svn-gvsig-desktop / branches / v2_0_0_prep / libraries / libFMap_mapcontext / src / org / gvsig / fmap / mapcontext / rendering / strategies / SelectedEnvelopeVisitor.java @ 39511
History | View | Annotate | Download (6.17 KB)
1 |
/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
|
---|---|
2 |
*
|
3 |
* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
|
4 |
*
|
5 |
* This program is free software; you can redistribute it and/or
|
6 |
* modify it under the terms of the GNU General Public License
|
7 |
* as published by the Free Software Foundation; either version 2
|
8 |
* of the License, or (at your option) any later version.
|
9 |
*
|
10 |
* This program is distributed in the hope that it will be useful,
|
11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
13 |
* GNU General Public License for more details.
|
14 |
*
|
15 |
* You should have received a copy of the GNU General Public License
|
16 |
* along with this program; if not, write to the Free Software
|
17 |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
|
18 |
*
|
19 |
* For more information, contact:
|
20 |
*
|
21 |
* Generalitat Valenciana
|
22 |
* Conselleria d'Infraestructures i Transport
|
23 |
* Av. Blasco Ib??ez, 50
|
24 |
* 46010 VALENCIA
|
25 |
* SPAIN
|
26 |
*
|
27 |
* +34 963862235
|
28 |
* gvsig@gva.es
|
29 |
* www.gvsig.gva.es
|
30 |
*
|
31 |
* or
|
32 |
*
|
33 |
* IVER T.I. S.A
|
34 |
* Salamanca 50
|
35 |
* 46005 Valencia
|
36 |
* Spain
|
37 |
*
|
38 |
* +34 963163400
|
39 |
* dac@iver.es
|
40 |
*/
|
41 |
package org.gvsig.fmap.mapcontext.rendering.strategies; |
42 |
|
43 |
import org.cresques.cts.ICoordTrans; |
44 |
import org.slf4j.Logger; |
45 |
import org.slf4j.LoggerFactory; |
46 |
|
47 |
import org.gvsig.fmap.dal.DataSet; |
48 |
import org.gvsig.fmap.dal.feature.Feature; |
49 |
import org.gvsig.fmap.dal.feature.FeatureSelection; |
50 |
import org.gvsig.fmap.geom.primitive.Envelope; |
51 |
import org.gvsig.fmap.mapcontext.layers.FLayer; |
52 |
import org.gvsig.fmap.mapcontext.layers.operations.LayersVisitor; |
53 |
import org.gvsig.fmap.mapcontext.layers.operations.SingleLayer; |
54 |
import org.gvsig.fmap.mapcontext.layers.vectorial.FLyrVect; |
55 |
import org.gvsig.tools.dispose.DisposableIterator; |
56 |
import org.gvsig.tools.exception.BaseException; |
57 |
import org.gvsig.tools.visitor.NotSupportedOperationException; |
58 |
|
59 |
/**
|
60 |
* This visitor accumulates the envelope of the
|
61 |
* selected geometries
|
62 |
*/
|
63 |
public class SelectedEnvelopeVisitor implements LayersVisitor { |
64 |
|
65 |
private static final Logger logger = |
66 |
LoggerFactory.getLogger(SelectedEnvelopeVisitor.class); |
67 |
|
68 |
private Envelope rectangle = null; |
69 |
public Envelope getSelectioEnvelope() {
|
70 |
return rectangle;
|
71 |
} |
72 |
|
73 |
public String getProcessDescription() { |
74 |
return "Defining rectangle to zoom from selected geometries"; |
75 |
} |
76 |
|
77 |
public void visit(Object obj) throws BaseException { |
78 |
if (obj instanceof FLayer) { |
79 |
this.visit((FLayer) obj);
|
80 |
} else {
|
81 |
throw new NotSupportedOperationException(this, obj); |
