MarkerSymbol.java

/*
 * Copyright 2013 Hannes Janetzek
 *
 * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
 *
 * This program is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.oscim.layers.marker;

import org.oscim.backend.canvas.Bitmap;
import org.oscim.core.PointF;
import org.oscim.layers.marker.MarkerItem.HotspotPlace;

public class MarkerSymbol {
	final Bitmap[] mBitmap;
	/** Hotspot offset */
	final PointF mOffset;
	final boolean mBillboard;

	public MarkerSymbol(Bitmap bitmap, float relX, float relY) {
		this(bitmap, relX, relY, true);
	}

	public MarkerSymbol(Bitmap bitmap, float relX, float relY, boolean billboard) {
		mBitmap = new Bitmap[1];
		mBitmap[0] = bitmap;
		mOffset = new PointF(relX, relY);
		mBillboard = billboard;
	}

	public MarkerSymbol(Bitmap bitmap, HotspotPlace hotspot) {
		this(bitmap, hotspot, true);
	}

	public MarkerSymbol(Bitmap bitmap, HotspotPlace hotspot, boolean billboard) {

		switch (hotspot) {
			case BOTTOM_CENTER:
				mOffset = new PointF(0.5f, 1);
				break;
			case TOP_CENTER:
				mOffset = new PointF(0.5f, 0);
				break;
			case RIGHT_CENTER:
				mOffset = new PointF(1, 0.5f);
				break;
			case LEFT_CENTER:
				mOffset = new PointF(0, 0.5f);
				break;
			case UPPER_RIGHT_CORNER:
				mOffset = new PointF(1, 0);
				break;
			case LOWER_RIGHT_CORNER:
				mOffset = new PointF(1, 1);
				break;
			case UPPER_LEFT_CORNER:
				mOffset = new PointF(0, 0);
				break;
			case LOWER_LEFT_CORNER:
				mOffset = new PointF(0, 1);
				break;
			default:
				mOffset = new PointF(0.5f, 0.5f);
		}

		mBitmap = new Bitmap[1];
		mBitmap[0] = bitmap;
		mBillboard = billboard;
	}

	public boolean isBillboard() {
		return mBillboard;
	}

	public PointF getHotspot() {
		return mOffset;
	}

	public Bitmap getBitmap() {
		return mBitmap[0];
	}

	public boolean isInside(float dx, float dy) {
		/* TODO handle no-billboard */
		int w = mBitmap[0].getWidth();
		int h = mBitmap[0].getHeight();
		float ox = -w * mOffset.x;
		float oy = -h * (1 - mOffset.y);

		return dx >= ox && dy >= oy && dx <= ox + w && dy <= oy + h;
	}
}