| 1 | package wmsplugin;
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| 2 |
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| 3 | import uk.me.jstott.jcoord.OSRef;
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| 4 | import uk.me.jstott.jcoord.LatLng;
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| 5 |
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| 6 | import java.io.IOException;
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| 7 | import java.net.MalformedURLException;
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| 8 | import java.net.URL;
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| 9 |
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| 10 | import org.openstreetmap.josm.Main;
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| 11 | import org.openstreetmap.josm.data.coor.LatLon;
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| 12 | import org.openstreetmap.josm.data.coor.EastNorth;
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| 13 | import org.openstreetmap.josm.gui.NavigatableComponent;
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| 14 |
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| 15 | import java.awt.Graphics2D;
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| 16 | import java.awt.BasicStroke;
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| 17 | import java.awt.Point;
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| 18 | import java.awt.Graphics;
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| 19 | import java.awt.Color;
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| 20 |
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| 21 | public class OSGBImage extends WMSImage
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| 22 | {
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| 23 | public OSGBImage(String constURL)
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| 24 | {
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| 25 | super(constURL);
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| 26 | }
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| 27 |
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| 28 | public void grab(NavigatableComponent nc,double minlat,double minlon,
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| 29 | double maxlat,double maxlon) throws IOException
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| 30 | {
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| 31 | // To deal with the fact that grid refs and lat/lon don't align
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| 32 | LatLng ll1 = new LatLng(minlat,minlon),
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| 33 | ll2 = new LatLng(maxlat,maxlon),
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| 34 | ll3 = new LatLng(maxlat,minlon),
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| 35 | ll4 = new LatLng(minlat,maxlon);
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| 36 |
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| 37 | ll1.toOSGB36();
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| 38 | ll2.toOSGB36();
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| 39 | ll3.toOSGB36();
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| 40 | ll4.toOSGB36();
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| 41 |
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| 42 | OSRef bottomLeftGR = ll1.toOSRef(),
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| 43 | topRightGR = ll2.toOSRef(),
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| 44 | topLeftGR = ll3.toOSRef(),
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| 45 | bottomRightGR = ll4.toOSRef();
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| 46 |
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| 47 | double w = Math.min(bottomLeftGR.getEasting(),
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| 48 | topLeftGR.getEasting()),
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| 49 | s = Math.min(bottomLeftGR.getNorthing(),
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| 50 | bottomRightGR.getNorthing()),
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| 51 | e = Math.max(bottomRightGR.getEasting(),
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| 52 | topRightGR.getEasting()),
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| 53 | n = Math.max(topLeftGR.getNorthing(),
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| 54 | topRightGR.getNorthing());
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| 55 |
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| 56 | // Adjust topLeft and bottomRight due to messing around with
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| 57 | // projections
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| 58 | LatLng tl2 = new OSRef(w,n).toLatLng();
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| 59 | LatLng br2 = new OSRef(e,s).toLatLng();
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| 60 | tl2.toWGS84();
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| 61 | br2.toWGS84();
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| 62 |
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| 63 | topLeft = Main.proj.latlon2eastNorth
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| 64 | (new LatLon(tl2.getLat(),tl2.getLng() ));
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| 65 | bottomRight = Main.proj.latlon2eastNorth
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| 66 | (new LatLon(br2.getLat(),br2.getLng() ));
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| 67 |
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| 68 | grabbedScale = nc.getScale(); // enPerPixel
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| 69 |
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| 70 | int widthPx = (int)((bottomRight.east()-topLeft.east())/grabbedScale),
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| 71 | heightPx = (int)
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| 72 | ((topLeft.north()-bottomRight.north()) / grabbedScale);
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| 73 |
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| 74 | try
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| 75 | {
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| 76 | URL url = doGetURL(w,s,e,n,widthPx,heightPx);
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| 77 | doGrab(url);
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| 78 | }
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| 79 | catch(MalformedURLException ex)
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| 80 | {
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| 81 | System.out.println("Illegal url. Error="+ex);
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| 82 | }
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| 83 | }
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| 84 |
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| 85 | public void paint(Graphics g,NavigatableComponent nc)
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| 86 | {
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| 87 | if(theImage!=null)
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| 88 | {
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| 89 | super.paint(g,nc);
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| 90 | Graphics2D g2d = (Graphics2D)g;
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| 91 | g2d.setStroke(new BasicStroke(2));
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| 92 |
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| 93 | // Display markers at the OSGB intersections.
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| 94 | // The code is very convoluted - projections really are fun
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| 95 | // things to deal with :-)
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| 96 | // Oh well, at least I can let someone else do the maths :-)
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| 97 |
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| 98 | double zoomInFactor = grabbedScale / nc.getScale();
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| 99 |
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| 100 | EastNorth topLeftDisplaced =
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| 101 | new EastNorth(topLeft.east()+dEast, topLeft.north()+dNorth);
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| 102 | EastNorth bottomRightDisplaced =
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| 103 | new EastNorth(bottomRight.east()+dEast,
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| 104 | bottomRight.north()+dNorth);
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| 105 |
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| 106 | LatLon ll5 = Main.proj.eastNorth2latlon(topLeftDisplaced),
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| 107 | ll6 = Main.proj.eastNorth2latlon(bottomRightDisplaced);
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| 108 |
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| 109 | LatLng ll7 = new LatLng(ll5.lat(),ll5.lon());
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| 110 | LatLng ll8 = new LatLng(ll6.lat(),ll6.lon());
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| 111 | ll7.toOSGB36();
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| 112 | ll8.toOSGB36();
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| 113 |
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| 114 | LatLng curLatLng;
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| 115 | EastNorth curEN;
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| 116 |
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| 117 |
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| 118 | OSRef osgb1 = ll7.toOSRef(),
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| 119 | osgb2 = ll8.toOSRef();
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| 120 |
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| 121 | for(int easting=(int)(osgb1.getEasting()/1000) + 1;
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| 122 | easting<=(int)(osgb2.getEasting()/1000);
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| 123 | easting++)
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| 124 | {
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| 125 | for (int northing=(int)(osgb1.getNorthing()/1000) ;
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| 126 | northing>(int)(osgb2.getNorthing()/1000);
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| 127 | northing--)
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| 128 | {
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| 129 | // Now we have to convert the OSGB eastings and northings
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| 130 | // *back* to EastNorth units so we can draw the
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| 131 | // intersections....
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| 132 | // Not to mention converting between JOSM LatLon and
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| 133 | // JCoord LatLng....
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| 134 |
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| 135 |
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| 136 | curLatLng = new OSRef(easting*1000,northing*1000).
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| 137 | toLatLng();
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| 138 | curLatLng.toWGS84();
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| 139 | curEN = Main.proj.latlon2eastNorth
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| 140 | (new LatLon(curLatLng.getLat(),
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| 141 | curLatLng.getLng() ) );
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| 142 |
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| 143 | // draw a cross at the intersection
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| 144 | Point p = Main.map.mapView.getPoint(curEN);
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| 145 | g.setColor(Color.BLUE);
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| 146 | g.drawLine(p.x-5,p.y,p.x+5,p.y);
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| 147 | g.drawLine(p.x,p.y-5,p.x,p.y+5);
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| 148 | }
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| 149 | }
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| 150 | g2d.setStroke(new BasicStroke(1));
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| 151 | }
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| 152 | }
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| 153 | }
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