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.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
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.filter.FidFilterImpl;
import org.geotools.map.MapLayer;
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.Filter;
import org.opengis.filter.Not;
import org.opengis.filter.identity.FeatureId;

import schmitzm.geotools.FilterUtil;
import schmitzm.geotools.gui.SelectableXMapPane;
import schmitzm.geotools.map.event.FeatureSelectedEvent;
import schmitzm.geotools.map.event.MapPaneEvent;
import schmitzm.geotools.map.event.JMapPaneListener;
import schmitzm.geotools.styling.StylingUtil;
import skrueger.geotools.MapPaneToolBar;
import skrueger.geotools.StyledFeaturesInterface;

/**
 * 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 SelectableXMapPane mapPane;
        private final MapPaneToolBar toolBar;

        /**
         * 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,
                        SelectableXMapPane mapPane, MapPaneToolBar toolBar) {

                super(layerSelModel);
                this.styledLayer = styledLayer;

                this.mapLayer = mapLayer;
                this.mapPane = mapPane;
                this.toolBar = toolBar;
        }

        /**
         * 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");

                                // Saving a repaint if the selection didn't change
                                if (!selectionChanged(newSelection, originalStyle)) {
                                        return;
                                }

                                // 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();

                                // SK-Debug
                                try {
                                        //
                                        StylingUtil.saveStyleToSLD(newStyle, new File(
                                                        "/home/stefan/Desktop/selection.sld"));
                                } catch (Exception e) {
                                }

                                // 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);
                }
        }

        /**
         * Analyses whether the selection has changed in comparison to the selection
         * stored in the mapLayer.Style
         * 
         * @param newSelection
         * @param originalStyle
         * @return
         */
        private boolean selectionChanged(Vector<String> newSelection,
                        Style originalStyle) {

                boolean SELECTION_STYLING_foundInMapStyle = false;

                /**
                 * testing, whether the selection really changed. If not, we can save
                 * one paint!
                 */
                for (FeatureTypeStyle fts : originalStyle.featureTypeStyles()) {

                        if (fts.getName() != null
                                        && fts.getName().equals(SELECTION_STYLING)) {

                                SELECTION_STYLING_foundInMapStyle = true;

                                Filter filter = fts.rules().get(0).getFilter();
                                if (filter instanceof Not) {
                                        FidFilterImpl antiOrigFidsFilter = (FidFilterImpl) ((Not) filter)
                                                        .getFilter();

                                        // Check one way
                                        final Set<String> antiFids = antiOrigFidsFilter
                                                        .getFidsSet();

                                        if (antiFids.isEmpty() && !newSelection.isEmpty())
                                                return true;

                                        for (String fid : antiFids) {
                                                if (newSelection.contains(fid)) {
                                                        return true;
                                                }
                                        }

                                        // Check the other way
                                        for (String fid : newSelection) {
                                                if (antiFids.contains(fid)) {
                                                        return true;
                                                }
                                        }

                                } else {
                                        FidFilterImpl origFidsFilter = (FidFilterImpl) filter;

                                        // Check one way
                                        final Set<String> fids = origFidsFilter.getFidsSet();

                                        if (fids.isEmpty() && newSelection.isEmpty())
                                                return false;
                                        if (fids.size() != newSelection.size())
                                                return true;

                                        for (String fid : fids) {
                                                if (!newSelection.contains(fid)) {
                                                        return true;
                                                }
                                        }

                                        // Check the other way
                                        for (String fid : newSelection) {
                                                if (!fids.contains(fid)) {
                                                        return true;
                                                }
                                        }

                                }

                                break;
                        }
                }

                if (!SELECTION_STYLING_foundInMapStyle && !newSelection.isEmpty())
                        return true;

                return false;
        }

        /**
         * Replaces the local renderer 
         */
        private void replaceRenderer() {
//              //
//              // // Has to be done before we apply the new Renderer
//              // mapLayer.setStyle(style);
//
//              GTRenderer oldRenderer = mapPane.getLocalRenderer();
//
//              /**
//               * 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.setLocalRenderer(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(MapPaneEvent 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;

