geotools/selection/FeatureMapLayerSelectionSynchronizer.java

/*******************************************************************************
 * Copyright (c) 2009 Martin O. J. Schmitz.
 * 
 * This file is part of the SCHMITZM library - a collection of utility 
 * classes based on Java 1.6, focusing (not only) on Java Swing 
 * and the Geotools library.
 * 
 * The SCHMITZM project is hosted at:
 * http://wald.intevation.org/projects/schmitzm/
 * 
 * This program 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 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 Lesser General Public License (license.txt)
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * or try this link: http://www.gnu.org/licenses/lgpl.html
 * 
 * Contributors:
 *     Martin O. J. Schmitz - initial API and implementation
 *     Stefan A. Krüger - additional utility classes
 ******************************************************************************/
/** 
 Copyright 2008 Stefan Alfons Krüger 

 atlas-framework - This file is part of the Atlas Framework

 This library 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.
 This library 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 this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA

 Diese Bibliothek ist freie Software; Sie dürfen sie unter den Bedingungen der GNU Lesser General Public License, wie von der Free Software Foundation veröffentlicht, weiterverteilen und/oder modifizieren; entweder gemäß Version 2.1 der Lizenz oder (nach Ihrer Option) jeder späteren Version.
 Diese Bibliothek wird in der Hoffnung weiterverbreitet, daß sie nützlich sein wird, jedoch OHNE IRGENDEINE GARANTIE, auch ohne die implizierte Garantie der MARKTREIFE oder der VERWENDBARKEIT FÜR EINEN BESTIMMTEN ZWECK. Mehr Details finden Sie in der GNU Lesser General Public License.
 Sie sollten eine Kopie der GNU Lesser General Public License zusammen mit dieser Bibliothek erhalten haben; falls nicht, schreiben Sie an die Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA.
 **/
package skrueger.geotools.selection;

import java.awt.RenderingHints;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import java.util.Vector;

import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionListener;

import org.geotools.feature.FeatureCollection;
import org.geotools.feature.FeatureIterator;
import org.geotools.map.MapLayer;
import org.geotools.renderer.GTRenderer;
import org.geotools.renderer.label.LabelCacheImpl;
import org.geotools.renderer.lite.StreamingRenderer;
import org.geotools.styling.FeatureTypeStyle;
import org.geotools.styling.Style;
import org.geotools.styling.visitor.DuplicatingStyleVisitor;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.filter.identity.FeatureId;

import schmitzm.geotools.FilterUtil;
import schmitzm.geotools.GTUtil;
import schmitzm.geotools.gui.JMapPane;
import schmitzm.geotools.map.event.FeatureSelectedEvent;
import schmitzm.geotools.map.event.JMapPaneEvent;
import schmitzm.geotools.map.event.JMapPaneListener;
import schmitzm.geotools.styling.StylingUtil;
import skrueger.geotools.MapPaneToolBar;
import skrueger.geotools.StyledFeaturesInterface;
import skrueger.geotools.StyledLayerInterface;

/**
 * This class keeps the selection of a (feature) {@link JTable} synchronized
 * with the {@link StyledLayerSelectionModel} of a layer. This is done by
 * implementing:
 * <ul>
 * <li>a {@link PropertyChangeListener} which listens to the
 * {@link StyledLayerSelectionModel} and accordingly changes the {@link JTable}
 * selection</li>
 * <li>a {@link ListSelectionListener} which listens to the {@link JTable} and
 * accordingly changes the {@link StyledLayerSelectionModel} selection</li>
 * </ul>
 * After creating, the instance of this synchronizer must be added as listener
 * to both, the {@link StyledLayerSelectionModel} and the table's
 * {@link ListSelectionModel}.
 * 
 * @author <a href="mailto:[email protected]">Martin Schmitz</a>
 *         (University of Bonn/Germany)
 */
public class FeatureMapLayerSelectionSynchronizer extends
                StyledLayerSelectionModelSynchronizer<StyledFeatureLayerSelectionModel>
                implements JMapPaneListener {
        public static final String SELECTION_STYLING = "SELECTION";
        /**
         * Holds the {@link MapLayer} to keep synchronized with the layer selection
         * model.
         */
        protected final MapLayer mapLayer;
        protected final StyledFeaturesInterface<?> styledLayer;
        protected final JMapPane mapPane;
        private final MapPaneToolBar toolBar;
        private final HashMap<Object, Object> defaultGTRenderingHints;

