/*******************************************************************************
* Copyright 2009, 2010 Lars Grammel
*
* 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.thechiselgroup.choosel.core.client.views.model;
import org.thechiselgroup.choosel.core.client.resources.CountingResourceSet;
import org.thechiselgroup.choosel.core.client.resources.DefaultResourceSet;
import org.thechiselgroup.choosel.core.client.resources.ProxyResourceSet;
import org.thechiselgroup.choosel.core.client.resources.ResourceSet;
import org.thechiselgroup.choosel.core.client.resources.ResourceSetChangedEventHandler;
import org.thechiselgroup.choosel.core.client.resources.ResourceSetDelegateChangedEventHandler;
import org.thechiselgroup.choosel.core.client.resources.UnionResourceSet;
import com.google.gwt.event.shared.HandlerRegistration;
public class HighlightingModel {
private ProxyResourceSet highlightedResourceSetContainer;
private ResourceSet highlightedSingleResources;
private UnionResourceSet combinedHighlightedResources;
public HighlightingModel() {
highlightedResourceSetContainer = new ProxyResourceSet();
/*
* We use a counting resource set, because elements might get removed
* from the set after they have been added again, e.g. when moving the
* mouse from over a resource item with popup to over a resource set and
* the popup removes the resource a bit later.
*/
highlightedSingleResources = new CountingResourceSet();
combinedHighlightedResources = new UnionResourceSet(
new DefaultResourceSet());
combinedHighlightedResources
.addResourceSet(highlightedResourceSetContainer);
combinedHighlightedResources.addResourceSet(highlightedSingleResources);
}
public HandlerRegistration addEventHandler(
ResourceSetChangedEventHandler handler) {
return combinedHighlightedResources.addEventHandler(handler);
}
public HandlerRegistration addEventHandler(
ResourceSetDelegateChangedEventHandler handler) {
return highlightedResourceSetContainer.addEventHandler(handler);
}
public void addHighlightedResources(ResourceSet resource) {
highlightedSingleResources.addAll(resource);
}
public ResourceSet getResources() {
return combinedHighlightedResources;
}
public void removeHighlightedResources(ResourceSet resources) {
highlightedSingleResources.removeAll(resources);
}
public void setHighlightedResourceSet(ResourceSet resourceSet) {
highlightedResourceSetContainer.setDelegate(resourceSet);
}
}