                /**
                 * Checking, that the FeatureSelectedEvent actually contains features
                 * from this layer
                 */
                FeatureSelectedEvent fse = (FeatureSelectedEvent) e;
                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.beans.PropertyChangeEvent;
46	import java.beans.PropertyChangeListener;
47	import java.io.File;
48	import java.util.HashSet;
49	import java.util.Iterator;
50	import java.util.Set;
51	import java.util.Vector;
52
53	import javax.swing.JTable;
54	import javax.swing.ListSelectionModel;
55	import javax.swing.event.ListSelectionListener;
56
57	import org.geotools.feature.FeatureCollection;
58	import org.geotools.feature.FeatureIterator;
59	import org.geotools.filter.FidFilterImpl;
60	import org.geotools.map.MapLayer;
61	import org.geotools.styling.FeatureTypeStyle;
62	import org.geotools.styling.Style;
63	import org.geotools.styling.visitor.DuplicatingStyleVisitor;
64	import org.opengis.feature.simple.SimpleFeature;
65	import org.opengis.feature.simple.SimpleFeatureType;
66	import org.opengis.filter.Filter;
67	import org.opengis.filter.Not;
68	import org.opengis.filter.identity.FeatureId;
69
70	import schmitzm.geotools.FilterUtil;
71	import schmitzm.geotools.gui.SelectableXMapPane;
72	import schmitzm.geotools.map.event.FeatureSelectedEvent;
73	import schmitzm.geotools.map.event.MapPaneEvent;
74	import schmitzm.geotools.map.event.JMapPaneListener;
75	import schmitzm.geotools.styling.StylingUtil;
76	import skrueger.geotools.MapPaneToolBar;
77	import skrueger.geotools.StyledFeaturesInterface;
78
79	/**
80	* This class keeps the selection of a (feature) {@link JTable} synchronized
81	* with the {@link StyledLayerSelectionModel} of a layer. This is done by
82	* implementing:
83	* <ul>
84	* <li>a {@link PropertyChangeListener} which listens to the
85	* {@link StyledLayerSelectionModel} and accordingly changes the {@link JTable}
86	* selection</li>
87	* <li>a {@link ListSelectionListener} which listens to the {@link JTable} and
88	* accordingly changes the {@link StyledLayerSelectionModel} selection</li>
89	* </ul>
90	* After creating, the instance of this synchronizer must be added as listener
91	* to both, the {@link StyledLayerSelectionModel} and the table's
92	* {@link ListSelectionModel}.
93	*
94	* @author <a href="mailto:[email protected]">Martin Schmitz</a>
95	* (University of Bonn/Germany)
96	*/
97	public class FeatureMapLayerSelectionSynchronizer extends
98	StyledLayerSelectionModelSynchronizer<StyledFeatureLayerSelectionModel>
99	implements JMapPaneListener {
100	public static final String SELECTION_STYLING = "SELECTION";
101	/**
102	* Holds the {@link MapLayer} to keep synchronized with the layer selection
103	* model.
104	*/
105	protected final MapLayer mapLayer;
106	protected final StyledFeaturesInterface<?> styledLayer;
107	protected final SelectableXMapPane mapPane;
108	private final MapPaneToolBar toolBar;
109
110	/**
111	* Creates a new synchronizer
112	*
113	* @param layerSelModel
114	* layer selection model to keep synchronized with the
115	* {@link MapLayer}
116	*
117	* @param mapLayer
118	* {@link MapLayer} to keep synchronized with.
119	*/
120	public FeatureMapLayerSelectionSynchronizer(
121	StyledFeatureLayerSelectionModel layerSelModel,
122	StyledFeaturesInterface<?> styledLayer, MapLayer mapLayer,
123	SelectableXMapPane mapPane, MapPaneToolBar toolBar) {
124
125	super(layerSelModel);
126	this.styledLayer = styledLayer;
127
128	this.mapLayer = mapLayer;
129	this.mapPane = mapPane;
130	this.toolBar = toolBar;
131	}
132
133	/**
134	* Called by {@link StyledLayerSelectionModel} when a the selection on other
135	* selection components (map, chart, ...) has changed. When calling this
136	*
137	* method changes the {@link MapLayer} selection according to the
138	* {@link StyledLayerSelectionModel} selection.
