Source Code Cross Referenced for SelectionManager.java in  » GIS » openjump » com » vividsolutions » jump » workbench » ui » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » openjump » com.vividsolutions.jump.workbench.ui 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI 
003:         * for visualizing and manipulating spatial features with geometry and attributes.
004:         *
005:         * Copyright (C) 2003 Vivid Solutions
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License
009:         * as published by the Free Software Foundation; either version 2
010:         * of the License, or (at your option) any later version.
011:         * 
012:         * This program is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
015:         * GNU General Public License for more details.
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * along with this program; if not, write to the Free Software
019:         * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
020:         * 
021:         * For more information, contact:
022:         *
023:         * Vivid Solutions
024:         * Suite #1A
025:         * 2328 Government Street
026:         * Victoria BC  V8T 5G5
027:         * Canada
028:         *
029:         * (250)385-6040
030:         * www.vividsolutions.com
031:         */
032:
033:        package com.vividsolutions.jump.workbench.ui;
034:
035:        import java.util.ArrayList;
036:        import java.util.Arrays;
037:        import java.util.Collection;
038:        import java.util.Collections;
039:        import java.util.HashSet;
040:        import java.util.Iterator;
041:        import java.util.List;
042:
043:        import com.vividsolutions.jts.geom.Geometry;
044:        import com.vividsolutions.jump.feature.Feature;
045:        import com.vividsolutions.jump.workbench.model.CategoryEvent;
046:        import com.vividsolutions.jump.workbench.model.FeatureEvent;
047:        import com.vividsolutions.jump.workbench.model.FeatureEventType;
048:        import com.vividsolutions.jump.workbench.model.Layer;
049:        import com.vividsolutions.jump.workbench.model.LayerEvent;
050:        import com.vividsolutions.jump.workbench.model.LayerEventType;
051:        import com.vividsolutions.jump.workbench.model.LayerListener;
052:        import com.vividsolutions.jump.workbench.model.LayerManager;
053:        import com.vividsolutions.jump.workbench.model.LayerManagerProxy;
054:        import com.vividsolutions.jump.workbench.ui.renderer.SelectionBackgroundRenderer;
055:
056:        /**
057:         * Provides aggregate information for selected features, parts, and linestrings.
058:         * Note that there is a difference between "selected features" and "features with
059:         * selected items": the former consists of wholly selected features; the latter,
060:         * wholly and partially selected features. To access a specific level of selection,
061:         * use #getFeatureSelection, #getPartSelection, or #getLineStringSelection.
062:         * "Parts" are components of GeometryCollections.
063:         * <p>
064:         * To get wholly selected features (i.e. not those that just have selected
065:         * parts or linestrings), use <code>getFeatureSelection().getFeaturesWithSelectedItems()</code>
066:         * <p>
067:         * To get features that are selected or have selected parts or linestrings,
068:         * use <code>getFeaturesWithSelectedItems()</code>
069:         * <p>
070:         * Yes there is a way to listen for selection events: LayerViewPanel#addListener.
071:         */
072:        public class SelectionManager {
073:            private FeatureSelection featureSelection;
074:            private PartSelection partSelection;
075:            private LineStringSelection lineStringSelection;
076:            private LayerManagerProxy layerManagerProxy;
077:            private LayerViewPanel panel;
078:
079:            /**
080:             * A feature may get split into two or more -- for example, if two linestrings of a feature
081:             * are selected. 
