/** Get all the graphics from the shapefile, colored appropriately. */
public OMGraphicList getGraphics() {
if (omgraphics == null) {
omgraphics = new OMGraphicList();
try {
spatialIndex.getOMGraphics(
-180, -90, 180, 90, omgraphics, drawingAttributes, (Projection) null, coordTransform);
updateDrawingParameters(omgraphics);
} catch (IOException ioe) {
Debug.error(ioe.getMessage());
} catch (FormatException fe) {
Debug.error(fe.getMessage());
}
}
return omgraphics;
}
/**
* Get the graphics for a particular lat/lon area.
*
* @param ulLat upper left latitude, in decimal degrees.
* @param ulLon upper left longitude, in decimal degrees.
* @param lrLat lower right latitude, in decimal degrees.
* @param lrLon lower right longitude, in decimal degrees.
* @param proj the current map projection.
* @return OMGraphicList
*/
public OMGraphicList getGraphics(
double ulLat, double ulLon, double lrLat, double lrLon, Projection proj) {
if (cacheURL != null) {
return omgraphics;
}
if (spatialIndex == null) {
return new OMGraphicList();
}
if (politicalAreas == null) {
initialize(originalPrefix, originalProperties);
}
OMGraphicList list = new OMGraphicList();
// check for dateline anomaly on the screen. we check for
// ulLon >= lrLon, but we need to be careful of the check for
// equality because of floating point arguments...
if (ProjMath.isCrossingDateline(ulLon, lrLon, proj.getScale())) {
if (Debug.debugging("areas")) {
Debug.output("AreaHander.getGraphics(): Dateline is on screen");
}
double ymin = Math.min(ulLat, lrLat);
double ymax = Math.max(ulLat, lrLat);
try {
list =
spatialIndex.getOMGraphics(
ulLon, ymin, 180.0d, ymax, list, drawingAttributes, proj, coordTransform);
list =
spatialIndex.getOMGraphics(
-180.0d, ymin, lrLon, ymax, list, drawingAttributes, proj, coordTransform);
} catch (InterruptedIOException iioe) {
// This means that the thread has been interrupted,
// probably due to a projection change. Not a big
// deal, just return, don't do any more work, and let
// the next thread solve all problems.
list = null;
} catch (IOException ex) {
ex.printStackTrace();
} catch (FormatException fe) {
fe.printStackTrace();
}
} else {
double xmin = (double) Math.min(ulLon, lrLon);
double xmax = (double) Math.max(ulLon, lrLon);
double ymin = (double) Math.min(ulLat, lrLat);
double ymax = (double) Math.max(ulLat, lrLat);
try {
list =
spatialIndex.getOMGraphics(
xmin, ymin, xmax, ymax, list, drawingAttributes, proj, coordTransform);
} catch (InterruptedIOException iioe) {
// This means that the thread has been interrupted,
// probably due to a projection change. Not a big
// deal, just return, don't do any more work, and let
// the next thread solve all problems.
list = null;
} catch (java.io.IOException ex) {
ex.printStackTrace();
} catch (FormatException fe) {
fe.printStackTrace();
}
}
updateDrawingParameters(list);
return list;
}
/**
* createArea
*
* @param covtable parameter for createArea
* @param facevec parameter for createArea
* @param ll2 parameter for createArea
* @param dpplon parameter for createArea
* @param featureType the type of feature we are plotting
*/
@SuppressWarnings({"rawtypes"})
public void createArea(
final CoverageTable covtable,
final AreaTable areatable,
final Vector facevec,
final LatLonPoint ll1,
final LatLonPoint ll2,
final float dpplat,
final float dpplon,
final boolean doAntarcticaWorkaround,
final String featureType) {
final Vector ipts = new Vector();
// get the algorithm to collate the edge points for the polygon
int totalSize = 0;
try {
totalSize = areatable.computeEdgePoints(facevec, ipts);
} catch (final com.bbn.openmap.io.FormatException f) {
f.printStackTrace();
return;
}
// find out if any of the edges are in our area
boolean worth_it = false;
// area any of these shapes within our area?
final Enumeration theEdges = ipts.elements();
//
while (theEdges.hasMoreElements()) {
final CoordFloatString cfs = (CoordFloatString) theEdges.nextElement();
if (overlaps(ll1, ll2, cfs)) {
worth_it = true;
continue;
}
}
// do we have any valid data?
if (!worth_it) {
// no, so drop out
return;
}
// get the colour
final java.awt.Color res = getColor(featureType);
// set the colour
_myCanvas.setColor(res);
// convert the group of lines into a single polygon
final java.awt.Polygon poly =
extendArea(ipts, totalSize, ll1, ll2, dpplat, dpplon, false, _myCanvas.getProjection());
// increment the shape counter
counter++;
// end of stepping through the areas
_myCanvas.fillPolygon(poly.xpoints, poly.ypoints, poly.xpoints.length);
}
