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https://issues.apache.org/jira/browse/WICKET-2438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12749345#action_12749345
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Ian MacLarty commented on WICKET-2438:
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Note that it is the committed fix to bug 2384 that causes this problem.
The originally proposed solution submitted with the bug report
(http://issues.apache.org/jira/browse/WICKET-2384) seems to not have the side
effect of breaking ajax events on feedback message components. So a possible
fix seems to be to revert the change made in revision 796389 and instead apply
the patch originally suggested by Tsutomu YANO.
> AjaxEventBehavior not working on feedback message components
> ------------------------------------------------------------
>
> Key: WICKET-2438
> URL: https://issues.apache.org/jira/browse/WICKET-2438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.4.0, 1.4.1
> Environment: N/A
> Reporter: Ian MacLarty
>
> If you add an onclick AjaxEventBehavior to a component that is used to
> display a message in a FeedbackPanel, then when you click the feedback
> message Wicket throws an exception. The exception looks like the following:
> WicketMessage: org.apache.wicket.WicketRuntimeException: component
> feedback:feedbackul:messages:0:message not found on page bug.HomePage[id =
> 0], listener interface = [RequestListenerInterface name=IBehaviorListener,
> method=public abstract void
> org.apache.wicket.behavior.IBehaviorListener.onRequest()]
> The problem seems to be caused by the change made in revision 796389, which
> removes all the child elements of the feedback panel when it is detached.
> The bug can be reproduced by creating a wicket-1.4.1 quickstart app and
> modifying HomePage.html to be:
> <html
> xmlns:wicket="http://wicket.apache.org/dtds.data/wicket-xhtml1.3-strict.dtd"; >
> <head>
> <title>Wicket Quickstart Archetype Homepage</title>
> </head>
> <body>
> <form wicket:id="form">
> <input wicket:id="field" type="text" />
> <input type="submit" />
> </form>
> <div wicket:id="feedback" />
> </body>
> </html>
> and HomePage.java to be:
> package bug;
> import org.apache.wicket.PageParameters;
> import org.apache.wicket.markup.html.basic.Label;
> import org.apache.wicket.markup.html.WebPage;
> import org.apache.wicket.markup.html.form.*;
> import org.apache.wicket.model.*;
> import org.apache.wicket.*;
> import org.apache.wicket.markup.html.panel.*;
> import org.apache.wicket.feedback.*;
> import org.apache.wicket.ajax.*;
> /**
> * Homepage
> */
> public class HomePage extends WebPage {
> private Double value;
> public HomePage(final PageParameters parameters) {
> Form form = new Form("form", new CompoundPropertyModel(this));
> add(form);
> form.add(new TextField<Double>("field", Double.class));
> add(new FeedbackPanel("feedback") {
> @Override
> protected Component newMessageDisplayComponent(String id,
> FeedbackMessage message) {
> Label label;
> label = new Label(id, "click me");
> label.add(new AjaxEventBehavior("onclick") {
> @Override
> protected void onEvent(AjaxRequestTarget target) {
> System.out.println("error message clicked");
> }
> });
> return label;
> }
> });
> }
> public void setField(Double field) {
> value = field;
> }
> public Double getField() {
> return value;
> }
> }
> Launch the app and enter an invalid number (e.g. "xxx"). Submit the form and
> then click the "click me" message.
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