139	*
140	* @param evt
141	* an event
142	*/
143	@Override
144	public void propertyChange(PropertyChangeEvent evt) {
145
146	if (!isEnabled())
147	return;
148
149	if (!(evt instanceof StyledLayerSelectionEvent))
150	return;
151	StyledLayerSelectionEvent selEvt = (StyledLayerSelectionEvent) evt;
152	// Only react on own layer and ignore events invoked by
153	// this component itself
154	if (selEvt.getEmitter() != layerSelModel \|\| selectionChangeCausedByMe)
155	return;
156	// Apply new selection on table (except this event is one of
157	// some more events)
158	Vector<String> newSelection = layerSelModel.getSelection();
159	if (newSelection == null)
160	return;
161
162	// Avoid event circles in valueChanged(..)
163	selectionChangeCausedByMe = true;
164
165	changeLayerStyle(newSelection);
166
167	// Danger of event circles in valueChanged(..) banned
168	selectionChangeCausedByMe = false;
169	}
170
171	/**
172	* Changes the Style of the {@link MapLayer} to reflect changes of the
173	* selection.
174	*
175	* @param newSelection
176	* A {@link Vector} of SimpleFeature-IDs that are selected.
177	*/
178	private void changeLayerStyle(final Vector<String> newSelection) {
179	try {
180
181	Style originalStyle = mapLayer.getStyle();
182
183	if (newSelection.isEmpty()) {
184
185	// Check if the Style contains a SELECTION FTS
186
187	FeatureTypeStyle[] clone = originalStyle.featureTypeStyles()
188	.toArray(new FeatureTypeStyle[] {}).clone();
189
190	for (FeatureTypeStyle fts : clone) {
191	if (fts.getName() != null
192	&& fts.getName().equals(SELECTION_STYLING)) {
193	originalStyle.featureTypeStyles().remove(fts);
194
195	replaceRenderer();
196	// mapPane.refresh();
197
198	return;
199	}
200	}
201
202	} else {
203
204	LOGGER.debug("SELECTION .. change style");
205
206	// Saving a repaint if the selection didn't change
207	if (!selectionChanged(newSelection, originalStyle)) {
208	return;
209	}
210
211	// We take Style from the MapLayer that is displayed at the
212	// moment. We do not use the styledLayer.getStyle, because in
213	// the atlas, this always return the default style, but
214	// additional styles might be selected.
215	// Taking the style from the mapLayer indicated, that we have to
216	// remove any selection rules first.
217
218	FeatureTypeStyle selectionFTStyle = StylingUtil
219	.createSelectionStyle(styledLayer.getGeoObject());
220
221	selectionFTStyle.setName(SELECTION_STYLING);
222
223	/**
224	*
225	* Add a Filter to the selectionMapStyle, so that it is only
226	* used on objects that are selected. <br/>
227	* To optimize rendering speed, the filter checks whether more
228	* than half of the features are selected. If so, the filter is
229	* inverted to be shorter.
230	*
231	*/
232	final FeatureCollection<SimpleFeatureType, SimpleFeature> featureCollectionFiltered = styledLayer
233	.getFeatureCollectionFiltered();
234	if (newSelection.size() > featureCollectionFiltered.size() / 2) {
235	FeatureIterator<SimpleFeature> iterator = featureCollectionFiltered
236	.features();
237	Set<FeatureId> antiFids = new HashSet<FeatureId>();
238	try {
239	while (iterator.hasNext()) {
240	SimpleFeature next = iterator.next();
241	if (!newSelection.contains(next.getID()))
242	antiFids.add(FilterUtil.FILTER_FAC2
243	.featureId(next.getID()));
244	}
245
246	selectionFTStyle.rules().get(0).setFilter(
247	FilterUtil.FILTER_FAC2
248	.not(FilterUtil.FILTER_FAC2
249	.id(antiFids)));
250
251	} finally {
252	featureCollectionFiltered.close(iterator);
253	}
254	} else {
255	Set<FeatureId> fids = new HashSet<FeatureId>();
256	for (String fid : newSelection) {
257	fids.add(FilterUtil.FILTER_FAC2.featureId(fid));
258	}
259
260	selectionFTStyle.rules().get(0).setFilter(
261	FilterUtil.FILTER_FAC2.id(fids));
262	}
263
264	// Maybe there has already been another selection
265	// FeatureTypeStyle... Let's replace it...
