com.nextgis.maplib.datasource.GeoLineString Java Examples

protected void fillDrawLine(GeoLineString lineString) {
    GeoPoint[] geoPoints =
            lineString.getPoints().toArray(new GeoPoint[lineString.getPointCount()]);
    float[] points = mapToScreen(geoPoints);

    mSelectedItem = new DrawItem(DrawItem.TYPE_VERTEX, points);
    mDrawItems.add(mSelectedItem);

    if (points.length < 2)
        return;

    float[] edgePoints = new float[points.length - 2];
    for (int i = 0; i < points.length - 2; i++)
        edgePoints[i] = (points[i] + points[i + 2]) * .5f;

    mSelectedItem.addEdges(edgePoints);
}
 

public void onDraw(GeoLineString lineString, GISDisplay display) {
    if (null == lineString) {
        return;
    }

    float scaledWidth = (float) (mWidth / display.getScale());
    Path mainPath = null;
    switch (mType) {
        case LineStyleSolid:
            mainPath = drawSolidLine(scaledWidth, lineString, display);
            break;

        case LineStyleDash:
            mainPath = drawDashLine(scaledWidth, lineString, display);
            break;

        case LineStyleEdgingSolid:
            mainPath = drawSolidEdgingLine(scaledWidth, lineString, display);
            break;
    }

    drawText(scaledWidth, mainPath, display);
}
 

@Override
public void onDraw(GeoGeometry geoGeometry, GISDisplay display) {
    mColor = Color.argb(mInnerAlpha, Color.red(mColor), Color.green(mColor), Color.blue(mColor));
    mOutColor = Color.argb(mOuterAlpha, Color.red(mOutColor), Color.green(mOutColor), Color.blue(mOutColor));

    switch (geoGeometry.getType()) {
        case GTLineString:
            onDraw((GeoLineString) geoGeometry, display);
            break;

        case GTMultiLineString:
            GeoMultiLineString multiLineString = (GeoMultiLineString) geoGeometry;
            for (int i = 0; i < multiLineString.size(); i++) {
                onDraw(multiLineString.get(i), display);
            }
            break;

        //throw new IllegalArgumentException(
        //        "The input geometry type is not support by this style");
    }

}
 

protected Path drawSolidLine(float scaledWidth, GeoLineString lineString, GISDisplay display) {
    Paint paint = new Paint();
    paint.setColor(mColor);
    paint.setAntiAlias(true);
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeCap(mStrokeCap);
    paint.setStrokeWidth(scaledWidth);

    List<GeoPoint> points = lineString.getPoints();

    Path path = new Path();
    path.incReserve(points.size());

    path.moveTo((float) points.get(0).getX(), (float) points.get(0).getY());

    for (int i = 1; i < points.size(); ++i) {
        path.lineTo((float) points.get(i).getX(), (float) points.get(i).getY());
    }

    display.drawPath(path, paint);

    return path;
}
 

protected Path getPath(GeoLineString lineString) {
    List<GeoPoint> points = lineString.getPoints();
    Path path = new Path();
    float x0, y0;

    if (points.size() > 0) {
        x0 = (float) points.get(0).getX();
        y0 = (float) points.get(0).getY();
        path.moveTo(x0, y0);

        for (int i = 1; i < points.size(); i++) {
            x0 = (float) points.get(i).getX();
            y0 = (float) points.get(i).getY();

            path.lineTo(x0, y0);
        }
    }

    return path;
}
 

private void loadTrack(int trackId)
{
    Cursor track = getTrack(trackId);

    if (track == null || !track.moveToFirst()) {
        return;
    }

    float x0 = track.getFloat(track.getColumnIndex(TrackLayer.FIELD_LON)),
            y0 = track.getFloat(track.getColumnIndex(TrackLayer.FIELD_LAT));

    GeoLineString trackLine = new GeoLineString();
    trackLine.setCRS(GeoConstants.CRS_WEB_MERCATOR);
    trackLine.add(new GeoPoint(x0, y0));

    while (track.moveToNext()) {
        x0 = track.getFloat(track.getColumnIndex(TrackLayer.FIELD_LON));
        y0 = track.getFloat(track.getColumnIndex(TrackLayer.FIELD_LAT));
        trackLine.add(new GeoPoint(x0, y0));
    }

    mTracks.put(trackId, trackLine);
}
 

@Override
public void onRestoreState(Bundle bundle) {
    if (bundle.containsKey(BUNDLE_GEOMETRY))
        try {
            mRulerString = (GeoLineString) GeoGeometryFactory.fromBlob(bundle.getByteArray(BUNDLE_GEOMETRY));
        } catch (IOException e) {
            e.printStackTrace();
        }

    super.onRestoreState(bundle);
}
 

protected Path drawSolidEdgingLine(float scaledWidth, GeoLineString lineString, GISDisplay display) {
    Paint mainPaint = new Paint();
    mainPaint.setColor(mColor);
    mainPaint.setAntiAlias(true);
    mainPaint.setStyle(Paint.Style.STROKE);
    mainPaint.setStrokeCap(Paint.Cap.BUTT);
    mainPaint.setStrokeWidth(scaledWidth);