        /**
         * Creates a new synchronizer
         * 
         * @param layerSelModel
         *            layer selection model to keep synchronized with the
         *            {@link MapLayer}
         * 
         * @param mapLayer
         *            {@link MapLayer} to keep synchronized with.
         */
        public FeatureMapLayerSelectionSynchronizer(
                        StyledFeatureLayerSelectionModel layerSelModel,
                        StyledFeaturesInterface<?> styledLayer, MapLayer mapLayer,
                        JMapPane mapPane, MapPaneToolBar toolBar,
                        HashMap<Object, Object> defaultGTRenderingHints) {

                super(layerSelModel);
                this.styledLayer = styledLayer;

                this.mapLayer = mapLayer;
                this.mapPane = mapPane;
                this.toolBar = toolBar;
                if (defaultGTRenderingHints != null)
                        this.defaultGTRenderingHints = defaultGTRenderingHints;
                else
                        this.defaultGTRenderingHints = new HashMap<Object, Object>();
        }

        /**
         * Called by {@link StyledLayerSelectionModel} when a the selection on other
         * selection components (map, chart, ...) has changed. When calling this
         * 
         * method changes the {@link MapLayer} selection according to the
         * {@link StyledLayerSelectionModel} selection.
         * 
         * @param evt
         *            an event
         */
        @Override
        public void propertyChange(PropertyChangeEvent evt) {

                if (!isEnabled())
                        return;

                if (!(evt instanceof StyledLayerSelectionEvent))
                        return;
                StyledLayerSelectionEvent selEvt = (StyledLayerSelectionEvent) evt;
                // Only react on own layer and ignore events invoked by
                // this component itself
                if (selEvt.getEmitter() != layerSelModel || selectionChangeCausedByMe)
                        return;
                // Apply new selection on table (except this event is one of
                // some more events)
                Vector<String> newSelection = layerSelModel.getSelection();
                if (newSelection == null)
                        return;

                // Avoid event circles in valueChanged(..)
                selectionChangeCausedByMe = true;

                changeLayerStyle(newSelection);

                // Danger of event circles in valueChanged(..) banned
                selectionChangeCausedByMe = false;
        }

        /**
         * Changes the Style of the {@link MapLayer} to reflect changes of the
         * selection.
         * 
         * @param newSelection
         *            A {@link Vector} of SimpleFeature-IDs that are selected.
         */
        private void changeLayerStyle(final Vector<String> newSelection) {
                try {

                        Style originalStyle = mapLayer.getStyle();
                        if (newSelection.isEmpty()) {

                                // Check if the Style contains a SELECTION FTS

                                FeatureTypeStyle[] clone = originalStyle.featureTypeStyles()
                                                .toArray(new FeatureTypeStyle[] {}).clone();

                                for (FeatureTypeStyle fts : clone) {
                                        if (fts.getName() != null
                                                        && fts.getName().equals(SELECTION_STYLING)) {
                                                originalStyle.featureTypeStyles().remove(fts);

                                                replaceRenderer();
                                                // mapPane.refresh();

                                                return;
                                        }
                                }

                        } else {
                                LOGGER.debug("SELECTION .. change style");

                                // We take Style from the MapLayer that is displayed at the
                                // moment. We do not use the styledLayer.getStyle, because in
                                // the atlas, this always return the default style, but
                                // additional styles might be selected.
                                // Taking the style from the mapLayer indicated, that we have to
                                // remove any selection rules first.

                                FeatureTypeStyle selectionFTStyle = StylingUtil
                                                .createSelectionStyle(styledLayer.getGeoObject());

                                selectionFTStyle.setName(SELECTION_STYLING);

                                /**
                                 * 
                                 * Add a Filter to the selectionMapStyle, so that it is only
                                 * used on objects that are selected. <br/>
                                 * To optimize rendering speed, the filter checks whether more
                                 * than half of the features are selected. If so, the filter is
                                 * inverted to be shorter.
                                 * 
                                 */

