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, 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
 ******************************************************************************/
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 (!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 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	/*******************************************************************************
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	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
92	if (!isEnabled())
93	return;
94
95	if (!(evt instanceof StyledLayerSelectionEvent))
96	return;
97	StyledLayerSelectionEvent selEvt = (StyledLayerSelectionEvent) evt;
98	// Only react on own layer and ignore events invoked by
99	// this component itself
100	if (selEvt.getEmitter() != layerSelModel \|\| selectionChangeCausedByMe)
101	return;
102	// Apply new selection on chart (except this event is one of
103	// some more events)
104	Vector<String> newSelection = layerSelModel.getSelection();
105	if (newSelection == null)
106	return;
107
108	// Avoid event circles in valueChanged(..)
109	selectionChangeCausedByMe = true;
110
111	datasetSelModel.setValueIsAdjusting(true);
112	datasetSelModel.clearSelection();
113	for (String fID : newSelection)
114	datasetSelModel.setItemSelected(fID, true);
115	datasetSelModel.setValueIsAdjusting(false); // event is fired autmatically!
116
117	// Danger of event circles in valueChanged(..) banned
118	selectionChangeCausedByMe = false;
119	}
120
121	/**
122	* Called when the chart selection is changed by the user. When calling this
123	* method changes the selection of the {@link StyledLayerSelectionModel}.
124	* @param evt an event
125	*/
126	@Override
127	public void selectionChanged(DatasetSelectionChangeEvent evt) {
128	// ignore event if it is part of multiple events
129	if (evt != null && evt.getSource().getValueIsAdjusting())
130	return;
131	// ignore event if it is caused by the ChartSelectionSynchronizer
132	if (selectionChangeCausedByMe)
133	return;
134
135	// Avoid event circles in propertyChange(..)
136	selectionChangeCausedByMe = true;
137
138	// reset the selection of the DpLayerSelectionModel
139	layerSelModel.setValueIsAdjusting(true);
140	layerSelModel.clearSelection();
141	for (String featureID : datasetSelModel.getSelectedFeatures())
142	layerSelModel.addSelection(featureID);
143	layerSelModel.setValueIsAdjusting(false);
144
145	// Danger of event circles in propertyChange(..) banned
146	selectionChangeCausedByMe = false;
147	}
148
149
150	}