82 |
} |
83 |
} |
84 |
|
85 |
public void visit(FLayer layer) throws BaseException { |
86 |
|
87 |
if (!(layer instanceof SingleLayer)) { |
88 |
return;
|
89 |
} else if (!layer.isActive()) { |
90 |
return;
|
91 |
} else if (!(layer instanceof FLyrVect)) { |
92 |
return;
|
93 |
} |
94 |
|
95 |
FLyrVect lyr_vect = (FLyrVect) layer; |
96 |
BaseException be = null;
|
97 |
|
98 |
DataSet selection = ((SingleLayer) layer).getDataStore() |
99 |
.getSelection(); |
100 |
|
101 |
if (selection != null && (selection instanceof FeatureSelection)) { |
102 |
|
103 |
long tot_count = lyr_vect.getFeatureStore().getFeatureCount();
|
104 |
FeatureSelection fsel = (FeatureSelection) selection; |
105 |
long sel_count = fsel.getSize();
|
106 |
if (tot_count == sel_count) {
|
107 |
try {
|
108 |
/*
|
109 |
* If all selected, use layer envelope
|
110 |
*/
|
111 |
rectangle = accum(rectangle, lyr_vect.getFullEnvelope(), null);
|
112 |
} catch (CloneNotSupportedException ex) { |
113 |
/*
|
114 |
* This should not happen because
|
115 |
* envelopes support clone
|
116 |
*/
|
117 |
logger.debug("Error while adding envelope: " + ex.getMessage(), ex);
|
118 |
} |
119 |
} else {
|
120 |
|
121 |
/*
|
122 |
* We'll use this reprojection if not null
|
123 |
* to convert feature envelopes
|
124 |
*/
|
125 |
ICoordTrans ct = lyr_vect.getCoordTrans(); |
126 |
|
127 |
DisposableIterator iter = fsel.fastIterator(); |
128 |
Feature feat = null;
|
129 |
while (iter.hasNext()) {
|
130 |
feat = (Feature) iter.next(); |
131 |
try {
|
132 |
rectangle = accum( |
133 |
rectangle, feat.getDefaultEnvelope(), ct); |
134 |
} catch (CloneNotSupportedException ex) { |
135 |
/*
|
136 |
* This should not happen because
|
137 |
* envelopes support clone
|
138 |
*/
|
139 |
logger.debug("Error while adding envelope: " + ex.getMessage(), ex);
|
140 |
break;
|
141 |
} |
142 |
} |
143 |
iter.dispose(); |
144 |
} |
145 |
} |
146 |
} |
147 |
|
148 |
/**
|
149 |
* Adds add_env envelope to ini_env after reprojecting add_env
|
150 |
* if cotr not null
|
151 |
*
|
152 |
* @param ini_env
|
153 |
* @param add_env
|
154 |
* @param cotr
|
155 |
* @return
|
156 |
*/
|
157 |
private Envelope accum(
|
158 |
Envelope ini_env, |
159 |
Envelope add_env, |
160 |
ICoordTrans cotr) throws CloneNotSupportedException { |
161 |
|
162 |
if (add_env == null) { |
163 |
/*
|
164 |
* Nothing to add
|
165 |
*/
|
166 |
return ini_env;
|
167 |
} else {
|
168 |
|
169 |
if (cotr == null) { |
170 |
|
171 |
/*
|
172 |
* No reprojection needed
|
173 |
*/
|
174 |
if (ini_env == null) { |
175 |
return add_env;
|
176 |
} else {
|
177 |
Envelope resp = (Envelope) ini_env.clone(); |
178 |
resp.add(add_env); |
179 |
return resp;
|
180 |
} |
181 |
|
182 |
} else {
|
183 |
|
184 |
/*
|
185 |
* Reproject before adding
|
186 |
*/
|
187 |
Envelope add_rep = (Envelope) add_env.convert(cotr).clone(); |
188 |
if (ini_env == null) { |
189 |
/*
|
190 |
* Initial was null
|
191 |
*/
|
192 |
return add_rep;
|
193 |
} else {
|
194 |
Envelope resp = (Envelope) ini_env.clone(); |
195 |
resp.add(add_rep); |
196 |
return resp;
|
197 |
} |
198 |
} |
199 |
} |
200 |
} |
201 |
|
202 |
|
203 |
} |