I put together a rubberband example via the FeatureCollection and mouse
(Press,Dragged,Released) this afternoon.
Is using Java2d a better way to do this? If so is there an example out there
with drawing and Java2d?
I load data into a TreeMap of XyzPoint
Based on mouse actions I build a FeatureCollection and display to the user as
points are added with a rubberband effect.
onMousePressed: starts a new TreeMap of XyzPoints
onMouseDragged: does rubberband effect of line from last point
onMouseReleased: completes from last point released to the 0 element starting
point
What I was thinking was build with a featureCollection convert to poly when
complete and name. Then from there be able to manipulate it more as part of
the Collection. The following is my code:
package org.geotools.demo;
import org.geotools.feature.FeatureCollection;
public class RubberbandAction {
static StyleFactory styleFactory =
CommonFactoryFinder.getStyleFactory(null);
static FilterFactory filterFactory =
CommonFactoryFinder.getFilterFactory(null);
static final CoordinateReferenceSystem crs = DefaultGeographicCRS.WGS84;
static final int MAX_NAME_LENGTH = 20;
static JMapFrame mapFrame = new JMapFrame();
static TreeMap <Integer, XyzPoint>eallPoints = new TreeMap<Integer,
XyzPoint>();
static MapContext mapper;
static int startPoint=0;
public static void main(String[] args) throws Exception {
TreeMapHandler tmHandler = new TreeMapHandler();
TreeMap allPoints = tmHandler.getTreeMap("/projects/Yard3.svy");
FeatureCollection collection = getLineFeature(allPoints);
FeatureSource featureSource = DataUtilities.source(collection);
Style lineStyle = createLineStyle();
MapContext map = new DefaultMapContext();
map.setTitle("The Line");
map.addLayer(featureSource, lineStyle);
//JMapFrame.showMap(map);
displayMap(map);
}
public static void displayMap(MapContext map) throws Exception {
mapFrame = new JMapFrame(map);
/*
* Before making the map frame visible we add a new button to its
* toolbar for our custom feature selection tool
*/
mapper=map;
mapFrame.enableToolBar(true);
JToolBar toolBar = mapFrame.getToolBar();
JButton btn = new JButton("Select");
toolBar.addSeparator();
toolBar.add(btn);
btn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
mapFrame.getMapPane().setCursorTool(
new CursorTool() {
@Override
public void onMousePressed(MapMouseEvent ev) {
Point p = ev.getLocationOnScreen();
//p would be actual x,y pixel point
DirectPosition2D pos = ev.getMapPosition();
if(eallPoints!=null && eallPoints.size()>0){
System.out.println("startPoint="+startPoint);
try {
XyzPoint xyz = new XyzPoint();
xyz.setX(pos.getX());
xyz.setY(pos.getY());
System.out.println("onMousePressed
X="+pos.getX()+" Y="+pos.getY());
eallPoints.put(startPoint, xyz);
} catch(Exception e){
System.out.println("e" +e);
}
} else if(eallPoints!=null && eallPoints.size()!=1){
System.out.println("FIRE eallPoints if");
eallPoints = new TreeMap<Integer, XyzPoint>();
try {
XyzPoint xyz = new XyzPoint();
xyz.setX(pos.getX());
xyz.setY(pos.getY());
System.out.println("onMousePressed
X="+pos.getX()+" Y="+pos.getY());
eallPoints.put(startPoint, xyz);
} catch(Exception e){
System.out.println("e" +e);
}
}
}
@Override
public void onMouseDragged(MapMouseEvent ev) {
DirectPosition2D pos = ev.getMapPosition();
System.out.println("onMouseDragged X="+pos.getX()+"
Y="+pos.getY());
try {
if(getLayerIndex("draw")>=0){
mapper.removeLayer(getLayerIndex("draw"));
}
XyzPoint xyz = new XyzPoint();
xyz.setX(pos.getX());
