I installed the groovy-vaadin addon, and my code looks like the following.
import com.vaadin.Application
import com.vaadin.ui.Button
import com.vaadin.ui.Window
import com.vaadin.ui.Window.Notification
class Hello extends Application {
void init() {
def window = new Window("Hello Vaadin!")
setMainWindow window
def button = new Button("Click!", new Button.ClickListener() {
public void buttonClick(Button.ClickEvent event) {
mainWindow.showNotification("Hello Vaadin!","Hello Vaadin!",Notification.TYPE_WARNING_MESSAGE)
//TODO de aplicar filtro
}
})
window.addComponent button
}
}
When I run the code i get the window correctly, but when i click i get an error from the button:
java.lang.NullPointerException
at com.vaadin.terminal.gwt.client.MouseEventDetails.deSerialize(MouseEventDetails.java:116)
at com.vaadin.ui.Button.changeVariables(Button.java:198)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1297)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1217)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:733)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:296)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
Any help will be greatly appreciated.
Regards
Lucas