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• GWT Date Picker Format problem when saving a java date through hibernate in postgresql

  - by Noor

  Hi, I am using Java Date and Hibernate which is then being saved in the database (Postgresql). I am not that good in hibernate Part of the Mapping File <property name="DateOfBirth" type="java.util.Date"> <column name="DATEOFBIRTH" /> </property> I am using GWT Date picker Short date format i.e. yyyy-MM-dd. I am getting the value from the date picker using View.getUserDateOfBirth().getValue() But when I am saving the date 2010-11-30 into the datebase it is saving it as 2010-11-30 00:00:00 instead of 2010-11-30 So, I want it to be saved in the database as in this format 2010-11-30?? I have many things such timestamp but i not being able to configure it. I think this part <property name="DateOfBirth" type="java.util.Date"> <column name="DATEOFBIRTH" /> </property> should be changed but I do not know what to change

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• File Upload in GWT in a Special Case

  - by Maksud

  I am doing a software for a document system. In this system when a user completes a document and want to save it, the document will be uploaded directly to server without the user action. This system uses COM/ActiveX to facilitate user using native editors. Ok, my problem is: suppose I have a file say d:/notepad.txt. Using classical method a user can browse the file and upload it. I can do that with apache commonio and GWT FormPanel and FileUpload. But if I know the filename (d:/notepad.txt), is there any way to upload the file directly to server without the user having to browse the file. I am currently doing this by the ActiveX componenet calling some HttpUpload methods with POST. But that does not maintain session. Thanks

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• GWT AbstractColumnDefinition (Need to add style to certain Columns)

  - by Mario

  I have a column Definition for each colume that extends AbstractColumnDefinition these columns are put in a DefaultTableDefinition. example: NAME | SIZE | RES | DELETE | this style (AT THE END OF THE PAGE ) is added to the column names if you notice all of them are with a cursor pointer , meaning a hand shows up when i hover above each one. my question is would I be able to remove the coursor for delete or in general for a certain column and keeping it for another one .. i tried to do that with each column Definition but there is no such thing as remove or addstyle even to like put my own style. THANK YOU .gwt-ScrollTable .headerTable td { border-bottom:1px solid black; border-left:1px solid #CCCCCC; border-right:1px solid #CCCCCC; cursor:pointer; vertical-align:bottom; }

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• Keeping iPhone application in sync with GWT application.

  - by Reflog

  Hi, I'm working on an iPhone application that should work in offline and online modes. In it's online mode it's supposed to feed all the information the user enters to a webservice backed by GWT/GAE. In it's offline mode it's supposed to store the information locally, and when connection is available sync it up to the web service. Currently my plan is as follows: Provide a connection between an app and a webservice using Protobuffers for efficient over-the-wire communication Work with local DB using Core Data Poll the network status, and when available sync the database and keep some sort of local-db-to-remote-db key synchronization. The question is - am I in the right direction? Are the standard patterns for implementing this? Maybe someone can point me to an open-source application that works in a similar fashion? I am really new to iPhone coding, and would be very glad to hear any suggestions. Thanks

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• Javascript instanceof & typeof in GWT (JSNI)

  - by rybz

  Hi, I've encountered an curious problem while trying to use some objects through JSNI in GWT. Let's say we have javscript file with the function defined: test.js: function test(arg){ var type = typeof(arg); if (arg instanceof Array) alert('Array'); if (arg instanceof Object) alert('Object'); if (arg instanceof String) alert('String'); } And the we want to call this function user JSNI: public static native void testx()/ *-{ $wnd.test( new Array(1, 2, 3) ); $wnd.test( [ 1, 2, 3 ] ); $wnd.test( {val:1} ); $wnd.test( "Some text" ); }-*/; The questions are: why instanceof instructions will always return false? why typeof will always return "object" ? how to pass these objects so that they were recognized properly?

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• Too slow gwt develpment mode !

