly native RPG PGM on os400 from my mobile device used as a java client, without any server ( even apache and CGI PGM) on AS. So it meets your idea. About SAP i'm not enough specialist and i trust you and your experience. Anyway, it was very interesting to talk with you, and i'd like to follow your project or posts about it. Hoping hear about you soon if you like. Regards. Karim Duran 2012/2/20 dominikz dominik.zalew...@gmail.com Dear Karim, I'm very aware of jt400 library. I've done tons of things with that over a couple of past years. One problem with it is that it does not support everything you'd like to do with AS/400. The other is that it's performance is dreadful. Trust me, I checked it, even had lectures about it during conferences. I wouldn't even be going near RPG (since I'm java programmer) if the performance of jt400 wasn't so bad. The same is with JCo library on SAP. You need to run Java server in order to use it. And it's efficiency is also dreadful. Not even mentioning that if you look at its source code, you'll start tearing your hair out of your head. They've put there one class with dozens of static methods. One library with one class that is 1500 lines long. A nightmare. One more fact against Java is that you need to have java server to run it (WebSphere or Tomcat). And admins of AS400 don't like java since when they hear java they think 'WebSphere' which is a total mess. But this is another conversation I don't want to start here. The same is with SAP guys. When they hear 'Java', they run away in anger. Anyway going back to the original point, the whole idea is NOT TO USE JAVA AT ALL IN RUNTIME. This is how you should look at the PDF I've sent. Other than the above I really appreciate your answer :) -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/ETFpZEtuiGEJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
why hasn't GWT an interface for Node or Element?
In some use cases,we do need it. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
MVP event generation
Hello ,
I am working on a MVP project. I want to generate an event when the
user clicks on the FlexTable cell. So using the MVP pattern i have
created a event class and its corresponding handler interface in the
event package. And the following way i fired the event. I want anyone
of you to tell me is this the correct way of generating events and i
am getting exceptions when i am implementing some what to do code on
the successful event generation
The code below shows the event firing when the user clicks on the
cell of the FlexTable
table.addTableListener(new TableListener() {
@Override
public void onCellClicked(SourcesTableEvents sender,
int row, int
cell) {
eventBus.fireEvent(new ChartEvent());
}
});
Suppose i want to generate a chart when the user clicks on the
cell ,i would be writing the code for that like this
eventBus.addHandler(ChartEvent.TYPE, new
ChartEventHandler() {
@Override
public void ChartEvent(ChartEvent event) {
Window.alert(event created );
DialogBox db=new DialogBox();
db.setWidget( (IsWidget) new
ChartGenericPresenter(rpcService,eventBus,new LineView()));
db.show();
}
});
}
Where ChartGenericPresenter is the presenter and LineView() is its
view. I am getting the following exception while i am using this
com.google.gwt.event.shared.UmbrellaException: One or more exceptions
caught, see full set in UmbrellaException#getCauses
at
com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:
129)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:124)
at
com.google.gwt.event.dom.client.DomEvent.fireNativeEvent(DomEvent.java:
116)
at com.google.gwt.user.client.ui.Widget.onBrowserEvent(Widget.java:
172)
at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1321)
at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1277)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:
167)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:
326)
at
com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:
207)
at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:
132)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:
561)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:
269)
at
com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:
91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:214)
at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:
167)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:
281)
at
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:
531)
at
com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:
352)
at java.lang.Thread.run(Unknown Source)
Caused by: com.google.gwt.event.shared.UmbrellaException: One or more
exceptions caught, see full set in UmbrellaException#getCauses
at
com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:
129)
at com.dotentreprise.pulsev1.client.view.SystemStatusDisplay
$1.onCellClicked(SystemStatusDisplay.java:96)
at com.google.gwt.user.client.ui.ListenerWrapper
$WrappedTableListener.onClick(ListenerWrapper.java:713)
at
com.google.gwt.event.dom.client.ClickEvent.dispatch(ClickEvent.java:
54)
at
com.google.gwt.event.dom.client.ClickEvent.dispatch(ClickEvent.java:1)
at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1)
at
com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:
193)
at
Re: MVP event generation
Yeah that helped me to display the DialogBox when the user clicks on
the cell. i have used like this
db.setWidget(new LineView());
Now the DialogBox is displaying but i am creating a chart in the
LineView() with database records. That chart is not coming. But when i
simply use by passing a token like this in the AppController (not
using any click event ,just passing the token chart ) ,it works
if (token.equals(chart)) {
presenter = new
ChartGenericPresenter(rpcService,eventBus,new
LineView());
If i use the above code. The chart will come in the DialogBox. But
unfortunately i want to display the chart depending on the user event.
