org.jxmapviewer.viewer.empty.EmptyTileFactory Maven / Gradle / Ivy

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/*
 * EmptyTileFactory.java
 *
 * Created on June 7, 2006, 4:58 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package org.jxmapviewer.viewer.empty;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;

import org.jxmapviewer.viewer.Tile;
import org.jxmapviewer.viewer.TileFactory;
import org.jxmapviewer.viewer.TileFactoryInfo;

/**
 * A null implementation of TileFactory. Draws empty areas.
 * @author joshy
 */
public class EmptyTileFactory extends TileFactory
{
    /** 
     * The empty tile image. 
     */
    private BufferedImage emptyTile;

    /** 
     * Creates a new instance of EmptyTileFactory 
     */
    public EmptyTileFactory()
    {
        this(new TileFactoryInfo("EmptyTileFactory 256x256", 1, 15, 17, 256, true, true, "", "x", "y", "z"));
    }

    /** 
     * Creates a new instance of EmptyTileFactory using the specified info. 
     * @param info the tile factory info
     */
    public EmptyTileFactory(TileFactoryInfo info)
    {
        super(info);
        int tileSize = info.getTileSize(info.getMinimumZoomLevel());
        emptyTile = new BufferedImage(tileSize, tileSize, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = emptyTile.createGraphics();
        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g.setColor(Color.GRAY);
        g.fillRect(0, 0, tileSize, tileSize);
        g.setColor(Color.WHITE);
        g.drawOval(10, 10, tileSize - 20, tileSize - 20);
        g.fillOval(70, 50, 20, 20);
        g.fillOval(tileSize - 90, 50, 20, 20);
        g.fillOval(tileSize / 2 - 10, tileSize / 2 - 10, 20, 20);
        g.dispose();
    }

    /**
     * Gets an instance of an empty tile for the given tile position and zoom on the world map.
     * @param x The tile's x position on the world map.
     * @param y The tile's y position on the world map.
     * @param zoom The current zoom level.
     */
    @Override
    public Tile getTile(int x, int y, int zoom)
    {
        return new Tile(x, y, zoom)
        {
            @Override
            public synchronized boolean isLoaded()
            {
                return true;
            }

            @Override
            public BufferedImage getImage()
            {
                return emptyTile;
            }

        };
    }

    @Override
    public void dispose()
    {
        // noop
    }

    /**
     * Override this method to load the tile using, for example, an ExecutorService.
     * @param tile The tile to load.
     */
    @Override
    protected void startLoading(Tile tile)
    {
        // noop
    }

}