  - by Ehsan Khodarahmi

  I'm using eclipse galileo with latest GWT 2.0 version in development mode, but it runs really slow (i should wait about 1 minute to open one page, but after compilation, my application works very well when I run it using tomcat 5.5). My code is not too heavy & i guess there is an os-related or software inconsistency problem, because I'd this problem before, but when i reinstalled my windows vista sp2 (I formatted my windows drive & reinstalled it), my problem solved for just some days & then again it became to slow ! I didn't install any special software on my windows, so i really dont know why this problem occures ??? any suggestion ?

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• summer experiment: GWT & python for a trading game- arch question

  - by sadhu_

  Hi, As a summer learning experiment, I'm thinking of coding up a web front end for a trading game i wrote in python, that generates share prices and random snippets of text. I am sort of struggling with how this should work on the back-end though. I'd rather have my GWT client page interact with the python share price generator, than to try and re-code it in java. I suppose i could use an sqlite db, and then use jdbc to pick up the prices, but i was wondering if there is a better way, for me to be able to poll some python script either from my client page, or from the serverside java code ? I found this python wrapper, but i'm not sure how i could use it though: http://code.google.com/apis/visualization/documentation/dev/gviz_api_lib.html Thanks.

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• Detecting GWT RichTextArea 'dirty' state

  - by David

  I want to detect when the contents of my GWT RichTextArea become 'dirty' (have been changed by the user) in order to enable a 'save' button accordingly. I suppose I could listen for key presses that are likely to have changed the contents; but browser support for key presses is notoriously quirky. I suppose I could, before editing begins, save the original contents in a variable, and upon key press, compare the current contents against that variable, but doing that on each key press is going to be really slow. Is there some neat way to achieve RichTextArea dirty-detection?

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• question on regular servlets within GWT (working in dev mode ,not working in deployment in tomcat)

  - by molleman

  Hello guys, i am having trouble with my web application developed in GWT. the application allows users to upload and download using an upload servlet and a download servlet, the upload servlet was created using the gwtUpload library. the download servlet is using regular HTTPServlet. when i run the application within eclipse the download servlet works fine, when i deploy it to tomcat, when a user selects to upload a file, the file does not download, when a user selects a link to download a file, this error is returned type Status report message /testhibernategilead/downloadServlet description The requested resource (/testhibernategilead/downloadServlet) is not available. can anyone explain why this is

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• GWT HTML widget security risks

  - by h2g2java

  In GWT javadoc, we are advised If you only need a simple label (text, but not HTML), then the Label widget is more appropriate, as it disallows the use of HTML, which can lead to potential security issues if not used properly. I would like to be educated/reminded about the security susceptibilities? It would be nice to list the description of the mechanisms of those risks. Are the susceptibilities equally potent on GAE vs Amazon vs my home linux server? Are they equally potent across the browser brands? Thank you.

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• gwt not showing the right image

  - by arinte

  I have a gwt image object . In my code I set my visibleRect like this: btnSearch.setVisibleRect(-64,-80,16,16); So when I run my code with firebug the html looks like this: <img border="0" style="width: 16px; height: 16px; background: url(&quot;http://tempest/deltaflow/Content/Images/icon.png&quot;) no-repeat scroll 64px 80px transparent;" src="http://127.0.0.1:8888/trunkui/clear.cache.gif"> Why is the '-' left off? When I edit it with firebug to have the '-' it works fine.

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• How to set attribs in GWT?

  - by Jonas Byström

  I'm not getting any effect out of DOM.setElementAttribute, am I doing something wrong? class MyListBox extends com.google.gwt.user.client.ui.ListBox { .... protected void setHoverAutoWidth() { addDomHandler(new MouseOverHandler() { public void onMouseOver(MouseOverEvent event) { DOM.setElementAttribute(getElement(), "width", "auto"); } }, MouseOverEvent.getType()); addDomHandler(new BlurHandler(){ public void onBlur(BlurEvent event) { DOM.setElementAttribute(getElement(), "width", "100px"); } }, BlurEvent.getType()); } } (I know there are less hacky ways to change the width than to set the style attribute directly, but I don't care about css right now.) Edit: Oops, just realized that width does not change the style width, just adds a width attribute to the tag (which explains why nothing happens). Any suggestions on how to modify the style are still welcome!