So like you said i used db.setWidget(new LineView());
And now DialogBox is showing but no chart inside
On Feb 21, 11:16 am, Alfredo Quiroga-Villamil laww...@gmail.com
wrote:
It seems as if the call:
*db.setWidget((IsWidget) new ChartGenericPresenter(rpcService,eventBus,new
LineView()));*
is not accurate. You are passing to a DialogBox, which is ultimately
extending SimplePanel, a presenter and not a widget. The flow would be more
or less as follows:
1. Instantiate the view.
2. Instantiate your presenter.
3. Set the presenter on your view.
4. Add the view to your widget (DialogBox) in this case.
Regards,
Alfredo
On Tue, Feb 21, 2012 at 12:09 AM, Nitheesh Chandran
nithe...@dotentreprise.com wrote:
Hello ,
I am working on a MVP project. I want to generate an event when the
user clicks on the FlexTable cell. So using the MVP pattern i have
created a event class and its corresponding handler interface in the
event package. And the following way i fired the event. I want anyone
of you to tell me is this the correct way of generating events and i
am getting exceptions when i am implementing some what to do code on
the successful event generation
The code below shows the event firing when the user clicks on the
cell of the FlexTable
table.addTableListener(new TableListener() {
@Override
public void onCellClicked(SourcesTableEvents
sender, int row, int
cell) {
eventBus.fireEvent(new ChartEvent());
}
});
Suppose i want to generate a chart when the user clicks on the
cell ,i would be writing the code for that like this
eventBus.addHandler(ChartEvent.TYPE, new
ChartEventHandler() {
@Override
public void ChartEvent(ChartEvent event) {
Window.alert(event created );
DialogBox db=new DialogBox();
db.setWidget( (IsWidget) new
ChartGenericPresenter(rpcService,eventBus,new LineView()));
db.show();
}
});
}
Where ChartGenericPresenter is the presenter and LineView() is its
view. I am getting the following exception while i am using this
com.google.gwt.event.shared.UmbrellaException: One or more exceptions
caught, see full set in UmbrellaException#getCauses
at
com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:
129)
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:124)
at
com.google.gwt.event.dom.client.DomEvent.fireNativeEvent(DomEvent.java:
116)
at com.google.gwt.user.client.ui.Widget.onBrowserEvent(Widget.java:
172)
at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1321)
at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1277)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.jav
a:
167)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingFo
rReturn(BrowserChannelServer.java:
326)
at
com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChann
elServer.java:
207)
at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:
132)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:
561)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:
269)
at
com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.j
ava:
91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:214)
at
[gwt-contrib] Synchronous RPC
(Author of openwaf.com)
Using asynchronous RPC (GWT.runAsync) forces developer to split there code
int two parts. It becomes difficult if you want to do some sequential RPC .
I understand Single threaded browser architecture wont allow us to easily
execute synchronous RPC.
For example to get time from the server using RPC code looks time below
TimerService.getTime(new AsyncCallbackString() {
public void onSuccess(String result) {
lblASync.setText(lblASync.getText()+Result 1:+result+br/);
}
public void onFailure(Throwable caught) {
}
});
Here response code goes in onSuccess method.
Just for example we want to get the server time twice synchronously. code
will look like this
**
*TimerService.getTime(new AsyncCallbackString() {*
public void onSuccess(String result) {
lblASync.setText(lblASync.getText()+Result 1:+result+br/);
* TimerService.getTime(new AsyncCallbackString() {*
public void onSuccess(String result) {
lblASync.setText(lblASync.getText()+Result
1:+result+br/);
}
public void onFailure(Throwable caught) {}
});
} public void onFailure(Throwable caught) {} });
Code looks complicated now. Now imagine if we can write simple code like
below.
lblSync.setText(lblSync.getText()+Result
1:+TimerService.getTime()+br/);
lblSync.setText(lblSync.getText()+Result
2:+TimerService.getTime()+br/);
Which does the same thing of the code above this.
I found a workaround for this. We can simulates synchronous RPC using
asynchronous http requests. Where program is *logically* blocked till you
receive any response from the server.
This is well tested for statements like for,while,if else.
Here compiler takes care of the generating some additional code which will
return from the function when RPC is made and resume the code at
appropriate location where it was blocked.
