svn-gvsig-desktop / tags / v2_0_0_Build_2038 / libraries / libFMap_controls / src / org / gvsig / fmap / mapcontrol / tools / Behavior / MouseWheelBehavior.java @ 36906
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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package org.gvsig.fmap.mapcontrol.tools.Behavior; |
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import java.awt.event.MouseWheelEvent; |
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import org.gvsig.fmap.geom.Geometry.SUBTYPES; |
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import org.gvsig.fmap.geom.exception.CreateEnvelopeException; |
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import org.gvsig.fmap.geom.primitive.Envelope; |
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import org.gvsig.fmap.geom.primitive.Point; |
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import org.gvsig.fmap.mapcontext.ViewPort; |
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import org.gvsig.fmap.mapcontrol.MapControl; |
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import org.gvsig.fmap.mapcontrol.MapControlDrawer; |
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import org.gvsig.fmap.mapcontrol.tools.BehaviorException; |
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import org.gvsig.fmap.mapcontrol.tools.Listeners.ToolListener; |
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/**
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* @author gvSIG Team
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* @version $Id$
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*
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*/
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public class MouseWheelBehavior extends Behavior { |
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/**
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* Constructor.
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*/
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public MouseWheelBehavior() {
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} |
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@Override
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public ToolListener getListener() {
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return null; |
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} |
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@Override
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public void mouseWheelMoved(MouseWheelEvent event) throws BehaviorException { |
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MapControl control = getMapControl(); |
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control.cancelDrawing(); |
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super.mouseWheelMoved(event);
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ViewPort viewPort = control.getViewPort(); |
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Envelope envelope = viewPort.getEnvelope(); |
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if (envelope != null) { |
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double factor = event.getWheelRotation() < 0 ? 0.9d : 1.2d; |
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Point mousePosition = viewPort.convertToMapPoint(event.getPoint());
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Point envelopPoint1 = envelope.getLowerCorner();
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Point envelopPoint2 = envelope.getUpperCorner();
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double width1 = mousePosition.getX() - envelopPoint1.getX();
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double heigth1 = mousePosition.getY() - envelopPoint1.getY();
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double width2 = envelopPoint2.getX() - mousePosition.getX();
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double heigth2 = envelopPoint2.getY() - mousePosition.getY();
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double xmin = mousePosition.getX() - width1 * factor;
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double ymin = mousePosition.getY() - heigth1 * factor;
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double xmax = mousePosition.getX() + width2 * factor;
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double ymax = mousePosition.getY() + heigth2 * factor;
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try {
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viewPort.setEnvelope(geomManager.createEnvelope(xmin, ymin, |
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xmax, ymax, SUBTYPES.GEOM2D)); |
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} catch (CreateEnvelopeException e) {
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throw new BehaviorException( |
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"Error changing the viewport envelope to (" + xmin + "," |
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+ ymin + "),(" + xmax + "," + ymax + ")", e); |
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} |
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getMapControl().drawMap(true);
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} |
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event.consume(); |
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} |
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@Override
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public void paintComponent(MapControlDrawer mapControlDrawer) { |
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// Do nothing
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} |
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} |