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• Resolve HTTP 304 - not modified in AJAX call made via GWT

  - by Salvin Francis

  We are using an application made in GWT with the server as tomcat. The project runs fine normally, however there are situations where the server is restarted. At such point of time, the ajax call made by the code below returns blank text with the status code as 304 RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.POST, URL.encode(serverUrl)); //-- serverUrl is the url to which this call is posted to. requestBuilder.setHeader("Content-Type", "application/x-www-form-urlencoded"); requestBuilder.setHeader("Expires","0"); requestBuilder.sendRequest( postData, new RequestCallback() { public void onError(Request request, Throwable exception) { //Do nothing } public void onResponseReceived(Request request, Response response) { //sometimes when the server is restarted, I get response.getStatusCode() = 304 and the response.getText() as blank } } ); normally we get back some data from the server inside this response text. How do we now get the data when the response itself is blank ?

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• Wrapping pre-made elements using GWT?

  - by user246114

  Hi, I've been working with GWT for awhile, I can't find a way to integrate it with a preexisting website which is a real downer. My page content is already generated for me using jsp, like: <div id='A'></div> <div id='B'></div> etc. there is no way for me to do something like this though: public void onModuleLoad() { SimplePanel spA = new SimplePanel( Document.getElementById("A")); spA.add(new Label("hello")); SimplePanel spB = new SimplePanel( Document.getElementById("B")); spB.setWidth("200px"); etc .. } seems like there's no way to just wrap a pre-existing element. Is this true, or am I missing how to do this? I need be able to wrap a bunch of elements like this, to manipulate them later on. I see TextBox, Button, a few other classes have wrap() methods, however nothing like that exists for elements, Thanks

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• GWT HTMLTable colaspan feature

  - by Sanjay

  Hello all I am using HTMLTable of import com.google.gwt.user.client.ui.HTMLTable I instantiated it like below: HTMLTable table = new Grid(rows, col); Number of rows and columns are decided by the user input. Now I want to used colspan for the specific rows of the table. One way to this is apply css to the that specific row.But problem with this is that Number of column to span are decided by the user input, i.e It may vary every time. So by using css it is something like making it static. So I want to know the way through which I can do colspan on the rows of the table. and Number of column to span is different every time. Thanks in advance

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• Place GWT application on Jetty

  - by Noor

  Can someone help me to place my GWT application on Jetty. I am not using maven. I have libraries in my build path. First I am taking the war folder already exploded and copy it in jetty/webapps, then in folder context. I have placed a folde named BiddingSystem in folder web apps, it is an already exploded folder and not a .war file In folder jetty/context, there is a file test.xml I am renaming the file to BiddingSystem.xml and also editing content of BiddingSystem.xml, finally the content of BiddingSystem.xml is <?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure.dtd"> <configure class="org.mortbay.jetty.webapp.WebAppContext"> <set name="contextPath">/BiddingSystem</set> <set name="war"><systemproperty name="jetty.home" default="."/>/webapps/BiddingSystem</set> </configure> I am getting this error:

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• GWT celltable Simple pager Next and previous buttons

  - by Saritha

  I am working on a CellTable with a SimplePager. My paging works fine in the sense when i set the page size to be 5 only 5 records are being displayed. My question is that do next and previous buttons come by default or do we have to configure them. I have seen the show case example code and i do not see any external configurations . my SimplePager code is as follows: //create pager SimplePager.Resources resources = GWT.create(SimplePager.Resources.class); SimplePager simplePager = new SimplePager(TextLocation.CENTER, resources , false, 0, true); simplePager.setDisplay(cellTableSearchResults); simplePager.setPageSize(5); // create data provider ListDataProvider<GridDTO> dataProvider = new ListDataProvider<GridDTO>(); dataProvider.addDataDisplay(cellTableSearchResults); dataProvider.setList(components); Please help.

