/*
* Copyright 2012 Axel Winkler, Daniel Dunér
*
* This file is part of Daxplore Presenter.
*
* Daxplore Presenter is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* Daxplore Presenter is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Daxplore Presenter. If not, see <http://www.gnu.org/licenses/>.
*/
package org.daxplore.presenter.client.event;
import com.google.web.bindery.event.shared.Event;
import com.google.web.bindery.event.shared.EventBus;
import com.google.web.bindery.event.shared.HandlerRegistration;
/**
* An event sent when the user has selecting a new question, perspective or some
* other option that will result in a new chart.
*
* <p>Send the event over the system's {@link EventBus}.</p>
*/
public class SelectionUpdateEvent extends Event<SelectionUpdateHandler> {
private static final Type<SelectionUpdateHandler> TYPE = new Type<>();
/**
* Instantiates a new selection update event.
*/
public SelectionUpdateEvent() {
}
/**
* {@inheritDoc}
*/
@Override
public Event.Type<SelectionUpdateHandler> getAssociatedType() {
return TYPE;
}
@Override
protected void dispatch(SelectionUpdateHandler handler) {
handler.onSelectionUpdate(this);
}
/**
* Register a handler that will be notified whenever this event is sent on
* the EventBus.
*
* @param eventBus
* the event bus
* @param eventHandler
* the event handler
* @return the handler registration
*/
public static HandlerRegistration register(EventBus eventBus, SelectionUpdateHandler eventHandler) {
return eventBus.addHandler(TYPE, eventHandler);
}
}