xyz.setY(pos.getY());
eallPoints.put(startPoint+1, xyz);
FeatureCollection collection =
getLineFeature(eallPoints);
FeatureSource featureSource =
DataUtilities.source(collection);
mapper.addLayer(featureSource,
createLineStyle());
mapper.getLayer(getLastIndex()).setTitle("draw");
mapFrame = new JMapFrame(mapper);
mapFrame.repaint();
} catch (Exception e) {
System.out.println("e: "+e);
}
}
@Override
public void onMouseReleased(MapMouseEvent ev) {
System.out.println("onMouseReleased");
try {
startPoint=startPoint+2;
eallPoints.put(startPoint,(XyzPoint)eallPoints.get(0));
FeatureCollection collection =
getLineFeature(eallPoints);
FeatureSource featureSource =
DataUtilities.source(collection);
mapper.addLayer(featureSource,
createLineStyle());
mapper.getLayer(getLastIndex()).setTitle("draw");
mapFrame = new JMapFrame(mapper);
mapFrame.repaint();
} catch (Exception e) {
System.out.println("e: "+e);
}
}
});
}
});
mapFrame.setSize(600, 600);
mapFrame.setVisible(true);
}
public static int getLastIndex() throws IOException{
MapLayer[] layers = mapper.getLayers();
System.out.println("layers.lenght-1="+(layers.length-1));
return layers.length-1;
}
public static int getLayerIndex(String name) throws IOException{
MapLayer[] layers = mapper.getLayers();
for (int i=0; i<layers.length; i++){
System.out.println(i);
if(name.compareTo(layers[i].getTitle())==0){
System.out.println("remove draw layer");
return i;
}
}
return -1;
}
public static FeatureCollection getLineFeature(TreeMap allPoints) throws
Exception {
SimpleFeatureTypeBuilder typeBuilder = new SimpleFeatureTypeBuilder();
typeBuilder.setName("mytype");
typeBuilder.setCRS(crs);
typeBuilder.add("route", LineString.class);
//typeBuilder.length(MAX_NAME_LENGTH).add("name", String.class);
final SimpleFeatureType TYPE = typeBuilder.buildFeatureType();
FeatureCollection collection = FeatureCollections.newCollection();
GeometryFactory factory = JTSFactoryFinder.getGeometryFactory(null);
SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(TYPE);
ArrayList coordList = new ArrayList();
Collection cl = allPoints.values();
Iterator it = cl.iterator();
while (it.hasNext()){
XyzPoint xyz = (XyzPoint)it.next();
coordList.add(new Coordinate(xyz.getX(),xyz.getY()));
//featureBuilder.set("name",xyz.getName());
}
Coordinate[] coords = CoordinateArrays.toCoordinateArray(coordList);
LineString lineString = factory.createLineString(coords);
//LineString lineString = factory.createLineString(cord);
//SimpleFeature feature = SimpleFeatureBuilder.build( TYPE, new
Object[]{lineString, "test"}, null );
//featureBuilder.set("name", "testing123");
featureBuilder.add(lineString);
collection.add(featureBuilder.buildFeature(null));
coordList.clear();
return collection;
}
private static Style createLineStyle() {
Stroke stroke = styleFactory.createStroke(
filterFactory.literal(Color.BLUE),
filterFactory.literal(1));
LineSymbolizer sym = styleFactory.createLineSymbolizer(stroke, null);
Rule rule = styleFactory.createRule();
rule.symbolizers().add(sym);
FeatureTypeStyle fts = styleFactory.createFeatureTypeStyle(new
Rule[]{rule});
Style style = styleFactory.createStyle();
style.featureTypeStyles().add(fts);
return style;
}
}
------------------------------------------------------------------------------
Return on Information:
Google Enterprise Search pays you back
Get the facts.
http://p.sf.net/sfu/google-dev2dev
_______________________________________________
Geotools-gt2-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
