root / branches / v2_0_0_prep / libFMap_mapcontext / src / org / gvsig / fmap / mapcontext / rendering / symbols / CartographicSupportToolkit.java @ 21200
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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) 2005 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 org.gvsig.fmap.mapcontext.rendering.symbols; |
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import org.gvsig.fmap.mapcontext.MapContext; |
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import org.gvsig.fmap.mapcontext.ViewPort; |
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/**
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* @author jaume dominguez faus - jaume.dominguez@iver.es
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*/
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public class CartographicSupportToolkit { |
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public static double getCartographicLength(CartographicSupport cartographicElement, double length, ViewPort viewPort, double dpi) { |
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int unit = cartographicElement.getUnit();
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double lengthInPixel = length;
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if (unit != -1) { |
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double[] trans2Meter=MapContext.getDistanceTrans2Meter(); |
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if (cartographicElement.getReferenceSystem() == CartographicSupport.WORLD) {
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double dist1PixelInMeters = viewPort.getDist1pixel()*trans2Meter[viewPort.getMapUnits()];
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double realWidthMeter = length*trans2Meter[unit];
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lengthInPixel = realWidthMeter/dist1PixelInMeters; |
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} else if (cartographicElement.getReferenceSystem() == CartographicSupport.PAPER) { |
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double lengthInInches = 1/trans2Meter[7]*trans2Meter[unit]*length; |
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lengthInPixel = lengthInInches*dpi; |
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} |
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} // otherwise, size is in pixel and no calculus is needed
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return (lengthInPixel);
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} |
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/**
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* The unit that will be used when creating new symbols.<br>
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* <b>Factory defaults to pixel.</b>
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*/
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public static int DefaultMeasureUnit = -1; |
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/**
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* The reference system that will be used when creating new symbols.<br>
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* <b>Factory defaults to pixel.</b>
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*/
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public static int DefaultReferenceSystem = CartographicSupport.WORLD; |
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} |
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