/*
* 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.ajax.markup.html.form;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.IAjaxCallDecorator;
import org.apache.wicket.ajax.form.AjaxFormSubmitBehavior;
import org.apache.wicket.markup.html.form.Button;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.util.string.AppendingStringBuffer;
/**
* A button that submits the form via ajax. Since this button takes the form as a constructor
* argument it does not need to be added to it unlike the {@link Button} component.
*
* @since 1.3
*
* @author Igor Vaynberg (ivaynberg)
*/
public abstract class AjaxButton extends Button
{
private static final long serialVersionUID = 1L;
private final Form form;
/**
* Construct.
*
* @param id
*/
public AjaxButton(String id)
{
this(id, null);
}
/**
* Returns the form if it was set in constructor, otherwise returns the form nearest in parent
* hierarchy.
*
* @see org.apache.wicket.markup.html.form.FormComponent#getForm()
*/
public Form getForm()
{
if (form != null)
{
return form;
}
else
{
return super.getForm();
}
}
/**
* Construct.
*
* @param id
* @param form
*/
public AjaxButton(String id, final Form form)
{
super(id);
this.form = form;
add(new AjaxFormSubmitBehavior(form, "onclick")
{
private static final long serialVersionUID = 1L;
protected void onSubmit(AjaxRequestTarget target)
{
AjaxButton.this.onSubmit(target, AjaxButton.this.getForm());
}
protected void onError(AjaxRequestTarget target)
{
AjaxButton.this.onError(target, AjaxButton.this.getForm());
}
protected CharSequence getEventHandler()
{
return new AppendingStringBuffer(super.getEventHandler()).append("; return false;");
}
protected IAjaxCallDecorator getAjaxCallDecorator()
{
return AjaxButton.this.getAjaxCallDecorator();
}
});
}
/**
* Returns the {@link IAjaxCallDecorator} that will be used to modify the generated javascript.
* This is the preferred way of changing the javascript in the onclick handler
*
* @return call decorator used to modify the generated javascript or null for none
*/
protected IAjaxCallDecorator getAjaxCallDecorator()
{
return null;
}
/**
* Listener method invoked on form submit with no errors
*
* @param target
* @param form
*/
protected abstract void onSubmit(AjaxRequestTarget target, Form form);
/**
* Listener method invoked on form submit with errors
*
* @param target
* @param form
*
* TODO 1.3: Make abstract to be consistent with onSubmit()
*/
protected void onError(AjaxRequestTarget target, Form form)
{
}
}