/*
* Copyright (C) 2010 Brockmann Consult GmbH (info@brockmann-consult.de)
*
* This program 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.
* This program 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 this program; if not, see http://www.gnu.org/licenses/
*/
package com.bc.ceres.glayer.support;
import com.bc.ceres.glayer.Layer;
import com.bc.ceres.glayer.LayerListener;
import com.bc.ceres.binding.PropertyContainer;
import java.awt.geom.Rectangle2D;
import java.beans.PropertyChangeEvent;
/**
* An (empty) {@code LayerListener} implementation.
*
* @author Norman Fomferra
* @version $revision$ $date$
*/
public abstract class AbstractLayerListener implements LayerListener {
/**
* Called if a property of the given layer has changed. The source of the property change event
* may be either the layer itself or its configuration (see {@link Layer#getConfiguration()}).
*
* @param layer The layer which triggered the change.
* @param event The layer property change event.
*/
@Override
public void handleLayerPropertyChanged(Layer layer, PropertyChangeEvent event) {
}
/**
* Called if the data of the given layer has changed.
*
* @param layer The layer which triggered the change.
* @param modelRegion The region in model coordinates which are affected by the change. May be null, if not available.
*/
@Override
public void handleLayerDataChanged(Layer layer, Rectangle2D modelRegion) {
}
/**
* Called if a new layer has been added to a collection layer.
*
* @param parentLayer The parent layer which triggered the change.
* @param childLayers The child layers added.
*/
@Override
public void handleLayersAdded(Layer parentLayer, Layer[] childLayers) {
}
/**
* Called if an existing layer has been removed from a collection layer.
*
* @param parentLayer The parent layer which triggered the change.
* @param childLayers The child layers removed.
*/
@Override
public void handleLayersRemoved(Layer parentLayer, Layer[] childLayers) {
}
/**
* @param propertyChangeEvent A property change event fired by a {@link Layer}.
* @return {@code true} if the change event is visible, e.g. causes (re)rendering of some kind of view
*/
protected boolean isVisibleChangeEvent(PropertyChangeEvent propertyChangeEvent) {
return propertyChangeEvent.getPropertyName().equals("visible")
|| propertyChangeEvent.getPropertyName().equals("transparency")
|| propertyChangeEvent.getPropertyName().equals("composite")
|| propertyChangeEvent.getSource() instanceof PropertyContainer;
}
}