com.rapidminer.gui.new_plotter.engine.jfreechart.renderer.FormattedScatterRenderer.java Source code

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Here is the source code for com.rapidminer.gui.new_plotter.engine.jfreechart.renderer.FormattedScatterRenderer.java

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/**
 * Copyright (C) 2001-2015 by RapidMiner and the contributors
 *
 * Complete list of developers available at our web site:
 *
 *      http://rapidminer.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.new_plotter.engine.jfreechart.renderer;

import com.rapidminer.gui.new_plotter.engine.jfreechart.RenderFormatDelegate;
import com.rapidminer.gui.new_plotter.engine.jfreechart.dataset.ValueSourceToMultiValueCategoryDatasetAdapter;
import com.rapidminer.gui.new_plotter.utility.DataStructureUtils;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;
import java.util.List;

import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.CategoryItemRendererState;
import org.jfree.chart.renderer.category.ScatterRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.util.ShapeUtilities;

/**
 * This renderer less flat than most other {@link FormattedRenderer}s, since by default the
 * ScatterRenderer draws all items in a category with the same shape and color. This renderer
 * overwrites the drawItem().
 * 
 * Needs a {@link ValueSourceToMultiValueCategoryDatasetAdapter} as dataset.
 * 
 * @author Marius Helf
 * 
 */
public class FormattedScatterRenderer extends ScatterRenderer implements FormattedRenderer {

    private static final long serialVersionUID = 1L;

    private RenderFormatDelegate formatDelegate = new RenderFormatDelegate();

    public FormattedScatterRenderer() {
        super();
    }

    @Override
    public RenderFormatDelegate getFormatDelegate() {
        return formatDelegate;
    }

    @Override
    public Paint getItemPaint(int seriesIdx, int valueIdx) {
        Paint paint = getFormatDelegate().getItemPaint(seriesIdx, valueIdx);
        if (paint == null) {
            paint = super.getItemPaint(seriesIdx, valueIdx);
        }
        return paint;
    }

    @Override
    public Shape getItemShape(int seriesIdx, int valueIdx) {
        Shape shapeFromDelegate = getFormatDelegate().getItemShape(seriesIdx, valueIdx);
        if (shapeFromDelegate == null) {
            return super.getItemShape(seriesIdx, valueIdx);
        } else {
            return shapeFromDelegate;
        }
    }

    /**
     * This function is taken directly from JFreeChart with adjustments to draw differently colored
     * items.
     * 
     * When updating JFreeChart this function must probably be adapted.
     * 
     */
    @Override
    public void drawItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot,
            CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column, int pass) {

        // do nothing if item is not visible
        if (!getItemVisible(row, column)) {
            return;
        }
        int visibleRow = state.getVisibleSeriesIndex(row);
        if (visibleRow < 0) {
            return;
        }
        int visibleRowCount = state.getVisibleSeriesCount();

        PlotOrientation orientation = plot.getOrientation();

        ValueSourceToMultiValueCategoryDatasetAdapter dataSet = (ValueSourceToMultiValueCategoryDatasetAdapter) dataset;
        List values = dataSet.getValues(row, column);
        if (values == null) {
            return;
        }
        int valueCount = values.size();
        for (int i = 0; i < valueCount; i++) {
            // current data point...
            double x1;
            if (getUseSeriesOffset()) {
                x1 = domainAxis.getCategorySeriesMiddle(column, dataset.getColumnCount(), visibleRow,
                        visibleRowCount, getItemMargin(), dataArea, plot.getDomainAxisEdge());
            } else {
                x1 = domainAxis.getCategoryMiddle(column, getColumnCount(), dataArea, plot.getDomainAxisEdge());
            }
            Number n = (Number) values.get(i);
            int idx = dataSet.getValueIndex(row, column, i);
            double value = n.doubleValue();
            double y1 = rangeAxis.valueToJava2D(value, dataArea, plot.getRangeAxisEdge());

            Shape shape = getItemShape(row, idx);
            if (orientation == PlotOrientation.HORIZONTAL) {
                shape = ShapeUtilities.createTranslatedShape(shape, y1, x1);
            } else if (orientation == PlotOrientation.VERTICAL) {
                shape = ShapeUtilities.createTranslatedShape(shape, x1, y1);
            }
            if (getItemShapeFilled(row, column)) {
                if (getUseFillPaint()) {
                    g2.setPaint(getItemFillPaint(row, column));
                } else {
                    g2.setPaint(getItemPaint(row, idx));
                }
                g2.fill(shape);
            }
            if (getDrawOutlines()) {
                if (getUseOutlinePaint()) {
                    g2.setPaint(getItemOutlinePaint(row, column));
                } else {
                    g2.setPaint(getItemPaint(row, idx));
                }
                g2.setStroke(getItemOutlineStroke(row, column));
                g2.draw(shape);
            }
        }
    }

    @Override
    public Paint getItemOutlinePaint(int seriesIdx, int valueIdx) {
        if (getFormatDelegate().isItemSelected(seriesIdx, valueIdx)) {
            return super.getItemOutlinePaint(seriesIdx, valueIdx);
        } else {
            return DataStructureUtils.setColorAlpha(Color.LIGHT_GRAY, 20);
        }
    }
}