                                final FeatureCollection<SimpleFeatureType, SimpleFeature> featureCollectionFiltered = styledLayer
                                                .getFeatureCollectionFiltered();
                                if (newSelection.size() > featureCollectionFiltered.size() / 2) {
                                        FeatureIterator<SimpleFeature> iterator = featureCollectionFiltered
                                                        .features();
                                        Set<FeatureId> antiFids = new HashSet<FeatureId>();
                                        try {
                                                while (iterator.hasNext()) {
                                                        SimpleFeature next = iterator.next();
                                                        if (!newSelection.contains(next.getID()))
                                                                antiFids.add(FilterUtil.FILTER_FAC2
                                                                                .featureId(next.getID()));
                                                }

                                                selectionFTStyle.rules().get(0).setFilter(
                                                                FilterUtil.FILTER_FAC2
                                                                                .not(FilterUtil.FILTER_FAC2
                                                                                                .id(antiFids)));

                                        } finally {
                                                featureCollectionFiltered.close(iterator);
                                        }
                                } else {
                                        Set<FeatureId> fids = new HashSet<FeatureId>();
                                        for (String fid : newSelection) {
                                                fids.add(FilterUtil.FILTER_FAC2.featureId(fid));
                                        }

                                        selectionFTStyle.rules().get(0).setFilter(
                                                        FilterUtil.FILTER_FAC2.id(fids));
                                }

                                // Maybe there has already been another selection
                                // FeatureTypeStyle... Let's replace it...
                                boolean foundAndReplaced = false;
                                for (FeatureTypeStyle fts : originalStyle.featureTypeStyles()) {
                                        if (fts.getName() != null
                                                        && fts.getName().equals(SELECTION_STYLING)) {
                                                foundAndReplaced = true;
                                                fts.rules().clear();
                                                fts.rules().addAll(selectionFTStyle.rules());
                                                break;
                                        }
                                }
                                if (!foundAndReplaced) {
                                        originalStyle.featureTypeStyles().add(selectionFTStyle);
                                }

                                // Refresh the map
                                // mapPane.refresh();

                                DuplicatingStyleVisitor dsv = new DuplicatingStyleVisitor();
                                dsv.visit(originalStyle);
                                Style newStyle = (Style) dsv.getCopy();

                                StylingUtil.saveStyleToSLD(newStyle, new File(
                                                "/home/stefan/Desktop/selection.sld"));

                                // DuplicatingStyleVisitor dsv = new DuplicatingStyleVisitor();
                                // dsv.visit(originalStyle);
                                // Style newStyle = originalStyle;

                                // Style newStyle = StylingUtil.STYLE_BUILDER.createStyle();
                                // newStyle.featureTypeStyles().addAll(originalStyle.featureTypeStyles());
                                mapLayer.setStyle(newStyle);

                                replaceRenderer();
                        }

                } catch (Exception e) {
                        LOGGER.error("Error while trying to create a selection style", e);
                }
        }

        private void replaceRenderer() {
                //
                // // Has to be done before we apply the new Renderer
                // mapLayer.setStyle(style);

                GTRenderer oldRenderer = mapPane.getRenderer();

                /**
                 * Explicitly putting a new instance of LabelCacheDefault into the
                 * renderer instance, so JMapPane doesn't reuse the old one. This is
                 * very useful when changing the TextSymbolizer with AtlasStyler<br/>
                 * SK 9.7.09: It's not enought to user LabelCache.clear(). We can not
                 * reuse the old Renderer - better to create a new one!
                 */
                final GTRenderer newRenderer = GTUtil.createGTRenderer();

                final HashMap<Object, Object> rendererHints = defaultGTRenderingHints;
                rendererHints.put(StreamingRenderer.LABEL_CACHE_KEY,
                                new LabelCacheImpl());

                newRenderer.setRendererHints(rendererHints);
                mapPane.setRenderer(newRenderer);

                if (oldRenderer != null) {

                        RenderingHints java2DHints = oldRenderer.getJava2DHints();
                        if (java2DHints != null) {
                                newRenderer.setJava2DHints(java2DHints);
                        }

                        oldRenderer.setContext(null);
                        oldRenderer = null;
                }

                mapPane.refresh();

        }

        /**
         * Used to synchronize {@link FeatureSelectedEvent}s with the
         * {@link StyledFeatureLayerSelectionModel}
         */
        @Override
        public void performMapPaneEvent(JMapPaneEvent e) {

