/*
* Copyright (c) 2010 Lockheed Martin Corporation
*
* 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 org.eurekastreams.web.client.ui.common.stream.renderers;
import org.eurekastreams.server.action.request.stream.SetActivityLikeRequest;
import org.eurekastreams.server.action.request.stream.SetActivityLikeRequest.LikeActionType;
import org.eurekastreams.web.client.events.ActivityLikedChangeEvent;
import org.eurekastreams.web.client.events.EventBus;
import org.eurekastreams.web.client.events.Observer;
import org.eurekastreams.web.client.model.ActivityLikeModel;
import org.eurekastreams.web.client.ui.pages.master.StaticResourceBundle;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
/**
* Widget for liking activity.
*/
public class LikeWidget extends Composite
{
/** Current state of activity. */
private Boolean liked;
/**
* The widget.
*/
private FlowPanel widget = new FlowPanel();
/**
* The like link.
*/
private Anchor likeLink = new Anchor();
/**
* Default constructor.
*
* @param isLiked
* whether its liked by the current user.
* @param activityId
* the activity ID.
*/
public LikeWidget(final Boolean isLiked, final Long activityId)
{
widget.addStyleName(StaticResourceBundle.INSTANCE.coreCss().likeWrapper());
liked = isLiked;
likeLink.addStyleName(StaticResourceBundle.INSTANCE.coreCss().linkedLabel());
likeLink.setText(isLiked ? "Unlike" : "Like");
widget.add(likeLink);
likeLink.addClickHandler(new ClickHandler()
{
public void onClick(final ClickEvent event)
{
final LikeActionType actionType = liked ? LikeActionType.REMOVE_LIKE : LikeActionType.ADD_LIKE;
liked = !liked;
likeLink.setText(liked ? "Unlike" : "Like");
ActivityLikeModel.getInstance().update(new SetActivityLikeRequest(activityId, actionType));
}
});
// keep above likeLink setting on click as it reduces ui bugs due to event lag, this will respond to like
// count widget liking the action and change appropriately.
EventBus.getInstance().addObserver(ActivityLikedChangeEvent.class, new Observer<ActivityLikedChangeEvent>()
{
public void update(final ActivityLikedChangeEvent event)
{
if (event.getActivityId().equals(activityId) && event.getActionType() == LikeActionType.ADD_LIKE)
{
liked = true;
likeLink.setText("Unlike");
}
}
});
initWidget(widget);
}
}