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package cgeo.geocaching.maps;
import cgeo.geocaching.CgeoApplication;
import cgeo.geocaching.R;
import cgeo.geocaching.location.Geopoint;
import cgeo.geocaching.maps.interfaces.GeoPointImpl;
import cgeo.geocaching.maps.interfaces.MapItemFactory;
import cgeo.geocaching.maps.interfaces.MapProjectionImpl;
import cgeo.geocaching.settings.Settings;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.Point;
import android.location.Location;
import java.util.ArrayList;
public class PositionDrawer {
private Location coordinates = null;
private GeoPointImpl location = null;
private float heading = 0f;
private Paint accuracyCircle = null;
private Paint historyLine = null;
private Paint historyLineShadow = null;
private final Point center = new Point();
private final Point left = new Point();
private Bitmap arrow = null;
private int widthArrowHalf = 0;
private int heightArrowHalf = 0;
private PaintFlagsDrawFilter setfil = null;
private PaintFlagsDrawFilter remfil = null;
private final PositionHistory positionHistory = new PositionHistory();
private final MapItemFactory mapItemFactory;
public PositionDrawer() {
this.mapItemFactory = Settings.getMapProvider().getMapItemFactory();
}
void drawPosition(final Canvas canvas, final MapProjectionImpl projection) {
if (coordinates == null || location == null) {
return;
}
if (accuracyCircle == null) {
accuracyCircle = new Paint();
accuracyCircle.setAntiAlias(true);
accuracyCircle.setStrokeWidth(1.0f);
}
if (historyLine == null) {
historyLine = new Paint();
historyLine.setAntiAlias(true);
historyLine.setStrokeWidth(3.0f);
historyLine.setColor(0xFFFFFFFF);
}
if (historyLineShadow == null) {
historyLineShadow = new Paint();
historyLineShadow.setAntiAlias(true);
historyLineShadow.setStrokeWidth(7.0f);
historyLineShadow.setColor(0x66000000);
}
if (setfil == null) {
setfil = new PaintFlagsDrawFilter(0, Paint.FILTER_BITMAP_FLAG);
}
if (remfil == null) {
remfil = new PaintFlagsDrawFilter(Paint.FILTER_BITMAP_FLAG, 0);
}
canvas.setDrawFilter(setfil);
final double latitude = coordinates.getLatitude();
final double longitude = coordinates.getLongitude();
final float accuracy = coordinates.getAccuracy();
final float[] result = new float[1];
Location.distanceBetween(latitude, longitude, latitude, longitude + 1, result);
final float longitudeLineDistance = result[0];
final Geopoint leftCoords = new Geopoint(latitude, longitude - accuracy / longitudeLineDistance);
final GeoPointImpl leftGeo = mapItemFactory.getGeoPointBase(leftCoords);
projection.toPixels(leftGeo, left);
projection.toPixels(location, center);
final int radius = center.x - left.x;
accuracyCircle.setColor(0x66000000);
accuracyCircle.setStyle(Style.STROKE);
canvas.drawCircle(center.x, center.y, radius, accuracyCircle);
accuracyCircle.setColor(0x08000000);
accuracyCircle.setStyle(Style.FILL);
canvas.drawCircle(center.x, center.y, radius, accuracyCircle);
positionHistory.rememberTrailPosition(coordinates);
if (Settings.isMapTrail()) {
// always add current position to drawn history to have a closed connection
final ArrayList<Location> paintHistory = new ArrayList<>(positionHistory.getHistory());
paintHistory.add(coordinates);
final int size = paintHistory.size();
if (size > 1) {
int alphaCnt = size - 201;
if (alphaCnt < 1) {
alphaCnt = 1;
}
final Point pointNow = new Point();
final Point pointPrevious = new Point();
final Location prev = paintHistory.get(0);
projection.toPixels(mapItemFactory.getGeoPointBase(new Geopoint(prev)), pointPrevious);
for (int cnt = 1; cnt < size; cnt++) {
final Location now = paintHistory.get(cnt);
projection.toPixels(mapItemFactory.getGeoPointBase(new Geopoint(now)), pointNow);
final int alpha;
if ((alphaCnt - cnt) > 0) {
alpha = 255 / (alphaCnt - cnt);
}
else {
alpha = 255;
}
historyLineShadow.setAlpha(alpha);
historyLine.setAlpha(alpha);
canvas.drawLine(pointPrevious.x, pointPrevious.y, pointNow.x, pointNow.y, historyLineShadow);
canvas.drawLine(pointPrevious.x, pointPrevious.y, pointNow.x, pointNow.y, historyLine);
pointPrevious.set(pointNow.x, pointNow.y);
}
}
}
if (arrow == null) {
arrow = BitmapFactory.decodeResource(CgeoApplication.getInstance().getResources(), R.drawable.my_location_chevron);
widthArrowHalf = arrow.getWidth() / 2;
heightArrowHalf = arrow.getHeight() / 2;
}
final int marginLeft = center.x - widthArrowHalf;
final int marginTop = center.y - heightArrowHalf;
final Matrix matrix = new Matrix();
matrix.setRotate(heading, widthArrowHalf, heightArrowHalf);
matrix.postTranslate(marginLeft, marginTop);
canvas.drawBitmap(arrow, matrix, null);
canvas.setDrawFilter(remfil);
}
public ArrayList<Location> getHistory() {
return positionHistory.getHistory();
}
public void setHistory(final ArrayList<Location> history) {
positionHistory.setHistory(history);
}
public void setHeading(final float bearingNow) {
heading = bearingNow;
}
public float getHeading() {
return heading;
}
public void setCoordinates(final Location coordinatesIn) {
coordinates = coordinatesIn;
location = mapItemFactory.getGeoPointBase(new Geopoint(coordinates));
}
public Location getCoordinates() {
return coordinates;
}
}
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