                // Ignore event if it is caused by us or the synchronizer is disabled.
                if (!isEnabled() || selectionChangeCausedByMe)
                        return;

                if (!(e instanceof FeatureSelectedEvent)) {
                        // LOGGER.debug("Ignoring event " + e);
                        return;
                }

                /**
                 * Only listen to FeatureSelectedEvents if an appropriate tool is
                 * selected.
                 */
                final int selectedTool = toolBar.getSelectedTool();
                if (selectedTool != MapPaneToolBar.TOOL_SELECTION_ADD
                                && selectedTool != MapPaneToolBar.TOOL_SELECTION_REMOVE
                                && selectedTool != MapPaneToolBar.TOOL_SELECTION_SET) {
                        return;
                }

                // only listen to events directly coming from JMapPane
                // selection (ignore selections from FilterDialog)
                if (e.getSourceObject() != this.mapPane)
                        return;

                FeatureSelectedEvent fse = (FeatureSelectedEvent) e;

                /**
                 * Checking, that the FeatureSelectedEvent actually contains features
                 * from this layer
                 */
                final String sourceID = fse.getSourceLayer().getTitle();
                final String syncForID = mapLayer.getTitle();
                if (sourceID != null && syncForID != null
                                && !sourceID.equals(syncForID)) {
                        LOGGER.debug("Ignoring a FeatureSelectedEvent from " + sourceID);
                        return;
                }

                // LOGGER.debug("do event " + fse);

                // Avoid event circles in propertyChange(..)
                selectionChangeCausedByMe = true;

                final FeatureCollection<SimpleFeatureType, SimpleFeature> selectionResult = fse
                                .getSelectionResult();
                Iterator<SimpleFeature> fi = selectionResult.iterator();
                try {

                        // reset the selection of the DpLayerSelectionModel
                        // layerSelModel.setValueIsAdjusting(true);

                        if (selectedTool == MapPaneToolBar.TOOL_SELECTION_ADD) {
                                layerSelModel.setValueIsAdjusting(true);

                                for (int fIdx = 0; fi.hasNext(); fIdx++) {
                                        SimpleFeature f = fi.next();
                                        layerSelModel.addSelection(f.getID());
                                }
                                layerSelModel.setValueIsAdjusting(false);
                        } else if (selectedTool == MapPaneToolBar.TOOL_SELECTION_SET) {
                                layerSelModel.setValueIsAdjusting(true);
                                layerSelModel.clearSelection();

                                for (int fIdx = 0; fi.hasNext(); fIdx++) {
                                        SimpleFeature f = fi.next();
                                        layerSelModel.addSelection(f.getID());
                                }

                                // LOGGER.debug("Setting selection to " + fi.());

                                layerSelModel.setValueIsAdjusting(false);
                        } else if (selectedTool == MapPaneToolBar.TOOL_SELECTION_REMOVE) {
                                layerSelModel.setValueIsAdjusting(true);
                                for (int fIdx = 0; fi.hasNext(); fIdx++) {
                                        SimpleFeature f = fi.next();
                                        layerSelModel.removeSelection(f.getID());
                                }
                                layerSelModel.setValueIsAdjusting(false);
                        }

                } finally {
                        selectionResult.close(fi);
                }

                // Show selected features in the map, which is not automatically done by
                // the origin: FeatureSelectedEvent
                changeLayerStyle(layerSelModel.getSelection());

                // Danger of event circles in propertyChange(..) banned
                selectionChangeCausedByMe = false;
        }

