GetLiveFeatureAttrs() in MapViewer returns data for wrong coordinates
Hi forum
I am trying to build a small Java application to fetch and display data from MapViewer. I have a set of predefined themes and want to add a query theme, from which I can fetch further information through live features. From reading the docs, to my best understanding, the procedure to do so is this:
1. Define a query theme with attributes and make it "clickable", and use the "raw" image format. GEOLOC is the sdo_geometry column, the rest are for the live features.
String sqlQuery = "SELECT gravstedsnavn, nummer, areal, geoloc FROM gravsteder3 s where s.dblink in (" + retline + ")";
mv.addJDBCTheme("bssys", "QUERY_DATA", sqlQuery, "geoloc", "8307", null, null, null, true);
String[] boundingThemes = { "QUERY_DATA" };
mv.setClickable(true, "QUERY_DATA");
mv.setImageFormat(MapViewer.FORMAT_RAW_COMPRESSED);
mv.setBoundingThemes(boundingThemes, 0.05, true);2. I use a JPanel to render the map image, for which I want a tooltip to show the live feature given the mouse coordinate, when the mouse moves around the JPanel (mapDisplay being the JPanel):
private void mapDisplay_mouseMoved(MouseEvent e) {
Insets is = ((JPanel)e.getComponent()).getInsets();
int x = e.getX() - is.left, y = e.getY() - is.top;
mapImage = mi.getMapUrl("5", x, y, mapURL);
}getMapUrl does the following to display the live features in a tooltiptext on the JPanel:
String[][] test = null;
try {
test = mv.getLiveFeatureAttrs(x,y,0);
} catch (NullPointerException ex) {
System.out.println("No information available");
if ((test.length == 0) || (test == null)) {
jp.setToolTipText(null);
} else {
String gravstedsnavn = "";
String gravstedsnr = "";
String areal = "";
if (test != null) {
for (int i = 0; i < test.length; i++) {
for (int j = 0; j < test.length; j++) {
if (j == 0) {
gravstedsnavn = test[i][j];
if (j == 1) {
gravstedsnr = test[i][j];
if (j == 2) {
areal = test[i][j];
jp.setToolTipText("<html>Gravstedsnavn: " + gravstedsnavn + "<br>Nummer: " + gravstedsnr + "<br>Areal: " + areal +"</html>");
This code works - the only problem is, that the attributes returned from the getLiveFeatureAttrs() function returns values from a completely different coordinate from the map than expected. I believe, that its my mouseMoved event, which causes the problem - but I havent figured out the way to pass the right mouse coordinates to getLiveFeatureAttrs().
Does someone have a working live features example, and can anyone eventually see, what the problem with my code is?
Thanks in advance.
Hello Joao
I have setup a public MapViewer server and modified your code slightly, so it can run against my server. The code should return a single rectangular polygon, and if you try moving your mouse around in the JFrame, the live features are available where they shouldn't be, ie outside the marked rectangle, so something is still not working right... Could you do me the favor to try to compile and run this code? My testsite testbooking.brandsoft.dk should be publicly viewable. Could it have something to do with the value of the SRID?
package oracle.forms.fbean;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Insets;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import oracle.lbs.mapclient.MapViewer;
public class livefeature extends JFrame
static Image img = null; //global image buffer
static Insets is = null; //insets inside a frame.
final static int mapWidth = 640;
final static int mapHeight = 480;
MapViewer mv = null;
private class myMouseListener implements MouseMotionListener
public void mouseDragged(MouseEvent e) {
public void mouseMoved(MouseEvent e) {
int x = e.getX() - is.left;
int y = e.getY() - is.top;
String[][] test = mv.getLiveFeatureAttrs(x,y,0);
if ((test.length == 0) || (test == null)) {
System.out.println("No livefeatures found");
} else {
String gravstedsnavn = "";
String gravstedsnr = "";
String areal = "";
if (test != null) {
for (int i = 0; i < test.length; i++) {
for (int j = 0; j < test.length; j++) {
if (j == 0) {
gravstedsnavn = test[i][j];
if (j == 1) {
gravstedsnr = test[i][j];
if (j == 2) {
areal = test[i][j];
System.out.println("<html>Gravstedsnavn: " + gravstedsnavn + "<br>Nummer: " + gravstedsnr + "<br>Areal: " + areal +"</html>");
public livefeature()
setTitle("MapViewer: Live Feature");
setVisible(true);
is = getInsets();
System.out.println("Insets: " + is);
setSize(mapWidth+is.left+is.right, mapHeight+is.top+is.bottom);
this.addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(WindowEvent e) { System.exit(0); }
this.addMouseMotionListener(new myMouseListener());
public void paint(Graphics g)
if(img==null)
drawGeometries(g);
//draws the image to the screen
if(img!=null)
g.drawImage(img, is.left, is.top,
img.getWidth(null), img.getHeight(null), null);
public void drawGeometries(Graphics g)
mv = new MapViewer("http://testbooking.brandsoft.dk/mapviewer/omserver");
mv.setDeviceSize(new Dimension(mapWidth,mapHeight));
mv.setAntiAliasing(true);
mv.setDataSourceName("bssys");
String sqlQuery = "SELECT s.gravgaardsnavn, s.gravnr, s.areal, s.geoloc FROM gravsteder3 s where s.dblink in (30200020)";
mv.addJDBCTheme("bssys", "QUERY_DATA", sqlQuery, "geoloc", "0", "BSSYS:ROED_MARKERING", null, "BSSYS:SORT_TEKST", true);
String[] boundingThemes = { "QUERY_DATA" };
mv.addJDBCTheme("bssys", "QUERY_DATA_1", sqlQuery, "geoloc", "0", "BSSYS:ROED_MARKERING", null, "BSSYS:SORT_TEKST", true);
mv.setClickable(true, "QUERY_DATA_1");
mv.setImageFormat(MapViewer.FORMAT_RAW_COMPRESSED);
mv.setBoundingThemes(boundingThemes, 0.05, true);
try
mv.run();
img = mv.getGeneratedMapImage();
repaint();
} catch(Exception e)
System.out.println("Error while rendering theme.");
e.printStackTrace();
public static void main(String[] args)
new livefeature();
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