266	boolean foundAndReplaced = false;
267	for (FeatureTypeStyle fts : originalStyle.featureTypeStyles()) {
268	if (fts.getName() != null
269	&& fts.getName().equals(SELECTION_STYLING)) {
270	foundAndReplaced = true;
271	fts.rules().clear();
272	fts.rules().addAll(selectionFTStyle.rules());
273	break;
274	}
275	}
276	if (!foundAndReplaced) {
277	originalStyle.featureTypeStyles().add(selectionFTStyle);
278	}
279
280	// Refresh the map
281	// mapPane.refresh();
282
283	DuplicatingStyleVisitor dsv = new DuplicatingStyleVisitor();
284	dsv.visit(originalStyle);
285	Style newStyle = (Style) dsv.getCopy();
286
287	// SK-Debug
288	try {
289	//
290	StylingUtil.saveStyleToSLD(newStyle, new File(
291	"/home/stefan/Desktop/selection.sld"));
292	} catch (Exception e) {
293	}
294
295	// DuplicatingStyleVisitor dsv = new DuplicatingStyleVisitor();
296	// dsv.visit(originalStyle);
297	// Style newStyle = originalStyle;
298
299	// Style newStyle = StylingUtil.STYLE_BUILDER.createStyle();
300	// newStyle.featureTypeStyles().addAll(originalStyle.featureTypeStyles());
301	mapLayer.setStyle(newStyle);
302
303	replaceRenderer();
304	}
305
306	} catch (Exception e) {
307	LOGGER.error("Error while trying to create a selection style", e);
308	}
309	}
310
311	/**
312	* Analyses whether the selection has changed in comparison to the selection
313	* stored in the mapLayer.Style
314	*
315	* @param newSelection
316	* @param originalStyle
317	* @return
318	*/
319	private boolean selectionChanged(Vector<String> newSelection,
320	Style originalStyle) {
321
322	boolean SELECTION_STYLING_foundInMapStyle = false;
323
324	/**
325	* testing, whether the selection really changed. If not, we can save
326	* one paint!
327	*/
328	for (FeatureTypeStyle fts : originalStyle.featureTypeStyles()) {
329
330	if (fts.getName() != null
331	&& fts.getName().equals(SELECTION_STYLING)) {
332
333	SELECTION_STYLING_foundInMapStyle = true;
334
335	Filter filter = fts.rules().get(0).getFilter();
336	if (filter instanceof Not) {
337	FidFilterImpl antiOrigFidsFilter = (FidFilterImpl) ((Not) filter)
338	.getFilter();
339
340	// Check one way
341	final Set<String> antiFids = antiOrigFidsFilter
342	.getFidsSet();
343
344	if (antiFids.isEmpty() && !newSelection.isEmpty())
345	return true;
346
347	for (String fid : antiFids) {
348	if (newSelection.contains(fid)) {
349	return true;
350	}
351	}
352
353	// Check the other way
354	for (String fid : newSelection) {
355	if (antiFids.contains(fid)) {
356	return true;
357	}
358	}
359
360	} else {
361	FidFilterImpl origFidsFilter = (FidFilterImpl) filter;
362
363	// Check one way
364	final Set<String> fids = origFidsFilter.getFidsSet();
365
366	if (fids.isEmpty() && newSelection.isEmpty())
367	return false;
368	if (fids.size() != newSelection.size())
369	return true;
370
371	for (String fid : fids) {
372	if (!newSelection.contains(fid)) {
373	return true;
374	}
375	}
376
377	// Check the other way
378	for (String fid : newSelection) {
379	if (!fids.contains(fid)) {
380	return true;
381	}
382	}
383
384	}
385
386	break;
387	}
388	}
389
390	if (!SELECTION_STYLING_foundInMapStyle && !newSelection.isEmpty())
391	return true;
392
393	return false;
394	}
395
396	/**
397	* Replaces the local renderer
398	*/
399	private void replaceRenderer() {
400	// //
401	// // // Has to be done before we apply the new Renderer
402	// // mapLayer.setStyle(style);
403	//
404	// GTRenderer oldRenderer = mapPane.getLocalRenderer();
405	//
406	// /**
407	// * Explicitly putting a new instance of LabelCacheDefault into the
408	// * renderer instance, so JMapPane doesn't reuse the old one. This is
409	// * very useful when changing the TextSymbolizer with AtlasStyler<br/>
410	// * SK 9.7.09: It's not enought to user LabelCache.clear(). We can not
411	// * reuse the old Renderer - better to create a new one!
412	// */
413	// final GTRenderer newRenderer = GTUtil.createGTRenderer();
