geotools/selection/ChartSelectionSynchronizer.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, focussing (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
 ******************************************************************************/
package skrueger.geotools.selection;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Vector;

import org.jfree.data.general.Dataset;

import schmitzm.jfree.chart.renderer.SelectionRenderer;
import schmitzm.jfree.chart.selection.DatasetSelectionChangeEvent;
import schmitzm.jfree.chart.selection.DatasetSelectionListener;
import schmitzm.jfree.chart.selection.DatasetSelectionModel;
import schmitzm.jfree.chart.selection.DatasetSelectionModelProvider;
import schmitzm.jfree.feature.FeatureDatasetSelectionModel;

/**
 * This class keeps the selection of a {@link Dataset} (based on feature
 * attributes) 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 SelectionRenderer}
 * selection</li>
 * <li>a {@link DatasetSelectionModel} which listens to the {@link SelectionRenderer} 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 chart's
 * {@link DatasetSelectionModel} (e.g. the renderer).
 * @see DatasetSelectionModelProvider
 * @author <a href="mailto:[email protected]">Martin Schmitz</a>
 */
public class ChartSelectionSynchronizer extends StyledLayerSelectionModelSynchronizer<StyledFeatureLayerSelectionModel>
                                        implements DatasetSelectionListener {

  /** Holds the chart datset to keep synchronized with the layer selection model. */
  protected FeatureDatasetSelectionModel<?> datasetSelModel = null;

  /**
   * Creates a new synchronizer.
   * @param layerSelModel
   *             layer selection model to keep synchronized with the dataset
   *             selection model
   * @param datasetSelModel
   *            dataset selection model to keep synchronized with the layer
   *            selection model
   */
  public ChartSelectionSynchronizer(StyledFeatureLayerSelectionModel layerSelModel, FeatureDatasetSelectionModel<?> datasetSelModel) {
    super(layerSelModel);
    this.datasetSelModel = datasetSelModel;
  }

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

    datasetSelModel.setValueIsAdjusting(true);
    datasetSelModel.clearSelection();
    for (String fID : newSelection)
      datasetSelModel.setItemSelected(fID, true);
    datasetSelModel.setValueIsAdjusting(false); // event is fired autmatically!

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

  /**
   * Called when the chart selection is changed by the user. When calling this
   * method changes the selection of the {@link StyledLayerSelectionModel}.
   * @param evt an event
   */
  @Override
  public void selectionChanged(DatasetSelectionChangeEvent evt) {
    // ignore event if it is part of multiple events
    if (evt != null && evt.getSource().getValueIsAdjusting())
        return;
    // ignore event if it is caused by the ChartSelectionSynchronizer
    if (selectionChangeCausedByMe)
        return;

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

    // reset the selection of the DpLayerSelectionModel
    layerSelModel.setValueIsAdjusting(true);
    layerSelModel.clearSelection();
    for (String featureID : datasetSelModel.getSelectedFeatures())
      layerSelModel.addSelection(featureID);
    layerSelModel.setValueIsAdjusting(false);

