root / tags / v2_0_0_Build_2047 / applications / appgvSIG / appgvSIG / src / org / gvsig / app / project / documents / view / toolListeners / snapping / snappers / NearestPointSnapper.java @ 38317
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1 | 29598 | jpiera | package org.gvsig.app.project.documents.view.toolListeners.snapping.snappers; |
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2 | 23642 | vcaballero | |
3 | import java.awt.geom.PathIterator; |
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4 | import java.awt.geom.Point2D; |
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5 | |||
6 | import org.gvsig.fmap.geom.Geometry; |
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7 | 30349 | jpiera | import org.gvsig.fmap.mapcontrol.PrimitivesDrawer; |
8 | 23642 | vcaballero | import org.gvsig.fmap.mapcontrol.tools.snapping.snappers.ISnapperVectorial; |
9 | 30349 | jpiera | import org.gvsig.fmap.mapcontrol.tools.snapping.snappers.impl.AbstractSnapper; |
10 | 38226 | jldominguez | import org.gvsig.i18n.Messages; |
11 | 23642 | vcaballero | |
12 | import com.vividsolutions.jts.geom.Coordinate; |
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13 | import com.vividsolutions.jts.geom.LineSegment; |
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14 | |||
15 | public class NearestPointSnapper extends AbstractSnapper implements ISnapperVectorial { |
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16 | public Point2D getSnapPoint(Point2D point, Geometry geom, double tolerance, Point2D lastPointEntered) { |
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17 | Point2D resul = null; |
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18 | Coordinate c = new Coordinate(point.getX(), point.getY());
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19 | |||
20 | 30337 | jpiera | PathIterator theIterator = geom.getPathIterator(null, geomManager.getFlatness()); //polyLine.getPathIterator(null, flatness); |
21 | 23642 | vcaballero | double[] theData = new double[6]; |
22 | double minDist = tolerance;
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23 | Coordinate from = null, first = null; |
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24 | while (!theIterator.isDone()) {
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25 | //while not done
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26 | int theType = theIterator.currentSegment(theData);
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27 | |||
28 | switch (theType) {
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29 | case PathIterator.SEG_MOVETO: |
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30 | from = new Coordinate(theData[0], theData[1]); |
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31 | first = from; |
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32 | break;
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33 | |||
34 | case PathIterator.SEG_LINETO: |
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35 | |||
36 | // System.out.println("SEG_LINETO");
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37 | Coordinate to = new Coordinate(theData[0], theData[1]); |
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38 | LineSegment line = new LineSegment(from, to);
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39 | Coordinate closestPoint = line.closestPoint(c); |
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40 | double dist = c.distance(closestPoint);
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41 | if ((dist < minDist)) {
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42 | resul = new Point2D.Double(closestPoint.x, closestPoint.y); |
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43 | minDist = dist; |
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44 | } |
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45 | |||
46 | from = to; |
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47 | break;
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48 | case PathIterator.SEG_CLOSE: |
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49 | line = new LineSegment(from, first);
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50 | closestPoint = line.closestPoint(c); |
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51 | dist = c.distance(closestPoint); |
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52 | if ((dist < minDist)) {
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53 | resul = new Point2D.Double(closestPoint.x, closestPoint.y); |
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54 | minDist = dist; |
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55 | } |
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56 | |||
57 | from = first; |
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58 | break;
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59 | |||
60 | |||
61 | } //end switch
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62 | |||
63 | theIterator.next(); |
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64 | } |
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65 | |||
66 | return resul;
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67 | } |
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68 | |||
69 | public String getToolTipText() { |
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70 | 38226 | jldominguez | return Messages.getText("Nearest_point"); |
71 | 23642 | vcaballero | } |
72 | |||
73 | 30349 | jpiera | /*
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74 | * (non-Javadoc)
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75 | * @see org.gvsig.fmap.mapcontrol.tools.snapping.snappers.ISnapper#draw(org.gvsig.fmap.mapcontrol.PrimitivesDrawer, java.awt.geom.Point2D)
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76 | 23642 | vcaballero | */
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77 | 30349 | jpiera | public void draw(PrimitivesDrawer primitivesDrawer, Point2D pPixels) { |
78 | primitivesDrawer.setColor(getColor()); |
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79 | 23642 | vcaballero | int half = getSizePixels() / 2; |
80 | int x1 = (int) (pPixels.getX() - half); |
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81 | int x2 = (int) (pPixels.getX() + half); |
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82 | int y1 = (int) (pPixels.getY() - half); |
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83 | int y2 = (int) (pPixels.getY() + half); |
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84 | |||
85 | 30349 | jpiera | primitivesDrawer.drawLine(x1, y1, x2, y1); // abajo
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86 | primitivesDrawer.drawLine(x1, y2, x2, y2); // arriba
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87 | primitivesDrawer.drawLine(x1, y1, x2, y2); // abajo - arriba
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88 | primitivesDrawer.drawLine(x1, y2, x2, y1); // arriba - abajo
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89 | 23642 | vcaballero | } |
90 | } |