root / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / tools / ZoomOutListenerImpl.java @ 24160
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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.tools; |
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import java.awt.Cursor; |
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import java.awt.Image; |
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import java.awt.Point; |
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import java.awt.Toolkit; |
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import java.awt.geom.Point2D; |
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import java.awt.geom.Rectangle2D; |
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import javax.swing.ImageIcon; |
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import com.iver.cit.gvsig.fmap.MapContext; |
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import com.iver.cit.gvsig.fmap.MapControl; |
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import com.iver.cit.gvsig.fmap.ViewPort; |
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import com.iver.cit.gvsig.fmap.tools.Events.PointEvent; |
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import com.iver.cit.gvsig.fmap.tools.Listeners.PointListener; |
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/**
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* <p>Listener for doing a <i>zoom out</i> operation on the extent of the <code>ViewPort</code> of the associated {@link MapControl MapControl}
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* object, selecting a point of the <code>MapControl</code> by a single click of any mouse's button.</p>
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*
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* <p>Calculates the new extent <i>r</i> with this equations:
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* <code><br>
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* ViewPort vp = mapControl.getMapContext().getViewPort();<br>
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* Point2D p2 = vp.toMapPoint(event.getPoint());<br>
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* double factor = 1/MapContext.ZOOMOUTFACTOR;<br>
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* Rectangle2D.Double r = new Rectangle2D.Double();<br>
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* double nuevoX = p2.getX() - ((vp.getExtent().getWidth() * factor) / 2.0);<br>
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* double nuevoY = p2.getY() - ((vp.getExtent().getHeight() * factor) / 2.0);<br>
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* r.x = nuevoX;<br>
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* r.y = nuevoY;<br>
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* r.width = vp.getExtent().getWidth() * factor;<br>
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* r.height = vp.getExtent().getHeight() * factor;<br>
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* vp.setExtent(r);
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* </code>
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* </p>
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*
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* <p>The ultimately extent will be an adaptation from that, calculated by the <code>ViewPort</code>
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* bearing in mind the ratio of the available rectangle.</p>
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*
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* @see MapContext#ZOOMOUTFACTOR
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* @see ViewPort#setExtent(Rectangle2D)
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* @see ZoomInListenerImpl
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* @see ZoomOutRightButtonListener
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*
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* @author Vicente Caballero Navarro
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*/
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public class ZoomOutListenerImpl implements PointListener { |
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/**
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* The image to display when the cursor is active.
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*/
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private final Image izoomout = new ImageIcon(MapControl.class.getResource( |
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"images/ZoomOutCursor.gif")).getImage();
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/**
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* The cursor used to work with this tool listener.
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*
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* @see #getCursor()
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*/
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private Cursor cur = Toolkit.getDefaultToolkit().createCustomCursor(izoomout, |
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new Point(16, 16), ""); |
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/**
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* Reference to the <code>MapControl</code> object that uses.
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*/
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private MapControl mapControl;
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/**
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* <p>Creates a new <code>ZoomOutListenerImpl</code> object.</p>
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*
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* @param mapControl the <code>MapControl</code> where will be applied the changes
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*/
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public ZoomOutListenerImpl(MapControl mapControl) {
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this.mapControl = mapControl;
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} |
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/*
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* (non-Javadoc)
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* @see com.iver.cit.gvsig.fmap.tools.Listeners.PointListener#point(com.iver.cit.gvsig.fmap.tools.Events.PointEvent)
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*/
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public void point(PointEvent event) { |
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ViewPort vp = mapControl.getMapContext().getViewPort(); |
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Point2D p2 = vp.toMapPoint(event.getPoint());
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double nuevoX;
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double nuevoY;
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double factor = 1/MapContext.ZOOMOUTFACTOR; |
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Rectangle2D.Double r = new Rectangle2D.Double(); |
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nuevoX = p2.getX() - ((vp.getExtent().getWidth() * factor) / 2.0);
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nuevoY = p2.getY() - ((vp.getExtent().getHeight() * factor) / 2.0);
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r.x = nuevoX; |
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r.y = nuevoY; |
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r.width = vp.getExtent().getWidth() * factor; |
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r.height = vp.getExtent().getHeight() * factor; |
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vp.setExtent(r); |
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// mapControl.getMapContext().clearAllCachingImageDrawnLayers();
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// mapControl.drawMap(false);
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} |
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/*
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* (non-Javadoc)
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* @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#getCursor()
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*/
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public Cursor getCursor() { |
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return cur;
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} |
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/*
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* (non-Javadoc)
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* @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#cancelDrawing()
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*/
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public boolean cancelDrawing() { |
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System.out.println("cancelDrawing del ZoomOutListenerImpl"); |
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return true; |
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} |
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/*
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* (non-Javadoc)
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* @see com.iver.cit.gvsig.fmap.tools.Listeners.PointListener#pointDoubleClick(com.iver.cit.gvsig.fmap.tools.Events.PointEvent)
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*/
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public void pointDoubleClick(PointEvent event) { |
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// TODO Auto-generated method stub
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} |
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} |