svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.mapcontext / org.gvsig.fmap.mapcontext.api / src / main / java / org / gvsig / fmap / mapcontext / rendering / strategies / SelectedZoomVisitor.java @ 40559
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | 40435 | jjdelcerro | *
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4 | 40559 | jjdelcerro | * Copyright (C) 2007-2013 gvSIG Association.
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5 | 40435 | jjdelcerro | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | 40559 | jjdelcerro | * as published by the Free Software Foundation; either version 3
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9 | 40435 | jjdelcerro | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | 40559 | jjdelcerro | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | 40435 | jjdelcerro | *
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21 | 40559 | jjdelcerro | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | 40435 | jjdelcerro | */
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24 | package org.gvsig.fmap.mapcontext.rendering.strategies; |
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25 | |||
26 | import org.gvsig.fmap.dal.DataSet; |
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27 | import org.gvsig.fmap.dal.feature.Feature; |
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28 | import org.gvsig.fmap.dal.feature.FeatureReference; |
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29 | import org.gvsig.fmap.geom.primitive.Envelope; |
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30 | import org.gvsig.fmap.mapcontext.layers.FLayer; |
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31 | import org.gvsig.fmap.mapcontext.layers.operations.LayersVisitor; |
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32 | import org.gvsig.fmap.mapcontext.layers.operations.SingleLayer; |
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33 | import org.gvsig.tools.exception.BaseException; |
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34 | import org.gvsig.tools.visitor.NotSupportedOperationException; |
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35 | import org.gvsig.tools.visitor.Visitable; |
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36 | import org.gvsig.tools.visitor.Visitor; |
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37 | |||
38 | |||
39 | /**
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40 | * Visitor de zoom a lo seleccionado.
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41 | *
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42 | * @author Vicente Caballero Navarro
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43 | */
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44 | public class SelectedZoomVisitor implements LayersVisitor, Visitor { |
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45 | private Envelope rectangle = null; |
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46 | |||
47 | /**
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48 | * Devuelve el Extent de los shapes seleccionados, y si no hay ning?n shape
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49 | * seleccionado devuelve null.
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50 | *
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51 | * @return Extent de los shapes seleccionados.
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52 | */
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53 | public Envelope getSelectBound() {
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54 | return rectangle;
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55 | } |
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56 | |||
57 | public String getProcessDescription() { |
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58 | return "Defining rectangle to zoom from selected geometries"; |
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59 | } |
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60 | |||
61 | public void visit(Feature feature) throws BaseException { |
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62 | if (rectangle == null) { |
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63 | rectangle = (feature.getDefaultGeometry()).getEnvelope(); |
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64 | } else {
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65 | rectangle.add((feature.getDefaultGeometry()) |
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66 | .getEnvelope()); |
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67 | } |
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68 | } |
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69 | |||
70 | public void visit(FeatureReference featureRefence) throws BaseException { |
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71 | this.visit(featureRefence.getFeature());
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72 | } |
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73 | |||
74 | public void visit(Object obj) throws BaseException { |
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75 | if (obj instanceof FeatureReference) { |
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76 | this.visit((FeatureReference) obj);
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77 | return;
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78 | } |
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79 | if (obj instanceof Feature) { |
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80 | this.visit((Feature) obj);
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81 | return;
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82 | } |
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83 | if (obj instanceof FLayer) { |
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84 | this.visit((FLayer) obj);
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85 | return;
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86 | } |
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87 | |||
88 | throw new NotSupportedOperationException(this, obj); |
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89 | } |
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90 | |||
91 | public void visit(FLayer layer) throws BaseException { |
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92 | if (!(layer instanceof SingleLayer)) { |
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93 | return;
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94 | } else if (!layer.isActive()) { |
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95 | return;
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96 | } |
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97 | DataSet selection = ((SingleLayer) layer).getDataStore() |
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98 | .getSelection(); |
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99 | |||
100 | if (selection instanceof Visitable) { |
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101 | ((Visitable) selection).accept(this);
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102 | } |
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103 | } |
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104 | |||
105 | |||
106 | } |