eu.limetri.client.mapviewer.layer.weather.painter.WeatherOverlayPainter Maven / Gradle / Ivy

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MapViewer Weather layer project
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/**
 * Copyright (C) 2008-2012 AgroSense Foundation.
 *
 * AgroSense is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * There are special exceptions to the terms and conditions of the GPLv3 as it
 * is applied to this software, see the FLOSS License Exception
 * .
 *
 * AgroSense 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * AgroSense. If not, see .
 */
package eu.limetri.client.mapviewer.layer.weather.painter;

import eu.limetri.client.mapviewer.data.Tile;
import eu.limetri.client.mapviewer.data.TileFactoryInfo;
import eu.limetri.client.mapviewer.layer.weather.tilefactory.WeatherFactory;
import eu.limetri.client.mapviewer.layer.weather.tilefactory.WeatherTileFactoryInfo;
import eu.limetri.client.mapviewer.swing.JXMapViewer;
import eu.limetri.client.mapviewer.swing.impl.OfflineTileFactorySwing;
import eu.limetri.client.mapviewer.swing.overlay.AbstractOverlayPainter;
import java.awt.AlphaComposite;
import java.awt.Composite;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

/**
 *
 * @author Frantisek Post
 */
public class WeatherOverlayPainter extends AbstractOverlayPainter {

    private Image loadingImage;
    OfflineTileFactorySwing tileFactory;
    private TileLoadListener tileLoadListener = new TileLoadListener();
    JXMapViewer mapViewer;
    Graphics2D graphics;
    WeatherFactory weatherFactory;

    public WeatherOverlayPainter(String mapType, String title) {
        TileFactoryInfo factoryInfo = new WeatherTileFactoryInfo(mapType);
        tileFactory = new OfflineTileFactorySwing(factoryInfo);
        loadingImage = new BufferedImage(256, 256, BufferedImage.TYPE_INT_RGB);
        weatherFactory = new WeatherFactory();
        init();
        setName(title);
    }
    
    private void init() {
        setVisible(false);
    }

    @Override
    public void setVisible(boolean visible) {
        boolean oldVisible = isVisible();
        super.setVisible(visible); 
        if (oldVisible && !visible && mapViewer != null) {
            mapViewer.repaint();
        }
    }
    
    @Override
    public void paint(Graphics2D g, JXMapViewer mapviewer, int width, int height) {
        
        if (!visible) {
            return;
        }
        
        Rectangle viewportBounds = mapviewer.getViewportBounds();

        if (this.mapViewer == null) {
            this.mapViewer = mapviewer;
            this.graphics = g;
        }

        Graphics2D g2 = (Graphics2D) g.create();
        int rule = AlphaComposite.SRC_OVER;
         Composite comp = AlphaComposite.getInstance(rule , 0.3f );
         g2.setComposite(comp );

        int zoom = mapviewer.getZoom();

        int size = tileFactory.getTileSize(zoom);

        // calculate the "visible" viewport area in tiles
        int numWide = viewportBounds.width / size + 2;
        int numHigh = viewportBounds.height / size + 2;

        TileFactoryInfo info = tileFactory.getInfo();
        int tpx = (int) Math.floor(viewportBounds.getX() / info.getTileSize(0));
        int tpy = (int) Math.floor(viewportBounds.getY() / info.getTileSize(0));

        // fetch the tiles from the factory and store them in the tiles cache
        // attach the tileLoadListener
        for (int x = 0; x <= numWide; x++) {
            for (int y = 0; y <= numHigh; y++) {
                int itpx = x + tpx;// topLeftTile.getX();
                int itpy = y + tpy;// topLeftTile.getY();
                // only proceed if the specified tile point lies within the area
                // being painted
                if (g2.getClipBounds().intersects(new Rectangle(itpx * size - viewportBounds.x, itpy * size - viewportBounds.y, size, size))) {

                    Tile tile = tileFactory.getTile(itpx, itpy, zoom);

                    if (!tile.isLoaded()) {
                        tile.addUniquePropertyChangeListener("loaded", tileLoadListener); // this is a filthy hack
                    }

                    int ox = ((itpx * tileFactory.getTileSize(zoom)) - viewportBounds.x);
                    int oy = ((itpy * tileFactory.getTileSize(zoom)) - viewportBounds.y);

                    if (tile.isLoaded()) {
                        g2.drawImage(tile.getImage(), ox, oy, null);
                    }  else {
                        //show resized image while loading
                        Tile superTile = tileFactory.getTile(itpx / 2, itpy / 2, zoom + 1);

                        if (superTile.isLoaded()) {
                            int offX = (itpx % 2) * size / 2;
                            int offY = (itpy % 2) * size / 2;
                            g2.drawImage(superTile.getImage(), ox, oy, ox + size, oy + size, offX, offY, offX + size / 2, offY + size / 2, null);
                        }
                    }
                }
            }
        }
        g2.dispose();
    }

    public Image getLoadingImage() {
        return loadingImage;
    }

    @Override
    protected void processMapEvent(MouseEvent event) {
        //noop
    }

    private final class TileLoadListener implements PropertyChangeListener {

        @Override
        public void propertyChange(PropertyChangeEvent evt) {
            
            if (visible && Tile.LOADED.equals(evt.getPropertyName()) && Boolean.TRUE.equals(evt.getNewValue()) && mapViewer != null) {
                mapViewer.repaint();
            }
            
        }
    }

}