For more details please check http://openwaf.com/ExRPCSyncAsync.jsp
http://openwaf.com
You can have a quick look at code below to find a difference
public class ExRPCSyncAsync extends WAFController{
@ViewElement
public Button btnSync;
@ViewElement
public Button btnASync;
@ViewElement
public Label lblSync;
@ViewElement
public Label lblASync;
public ExRPCSyncAsync(){
btnSync.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
startSyncCalls();
}
});
btnASync.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
startASyncCalls();
}
});
}
public void startSyncCalls(){
lblSync.setText();
lblSync.setText(lblSync.getText()+Call 1br/);
lblSync.setText(lblSync.getText()+Result
1:+TimerService.getTime()+br/);
lblSync.setText(lblSync.getText()+Call 2br/);
lblSync.setText(lblSync.getText()+Result
2:+TimerService.getTime()+br/);
lblSync.setText(lblSync.getText()+Call 3br/);
lblSync.setText(lblSync.getText()+Result
3:+TimerService.getTime()+br/);
lblSync.setText(lblSync.getText()+Call 4br/);
lblSync.setText(lblSync.getText()+Result
4:+TimerService.getTime()+br/);
}
public void startASyncCalls(){
lblASync.setText();
lblASync.setText(lblASync.getText()+Call 1br/);
TimerService.getTime(new AsyncCallbackString() {
public void onSuccess(String result) {
lblASync.setText(lblASync.getText()+Result 1:+result+br/);
}
public void onFailure(Throwable caught) {}
});
lblASync.setText(lblASync.getText()+Call 2br/);
TimerService.getTime(new AsyncCallbackString() {
public void onSuccess(String result) {
lblASync.setText(lblASync.getText()+Result 2:+result+br/);
}
public void onFailure(Throwable caught) {}
});
lblASync.setText(lblASync.getText()+Call 3br/);
TimerService.getTime(new AsyncCallbackString() {
public void onSuccess(String result) {
lblASync.setText(lblASync.getText()+Result 3:+result+br/);
}
public void onFailure(Throwable caught) {}
});
lblASync.setText(lblASync.getText()+Call 4br/);
TimerService.getTime(new AsyncCallbackString() {
public void onSuccess(String result) {
lblASync.setText(lblASync.getText()+Result 4:+result+br/);
}
public void onFailure(Throwable caught) {}
});
}
}
--
http://groups.google.com/group/Google-Web-Toolkit-Contributors
Re: [gwt-contrib] Synchronous RPC
On Mon, Feb 20, 2012 at 4:05 AM, Deepak Patil deepakpati...@gmail.comwrote:
(Author of openwaf.com)
Using asynchronous RPC (GWT.runAsync) forces developer to split there code
int two parts. It becomes difficult if you want to do some sequential RPC .
BTW, runAsync is totally different from RPC -- it is about code splitting,
so only the code needed for the initial app is downloaded in the initial
download.
I understand Single threaded browser architecture wont allow us to easily
execute synchronous RPC.
For example to get time from the server using RPC code looks time below
TimerService.getTime(new AsyncCallbackString() {
public void onSuccess(String result) {
lblASync.setText(lblASync.getText()+Result
1:+result+br/);
}
public void onFailure(Throwable caught) {
}
});
Here response code goes in onSuccess method.
Just for example we want to get the server time twice synchronously. code
will look like this
**
*TimerService.getTime(new AsyncCallbackString() {*
public void onSuccess(String result) {
lblASync.setText(lblASync.getText()+Result 1:+result+br/);
* TimerService.getTime(new AsyncCallbackString() {*
public void onSuccess(String result) {
lblASync.setText(lblASync.getText()+Result
1:+result+br/);
}
public void onFailure(Throwable caught) {}
});
} public void onFailure(Throwable caught) {} });
Code looks complicated now. Now imagine if we can write simple code like
below.
lblSync.setText(lblSync.getText()+Result
1:+TimerService.getTime()+br/);
lblSync.setText(lblSync.getText()+Result
2:+TimerService.getTime()+br/);
Which does the same thing of the code above this.
I found a workaround for this. We can simulates synchronous RPC using
asynchronous http requests. Where program is *logically* blocked till you
receive any response from the server.
This is well tested for statements like for,while,if else.
Here compiler takes care of the generating some additional code which will
return from the function when RPC is made and resume the code at
appropriate location where it was blocked.
For more details please check http://openwaf.com/ExRPCSyncAsync.jsp
http://openwaf.com
The web site doesn't give implementation details, but I assume it is by
rewriting the synchronous call to be continuation-passing. Ie:
function f() {
block1;
x1 = asyncCall1();
block2;
while (asyncCall2()) {
block3;
}
return retval;
}
gets rewritten to:
function f(retCallback) {
block1;
asyncCall1(function(x1) {
block2;
loop = function(val) {
if (val) {
block3;
asyncCall2(loop);
} else {
retCallback(retval);
}
};
asyncCall2(loop);
}
}
The problem with doing this in general is that basically every call in the
app has to be rewritten in this form (if any of them might ever call an
async method), and you wind up with stack depth problems unless the VM has
tail-call elimination (which JS doesn't).
Chaining of async calls is awkward, and I don't think it is a solved
problem yet.
--
John A. Tamplin
Software Engineer (GWT), Google
--
http://groups.google.com/group/Google-Web-Toolkit-Contributors
