eu.limetri.client.mapviewer.layer.weather.component.legend.AbstractLegendPanel Maven / Gradle / Ivy

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MapViewer Weather layer project

There is a newer version: 1.4.4

/**
 * 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.component.legend;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.beans.Transient;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import javax.swing.JPanel;

/**
 * 
 * @author Frantisek Post
 */
public class AbstractLegendPanel extends JPanel {

	Map legendMap;

	private static final int LEGEND_HEIGHT = 200;
	private static final int LEGEND_WIDTH = 60;

	private double elementHeight;

	public AbstractLegendPanel() {

	}

	public void setMap(Map legendMap) {
		this.legendMap = legendMap;
		elementHeight = LEGEND_HEIGHT / legendMap.size();
	}

	@Override
	@Transient
	public Dimension getPreferredSize() {
		return new Dimension(LEGEND_WIDTH, LEGEND_HEIGHT);
	}
	
	@Override
	public void paint(Graphics g) {
		Graphics2D g2d = (Graphics2D) g.create();

		int textHeight = g2d.getFontMetrics().getAscent()*3/4; //number height could be 75% of the ascent
		double textOffset = (elementHeight - textHeight) / 2;
		
		g2d.setColor(Color.WHITE);
		g2d.fillRect(0, 0, getWidth(), getHeight());

		int width = LEGEND_WIDTH / 4;
		int index = 0;
		for (Entry entry : legendMap.entrySet()) {
			g2d.setColor(entry.getValue());
			g2d.fillRect(LEGEND_WIDTH - width, (int) (index * elementHeight),
					width, (int) elementHeight);
			g2d.setColor(Color.BLACK);
			g2d.drawString(
					String.format("%.1f", entry.getKey()),
					10,
					(int) ((index + 1) * elementHeight - textOffset));
			index++;
		}

		g2d.dispose();
	}

}