082:             */
083:            public Collection createFeaturesFromSelectedItems() {
084:                ArrayList newFeatures = new ArrayList();
085:                for (Iterator i = getLayersWithSelectedItems().iterator(); i
086:                        .hasNext();) {
087:                    Layer layer = (Layer) i.next();
088:                    newFeatures.addAll(createFeaturesFromSelectedItems(layer));
089:                }
090:                return newFeatures;
091:            }
092:
093:            public Collection createFeaturesFromSelectedItems(Layer layer) {
094:                ArrayList newFeatures = new ArrayList();
095:                for (Iterator i = getFeaturesWithSelectedItems(layer)
096:                        .iterator(); i.hasNext();) {
097:                    Feature feature = (Feature) i.next();
098:                    for (Iterator j = getSelectedItems(layer, feature)
099:                            .iterator(); j.hasNext();) {
100:                        Geometry item = (Geometry) j.next();
101:                        Feature newFeature = (Feature) feature.clone();
102:                        newFeature.setGeometry(item);
103:                        newFeatures.add(newFeature);
104:                    }
105:                }
106:                return newFeatures;
107:            }
108:
109:            private boolean panelUpdatesEnabled = true;
110:
111:            public SelectionManager(LayerViewPanel panel,
112:                    LayerManagerProxy layerManagerProxy) {
113:                this .panel = panel;
114:                this .layerManagerProxy = layerManagerProxy;
115:                featureSelection = new FeatureSelection(this );
116:                lineStringSelection = new LineStringSelection(this );
117:                partSelection = new PartSelection(this );
118:                featureSelection.setParent(null);
119:                featureSelection.setChild(partSelection);
120:                partSelection.setParent(featureSelection);
121:                partSelection.setChild(lineStringSelection);
122:                lineStringSelection.setParent(partSelection);
123:                lineStringSelection.setChild(null);
124:                selections = Collections.unmodifiableList(Arrays
125:                        .asList(new Object[] { featureSelection, partSelection,
126:                                lineStringSelection }));
127:                addLayerListenerTo(layerManagerProxy.getLayerManager());
128:            }
129:
130:            private LayerListener layerListener = new LayerListener() {
131:                public void featuresChanged(FeatureEvent e) {
132:                    if (e.getType() == FeatureEventType.DELETED) {
133:                        unselectItems(e.getLayer(), e.getFeatures());
134:                    }
135:                    if (e.getType() == FeatureEventType.GEOMETRY_MODIFIED) {
136:                        unselectFromFeaturesWithModifiedItemCounts(
137:                                e.getLayer(), e.getFeatures(), e
138:                                        .getOldFeatureClones());
139:                    }
140:                }
141:
142:                public void layerChanged(LayerEvent e) {
143:                    if (!(e.getLayerable() instanceof  Layer)) {
144:                        return;
145:                    }
146:                    if (e.getType() == LayerEventType.REMOVED
147:                            || e.getType() == LayerEventType.VISIBILITY_CHANGED) {
148:                        unselectItems((Layer) e.getLayerable());
149:                    }
150:                }
151:
152:                public void categoryChanged(CategoryEvent e) {
153:                }
154:            };
155:
156:            private void addLayerListenerTo(LayerManager layerManager) {
157:                layerManager.addLayerListener(layerListener);
158:            }
159:
160:            public void clear() {
161:                boolean originalPanelUpdatesEnabled = arePanelUpdatesEnabled();
162:                setPanelUpdatesEnabled(false);
163:                try {
164:                    for (Iterator i = selections.iterator(); i.hasNext();) {
165:                        AbstractSelection selection = (AbstractSelection) i
166:                                .next();
167:                        selection.unselectItems();
168:                    }
169:                } finally {
170:                    setPanelUpdatesEnabled(originalPanelUpdatesEnabled);
171:                }
172:                updatePanel();
173:            }
174:
175:            public FeatureSelection getFeatureSelection() {
176:                return featureSelection;
177:            }
178:
179:            public LineStringSelection getLineStringSelection() {
180:                return lineStringSelection;
181:            }
182:
183:            /**
184:             * @return AbstractSelections
185:             */
186:            public Collection getSelections() {
187:                return selections;
188:            }
189:
190:            private List selections;
191:
192:            /**
193:             * "items" rather than "geometries" because the user may have selected a part
194:             * of a Geometry (an element of a GeometryCollection or a ring of a Polygon).
195:             * @return a collection of Geometries
196:             */
197:            public Collection getSelectedItems() {
198:                ArrayList selectedItems = new ArrayList();
199:                for (Iterator i = selections.iterator(); i.hasNext();) {
200:                    AbstractSelection selection = (AbstractSelection) i.next();
201:                    selectedItems.addAll(selection.getSelectedItems());
202:                }
203:                return selectedItems;
204:            }
205:
206:            public Collection getSelectedItems(Layer layer) {
207:                ArrayList selectedItems = new ArrayList();
208:                for (Iterator i = selections.iterator(); i.hasNext();) {
209:                    AbstractSelection selection = (AbstractSelection) i.next();
210:                    selectedItems.addAll(selection.getSelectedItems(layer));
211:                }
212:                return selectedItems;
213:            }
214:
215:            public Collection getSelectedItems(Layer layer, Feature feature) {
216:                ArrayList selectedItems = new ArrayList();