}
1	/*******************************************************************************
2	* Copyright (c) 2009 Martin O. J. Schmitz.
3	*
4	* This file is part of the SCHMITZM library - a collection of utility
5	* classes based on Java 1.6, focusing (not only) on Java Swing
6	* and the Geotools library.
7	*
8	* The SCHMITZM project is hosted at:
9	* http://wald.intevation.org/projects/schmitzm/
10	*
11	* This program is free software; you can redistribute it and/or
12	* modify it under the terms of the GNU Lesser General Public License
13	* as published by the Free Software Foundation; either version 3
14	* of the License, or (at your option) any later version.
15	*
16	* This program is distributed in the hope that it will be useful,
17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19	* GNU General Public License for more details.
20	*
21	* You should have received a copy of the GNU Lesser General Public License (license.txt)
22	* along with this program; if not, write to the Free Software
23	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24	* or try this link: http://www.gnu.org/licenses/lgpl.html
25	*
26	* Contributors:
27	* Martin O. J. Schmitz - initial API and implementation
28	* Stefan A. Krüger - additional utility classes
29	******************************************************************************/
30	/**
31	Copyright 2008 Stefan Alfons Krüger
32
33	atlas-framework - This file is part of the Atlas Framework
34
35	This library 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.
36	This library 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.
37	You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
38
39	Diese Bibliothek ist freie Software; Sie dürfen sie unter den Bedingungen der GNU Lesser General Public License, wie von der Free Software Foundation veröffentlicht, weiterverteilen und/oder modifizieren; entweder gemäß Version 2.1 der Lizenz oder (nach Ihrer Option) jeder späteren Version.
40	Diese Bibliothek wird in der Hoffnung weiterverbreitet, daß sie nützlich sein wird, jedoch OHNE IRGENDEINE GARANTIE, auch ohne die implizierte Garantie der MARKTREIFE oder der VERWENDBARKEIT FÜR EINEN BESTIMMTEN ZWECK. Mehr Details finden Sie in der GNU Lesser General Public License.
41	Sie sollten eine Kopie der GNU Lesser General Public License zusammen mit dieser Bibliothek erhalten haben; falls nicht, schreiben Sie an die Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA.
42	**/
43	package skrueger.geotools.selection;
44
45	import java.awt.RenderingHints;
46	import java.beans.PropertyChangeEvent;
47	import java.beans.PropertyChangeListener;
48	import java.io.File;
49	import java.util.HashMap;
50	import java.util.HashSet;
51	import java.util.Iterator;
52	import java.util.Set;
53	import java.util.Vector;
54
55	import javax.swing.JTable;
56	import javax.swing.ListSelectionModel;
57	import javax.swing.event.ListSelectionListener;
58
59	import org.geotools.feature.FeatureCollection;
60	import org.geotools.feature.FeatureIterator;
61	import org.geotools.map.MapLayer;
62	import org.geotools.renderer.GTRenderer;
63	import org.geotools.renderer.label.LabelCacheImpl;
64	import org.geotools.renderer.lite.StreamingRenderer;
65	import org.geotools.styling.FeatureTypeStyle;
66	import org.geotools.styling.Style;
67	import org.geotools.styling.visitor.DuplicatingStyleVisitor;
68	import org.opengis.feature.simple.SimpleFeature;
69	import org.opengis.feature.simple.SimpleFeatureType;
70	import org.opengis.filter.identity.FeatureId;
71
72	import schmitzm.geotools.FilterUtil;
73	import schmitzm.geotools.GTUtil;
74	import schmitzm.geotools.gui.JMapPane;
75	import schmitzm.geotools.map.event.FeatureSelectedEvent;
76	import schmitzm.geotools.map.event.JMapPaneEvent;
77	import schmitzm.geotools.map.event.JMapPaneListener;
78	import schmitzm.geotools.styling.StylingUtil;
79	import skrueger.geotools.MapPaneToolBar;
80	import skrueger.geotools.StyledFeaturesInterface;
