vaadin

问题 I wasn't able to successfully integrate the official Vaadin-CDI-Integration-Addon, since after finishing the official integration instructions, the following Exception was thrown in case I reloaded the already published URL localhost:8080/App/?restartApplication . javax.servlet.ServletException: com.vaadin.server.ServiceException: java.lang.IllegalStateException: UI id has already been defined The following little workaround is a tested, working solution, which completes the official

问题 Environment: win10 (build 10240) Vaadin Testbench 4.1 Selenium 2.53 Drivers for Firefox, Chrome, IE11 and Edge for build 10240 Node and hub start java -jar c:\users\powder\vaadin-testbench-standalone-4.1.0.jar -role hub start java -jar c:\users\powder\vaadin-testbench-standalone-4.1.0.jar -role node -Dwebdriver.edge.driver=c:\users\powder\MicrosoftWebDriver.exe Usage in java code DesiredCapabilities capabilities = new DesiredCapabilities(); capabilities.setBrowserName(DesiredCapabilities.edge

问题 I want to create custom events and fire them in some part of the view such that some other part of the view is updated/removed/refreshed. I have tried by extending the Component.Event and Component.Listener but it doesn't work. I think that events and listeners mustbe limited to the same component instance. Can this be done with Vaadin 7? Basically I want to decouple my views and provide easy communication between components. I'm also using Spring with Vaadin. If you have better ideas beside

问题 Vaadin Framework (Vaadin 8) offers a MenuBar widget, as discussed in the manual, and shown in the Sampler. When I switch the manual to "Vaadin 10" mode, I cannot find the MenuBar widget. I know Vaadin 10 (Vaadin Flow) is a major re-write of Vaadin, is the widget changed in name or not yet available? 回答1: Possibly in Vaadin 14 Update: A MenuBar widget is planned for development by Vaadin Ltd, scheduled for Vaadin 14 release. See the manual. On GitHub, see Issue # 4694 MenuBar component. No

问题 How can I change favicon of my pages in Vaadin ? I would like to change favicon of my pages but I have no idea where is the place to change it ? Has somebody experience on it ? 回答1: First, create a theme directory: /WebContent/VAADIN/themes/mynewtheme Then, put your custom favicon.ico in this directory. You also need to set theme property in your application : public class MyNewApplication extends Application { @Override public void init() { ... ... setTheme("mynewtheme"); } } 回答2: Here is a

问题 How can I change favicon of my pages in Vaadin ? I would like to change favicon of my pages but I have no idea where is the place to change it ? Has somebody experience on it ? 回答1: First, create a theme directory: /WebContent/VAADIN/themes/mynewtheme Then, put your custom favicon.ico in this directory. You also need to set theme property in your application : public class MyNewApplication extends Application { @Override public void init() { ... ... setTheme("mynewtheme"); } } 回答2: Here is a

问题 When I load my jsp page, the attached css and js files are rendered as text/html format. I noticed it from chrome browser where I could see this error message "Resource interpreted as Script but transferred with MIME type text/html" I have specified the mime type in web.xml as follows, <mime-mapping> <extension>js</extension> <mime-type>application/javascript</mime-type> </mime-mapping> <mime-mapping> <extension>css</extension> <mime-type>text/css</mime-type> </mime-mapping> <mime-mapping>

问题 I have a @JavaScript annotation in my application to load a .js file from the classpath. Now I've made an update to the file and redeployed (locally), but I always get the old version back. I've tried reloading everything (ctrl+R, ctrl+F5) but that doesn't work and also I wouldn't want the users to have to do that. A trick I used in the past (without Vaadin) was to append a request parameter with the version (e.g. ?version=1) and update that so that the URL changes. But apparently that isn't

问题 I have found many questions where people are asking how to hide scrollbars in Vaadin layouts, but my problem is that Vaadin don't show me any scrollbars. For example I can have this code: HorizontalLayout layout = new HorizontalLayout(); layout.setSizeUndefined(); // I also tried setSizeFull() for(Integer i = 1; i <= 15; i++) { layout.addComponent(new Button("Test button #" + i.toString()); } But when I run this code, buttons on the page are simply cut off when the browser window is too small

问题 Once one JPAContainer is created like JPAContainer users = JPAContainerFactory.make(User.class, "persistenceUnitName"); Now I suppose that the "users" container will use one EntityManager which in turn uses one JDBC connection from the connection pool. That resource utilization (jdbc Connection attached to EntityManager attached to JPAContainer) happens during the lifetime of the httprequest or the usage of the entityManager/connection has another lifespan ? Can you please help me understand