    Paint edgingPaint = new Paint(mainPaint);
    edgingPaint.setColor(mOutColor);
    edgingPaint.setStrokeCap(Paint.Cap.BUTT);
    edgingPaint.setStrokeWidth(scaledWidth * 3);

    List<GeoPoint> points = lineString.getPoints();

    Path path = new Path();
    path.incReserve(points.size());

    path.moveTo((float) points.get(0).getX(), (float) points.get(0).getY());

    for (int i = 1; i < points.size(); ++i) {
        path.lineTo((float) points.get(i).getX(), (float) points.get(i).getY());
    }

    display.drawPath(path, edgingPaint);
    display.drawPath(path, mainPaint);

    return path;
}
 

@Override
public void onDraw(GeoGeometry geoGeometry, GISDisplay display) {
    switch (geoGeometry.getType()) {
        case GTPolygon:
            drawPolygon((GeoPolygon) geoGeometry, display);
            break;
        case GTMultiPolygon:
            GeoMultiPolygon multiPolygon = (GeoMultiPolygon) geoGeometry;

            for (int i = 0; i < multiPolygon.size(); i++) {
                drawPolygon(multiPolygon.get(i), display);
            }
            break;
        case GTPoint:
            drawPoint((GeoPoint) geoGeometry, display);
            break;
        case GTMultiPoint:
            GeoMultiPoint multiPoint = (GeoMultiPoint) geoGeometry;
            for (int i = 0; i < multiPoint.size(); i++) {
                drawPoint(multiPoint.get(i), display);
            }
            break;
        case GTLineString:
            drawLineString((GeoLineString) geoGeometry, display);
            break;
        case GTMultiLineString:
            GeoMultiLineString multiLineString = (GeoMultiLineString) geoGeometry;
            for (int i = 0; i < multiLineString.size(); i++) {
                drawLineString(multiLineString.get(i), display);
            }
            break;
    }
}
 

protected void drawLineString(GeoLineString line, GISDisplay display) {
    final Paint lnPaint = new Paint();
    lnPaint.setColor(mColor);
    lnPaint.setAlpha(mOuterAlpha);
    lnPaint.setStrokeWidth((float) (mWidth / display.getScale()));
    lnPaint.setStrokeCap(Paint.Cap.ROUND);
    lnPaint.setAntiAlias(true);

    final Path linePath = getPath(line);

    lnPaint.setStyle(Paint.Style.STROKE);
    display.drawPath(linePath, lnPaint);
}
 

public Map<Integer, GeoLineString> getTracks()
{
    if (mTracks.size() == 0) {
        reloadTracks(INSERT);
    }

    return mTracks;
}
 

protected String getRulerText() {
    GeoPoint p1 = new GeoPoint(mScaleRuler.getLeft(), mScaleRuler.getBottom());
    GeoPoint p2 = new GeoPoint(mScaleRuler.getRight(), mScaleRuler.getBottom());
    p1 = mMap.getMap().screenToMap(p1);
    p2 = mMap.getMap().screenToMap(p2);
    p1.setCRS(GeoConstants.CRS_WEB_MERCATOR);
    p2.setCRS(GeoConstants.CRS_WEB_MERCATOR);
    GeoLineString s = new GeoLineString();
    s.add(p1);
    s.add(p2);

    return LocationUtil.formatLength(getContext(), s.getLength(), 1);
}
 

public void fillDrawItems(GeoGeometry geom) {
    int lastItemsCount = mDrawItems.size();
    int lastSelectedItemPosition = mDrawItems.indexOf(mSelectedItem);
    DrawItem lastSelectedItem = mSelectedItem;
    mDrawItems.clear();

    if (null == geom) {
        Log.w(Constants.TAG, "the geometry is null in fillDrawItems method");
        return;
    }