81	import skrueger.geotools.StyledLayerInterface;
82
83	/**
84	* This class keeps the selection of a (feature) {@link JTable} synchronized
85	* with the {@link StyledLayerSelectionModel} of a layer. This is done by
86	* implementing:
87	* <ul>
88	* <li>a {@link PropertyChangeListener} which listens to the
89	* {@link StyledLayerSelectionModel} and accordingly changes the {@link JTable}
90	* selection</li>
91	* <li>a {@link ListSelectionListener} which listens to the {@link JTable} and
92	* accordingly changes the {@link StyledLayerSelectionModel} selection</li>
93	* </ul>
94	* After creating, the instance of this synchronizer must be added as listener
95	* to both, the {@link StyledLayerSelectionModel} and the table's
96	* {@link ListSelectionModel}.
97	*
98	* @author <a href="mailto:[email protected]">Martin Schmitz</a>
99	* (University of Bonn/Germany)
100	*/
101	public class FeatureMapLayerSelectionSynchronizer extends
102	StyledLayerSelectionModelSynchronizer<StyledFeatureLayerSelectionModel>
103	implements JMapPaneListener {
104	public static final String SELECTION_STYLING = "SELECTION";
105	/**
106	* Holds the {@link MapLayer} to keep synchronized with the layer selection
107	* model.
108	*/
109	protected final MapLayer mapLayer;
110	protected final StyledFeaturesInterface<?> styledLayer;
111	protected final JMapPane mapPane;
112	private final MapPaneToolBar toolBar;
113	private final HashMap<Object, Object> defaultGTRenderingHints;
114
115	/**
116	* Creates a new synchronizer
117	*
118	* @param layerSelModel
119	* layer selection model to keep synchronized with the
120	* {@link MapLayer}
121	*
122	* @param mapLayer
123	* {@link MapLayer} to keep synchronized with.
124	*/
125	public FeatureMapLayerSelectionSynchronizer(
126	StyledFeatureLayerSelectionModel layerSelModel,
127	StyledFeaturesInterface<?> styledLayer, MapLayer mapLayer,
128	JMapPane mapPane, MapPaneToolBar toolBar,
129	HashMap<Object, Object> defaultGTRenderingHints) {
130
131	super(layerSelModel);
132	this.styledLayer = styledLayer;
133
134	this.mapLayer = mapLayer;
135	this.mapPane = mapPane;
136	this.toolBar = toolBar;
137	if (defaultGTRenderingHints != null)
138	this.defaultGTRenderingHints = defaultGTRenderingHints;
139	else
140	this.defaultGTRenderingHints = new HashMap<Object, Object>();
141	}
142
143	/**
144	* Called by {@link StyledLayerSelectionModel} when a the selection on other
145	* selection components (map, chart, ...) has changed. When calling this
146	*
147	* method changes the {@link MapLayer} selection according to the
148	* {@link StyledLayerSelectionModel} selection.
149	*
150	* @param evt
151	* an event
152	*/
153	@Override
154	public void propertyChange(PropertyChangeEvent evt) {
155
156	if (!isEnabled())
157	return;
158
159	if (!(evt instanceof StyledLayerSelectionEvent))
160	return;
161	StyledLayerSelectionEvent selEvt = (StyledLayerSelectionEvent) evt;
162	// Only react on own layer and ignore events invoked by
163	// this component itself
164	if (selEvt.getEmitter() != layerSelModel \|\| selectionChangeCausedByMe)
165	return;
166	// Apply new selection on table (except this event is one of
167	// some more events)
168	Vector<String> newSelection = layerSelModel.getSelection();
169	if (newSelection == null)
170	return;
171
172	// Avoid event circles in valueChanged(..)
173	selectionChangeCausedByMe = true;
174
175	changeLayerStyle(newSelection);
176
177	// Danger of event circles in valueChanged(..) banned
178	selectionChangeCausedByMe = false;
179	}
180
181	/**
182	* Changes the Style of the {@link MapLayer} to reflect changes of the
183	* selection.
184	*
185	* @param newSelection
186	* A {@link Vector} of SimpleFeature-IDs that are selected.
187	*/
188	private void changeLayerStyle(final Vector<String> newSelection) {
189	try {
190
191	Style originalStyle = mapLayer.getStyle();
192	if (newSelection.isEmpty()) {
193
194	// Check if the Style contains a SELECTION FTS
195
196	FeatureTypeStyle[] clone = originalStyle.featureTypeStyles()