217:                for (Iterator i = selections.iterator(); i.hasNext();) {
218:                    AbstractSelection selection = (AbstractSelection) i.next();
219:                    selectedItems.addAll(selection.getSelectedItems(layer,
220:                            feature));
221:                }
222:                return selectedItems;
223:            }
224:
225:            /**
226:             * @param geometry the feature's Geometry or equivalent; that is, a clone or
227:             * similar enough Geometry from which Geometries can be retrieved using
228:             * the selection indices
229:             */
230:            public Collection getSelectedItems(Layer layer, Feature feature,
231:                    Geometry geometry) {
232:                ArrayList selectedItems = new ArrayList();
233:                for (Iterator i = selections.iterator(); i.hasNext();) {
234:                    AbstractSelection selection = (AbstractSelection) i.next();
235:                    selectedItems.addAll(selection.getSelectedItems(layer,
236:                            feature, geometry));
237:                }
238:                return selectedItems;
239:            }
240:
241:            public Collection getLayersWithSelectedItems() {
242:                HashSet layersWithSelectedItems = new HashSet();
243:                for (Iterator i = selections.iterator(); i.hasNext();) {
244:                    AbstractSelection selection = (AbstractSelection) i.next();
245:                    layersWithSelectedItems.addAll(selection
246:                            .getLayersWithSelectedItems());
247:                }
248:                return layersWithSelectedItems;
249:            }
250:
251:            public PartSelection getPartSelection() {
252:                return partSelection;
253:            }
254:
255:            public void updatePanel() {
256:                if (!panelUpdatesEnabled) {
257:                    return;
258:                }
259:                panel.fireSelectionChanged();
260:                panel.getRenderingManager().render(
261:                        SelectionBackgroundRenderer.CONTENT_ID);
262:                for (Iterator i = selections.iterator(); i.hasNext();) {
263:                    AbstractSelection selection = (AbstractSelection) i.next();
264:                    panel.getRenderingManager().render(
265:                            selection.getRendererContentID());
266:                }
267:            }
268:
269:            public void setPanelUpdatesEnabled(boolean panelUpdatesEnabled) {
270:                this .panelUpdatesEnabled = panelUpdatesEnabled;
271:            }
272:
273:            public Collection getFeaturesWithSelectedItems(Layer layer) {
274:                HashSet featuresWithSelectedItems = new HashSet();
275:                for (Iterator i = selections.iterator(); i.hasNext();) {
276:                    AbstractSelection selection = (AbstractSelection) i.next();
277:                    featuresWithSelectedItems.addAll(selection
278:                            .getFeaturesWithSelectedItems(layer));
279:                }
280:                return featuresWithSelectedItems;
281:            }
282:
283:            public void unselectItems(Layer layer) {
284:                boolean originalPanelUpdatesEnabled = arePanelUpdatesEnabled();
285:                setPanelUpdatesEnabled(false);
286:                try {
287:                    for (Iterator i = selections.iterator(); i.hasNext();) {
288:                        AbstractSelection selection = (AbstractSelection) i
289:                                .next();
290:                        selection.unselectItems(layer);
291:                    }
292:                } finally {
293:                    setPanelUpdatesEnabled(originalPanelUpdatesEnabled);
294:                }
295:                updatePanel();
296:            }
297:
298:            public void unselectItems(Layer layer, Collection features) {
299:                boolean originalPanelUpdatesEnabled = arePanelUpdatesEnabled();
300:                setPanelUpdatesEnabled(false);
301:                try {
302:                    for (Iterator i = selections.iterator(); i.hasNext();) {
303:                        AbstractSelection selection = (AbstractSelection) i
304:                                .next();
305:                        selection.unselectItems(layer, features);
306:                    }
307:                } finally {
308:                    setPanelUpdatesEnabled(originalPanelUpdatesEnabled);
309:                }
310:                updatePanel();
311:            }
312:
313:            public void unselectFromFeaturesWithModifiedItemCounts(Layer layer,
314:                    Collection features, Collection oldFeatureClones) {
315:                boolean originalPanelUpdatesEnabled = arePanelUpdatesEnabled();
316:                setPanelUpdatesEnabled(false);
317:                try {
318:                    for (Iterator i = selections.iterator(); i.hasNext();) {
319:                        AbstractSelection selection = (AbstractSelection) i
320:                                .next();
321:                        selection.unselectFromFeaturesWithModifiedItemCounts(
322:                                layer, features, oldFeatureClones);
323:                    }
324:                } finally {
325:                    setPanelUpdatesEnabled(originalPanelUpdatesEnabled);
326:                }
327:                updatePanel();
328:            }
329:
330:            public Collection getFeaturesWithSelectedItems() {
331:                ArrayList featuresWithSelectedItems = new ArrayList();
332:                for (Iterator i = getLayersWithSelectedItems().iterator(); i
333:                        .hasNext();) {
334:                    Layer layer = (Layer) i.next();
335:                    featuresWithSelectedItems
336:                            .addAll(getFeaturesWithSelectedItems(layer));
337:                }
338:                return featuresWithSelectedItems;
339:            }
340:
341:            public boolean arePanelUpdatesEnabled() {
342:                return panelUpdatesEnabled;
343:            }
344:
345:            public void dispose() {
346:                layerManagerProxy.getLayerManager().removeLayerListener(
347:                        layerListener);
348:            }
349:
350:        }
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