/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.wicket.examples.captcha;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.extensions.markup.html.captcha.CaptchaImageResource;
import org.apache.wicket.feedback.ContainerFeedbackMessageFilter;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.RequiredTextField;
import org.apache.wicket.markup.html.image.Image;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.markup.html.panel.GenericPanel;
import org.apache.wicket.model.PropertyModel;
public abstract class AbstractCaptchaForm<T> extends GenericPanel<T>
{
private static final long serialVersionUID = 1L;
/**
* The generated random text;
*/
protected String randomText;
/**
* The text provided by the user
*/
private String captchaText;
private final CaptchaImageResource captchaImageResource;
/**
* Constructor.
*
* @param id
* The component id
*/
public AbstractCaptchaForm(String id)
{
super(id);
Form<T> form = new Form<T>("form")
{
@Override
public void onSubmit()
{
if (!randomText.equals(captchaText))
{
error("Captcha text '" + captchaText + "' is wrong.\n" +
"Correct text was: " + randomText);
}
else
{
info("Success!");
}
// force redrawing
captchaImageResource.invalidate();
}
};
add(form);
final FeedbackPanel feedback = new FeedbackPanel("feedback",
new ContainerFeedbackMessageFilter(AbstractCaptchaForm.this));
form.add(feedback);
captchaImageResource = createCaptchImageResource();
final Image captchaImage = new Image("image", captchaImageResource);
captchaImage.setOutputMarkupId(true);
form.add(captchaImage);
AjaxLink<Void> changeCaptchaLink = new AjaxLink<Void>("changeLink")
{
@Override
public void onClick(AjaxRequestTarget target)
{
captchaImageResource.invalidate();
target.add(captchaImage);
}
};
form.add(changeCaptchaLink);
form.add(new RequiredTextField<String>("text",
new PropertyModel<String>(AbstractCaptchaForm.this, "captchaText"), String.class)
{
@Override
protected final void onComponentTag(final ComponentTag tag)
{
super.onComponentTag(tag);
// clear the field after each render
tag.put("value", "");
}
});
}
protected abstract CaptchaImageResource createCaptchImageResource();
}