/**
* This example shows how to obtain a color.
*
* @param g
* @param monitor
* @throws RenderException
*/
public void render(Graphics2D g, IProgressMonitor monitor) throws RenderException {
if (monitor == null) monitor = new NullProgressMonitor();
CsvReader reader = null;
try {
ILayer layer = getContext().getLayer();
IGeoResource resource = layer.findGeoResource(CSV.class);
if (resource == null) return;
ReferencedEnvelope bounds = getRenderBounds();
monitor.subTask("connecting");
CSV csv = resource.resolve(CSV.class, null);
// LOOK UP STYLE
IStyleBlackboard style = layer.getStyleBlackboard();
Color color = (Color) style.get(ColorStyle.ID);
// DATA TO WORLD
CoordinateReferenceSystem dataCRS = layer.getCRS();
CoordinateReferenceSystem worldCRS = context.getCRS();
MathTransform dataToWorld = CRS.findMathTransform(dataCRS, worldCRS, false);
// DRAW FILE
monitor.beginTask("csv render", csv.getSize());
reader = csv.reader();
reader.readHeaders();
int nameIndex = reader.getIndex("name");
Coordinate worldLocation = new Coordinate();
while (reader.readRecord()) {
Point point = CSV.getPoint(reader);
Coordinate dataLocation = point.getCoordinate();
try {
JTS.transform(dataLocation, worldLocation, dataToWorld);
} catch (TransformException e) {
continue;
}
if (bounds != null && !bounds.contains(worldLocation)) {
continue; // optimize!
}
java.awt.Point p = getContext().worldToPixel(worldLocation);
g.setColor(color);
g.fillRect(p.x - 2, p.y - 2, 6, 6);
g.setColor(Color.BLACK);
String name = reader.get(nameIndex);
g.drawString(name, p.x + 15, p.y + 15);
monitor.worked(1);
if (monitor.isCanceled()) break;
}
} catch (IOException e) {
throw new RenderException(e); // rethrow any exceptions encountered
} catch (FactoryException e) {
throw new RenderException(e); // rethrow any exceptions encountered
} finally {
if (reader != null) reader.close();
monitor.done();
}
}
@Override
public ReferencedEnvelope getExtent() {
ILayer processingRegionLayer = OmsBoxPlugin.getDefault().getProcessingRegionMapGraphic();
if (processingRegionLayer != null) {
IStyleBlackboard blackboard = processingRegionLayer.getStyleBlackboard();
ProcessingRegionStyle style =
(ProcessingRegionStyle) blackboard.get(ProcessingRegionStyleContent.ID);
if (style == null) {
style = ProcessingRegionStyleContent.createDefault();
}
ProcessingRegion processinRegion =
new ProcessingRegion(
style.west, style.east, style.south, style.north, style.rows, style.cols);
ReferencedEnvelope envelope = new ReferencedEnvelope(processinRegion.getEnvelope(), getCrs());
return envelope;
}
return null;
}