gwt

问题 There are several questions on StackOverflow discussing the question of when one should use an assert statement versus throwing some exception. (Examples here, here, here, here, and here. However, I have come to suspect that the conventional wisdom of assert-versus-throw is based upon the assumption that you are running within a JVM. In the GWT universe, where your Java gets transliterated to JavaScript and runs in the context of a browser, the set of tradeoffs feels different: asserts are

问题 If I define my CellTable in MyView.ui.xml UiBinder file like this: <ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder' xmlns:g='urn:import:com.google.gwt.user.client.ui' xmlns:c="urn:import:com.google.gwt.user.cellview.client" ui:generateFormat='com.google.gwt.i18n.rebind.format.PropertiesFormat' ui:generateKeys='com.google.gwt.i18n.rebind.keygen.MD5KeyGenerator' ui:generateLocales='default' xmlns:p1="urn:import:com.google.gwt.user.cellview.client"> ... <g:HTMLPanel> <c:CellTable

问题 I am new to GWT and learning it via the the Google documents. How do I setup GWT with Tomcat? I am required to intergrate it with Tomcat for work purposes. 回答1: There is nothing special to do. You just have to compile your gwt project, and export the war folder to the Tomcats webapps folder. What IDE are you using? If you are using eclipse or similar, and a newer version of tomcat, just export the contents of the war folder as a regular zip archive. Then change the extension from .zip to .war

问题 I'm writing a small GWT front-end for a backend app and I was wondering about the best security model for GWT apps? I was thinking of implementing an RPC method that receives an MD5 of a user password from the client webpage, then passing back a session ID to the client page (or a failcode). All subsequent calls would simply use the session ID and the server would keep a track that the IP address for the session ID is the same IP address that created the session ID? Is this the standard

问题 Perhaps I haven't been searching the right way but I cannot figure out for the life of me how to center an element using GWT Layout Panels. I'm using UiBinder and I've tried all panels that implement HasVerticalAlignment (DockPanel, HorizontalPanel, VerticalPanel). None of them seem to have any impact from setting vertical alignment (or even horizontal). I've made sure they're taking 100% width and height, inspected the resulting DOM layout from my browser and nothing seems to be changed from

问题 In GWT 2.5 RC CellTableBuilder API was introduced but there are no comprehensive documentation available yet. Is there any tutorial\example of implementing on-demand custom row building with CellTableBuilder? The only example I've found so far was this one http://showcase2.jlabanca-testing.appspot.com/#!CwCustomDataGrid but it is quite confusing for me. So, my goal is to create extra row containing widget that provides details about clicked row in a table. 回答1: I've found suitable solution

问题 How is GWT (Google Web Toolkit)'s RPC (Remote Procedure Call)'s for Asynchronous operations from browser/javascript to server is DIFFERENT or SIMILAR when compared to the AJAX calls ? If they are different, could someone help me understand how they are different ? I also heard that this RPC implementation does not works with all Server containers. For example, the GWT project did not work in Apache Tomcat. Moreover, is this RPC a an custom implementation of Google , or is it a standard

问题 Original issue Since I changed the version from 1.6.3. to 1.6.4 I get serious performance problems working together with GWT in hosted mode. Update 18/04/2012 The issue is reproductible also in 1.6.4.1 in dev environment. By now the best is to downgrade to 1.6.3 Update 09/07/2012 According to Kris Giesing: This is still not fixed in 1.7.0. A request that takes 330ms to process in 1.4.3, and 415ms to process in 1.6.3, takes 13740ms to process in 1.7.0. That's from timing the Java analysis code

问题 I'm playing with GWT's Animation class as an exercise. My goal is not to create yet another widget/animation library for GWT. Also, I'm well aware that there are many libraries that do this. What I'm trying to do is learn how this can be done, not how to use some library. This is for educational purposes only.... With that said, I've implemented a simple class that performs 4 different animations on some widget: fade in, fade out, slide in, and slide out (following jQuery's animation model).

问题 in my gwt, i have a button that fire like below to create new widget @UiHandler("buttonfire") void addNewWidget(ClickEvent event) { htmlPanelHolder.add(new MyCustomWidget(),"placeholder"); } how to use jquery so that when the MyCustomWidget() show on screen it is using jquery "fadein" effect i already tried putting jsni to call jquery inside new MyCustomWidget() onload() but doesnt work. can guide me on this? 回答1: It's also possible to create a fade in effect without using jQuery. If you want