Gerolf Seitz wrote:
>
> ditch the form and let CaptchaPanel extend FormComponentPanel. for the
> captcha and do a check for the form in onBeforeRender (since it's not yet
> added to the hierarchy in the constructor).
> just use "getForm();" to check for the existence of an ancestor form. this
> method throws an exception if no form was found.
>
I'd suggest that it extend Panel, not FormComponentPanel as there is no
composite data structure here. The best place to validate the input is
in a custom validator. Here is some sample code (there is also step-by-
step instruction on validation in my tutorials; see my signature):
public class CaptchaPanel extends Panel {
private static class CaptchaValidator extends AbstractValidator {
protected void onValidate(IValidatable validatable) {
String value = (String) validatable.getValue();
if (value matches the image) {
return;
}
error(validatable);
}
}
public CaptchaPanel(String id) {
super(id);
RequiredTextField t = new RequiredTextField("captchaInput", new
Model());
t.add(new CaptchaValidator());
add(t);
add(new Image("captchaImage", ...));
}
}
-----
--
Kent Tong
Wicket tutorials freely available at http://www.agileskills2.org/EWDW
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