Knowledge Base Nr: 00334 trackmap.java - http://www.swe-kaiser.de

Java: GWT: tracking in maps skaliert anzeigen

  
public static void DoDrawTrack(MapWidget map, String sPoints, double fBounds[])
{
    double fLongMax = fBounds[0];
    double fLongMin = fBounds[1];
    double fLatMax = fBounds[2];
    double fLatMin = fBounds[3];

    String pt[] = sPoints.split("#");
    if (pt.length < 2)
        return;

    String val[] = pt[0].split(" ");
    if (val.length < 2)
        return;

    LatLng points[] = new LatLng[pt.length];

    for (int n = 0; n < pt.length; n++)
    {
        String sCoord[] = pt[n].split(" ");

        double fLong = Double.parseDouble(sCoord[0]);
        double fLat = Double.parseDouble(sCoord[1]);

        points[n] = LatLng.newInstance(fLong, fLat);

        if (fLong > fLongMax) fLongMax = fLong;
        if (fLong < fLongMin) fLongMin = fLong;
        if (fLat > fLatMax) fLatMax = fLat;
        if (fLat < fLatMin) fLatMin = fLat;
    }

    Polyline pLine = new Polyline(points, CDefines.TRACKING_COLOR,  CDefines.TRACKING_LINEWIDTH);
    map.addOverlay(pLine);

    fBounds[0] = fLongMax;
    fBounds[1] = fLongMin;
    fBounds[2] = fLatMax;
    fBounds[3] = fLatMin;
}

public static void DoResizeAndCenterMap(MapWidget map, double fLongMin, double fLongMax, double fLatMin, double fLatMax)
{
    if (map == null)
        return;

    double fOffset = CDefines.VEHICLE_POSITIONS_MAP_OFFSET;

    LatLng sw = LatLng.newInstance(fLongMin-fOffset, fLatMin-fOffset);
    LatLng ne = LatLng.newInstance(fLongMax+fOffset, fLatMax+fOffset);
    LatLngBounds bounds = LatLngBounds.newInstance(sw, ne);
    int nZoomLevel = map.getBoundsZoomLevel(bounds);
    LatLng llCenter = bounds.getCenter();

    map.setCenter(llCenter, nZoomLevel);
}

public static void ShowTrack(String sPoints);
{
    double fBounds[] = new double[4];
    fBounds[0] = fLongMax;
    fBounds[1] = fLongMin;
    fBounds[2] = fLatMax;
    fBounds[3] = fLatMin;

    DoDrawTrack(m_map, sPoints, fBounds);

    fLongMax = fBounds[0];
    fLongMin = fBounds[1];
    fLatMax = fBounds[2];
    fLatMin = fBounds[3];

    String sPosition = m_arrJobData[i].m_strGPSData;
    ShowPosition("TRACK", sPosition, "");

    DoResizeAndCenterMap(m_map, fLongMin, fLongMax, fLatMin, fLatMax);
}

private void ShowPosition(String sEvent, String sPosition, String sText)
{
    String sCoord[] = sPosition.split(" ");
    if (sCoord.length != 2)
        return;

    double fLong = Double.parseDouble(sCoord[0]);
    double fLat = Double.parseDouble(sCoord[1]);

    HTML html = new HTML("<b>" + sEvent + "</b><br /><p>" + sText + "</p><p>" + sPosition.replace(" ", ", ") + "</p>");

    if ((m_map != null) && m_dockMap.isVisible())
    {
        m_point = LatLng.newInstance(fLong, fLat);
        m_map.addOverlay(new Marker(m_point));
        m_map.setCenter(m_point);

        m_map.getInfoWindow().open(m_map.getCenter(), new InfoWindowContent(html));
    }

    m_imgPanel.setVisible(false);
    m_dockMap.setVisible(true);
}


MapWidget m_map = null;
DockLayoutPanel m_dockMap = null;
LatLng m_point = null;

private void createMapPanel()
{
    //firmenstandort
    //m_point = LatLng.newInstance(m_mf.m_p.m_fGPSHomeLat, m_mf.m_p.m_fGPSHomeLong);
    m_point = LatLng.newInstance(m_mf.m_p.m_CustomerData.GetLat(), m_mf.m_p.m_CustomerData.GetLon());

    m_map = new MapWidget(m_point, CDefines.JOB_DATA_MAP_START_ZOOM);
    m_map.setSize("100%", "100%");

    // Add some controls for the zoom level
    m_map.addControl(new LargeMapControl());

    // Add a marker
    m_map.addOverlay(new Marker(m_point));

    // Add an info window to highlight a point of interest
    HTML html = new HTML(CDefines.JOB_DATA_MAP_HOME_TEXT);

    m_map.getInfoWindow().open(m_map.getCenter(),
        new InfoWindowContent(html));

    m_dockMap = new DockLayoutPanel(Unit.PX);
    m_dockMap.addNorth(m_map, CDefines.JOB_DATA_MAP_HEIGHT);
    m_dockMap.setStyleName("jobdata-mapview");

    m_centerpanel.add(m_dockMap);
}

public void Init()
{
    Maps.loadMapsApi("", "2", false, new Runnable() {
          public void run() {
            createMapPanel();
          }
        });
}