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• GWT Clipped image

  - by Kasturi

  I am creating a widget in which a portion of an image will be highlighted and the remaining portion will have an opacity 0.5. For this i am using two images. The full image at the back with opacity 0.5. the portion of the image i want to be highlighted in the front. the front image is GWT's Clipped image. I have a scenario where i have to resize the back image. Is there any way to resize the clipped image at the front?

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• GWT 100% height panel with scroll

  - by Andrey

  Hello! Could anyone help me make normal layout in GWT. I need a main panel which: fills all the browser space (100% height); if being collapsed too much shows scroll bars (autoscroll). When I use old layout (RootPanel, VerticalPanel) I have scroll, but can't get 100% height. When I use new layout (RootLayoutPanel, DockLayoutPanel) I get 100% height, but I don't get any scroll. And also I have some troubles in IE. Is there any sample showing how to achieve both goals? Thanks in advance!

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• gwt+xml- can i read through incomplete XML using the GWT XML Parser

  - by Arvind

  I have a requirement where a user is typing in XML in a text area, and I want to show the various nodes in a tree...But as the user is typing in the xml, it wont be a complete xml (since he is still typing in the XML)... How do I read an incomplete XML and correctly generate the tree? I understand how to read an xml and generate nodes in the tree, what I want to know is, how to read the incomplete XML as it is being typed in

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• Retrieve GWT radiobutton value in servlet

  - by Florian d'Erfurth

  Hi, I'm having a headache figuring how to retrieve the gwt Radio Buttons values in the server side. Here is my UiBinder form: <g:FormPanel ui:field="form"><g:VerticalPanel ui:field="fruitPanel"> <g:RadioButton name="fruit">apple</g:RadioButton> <g:RadioButton name="fruit">banana</g:RadioButton> <g:SubmitButton>Submit</g:SubmitButton> ... Here is how i initialize the form: form.setAction("/submit"); form.setMethod(FormPanel.METHOD_POST); So i though i would have to do this on the servlet: fruit = req.getParameter("fruit") But of course this doesn't work, parameter fruit doesn't exist :/ Edit: Ok i get parameter fruit but it's always "on" I also did try to add the radio button in java with: RadioButton rb0 = new RadioButton("fruit", "apple"); RadioButton rb1 = new RadioButton("fruit", "banana"); fruitPanel.add(rb0); fruitPanel.add(rb1); So how should i do?

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• cxf jaxws with spring on gwt 2.0

  - by Karl

  Hi, I'm trying to use an application which uses cxf-jaxws in bean definition: <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:sec="http://cxf.apache.org/configuration/security" xmlns:jaxws="http://cxf.apache.org/jaxws" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://cxf.apache.org/configuration/security http://cxf.apache.org/schemas/configuration/security.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.0.xsd"> however in combination with the jetty from gwt 2.0 development shell my context doesn't load and I get this exception: org.springframework.web.context.ContextLoader: Context initialization failed org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://cxf.apache.org/jaxws] enter code hereOffending resource: class path resource [bean_definition.xml] My project is maven-based and I got cxf-rt-frontend-jaxws which contains the namespacehandler and spring.handlers on the classpath. I added cxf-transports-http-jetty.jar as well. Has anyone experienced this kind of problem and found a solution? It seems to be a classpath issue, added the cxf-rt-frontend-jaxws.jar by hand and it works... Somehow the maven dependency doesn't get added to the classpath. Thanks in advance, karl

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• Technology Selection for a dynamic product