197	.toArray(new FeatureTypeStyle[] {}).clone();
198
199	for (FeatureTypeStyle fts : clone) {
200	if (fts.getName() != null
201	&& fts.getName().equals(SELECTION_STYLING)) {
202	originalStyle.featureTypeStyles().remove(fts);
203
204	replaceRenderer();
205	// mapPane.refresh();
206
207	return;
208	}
209	}
210
211	} else {
212	LOGGER.debug("SELECTION .. change style");
213
214	// We take Style from the MapLayer that is displayed at the
215	// moment. We do not use the styledLayer.getStyle, because in
216	// the atlas, this always return the default style, but
217	// additional styles might be selected.
218	// Taking the style from the mapLayer indicated, that we have to
219	// remove any selection rules first.
220
221	FeatureTypeStyle selectionFTStyle = StylingUtil
222	.createSelectionStyle(styledLayer.getGeoObject());
223
224	selectionFTStyle.setName(SELECTION_STYLING);
225
226	/**
227	*
228	* Add a Filter to the selectionMapStyle, so that it is only
229	* used on objects that are selected. <br/>
230	* To optimize rendering speed, the filter checks whether more
231	* than half of the features are selected. If so, the filter is
232	* inverted to be shorter.
233	*
234	*/
235
236	final FeatureCollection<SimpleFeatureType, SimpleFeature> featureCollectionFiltered = styledLayer
237	.getFeatureCollectionFiltered();
238	if (newSelection.size() > featureCollectionFiltered.size() / 2) {
239	FeatureIterator<SimpleFeature> iterator = featureCollectionFiltered
240	.features();
241	Set<FeatureId> antiFids = new HashSet<FeatureId>();
242	try {
243	while (iterator.hasNext()) {
244	SimpleFeature next = iterator.next();
245	if (!newSelection.contains(next.getID()))
246	antiFids.add(FilterUtil.FILTER_FAC2
247	.featureId(next.getID()));
248	}
249
250	selectionFTStyle.rules().get(0).setFilter(
251	FilterUtil.FILTER_FAC2
252	.not(FilterUtil.FILTER_FAC2
253	.id(antiFids)));
254
255	} finally {
256	featureCollectionFiltered.close(iterator);
257	}
258	} else {
259	Set<FeatureId> fids = new HashSet<FeatureId>();
260	for (String fid : newSelection) {
261	fids.add(FilterUtil.FILTER_FAC2.featureId(fid));
262	}
263
264	selectionFTStyle.rules().get(0).setFilter(
265	FilterUtil.FILTER_FAC2.id(fids));
266	}
267
268	// Maybe there has already been another selection
269	// FeatureTypeStyle... Let's replace it...
270	boolean foundAndReplaced = false;
271	for (FeatureTypeStyle fts : originalStyle.featureTypeStyles()) {
272	if (fts.getName() != null
273	&& fts.getName().equals(SELECTION_STYLING)) {
274	foundAndReplaced = true;
275	fts.rules().clear();
276	fts.rules().addAll(selectionFTStyle.rules());
277	break;
278	}
279	}
280	if (!foundAndReplaced) {
281	originalStyle.featureTypeStyles().add(selectionFTStyle);
282	}
283
284	// Refresh the map
285	// mapPane.refresh();
286
287	DuplicatingStyleVisitor dsv = new DuplicatingStyleVisitor();
288	dsv.visit(originalStyle);
289	Style newStyle = (Style) dsv.getCopy();
290
291	StylingUtil.saveStyleToSLD(newStyle, new File(
292	"/home/stefan/Desktop/selection.sld"));
293
294	// DuplicatingStyleVisitor dsv = new DuplicatingStyleVisitor();
295	// dsv.visit(originalStyle);
296	// Style newStyle = originalStyle;
297
298	// Style newStyle = StylingUtil.STYLE_BUILDER.createStyle();
299	// newStyle.featureTypeStyles().addAll(originalStyle.featureTypeStyles());
300	mapLayer.setStyle(newStyle);
301
302	replaceRenderer();
303	}
304
305	} catch (Exception e) {
306	LOGGER.error("Error while trying to create a selection style", e);
307	}
308	}
309
310	private void replaceRenderer() {
311	//
312	// // Has to be done before we apply the new Renderer
313	// mapLayer.setStyle(style);
314
315	GTRenderer oldRenderer = mapPane.getRenderer();
316
317	/**
318	* Explicitly putting a new instance of LabelCacheDefault into the
319	* renderer instance, so JMapPane doesn't reuse the old one. This is
320	* very useful when changing the TextSymbolizer with AtlasStyler<br/>
