root / branches / v2_0_0_prep / libraries / libFMap_mapcontext / src / org / gvsig / fmap / mapcontext / SelectedZoomVisitor.java @ 38557
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| 1 | 30011 | cordinyana | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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| 2 | *
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| 3 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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| 4 | *
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| 5 | * This program is free software; you can redistribute it and/or
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| 6 | * modify it under the terms of the GNU General Public License
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| 7 | * as published by the Free Software Foundation; either version 2
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| 8 | * of the License, or (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program; if not, write to the Free Software
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| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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| 18 | *
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| 19 | * For more information, contact:
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| 20 | *
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| 21 | * Generalitat Valenciana
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| 22 | * Conselleria d'Infraestructures i Transport
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| 23 | * Av. Blasco Ib??ez, 50
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| 24 | * 46010 VALENCIA
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| 25 | * SPAIN
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| 26 | *
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| 27 | * +34 963862235
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| 28 | * gvsig@gva.es
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| 29 | * www.gvsig.gva.es
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| 30 | *
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| 31 | * or
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| 32 | *
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| 33 | * IVER T.I. S.A
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| 34 | * Salamanca 50
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| 35 | * 46005 Valencia
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| 36 | * Spain
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| 37 | *
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| 38 | * +34 963163400
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| 39 | * dac@iver.es
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| 40 | */
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| 41 | package org.gvsig.fmap.mapcontext; |
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| 42 | |||
| 43 | import org.gvsig.fmap.dal.DataSet; |
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| 44 | import org.gvsig.fmap.dal.feature.Feature; |
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| 45 | import org.gvsig.fmap.dal.feature.FeatureReference; |
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| 46 | import org.gvsig.fmap.geom.primitive.Envelope; |
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| 47 | import org.gvsig.fmap.mapcontext.layers.FLayer; |
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| 48 | import org.gvsig.fmap.mapcontext.layers.operations.LayersVisitor; |
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| 49 | import org.gvsig.fmap.mapcontext.layers.operations.SingleLayer; |
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| 50 | import org.gvsig.tools.exception.BaseException; |
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| 51 | import org.gvsig.tools.visitor.NotSupportedOperationException; |
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| 52 | import org.gvsig.tools.visitor.Visitable; |
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| 53 | import org.gvsig.tools.visitor.Visitor; |
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| 54 | |||
| 55 | |||
| 56 | /**
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| 57 | * Visitor de zoom a lo seleccionado.
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| 58 | *
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| 59 | * @author Vicente Caballero Navarro
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| 60 | */
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| 61 | public class SelectedZoomVisitor implements LayersVisitor, Visitor { |
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| 62 | private Envelope rectangle = null; |
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| 63 | |||
| 64 | /**
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| 65 | * Devuelve el Extent de los shapes seleccionados, y si no hay ning?n shape
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| 66 | * seleccionado devuelve null.
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| 67 | *
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| 68 | * @return Extent de los shapes seleccionados.
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| 69 | */
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| 70 | public Envelope getSelectBound() {
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| 71 | return rectangle;
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| 72 | } |
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| 73 | |||
| 74 | public String getProcessDescription() { |
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| 75 | return "Defining rectangle to zoom from selected geometries"; |
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| 76 | } |
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| 77 | |||
| 78 | public void visit(Feature feature) throws BaseException { |
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| 79 | if (rectangle == null) { |
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| 80 | rectangle = (feature.getDefaultGeometry()).getEnvelope(); |
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| 81 | } else {
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| 82 | rectangle.add((feature.getDefaultGeometry()) |
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| 83 | .getEnvelope()); |
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| 84 | } |
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| 85 | } |
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| 86 | |||
| 87 | public void visit(FeatureReference featureRefence) throws BaseException { |
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| 88 | this.visit(featureRefence.getFeature());
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| 89 | } |
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| 90 | |||
| 91 | public void visit(Object obj) throws BaseException { |
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| 92 | if (obj instanceof FeatureReference) { |
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| 93 | this.visit((FeatureReference) obj);
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| 94 | return;
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| 95 | } |
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| 96 | if (obj instanceof Feature) { |
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| 97 | this.visit((Feature) obj);
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| 98 | return;
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| 99 | } |
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| 100 | if (obj instanceof FLayer) { |
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| 101 | this.visit((FLayer) obj);
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| 102 | return;
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| 103 | } |
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| 104 | |||
| 105 | throw new NotSupportedOperationException(this, obj); |
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| 106 | } |
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| 107 | |||
| 108 | public void visit(FLayer layer) throws BaseException { |
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| 109 | if (!(layer instanceof SingleLayer)) { |
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| 110 | return;
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| 111 | } else if (!layer.isActive()) { |
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| 112 | return;
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| 113 | } |
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| 114 | DataSet selection = ((SingleLayer) layer).getDataStore() |
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| 115 | .getSelection(); |
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| 116 | |||
| 117 | if (selection instanceof Visitable) { |
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| 118 | ((Visitable) selection).accept(this);
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| 119 | } |
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| 120 | } |
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| 121 | |||
| 122 | |||
| 123 | } |