svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.plugin / org.gvsig.labeling.app / org.gvsig.labeling.app.mainplugin / src / main / java / org / gvsig / labeling / placements / AbstractLinePlacement.java @ 40911
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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.labeling.placements; |
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import java.awt.geom.Point2D; |
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import java.awt.geom.Rectangle2D; |
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import java.util.ArrayList; |
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import org.apache.batik.ext.awt.geom.PathLength; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.mapcontext.ViewPort; |
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import org.gvsig.fmap.mapcontext.rendering.legend.styling.ILabelClass; |
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import org.gvsig.fmap.mapcontext.rendering.legend.styling.IPlacementConstraints; |
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import org.gvsig.symbology.fmap.mapcontext.rendering.legend.styling.LabelLocationMetrics; |
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import org.gvsig.tools.task.Cancellable; |
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/**
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*
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* AbstractLinePlacement.java
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*
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*
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* @author jaume dominguez faus - jaume.dominguez@iver.es Dec 17, 2007
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*
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*/
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public abstract class AbstractLinePlacement implements ILabelPlacement { |
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public static final double PI = Math.PI; |
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public static final double HALF_PI = PI * 0.5; |
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private ArrayList<LabelLocationMetrics> guessed = |
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new ArrayList<LabelLocationMetrics>(); |
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private static final double TOLERANCE = 1E-2; |
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public ArrayList<LabelLocationMetrics> guess(ILabelClass lc, Geometry geom, |
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IPlacementConstraints pc, double cartographicSymbolSize,
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Cancellable cancel, ViewPort vp) { |
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guessed.clear(); |
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Geometry shp = geom.cloneGeometry(); |
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shp.transform(vp.getAffineTransform()); |
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PathLength pathLen = new PathLength(shp);
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LabelLocationMetrics initial = initialLocation(lc, pc, pathLen, cancel); |
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if (cancel.isCanceled()) return CannotPlaceLabel.NO_PLACES; |
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double theta = initial.getRotation();
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double xOffset = 0; |
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double yOffset = 0; |
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Rectangle2D bounds = lc.getBounds();
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if (pc.isPageOriented()) {
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if(theta > HALF_PI) { // from origin to left-down |
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theta = (theta - Math.PI);
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Point2D anchor = initial.getAnchor();
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// double cosTheta = Math.cos(theta);
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double sinTheta = Math.sin(theta); |
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double width = bounds.getWidth();
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double height = bounds.getHeight()*1.1; |
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initial.getAnchor().setLocation( |
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anchor.getX()+ (sinTheta*width /* + cosTheta*height*/),
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anchor.getY()- (/*cosTheta*width*/ + sinTheta*height));
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} else if (theta < -HALF_PI ) { // from origin to left-up |
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if (Math.abs(Math.abs(theta) - HALF_PI) -TOLERANCE > 0) |
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// the condition avoids errors when segment is almost up-down vertical
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{ |
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theta = (theta + Math.PI);
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Point2D anchor = initial.getAnchor();
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double cosTheta = Math.cos(theta); |
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double sinTheta = Math.sin(theta); |
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double width = bounds.getWidth();
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double height = bounds.getHeight()*1.1; |
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initial.getAnchor().setLocation( |
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anchor.getX()- (cosTheta*width/* + sinTheta*height*/),
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anchor.getY()- (sinTheta*width + cosTheta*height)); |
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} |
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} |
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} |
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if (pc.isBelowTheLine() ||
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pc.isOnTheLine() || |
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pc.isAboveTheLine()) { |
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double h = bounds.getHeight()*0.5; |
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xOffset += h * Math.sin(theta);
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yOffset += h * Math.cos(theta);
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Point2D initialAnchor = initial.getAnchor();
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// calculate the possibles in the inverse
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// order to the preferred order and add it
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// always in the first position
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if (pc.isBelowTheLine()) {
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Point2D anchor = new Point2D.Double( |
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initialAnchor.getX() + -xOffset, |
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initialAnchor.getY() + +yOffset); |
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guessed.add(0, new LabelLocationMetrics(anchor, theta, false)); |
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} |
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if (pc.isOnTheLine()) {
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guessed.add(0, new LabelLocationMetrics(initial.getAnchor(), theta, false)); |
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} |
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if (pc.isAboveTheLine()) {
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Point2D anchor = new Point2D.Double( |
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initialAnchor.getX() + +xOffset, |
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initialAnchor.getY() + -yOffset); |
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guessed.add(0, new LabelLocationMetrics(anchor, theta, false)); |
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} |
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} else {
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// will say that on the line is legal
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guessed.add(0, initial);
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} |
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return guessed;
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} |
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abstract LabelLocationMetrics initialLocation(
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ILabelClass lc, IPlacementConstraints pc, |
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PathLength pathLen, Cancellable cancel); |
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} |