414	//
415	// final HashMap<Object, Object> rendererHints = defaultGTRenderingHints;
416	// rendererHints.put(StreamingRenderer.LABEL_CACHE_KEY,
417	// new LabelCacheImpl());
418	//
419	// newRenderer.setRendererHints(rendererHints);
420	// mapPane.setLocalRenderer(newRenderer);
421	//
422	// if (oldRenderer != null) {
423	//
424	// RenderingHints java2DHints = oldRenderer.getJava2DHints();
425	// if (java2DHints != null) {
426	// newRenderer.setJava2DHints(java2DHints);
427	// }
428	//
429	// oldRenderer.setContext(null);
430	// oldRenderer = null;
431	// }
432
433	mapPane.refresh();
434
435	}
436
437	/**
438	* Used to synchronize {@link FeatureSelectedEvent}s with the
439	* {@link StyledFeatureLayerSelectionModel}
440	*/
441	@Override
442	public void performMapPaneEvent(MapPaneEvent e) {
443
444	// Ignore event if it is caused by us or the synchronizer is disabled.
445	if (!isEnabled() \|\| selectionChangeCausedByMe)
446	return;
447
448	if (!(e instanceof FeatureSelectedEvent)) {
449	// LOGGER.debug("Ignoring event " + e);
450	return;
451	}
452
453	/**
454	* Only listen to FeatureSelectedEvents if an appropriate tool is
455	* selected.
456	*/
457	final int selectedTool = toolBar.getSelectedTool();
458	if (selectedTool != MapPaneToolBar.TOOL_SELECTION_ADD
459	&& selectedTool != MapPaneToolBar.TOOL_SELECTION_REMOVE
460	&& selectedTool != MapPaneToolBar.TOOL_SELECTION_SET) {
461	return;
462	}
463
464	// only listen to events directly coming from JMapPane
465	// selection (ignore selections from FilterDialog)
466	if (e.getSourceObject() != this.mapPane)
467	return;
468
469	/**
470	* Checking, that the FeatureSelectedEvent actually contains features
471	* from this layer
472	*/
473	FeatureSelectedEvent fse = (FeatureSelectedEvent) e;
474	final String sourceID = fse.getSourceLayer().getTitle();
475	final String syncForID = mapLayer.getTitle();
476	if (sourceID != null && syncForID != null
477	&& !sourceID.equals(syncForID)) {
478	LOGGER.debug("Ignoring a FeatureSelectedEvent from " + sourceID);
479	return;
480	}
481
482	// LOGGER.debug("do event " + fse);
483
484	// Avoid event circles in propertyChange(..)
485	selectionChangeCausedByMe = true;
486
487	final FeatureCollection<SimpleFeatureType, SimpleFeature> selectionResult = fse
488	.getSelectionResult();
489	Iterator<SimpleFeature> fi = selectionResult.iterator();
490	try {
491
492	// reset the selection of the DpLayerSelectionModel
493	// layerSelModel.setValueIsAdjusting(true);
494
495	if (selectedTool == MapPaneToolBar.TOOL_SELECTION_ADD) {
496	layerSelModel.setValueIsAdjusting(true);
497
498	for (int fIdx = 0; fi.hasNext(); fIdx++) {
499	SimpleFeature f = fi.next();
500	layerSelModel.addSelection(f.getID());
501	}
502	layerSelModel.setValueIsAdjusting(false);
503	} else if (selectedTool == MapPaneToolBar.TOOL_SELECTION_SET) {
504	layerSelModel.setValueIsAdjusting(true);
505	layerSelModel.clearSelection();
506
507	for (int fIdx = 0; fi.hasNext(); fIdx++) {
508	SimpleFeature f = fi.next();
509	layerSelModel.addSelection(f.getID());
510	}
511
512	// LOGGER.debug("Setting selection to " + fi.());
513
514	layerSelModel.setValueIsAdjusting(false);
515	} else if (selectedTool == MapPaneToolBar.TOOL_SELECTION_REMOVE) {
516	layerSelModel.setValueIsAdjusting(true);
517	for (int fIdx = 0; fi.hasNext(); fIdx++) {
518	SimpleFeature f = fi.next();
519	layerSelModel.removeSelection(f.getID());
520	}
521	layerSelModel.setValueIsAdjusting(false);
522	}
523
524	} finally {
525	selectionResult.close(fi);
526	}
527
528	// Show selected features in the map, which is not automatically done by
529	// the origin: FeatureSelectedEvent
530	changeLayerStyle(layerSelModel.getSelection());
531
532	// Danger of event circles in propertyChange(..) banned
533	selectionChangeCausedByMe = false;
534	}
535
536	}
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