svn-gvsig-desktop / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / operations / strategies / SelectedZoomVisitor.java @ 1085
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package com.iver.cit.gvsig.fmap.operations.strategies; |
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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.Selectable; |
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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 Selectable) { |
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bitset = ((Selectable) layer).getSelection(); |
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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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} |