vaadin

问题 I'm developing a web application using the Vaadin framework. I have a Button styled as BaseTheme.BUTTON_LINK and have an icon showing. The button is assigned a CSS class which has a hover state, when the button is hovered i want to change the background of the button to white color. When i expanded the area to be coloured with firebug, it gives this : <div class="v-slot v-slot-link" style="width: 25%; margin-left: 0px;"> <div class="v-button v-widget link v-button-link" tabindex="0" role=

问题 I have not been able to try the alpha and beta versions of Vaadin 8. ➥ What exactly do I need to do to change a working Vaadin 8.5.2 project to use Vaadin 8.6.0beta1 ? Scenario I am using IntelliJ 2018.3, configured to use external Maven 3.5.4. I followed the instructions seen at: https://vaadin.com/framework/releases/8.6.0.beta1 Actually, my POM already had the pair of <id>vaadin-prereleases</id> entries as shown on that page: <repositories> <!-- ... --> <repository> <id>vaadin-prereleases<

问题 I'm trying validating my beans using bean validator. The problem is I don't know which libraries(jar) are necessary to validation. I'm using. Vaadin 7, BeanFieldGroup and EclipseLink /** class of MyBean */ public class MyBean{ @Id @GeneratedValue private Long id; @NotNull @NotEmpty @Size(min=5, max=50, message="Min = 5 and Max = 50, this field is not empty") private String name; @Email @NotEmpty private String email; } Any idea ? 回答1: Follow these step-by-step instructions on how to download

问题 I'm getting the following error when i compile the widgetset. I'm using Vaadin 7.3.8 on Netbeans 8.0.2. : > cd C:\Users\H\Documents\NetBeansProjects\AVaad\AVaad-ui; "JAVA_HOME=C:\\Program Files\\Java\\jdk1.8.0_20" cmd /c "\"\"C:\\Program Files\\NetBeans 8.0.2\\java\\maven\\bin\\mvn.bat\" -Dmaven.ext.class.path=\"C:\\Program Files\\NetBeans 8.0.2\\java\\maven-nblib\\netbeans-eventspy.jar\" vaadin:compile\"" Scanning for projects... > ------------------------------------------------------------

问题 I have the following code to download a file from Vaadin Flow (12.0.7). exportBtn.addClickListener(e -> { toDownload = FileUtil.getLatestExport(); (toDownload != null) { StreamResource resource = new StreamResource(toDownload.getName(), () -> FileUtil.getInputStreamForFile(toDownload)); Element object = new Element("object"); object.setAttribute("download", true); object.setAttribute("data", resource); Input name = new Input(); UI.getCurrent().getElement().appendChild(name.getElement(),

问题 Good day. There is an application (using a CDI add on): @VaadinScoped(VaadinScope.APPLICATION) public class AdminApplication extends AbstractCdiApplication { @Inject private Instance<Lang> lang; @Override public void init() { setMainWindow(new LoginWindow(this)); } public void authenticate(String login, String password) throws Exception { lang.get(). ... } ... And the LoginWindow: public class LoginWindow extends Window { ... public LoginWindow(AdminApplication application) { super(

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . i have a vaadin application, and i used SQLContainer to display database records. the issue that i want to make the SQLcontainer update itself when any database change occurs. cam anyone help me please? 回答1: AFAIK you can't register a "listener" on changes in any database systems like MySQL, Oracle or MSSQL. Its

问题 I have a problem at vaadin framework in general. I created a class extends vaadin application(MyFirst), after that I created a custom component with vaadin visual designer(MyFormApp). I did instantiate the custom component MyFormApp, and I added it to the main window of the MyFirst. After deploying the app, the page generated by vaadin does not show any component. My code : /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package com.example

问题 According to the documentation if you have an empty Label (a Label with an empty string) the width will collapse to 0. That being said the documentation also says: "If you want a gap that has adjustable width or height, you can use an empty label if you specify a height or width for it" However when I do this the width still collapses to 0. I need the width to keep it's size because I use a different color for the background. 回答1: For me adding style to whatEverIsTheStyleName.scss that

问题 I have a pretty simple class that basically is just an AppLayout with some Tab . Now my issue. I am not able to find a smart way to display different contents for the Tabs -class. Is there any interface or something that can be called to differ the content for the Tab ? class MainAppView extends AppLayout { public MainAppView() { createDrawerAndAddToAppView(); } void createDrawerAndAddToAppView() { Tabs tabs = createTabsForDrawer(); tabs.setOrientation(Tabs.Orientation.VERTICAL); addToDrawer