  - by Kuntal Shah

  We are building a product for Procurement Domain in JAVA. Following are the main technical requirements. Platform Independent Database Independent Browser Independent In functional requirements the product is very dynamic in nature. The main reason being the procurement process around the world is different from client to client. Briefly we need to have a dynamic workflow engine and a dynamic template engine. The workflow engine by which we can define any kind of workflows and the template engine allows us to define any kind of data structures and based on definition it can get the user input through workflow. We have been developing this product for almost 2 years. It has been a long time till we can get down with the dynamics of requirements. Till now we have developed a basic workflow and template engine and which is in use at one of the client. We have been using following technologies. GWT-Ext (Front End Framework) Hibernate (Database Layer) In between we have faced some issues with GWT-Ext (mainly browser compatibility) and database optimization due to sub classing in hibernate. For resolving GWT-Ext issue, which a dying community so we decided to move to SmartGWT. In SmartGWT we faced issues related to loading and now we are able to finalize that GWT 2.3 will be the way to go as the library is rich and performance is upto the mark. We are able to almost finalize GWT-Spring based front and middle layer. In hibernate, we found main issues with sub-classing due to that it was throwing astronomical queries and sometimes it would stop firing any queries for 5-10 seconds or may be around 30 seconds and then resume again. Few days back I came to one article related to ORM. I am a traditional .Net SQL developer and I have always worked with relational database. Reading through this article, I also found it relating to the issues I face. I am still not completely convinced of using hibernate and this article just supported my opinion. Following are the questions for which I am looking for an answer. Should we be going with Hibernate in case of dynamic database requirements and the load of the data will be heavy in future? How can we partition the data, how we can efficiently join the data, how we can optimize the queries? If the answer is no then how do we achieve database independence? Is our choice related to GWT and Spring proper or do we need to change that too? Should we use any other key value pair database if the data is dynamic in nature and it is very difficult to make it relational?

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• GWT forced height HTMLPanel

  - by Nils

  Hello, I'm developing a GWT project, and I encountered a problematic cross-browsering problem. When using firefox, there are problems with the display of all the pages. I found the reason why : In UIBinder, each of my pages are wrapped by a "g:HTMLPanel" : at start and at the end of the xml file, to wrap the content of all the pages When doing this, the generated code of the panel goes like this : div style="width: 100%; height: 100%; .... The problem is that "height : 100%". If I remove it with firebug, the display is perfect. So my goal is to programatically remove that generated 100% height.. But no way to do it ! I tried everything : setHeight, setSize, working on the Element itself with getElement().methods()... I tried to do things like style.clear(), everything that could have a chance to work.. But in the generated code that "height: 100%" will ALWAYS be there. If I set it's height to "50%" or "50px" it has no effect at all. I even tried to give it an ID, then with pure javascript to change it's style, but no solution either.. Note : I'm sure that I'm working on the right element : adding a styleName, for example, works well. Any idea ? Your help would be really appreciated, I have no clue of how to remove this bit of generated code, and I've been looking for hours already :(:(:(:( Best regards, Nils

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• GWT CssResource Customization

  - by Eric Landry

  I'm writing a GWT widget using UIBinder and MVP. The widget's default styles are defined in TheWidgetView.ui.xml: <ui:style type="com.widgetlib.spinner.display.TheWidgetView.MyStyle"> .textbox { border: 1px solid #red; } .important { font-weight: bold; } </ui:style> The widget's CssResource interface is defined in TheWidgetView.java: public class TheWidgetView extends HorizontalPanel implements TheWidgetPresenter.Display { // ... some code @UiField MyStyle style; public interface MyStyle extends CssResource { String textbox(); String important(); } // ... more code } I'd like the consumer of this widget to be able to customize part of the widget's styles and to have this in their MyExample.ui.xml: <ui:style type="com.consumer.MyExample.MyStyle"> .textbox { border: 2px solid #black; } </ui:style> And this be their MyExample.java: public class MyExample extends Composite { // ... some code @UiField MyStyle style; interface MyStyle extends TheWidgetView.MyStyle{ String textbox(); } // ... more code } Is there a way that my widget can have default styles, but that the consumer of the widget can override one of them? When an interface extends TheWidgetView.MyStyle, the of the widget consumer needs to define all the styles listed in that parent interface. I've seen some widget libraries have the widget's constructor take in a ClientBundle as parameter, which I suppose could apply to CssResource. Although, I'm not sure how I'd pass in this style object in a constructor invoked by UIBinder. Thanks much in advance!

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