ProjectionWrapper.java

/*
 * #%L
 * Wheelmap - App
 * %%
 * Copyright (C) 2011 - 2012 Michal Harakal - Michael Kroez - Sozialhelden e.V.
 * %%
 * Wheelmap App based on the Wheelmap Service by Sozialhelden e.V.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *         http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS-IS" BASIS
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
package org.wheelmap.android.overlays;

import org.mapsforge.android.maps.GeoPoint;
import org.mapsforge.android.maps.Projection;

import android.graphics.Point;

public class ProjectionWrapper implements Projection {

    private Projection mProjection;

    public ProjectionWrapper(Projection projection) {
        mProjection = projection;
    }

    @Override
    public GeoPoint fromPixels(int x, int y) {
        int desiredX = x + 20;
        int desiredY = x + 40;
        return mProjection.fromPixels(desiredX, desiredY);
    }

    @Override
    public float metersToPixels(float meters) {
        return mProjection.metersToPixels(meters);
    }

    @Override
    public float metersToPixels(float meters, byte zoom) {
        return mProjection.metersToPixels(meters, zoom);
    }

    @Override
    public Point toPixels(GeoPoint in, Point out) {
        Point outPoint = new Point();
        Point point = mProjection.toPixels(in, outPoint);
        if (point == null) {
            return null;
        }

        Point desiredPoint = new Point();
        desiredPoint.x = outPoint.x - 20;
        desiredPoint.y = outPoint.y - 40;

        if (out != null) {
            out.x = desiredPoint.x;
            out.y = desiredPoint.y;
        }

        return desiredPoint;
    }

    @Override
    public Point toPoint(GeoPoint in, Point out, byte zoom) {
        return mProjection.toPoint(in, out, zoom);
    }
}