321	* SK 9.7.09: It's not enought to user LabelCache.clear(). We can not
322	* reuse the old Renderer - better to create a new one!
323	*/
324	final GTRenderer newRenderer = GTUtil.createGTRenderer();
325
326	final HashMap<Object, Object> rendererHints = defaultGTRenderingHints;
327	rendererHints.put(StreamingRenderer.LABEL_CACHE_KEY,
328	new LabelCacheImpl());
329
330	newRenderer.setRendererHints(rendererHints);
331	mapPane.setRenderer(newRenderer);
332
333	if (oldRenderer != null) {
334
335	RenderingHints java2DHints = oldRenderer.getJava2DHints();
336	if (java2DHints != null) {
337	newRenderer.setJava2DHints(java2DHints);
338	}
339
340	oldRenderer.setContext(null);
341	oldRenderer = null;
342	}
343
344	mapPane.refresh();
345
346	}
347
348	/**
349	* Used to synchronize {@link FeatureSelectedEvent}s with the
350	* {@link StyledFeatureLayerSelectionModel}
351	*/
352	@Override
353	public void performMapPaneEvent(JMapPaneEvent e) {
354
355	// Ignore event if it is caused by us or the synchronizer is disabled.
356	if (!isEnabled() \|\| selectionChangeCausedByMe)
357	return;
358
359	if (!(e instanceof FeatureSelectedEvent)) {
360	// LOGGER.debug("Ignoring event " + e);
361	return;
362	}
363
364	/**
365	* Only listen to FeatureSelectedEvents if an appropriate tool is
366	* selected.
367	*/
368	final int selectedTool = toolBar.getSelectedTool();
369	if (selectedTool != MapPaneToolBar.TOOL_SELECTION_ADD
370	&& selectedTool != MapPaneToolBar.TOOL_SELECTION_REMOVE
371	&& selectedTool != MapPaneToolBar.TOOL_SELECTION_SET) {
372	return;
373	}
374
375	// only listen to events directly coming from JMapPane
376	// selection (ignore selections from FilterDialog)
377	if (e.getSourceObject() != this.mapPane)
378	return;
379
380	FeatureSelectedEvent fse = (FeatureSelectedEvent) e;
381
382	/**
383	* Checking, that the FeatureSelectedEvent actually contains features
384	* from this layer
385	*/
386	final String sourceID = fse.getSourceLayer().getTitle();
387	final String syncForID = mapLayer.getTitle();
388	if (sourceID != null && syncForID != null
389	&& !sourceID.equals(syncForID)) {
390	LOGGER.debug("Ignoring a FeatureSelectedEvent from " + sourceID);
391	return;
392	}
393
394	// LOGGER.debug("do event " + fse);
395
396	// Avoid event circles in propertyChange(..)
397	selectionChangeCausedByMe = true;
398
399	final FeatureCollection<SimpleFeatureType, SimpleFeature> selectionResult = fse
400	.getSelectionResult();
401	Iterator<SimpleFeature> fi = selectionResult.iterator();
402	try {
403
404	// reset the selection of the DpLayerSelectionModel
405	// layerSelModel.setValueIsAdjusting(true);
406
407	if (selectedTool == MapPaneToolBar.TOOL_SELECTION_ADD) {
408	layerSelModel.setValueIsAdjusting(true);
409
410	for (int fIdx = 0; fi.hasNext(); fIdx++) {
411	SimpleFeature f = fi.next();
412	layerSelModel.addSelection(f.getID());
413	}
414	layerSelModel.setValueIsAdjusting(false);
415	} else if (selectedTool == MapPaneToolBar.TOOL_SELECTION_SET) {
416	layerSelModel.setValueIsAdjusting(true);
417	layerSelModel.clearSelection();
418
419	for (int fIdx = 0; fi.hasNext(); fIdx++) {
420	SimpleFeature f = fi.next();
421	layerSelModel.addSelection(f.getID());
422	}
423
424	// LOGGER.debug("Setting selection to " + fi.());
425
426	layerSelModel.setValueIsAdjusting(false);
427	} else if (selectedTool == MapPaneToolBar.TOOL_SELECTION_REMOVE) {
428	layerSelModel.setValueIsAdjusting(true);
429	for (int fIdx = 0; fi.hasNext(); fIdx++) {
430	SimpleFeature f = fi.next();
431	layerSelModel.removeSelection(f.getID());
432	}
433	layerSelModel.setValueIsAdjusting(false);
434	}
435
436	} finally {
437	selectionResult.close(fi);
438	}
439
440	// Show selected features in the map, which is not automatically done by
441	// the origin: FeatureSelectedEvent
442	changeLayerStyle(layerSelModel.getSelection());
443
444	// Danger of event circles in propertyChange(..) banned
445	selectionChangeCausedByMe = false;
446	}
447
448	}
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