/* * Copyright 2010-2013 Institut Pasteur. * * This file is part of Icy. * * Icy is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Icy 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Icy. If not, see <http://www.gnu.org/licenses/>. */ package icy.canvas; import icy.common.EventHierarchicalChecker; import icy.util.StringUtil; /** * Event for canvas layer. * * @author Stephane */ public class CanvasLayerEvent implements EventHierarchicalChecker { public enum LayersEventType { ADDED, REMOVED, CHANGED; } private Layer source; private final LayersEventType type; // only meaningful when type == CHANGED private String property; public CanvasLayerEvent(Layer source, LayersEventType type, String property) { super(); this.source = source; this.type = type; this.property = property; } public CanvasLayerEvent(Layer source, LayersEventType type) { this(source, type, null); } /** * @return the source */ public Layer getSource() { return source; } /** * @return the type */ public LayersEventType getType() { return type; } /** * Return the property name which has changed.<br> * <br> * It can be <code>null</code> or one of the following :<br> * <code> * Layer.PROPERTY_NAME<br> * Layer.PROPERTY_PRIORITY<br> * Layer.PROPERTY_ALPHA<br> * Layer.PROPERTY_VISIBLE<br> * </code> */ public String getProperty() { return property; } private boolean optimizeEventWith(CanvasLayerEvent e) { if (e.getType() == type) { if (type == LayersEventType.CHANGED) { if (e.getSource() == source) { // join properties if (!StringUtil.equals(e.getProperty(), property)) property = null; return true; } } else { // join sources if (e.getSource() != source) { source = null; property = null; } // join properties else if (!StringUtil.equals(e.getProperty(), property)) property = null; return true; } } return false; } @Override public boolean isEventRedundantWith(EventHierarchicalChecker event) { if (event instanceof CanvasLayerEvent) return optimizeEventWith((CanvasLayerEvent) event); return false; } }