svn-gvsig-desktop / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / operations / strategies / SelectedZoomVisitor.java @ 4256
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package com.iver.cit.gvsig.fmap.operations.strategies; |
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import com.iver.cit.gvsig.fmap.DriverException; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.layers.FBitSet; |
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import com.iver.cit.gvsig.fmap.layers.FLayer; |
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import com.iver.cit.gvsig.fmap.layers.layerOperations.AlphanumericData; |
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import java.awt.geom.Rectangle2D; |
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/**
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* Visitor de zoom a lo seleccionado.
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*
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* @author Vicente Caballero Navarro
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*/
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public class SelectedZoomVisitor implements FeatureVisitor { |
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private Rectangle2D rectangle = null; |
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private FBitSet bitset = null; |
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/**
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* Inicializa el visitor.
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*
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* @param layer Capa.
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*
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* @return True si se inicializa correctamente.
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*/
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public boolean start(FLayer layer) { |
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if (layer instanceof AlphanumericData) {//TODO Esta comprobaci?n se hacia con Selectable |
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try {
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bitset = ((AlphanumericData) layer).getRecordset().getSelection(); |
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} catch (DriverException e) {
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e.printStackTrace(); |
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} |
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return true; |
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} |
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return false; |
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} |
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/**
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* Finaliza el visitor.
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*
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* @param layer Capa.
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*/
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public void stop(FLayer layer) { |
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.operations.strategies.FeatureVisitor#visit(com.iver.cit.gvsig.fmap.core.IGeometry,
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* int)
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*/
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public void visit(IGeometry g, int index) throws VisitException { |
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if (bitset.get(index)) {
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if (rectangle == null) { |
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rectangle = (Rectangle2D) g.getBounds2D().clone();
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} else {
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rectangle.add(g.getBounds2D()); |
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} |
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} |
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} |
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/**
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* Devuelve el Extent de los shapes seleccionados, y si no hay ning?n shape
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* seleccionado devuelve null.
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*
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* @return Extent de los shapes seleccionados.
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*/
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public Rectangle2D getSelectBound() { |
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return rectangle;
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} |
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} |