MVC :: Event interceptor

juri — Mon, 25 Aug 2008 10:50:55 GMT

Author: juri
Subject: Event interceptor
Posted: Mon Aug 25, 2008 10:50 am (GMT 0)

Hello.

Is it possible to implement in aranea unsaved data validation (just like in gmail).
If I have changed any data on the form and I'm trying to do the following actions:
- back/forward button click
- any link/button click
- close window
then I get the popup:

Code:

Your data has not been saved.
Discard your data? Ok. Cancel.

Thank you in advance

MVC :: RE: Form link messages [SOLVED]

juri — Mon, 25 Aug 2008 07:33:37 GMT

Author: juri
Posted: Mon Aug 25, 2008 7:33 am (GMT 0)

I have solved my problem adding to FormElement components LinkValidationErrorRenderer class:

Code:

public void addWidget(Object key, Widget child) {
FormElementValidationErrorRenderer renderer = new LinkValidationErrorRenderer();
if (child instanceof FormWidget) {
FormWidget formWidget = (FormWidget) child;
for (Iterator it = formWidget.getElements().values().iterator(); it.hasNext(); ) {
Object element = it.next();
if (element instanceof FormElement) {
((FormElement) element).setFormElementValidationErrorRenderer(renderer);
}
}
}
super.addWidget(key, child);
}

public static class LinkValidationErrorRenderer extends StandardFormElementValidationErrorRenderer {
private static final long serialVersionUID = 1L;

public void addError(FormElement element, String error) {
EvmiMessageContext evmiMessageCtx = (EvmiMessageContext) EnvironmentUtil.requireMessageContext(element.getEnvironment());
evmiMessageCtx.showMessage(EvmiMessageContext.ERROR_TYPE, error, element.getScope().toString());
}
}

and overriding araneaMessagingFilter in aranea-conf.xml that adds formElementId to EvmiMessageContext.

Code:

public interface EvmiMessageContext extends MessageContext {
public void showMessage(String type, String message, String formElementId);
public Map getEvmiMessages();
}

After that I overrided tag, that output messages:

Code:

private void writeEvmiMessageBody(Writer out, String message, String elementId) throws Exception {
out.write("<a href=\"#" + elementId + "\">" + StringEscapeUtils.escapeHtml(message) + "</a>");
}

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MVC :: Event interceptor

MVC :: RE: Form link messages [SOLVED]