/*
* Copyright 2008 Google Inc.
*
* Licensed 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 com.dragome.forms.bindings.extra.event.logical.shared;
import com.dragome.model.interfaces.GwtEvent;
/**
* Represents a open event.
*
* @param <T> the type being opened
*/
public class OpenEvent<T> extends GwtEvent<OpenHandler<T>>
{
/**
* Handler type.
*/
private static Type<OpenHandler<?>> TYPE;
/**
* Fires a open event on all registered handlers in the handler manager.If no
* such handlers exist, this method will do nothing.
*
* @param <T> the target type
* @param source the source of the handlers
* @param target the target
*/
public static <T> void fire(HasOpenHandlers<T> source, T target)
{
if (TYPE != null)
{
OpenEvent<T> event= new OpenEvent<T>(target);
source.fireEvent(event);
}
}
/**
* Gets the type associated with this event.
*
* @return returns the handler type
*/
public static Type<OpenHandler<?>> getType()
{
if (TYPE == null)
{
TYPE= new Type<OpenHandler<?>>();
}
return TYPE;
}
private final T target;
/**
* Creates a new open event.
*
* @param target the ui object being opened
*/
protected OpenEvent(T target)
{
this.target= target;
}
@SuppressWarnings("unchecked")
@Override
public final Type<OpenHandler<T>> getAssociatedType()
{
return (Type) TYPE;
}
/**
* Gets the target.
*
* @return the target
*/
public T getTarget()
{
return target;
}
// Because of type erasure, our static type is
// wild carded, yet the "real" type should use our I param.
@Override
public void dispatch(OpenHandler<T> handler)
{
handler.onOpen(this);
}
}