svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.plugin / org.gvsig.snapping.app / org.gvsig.snapping.app.mainplugin / src / main / java / org / gvsig / app / project / documents / view / toolListeners / snapping / snappers / NearestPointSnapper.java @ 44135
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1 | 42037 | fdiaz | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2013 gvSIG Association.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 3
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | package org.gvsig.app.project.documents.view.toolListeners.snapping.snappers; |
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25 | |||
26 | import java.awt.geom.PathIterator; |
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27 | import java.awt.geom.Point2D; |
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28 | |||
29 | import org.gvsig.fmap.geom.Geometry; |
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30 | import org.gvsig.fmap.mapcontrol.PrimitivesDrawer; |
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31 | import org.gvsig.fmap.mapcontrol.tools.snapping.snappers.ISnapperVectorial; |
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32 | import org.gvsig.fmap.mapcontrol.tools.snapping.snappers.impl.AbstractSnapper; |
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33 | import org.gvsig.i18n.Messages; |
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34 | |||
35 | import com.vividsolutions.jts.geom.Coordinate; |
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36 | import com.vividsolutions.jts.geom.LineSegment; |
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37 | |||
38 | public class NearestPointSnapper extends AbstractSnapper implements ISnapperVectorial { |
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39 | public Point2D getSnapPoint(Point2D point, Geometry geom, double tolerance, Point2D lastPointEntered) { |
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40 | Point2D resul = null; |
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41 | Coordinate c = new Coordinate(point.getX(), point.getY());
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42 | |||
43 | PathIterator theIterator = geom.getPathIterator(null, geomManager.getFlatness()); //polyLine.getPathIterator(null, flatness); |
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44 | double[] theData = new double[6]; |
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45 | double minDist = tolerance;
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46 | Coordinate from = null, first = null; |
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47 | while (!theIterator.isDone()) {
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48 | //while not done
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49 | int theType = theIterator.currentSegment(theData);
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50 | |||
51 | switch (theType) {
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52 | case PathIterator.SEG_MOVETO: |
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53 | from = new Coordinate(theData[0], theData[1]); |
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54 | first = from; |
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55 | break;
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56 | |||
57 | case PathIterator.SEG_LINETO: |
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58 | |||
59 | // System.out.println("SEG_LINETO");
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60 | Coordinate to = new Coordinate(theData[0], theData[1]); |
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61 | LineSegment line = new LineSegment(from, to);
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62 | Coordinate closestPoint = line.closestPoint(c); |
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63 | double dist = c.distance(closestPoint);
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64 | if ((dist < minDist)) {
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65 | resul = new Point2D.Double(closestPoint.x, closestPoint.y); |
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66 | minDist = dist; |
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67 | } |
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68 | |||
69 | from = to; |
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70 | break;
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71 | case PathIterator.SEG_CLOSE: |
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72 | line = new LineSegment(from, first);
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73 | closestPoint = line.closestPoint(c); |
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74 | dist = c.distance(closestPoint); |
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75 | if ((dist < minDist)) {
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76 | resul = new Point2D.Double(closestPoint.x, closestPoint.y); |
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77 | minDist = dist; |
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78 | } |
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79 | |||
80 | from = first; |
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81 | break;
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82 | |||
83 | |||
84 | } //end switch
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85 | |||
86 | theIterator.next(); |
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87 | } |
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88 | |||
89 | return resul;
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90 | } |
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91 | |||
92 | public String getToolTipText() { |
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93 | return Messages.getText("Nearest_point"); |
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94 | } |
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95 | |||
96 | /*
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97 | * (non-Javadoc)
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98 | * @see org.gvsig.fmap.mapcontrol.tools.snapping.snappers.ISnapper#draw(org.gvsig.fmap.mapcontrol.PrimitivesDrawer, java.awt.geom.Point2D)
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99 | */
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100 | public void draw(PrimitivesDrawer primitivesDrawer, Point2D pPixels) { |
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101 | primitivesDrawer.setColor(getColor()); |
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102 | int half = getSizePixels() / 2; |
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103 | int x1 = (int) (pPixels.getX() - half); |
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104 | int x2 = (int) (pPixels.getX() + half); |
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105 | int y1 = (int) (pPixels.getY() - half); |
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106 | int y2 = (int) (pPixels.getY() + half); |
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107 | |||
108 | primitivesDrawer.drawLine(x1, y1, x2, y1); // abajo
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109 | primitivesDrawer.drawLine(x1, y2, x2, y2); // arriba
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110 | primitivesDrawer.drawLine(x1, y1, x2, y2); // abajo - arriba
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111 | primitivesDrawer.drawLine(x1, y2, x2, y1); // arriba - abajo
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112 | } |
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113 | } |