TestTileLayer.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.tile.example;

import org.oscim.backend.canvas.Color;
import org.oscim.backend.canvas.Paint.Cap;
import org.oscim.core.GeometryBuffer;
import org.oscim.core.Tile;
import org.oscim.layers.tile.MapTile;
import org.oscim.layers.tile.TileLayer;
import org.oscim.layers.tile.TileLoader;
import org.oscim.layers.tile.TileManager;
import org.oscim.layers.tile.VectorTileRenderer;
import org.oscim.map.Map;
import org.oscim.renderer.bucket.LineBucket;
import org.oscim.renderer.bucket.RenderBuckets;
import org.oscim.theme.styles.LineStyle;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TestTileLayer extends TileLayer {
	static final Logger log = LoggerFactory.getLogger(TestTileLayer.class);

	public TestTileLayer(Map map) {
		super(map,
		      new TileManager(map, 10),
		      new VectorTileRenderer());
	}

	@Override
	protected TestTileLoader createLoader() {
		return new TestTileLoader(this);
	}

	static class TestTileLoader extends TileLoader {

		public TestTileLoader(TileLayer tileLayer) {
			super(tileLayer.getManager());
		}

		GeometryBuffer mGeom = new GeometryBuffer(128, 16);
		LineStyle mLineStyle = new LineStyle(Color.BLUE, 2f, Cap.ROUND);

		@Override
		public boolean loadTile(MapTile tile) {
			log.debug("load tile " + tile);
			RenderBuckets buckets = new RenderBuckets();
			tile.data = buckets;

			LineBucket lb = buckets.getLineBucket(0);
			lb.line = mLineStyle;
			lb.scale = 2;

			int m = 20;
			int s = Tile.SIZE - m * 2;
			GeometryBuffer g = mGeom;

			g.clear();
			g.startLine();
			g.addPoint(m, m);
			g.addPoint(m, s);
			g.addPoint(s, s);
			g.addPoint(s, m);
			g.addPoint(m, m);

			lb.addLine(g);

			return true;
		}

		@Override
		public void dispose() {
		}

		@Override
		public void cancel() {
		}

	}
}