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

}
1	alfonx	244	/*******************************************************************************
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, focussing (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			package skrueger.geotools.selection;
31
32			import java.beans.PropertyChangeEvent;
33			import java.beans.PropertyChangeListener;
34			import java.util.Vector;
35
36			import org.jfree.data.general.Dataset;
37
38			import schmitzm.jfree.chart.renderer.SelectionRenderer;
39			import schmitzm.jfree.chart.selection.DatasetSelectionChangeEvent;
40			import schmitzm.jfree.chart.selection.DatasetSelectionListener;
41			import schmitzm.jfree.chart.selection.DatasetSelectionModel;
42			import schmitzm.jfree.chart.selection.DatasetSelectionModelProvider;
43			import schmitzm.jfree.feature.FeatureDatasetSelectionModel;
44
45			/**
46			* This class keeps the selection of a {@link Dataset} (based on feature
47			* attributes) synchronized with the {@link StyledLayerSelectionModel} of a layer.
48			* This is done by implementing:
49			* <ul>
50			* <li>a {@link PropertyChangeListener} which listens to the
51			* {@link StyledLayerSelectionModel} and accordingly changes the {@link SelectionRenderer}
52			* selection</li>
53			* <li>a {@link DatasetSelectionModel} which listens to the {@link SelectionRenderer} and
54			* accordingly changes the {@link StyledLayerSelectionModel} selection</li>
55			* </ul>
56			* After creating, the instance of this synchronizer must be added as listener
57			* to both, the {@link StyledLayerSelectionModel} and the chart's
58			* {@link DatasetSelectionModel} (e.g. the renderer).
59			* @see DatasetSelectionModelProvider
60			* @author <a href="mailto:[email protected]">Martin Schmitz</a>
61			*/
62			public class ChartSelectionSynchronizer extends StyledLayerSelectionModelSynchronizer<StyledFeatureLayerSelectionModel>
63			implements DatasetSelectionListener {
64
65			/** Holds the chart datset to keep synchronized with the layer selection model. */
66			protected FeatureDatasetSelectionModel<?> datasetSelModel = null;
67
68			/**
69			* Creates a new synchronizer.
70			* @param layerSelModel
71			* layer selection model to keep synchronized with the dataset
72			* selection model
73			* @param datasetSelModel
74			* dataset selection model to keep synchronized with the layer
75			* selection model
76			*/
77			public ChartSelectionSynchronizer(StyledFeatureLayerSelectionModel layerSelModel, FeatureDatasetSelectionModel<?> datasetSelModel) {
78			super(layerSelModel);
79			this.datasetSelModel = datasetSelModel;
80			}
81
82			/**
83			* Called by {@link StyledLayerSelectionModel} when the selection on other
84			* selection components (map, table, ...) has changed. When calling this
85			* method changes the dataset selection according to the
86			* {@link StyledLayerSelectionModel} selection.
87			* @param evt an event
88			*/
89			@Override
90			public void propertyChange(PropertyChangeEvent evt) {
91			if (!(evt instanceof StyledLayerSelectionEvent))
92			return;
93			StyledLayerSelectionEvent selEvt = (StyledLayerSelectionEvent) evt;
94			// Only react on own layer and ignore events invoked by
95			// this component itself
96			if (selEvt.getEmitter() != layerSelModel \|\| selectionChangeCausedByMe)
97			return;
98			// Apply new selection on chart (except this event is one of
99			// some more events)
100			Vector<String> newSelection = layerSelModel.getSelection();
101			if (newSelection == null)
102			return;
103
104			// Avoid event circles in valueChanged(..)
105			selectionChangeCausedByMe = true;
106
107			datasetSelModel.setValueIsAdjusting(true);
108			datasetSelModel.clearSelection();
109			for (String fID : newSelection)
110			datasetSelModel.setItemSelected(fID, true);
111			datasetSelModel.setValueIsAdjusting(false); // event is fired autmatically!
112
113			// Danger of event circles in valueChanged(..) banned
114			selectionChangeCausedByMe = false;
115			}
116
117			/**
118			* Called when the chart selection is changed by the user. When calling this
119			* method changes the selection of the {@link StyledLayerSelectionModel}.
120			* @param evt an event
121			*/
122			@Override
123			public void selectionChanged(DatasetSelectionChangeEvent evt) {
124			// ignore event if it is part of multiple events
125			if (evt != null && evt.getSource().getValueIsAdjusting())
126			return;
127			// ignore event if it is caused by the ChartSelectionSynchronizer
128			if (selectionChangeCausedByMe)
129			return;
130
131			// Avoid event circles in propertyChange(..)
132			selectionChangeCausedByMe = true;
133
134			// reset the selection of the DpLayerSelectionModel
135			layerSelModel.setValueIsAdjusting(true);
136			layerSelModel.clearSelection();
137			for (String featureID : datasetSelModel.getSelectedFeatures())
138			layerSelModel.addSelection(featureID);
139			layerSelModel.setValueIsAdjusting(false);
140
141			// Danger of event circles in propertyChange(..) banned
142			selectionChangeCausedByMe = false;
143			}
144
145
146			}