    GeoPoint[] geoPoints = new GeoPoint[1];
    Location last = mGpsEventSource.getLastKnownLocation();
    switch (geom.getType()) {
        case GeoConstants.GTPoint:
            geoPoints[0] = (GeoPoint) geom;
            mSelectedItem = new DrawItem(DrawItem.TYPE_VERTEX, mapToScreen(geoPoints));
            mDrawItems.add(mSelectedItem);
            break;
        case GeoConstants.GTMultiPoint:
            GeoMultiPoint geoMultiPoint = (GeoMultiPoint) geom;
            for (int i = 0; i < geoMultiPoint.size(); i++) {
                geoPoints[0] = geoMultiPoint.get(i);
                mSelectedItem = new DrawItem(DrawItem.TYPE_VERTEX, mapToScreen(geoPoints));
                mDrawItems.add(mSelectedItem);
            }
            break;
        case GeoConstants.GTLineString:
            fillDrawLine((GeoLineString) geom);
            break;
        case GeoConstants.GTMultiLineString:
            GeoMultiLineString multiLineString = (GeoMultiLineString) geom;
            for (int i = 0; i < multiLineString.size(); i++)
                fillDrawLine(multiLineString.get(i));
            break;
        case GeoConstants.GTPolygon:
            fillDrawPolygon((GeoPolygon) geom);
            break;
        case GeoConstants.GTMultiPolygon:
            GeoMultiPolygon multiPolygon = (GeoMultiPolygon) geom;
            for (int i = 0; i < multiPolygon.size(); i++)
                fillDrawPolygon(multiPolygon.get(i));
            break;
        case GeoConstants.GTGeometryCollection:
            GeoGeometryCollection collection = (GeoGeometryCollection) geom;
            for (int i = 0; i < collection.size(); i++) {
                GeoGeometry geoGeometry = collection.get(i);
                fillDrawItems(geoGeometry);
            }
            break;
        default:
            break;
    }

    if (mDrawItems.size() == lastItemsCount && lastSelectedItem != null &&
            lastSelectedItemPosition != Constants.NOT_FOUND) {
        mSelectedItem = mDrawItems.get(lastSelectedItemPosition);
        mSelectedItem.setSelectedRing(lastSelectedItem.getSelectedRingId());
        mSelectedItem.setSelectedPoint(lastSelectedItem.getSelectedPointId());
    } else {
        mSelectedItem = mDrawItems.get(0);
    }

    switch (geom.getType()) {
        case GeoConstants.GTPoint:
        case GeoConstants.GTMultiPoint:
            updateDistance(last, null);
            break;
    }
}
 

protected Path drawDashLine(float scaledWidth, GeoLineString lineString, GISDisplay display) {
    Paint paint = new Paint();
    paint.setColor(mColor);
    paint.setAntiAlias(true);
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeCap(Paint.Cap.BUTT);
    paint.setStrokeWidth(scaledWidth);

    List<GeoPoint> points = lineString.getPoints();

    // workaround for "DashPathEffect/drawLine not working properly when hardwareAccelerated="true""
    // https://code.google.com/p/android/issues/detail?id=29944

    // get all points to the main path
    Path mainPath = new Path();
    mainPath.incReserve(points.size());

    mainPath.moveTo((float) points.get(0).getX(), (float) points.get(0).getY());

    for (int i = 1; i < points.size(); ++i) {
        mainPath.lineTo((float) points.get(i).getX(), (float) points.get(i).getY());
    }

    // draw along the main path
    PathMeasure pm = new PathMeasure(mainPath, false);
    float[] coordinates = new float[2];
    float length = pm.getLength();
    float dash = (float) (10 / display.getScale());
    float gap = (float) (5 / display.getScale());
    float distance = dash;
    boolean isDash = true;

    Path dashPath = new Path();
    dashPath.incReserve((int) (2 * length / (dash + gap)));

    dashPath.moveTo((float) points.get(0).getX(), (float) points.get(0).getY());

    while (distance < length) {
        // get a point from the main path
        pm.getPosTan(distance, coordinates, null);

        if (isDash) {
            dashPath.lineTo(coordinates[0], coordinates[1]);
            distance += gap;
        } else {
            dashPath.moveTo(coordinates[0], coordinates[1]);
            distance += dash;
        }

        isDash = !isDash;
    }

    // add a rest from the main path
    if (isDash) {
        distance = distance - dash;
        float rest = length - distance;

        if (rest > (float) (1 / display.getScale())) {
            distance = length - 1;
            pm.getPosTan(distance, coordinates, null);
            dashPath.lineTo(coordinates[0], coordinates[1]);
        }
    }

    display.drawPath(dashPath, paint);

    return mainPath;
}