X-Git-Url: https://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=tim%2Fprune%2Ffunction%2FSearchOsmPoisFunction.java;fp=tim%2Fprune%2Ffunction%2FSearchOsmPoisFunction.java;h=a35c7b3f87fe16bf171adc6eb28aca568bb940f6;hp=0000000000000000000000000000000000000000;hb=92dad5df664287acb51728e9ea599f150765d34a;hpb=81843c3d8d0771bf00d0f26034a13aa515465c78

diff --git a/tim/prune/function/SearchOsmPoisFunction.java b/tim/prune/function/SearchOsmPoisFunction.java
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+++ b/tim/prune/function/SearchOsmPoisFunction.java
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+package tim.prune.function;
+
+import java.io.InputStream;
+import java.net.URL;
+import java.util.ArrayList;
+
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+import tim.prune.App;
+import tim.prune.I18nManager;
+import tim.prune.data.Coordinate;
+import tim.prune.data.DataPoint;
+import tim.prune.data.Distance;
+import tim.prune.data.Field;
+import tim.prune.data.Latitude;
+import tim.prune.data.Longitude;
+import tim.prune.function.search.GenericDownloaderFunction;
+import tim.prune.function.search.SearchResult;
+
+/**
+ * Function to load nearby point information from OSM
+ */
+public class SearchOsmPoisFunction extends GenericDownloaderFunction
+{
+	/** Maximum distance from point in m */
+	private static final int MAX_DISTANCE = 250;
+	/** Coordinates to search for */
+	private double _searchLatitude = 0.0, _searchLongitude = 0.0;
+
+
+	/**
+	 * Constructor
+	 * @param inApp App object
+	 */
+	public SearchOsmPoisFunction(App inApp) {
+		super(inApp);
+	}
+
+	/**
+	 * @return name key
+	 */
+	public String getNameKey() {
+		return "function.searchosmpois";
+	}
+
+	/**
+	 * @param inColNum index of column, 0 or 1
+	 * @return key for this column
+	 */
+	protected String getColumnKey(int inColNum)
+	{
+		if (inColNum == 0) return "dialog.osmpois.column.name";
+		return "dialog.osmpois.column.type";
+	}
+
+
+	/**
+	 * Run method to get the nearby points in a separate thread
+	 */
+	public void run()
+	{
+		_statusLabel.setText(I18nManager.getText("confirm.running"));
+		// Get coordinates from current point (if any) or from centre of screen
+		DataPoint point = _app.getTrackInfo().getCurrentPoint();
+		if (point == null)
+		{
+			double[] coords  = _app.getViewport().getBounds();
+			_searchLatitude  = (coords[0] + coords[2]) / 2.0;
+			_searchLongitude = (coords[1] + coords[3]) / 2.0;
+		}
+		else
+		{
+			_searchLatitude  = point.getLatitude().getDouble();
+			_searchLongitude = point.getLongitude().getDouble();
+		}
+
+		// Submit search (language not an issue here)
+		submitSearch(_searchLatitude, _searchLongitude);
+
+		// Set status label according to error or "none found", leave blank if ok
+		if (_errorMessage == null && _trackListModel.isEmpty()) {
+			_errorMessage = I18nManager.getText("dialog.osmpois.nonefound");
+		}
+		_statusLabel.setText(_errorMessage == null ? "" : _errorMessage);
+	}
+
+	/**
+	 * Submit the search for the given parameters
+	 * @param inLat latitude
+	 * @param inLon longitude
+	 */
+	private void submitSearch(double inLat, double inLon)
+	{
+		String coords = "around:" + MAX_DISTANCE + "," + inLat + "," + inLon;
+		String urlString = "http://overpass-api.de/api/interpreter?data=("
+			+ "node(" + coords + ")[\"amenity\"][\"name\"];"
+			+ "node(" + coords + ")[\"railway\"][\"name\"];"
+			+ "node(" + coords + ")[\"highway\"][\"name\"];"
+			+ ");out%20qt;";
+		//System.out.println(urlString);
+		// Parse the returned XML with a special handler
+		SearchOsmPoisXmlHandler xmlHandler = new SearchOsmPoisXmlHandler();
+		InputStream inStream = null;
+
+		try
+		{
+			URL url = new URL(urlString);
+			SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
+			inStream = url.openStream();
+			saxParser.parse(inStream, xmlHandler);
+		}
+		catch (Exception e) {
+			_errorMessage = e.getClass().getName() + " - " + e.getMessage();
+		}
+		// Close stream and ignore errors
+		try {
+			inStream.close();
+		} catch (Exception e) {}
+
+		// Calculate distances for each returned point
+		DataPoint searchPoint = new DataPoint(new Latitude(_searchLatitude, Coordinate.FORMAT_DECIMAL_FORCE_POINT),
+			new Longitude(_searchLongitude, Coordinate.FORMAT_DECIMAL_FORCE_POINT), null);
+		for (SearchResult result : xmlHandler.getPointList())
+		{
+			Latitude pointLat = new Latitude(result.getLatitude());
+			Longitude pointLon = new Longitude(result.getLongitude());
+			DataPoint foundPoint = new DataPoint(pointLat, pointLon, null);
+			double dist = DataPoint.calculateRadiansBetween(searchPoint, foundPoint);
+			result.setLength(Distance.convertRadiansToDistance(dist));
+		}
+
+		// TODO: maybe limit number of results using MAX_RESULTS
+		// Add track list to model
+		ArrayList<SearchResult> pointList = xmlHandler.getPointList();
+		_trackListModel.addTracks(pointList, true);
+		_trackListModel.setShowPointTypes(true);
+
+		// Show error message if any
+		if (_trackListModel.isEmpty())
+		{
+			String error = xmlHandler.getErrorMessage();
+			if (error != null && !error.equals(""))
+			{
+				_app.showErrorMessageNoLookup(getNameKey(), error);
+				_errorMessage = error;
+			}
+		}
+	}
+
+	/**
+	 * Load the selected point(s)
+	 */
+	protected void loadSelected()
+	{
+		// Find the rows selected in the table and get the corresponding coords
+		int numSelected = _trackTable.getSelectedRowCount();
+		if (numSelected < 1) return;
+		int[] rowNums = _trackTable.getSelectedRows();
+		for (int i=0; i<numSelected; i++)
+		{
+			int rowNum = rowNums[i];
+			if (rowNum >= 0 && rowNum < _trackListModel.getRowCount())
+			{
+				String lat = _trackListModel.getTrack(rowNum).getLatitude();
+				String lon = _trackListModel.getTrack(rowNum).getLongitude();
+				if (lat != null && lon != null)
+				{
+					DataPoint point = new DataPoint(new Latitude(lat), new Longitude(lon), null);
+					point.setFieldValue(Field.WAYPT_NAME, _trackListModel.getTrack(rowNum).getTrackName(), false);
+					_app.createPoint(point);
+				}
+			}
+		}
+		// Close the dialog
+		_cancelled = true;
+		_dialog.dispose();
+	}
+}