/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.plotter.charts;

import java.awt.Paint;

import org.jfree.chart.renderer.PaintScale;
import org.jfree.chart.renderer.xy.AbstractXYItemRenderer;
import org.jfree.chart.renderer.xy.XYBlockRenderer;
import org.jfree.ui.RectangleAnchor;

import com.rapidminer.datatable.DataTable;
import com.rapidminer.gui.plotter.ColorProvider;
import com.rapidminer.gui.plotter.PlotterConfigurationModel;

/**
 * This is the block chart plotter based on JFreeChart.
 * 
 * @author Ingo Mierswa
 */
public class BlockChartPlotter extends Abstract2DChartPlotter {

	public BlockChartPlotter(PlotterConfigurationModel settings, DataTable dataTable) {
		super(settings, dataTable);
		
	}

	public BlockChartPlotter(PlotterConfigurationModel settings) {
		super(settings);
	}

	private static final long serialVersionUID = -5231467872475202473L;

    public static class BlockPaintScale implements PaintScale {

    	private ColorProvider colorProvider = new ColorProvider();
    	
    	private double minColor;
    	
    	private double maxColor;
    	
    	public BlockPaintScale(double minColor, double maxColor) {
    		this.minColor = minColor;
    		this.maxColor = maxColor;
    	}
    	
        public Paint getPaint(double z) {
        	double normalized = (z - minColor) / (maxColor - minColor);
			return colorProvider.getPointColor(normalized);
			
        	/*
            float z01 = (float) z / 198 ;           
           
            float B = 1;

            float S = (float) Math.max(0.1, Math.abs(2*z01 - 1) );
           
            float hRed  = 0.0f;
            float hBlue = 0.7f;
            float H = hBlue - z01*(hBlue-hRed);

            // get HSB color, no transparency           
            Color c = Color.getHSBColor( H,S,B );
           
            // adjust transparency here: try 150 instead of 255
            // will lead to same grid effect
            return new Color(c.getRed(),c.getGreen(),c.getBlue(), 255);   
            */                    
        }

        public double getUpperBound() {
            return maxColor;
        }

        public double getLowerBound() {
            return minColor;
        }
    } 
    
	@Override
	public AbstractXYItemRenderer getItemRenderer(boolean nominal, int size, double minColor, double maxColor) {
        XYBlockRenderer renderer = new XYBlockRenderer();
        renderer.setPaintScale(new BlockPaintScale(minColor, maxColor)); 
        renderer.setBlockAnchor(RectangleAnchor.CENTER); 
        
        // if Block dimension is increased (e.g 1.2x1.2), the grid effect gets bigger
        // so it could be that blocks are overlapping a little
        // but if Block dimension is decreased (e.g. 0.9x0.9), each rectangle seems to have
        // a less-transparent border (you have to zoom-in to notice), and that could be the cause of the grid effect.
        //renderer.setBlockHeight(1.0);
        //renderer.setBlockWidth(1.0); 
        
        return renderer;
	}
	
	@Override
	public String getPlotterName() {
		return PlotterConfigurationModel.BLOCK_PLOT;
	}
}