org.sonar.server.charts.deprecated.BaseChart.java Source code

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Here is the source code for org.sonar.server.charts.deprecated.BaseChart.java

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/*
 * Sonar, open source software quality management tool.
 * Copyright (C) 2008-2012 SonarSource
 * mailto:contact AT sonarsource DOT com
 *
 * Sonar is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * Sonar 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Sonar; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
 */
package org.sonar.server.charts.deprecated;

import org.jfree.chart.JFreeChart;
import org.jfree.chart.encoders.KeypointPNGEncoderAdapter;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.ui.RectangleEdge;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;

public abstract class BaseChart {

    public static final Color BASE_COLOR = new Color(51, 51, 51);
    public static final Color BASE_COLOR_LIGHT = new Color(204, 204, 204);
    public static final Color SERIE_BORDER_COLOR = new Color(67, 119, 166);

    public static final Color[] COLORS = { new Color(5, 141, 199), new Color(80, 180, 50), new Color(237, 86, 27),
            new Color(237, 239, 0), new Color(36, 203, 229), new Color(100, 229, 114), new Color(255, 150, 85) };

    public static final int FONT_SIZE = 13;

    private int width;
    private int height;

    protected BaseChart(int width, int height) {
        this.width = width;
        this.height = height;
    }

    public int getWidth() {
        return width;
    }

    public int getHeight() {
        return height;
    }

    public void setWidth(int width) {
        this.width = width;
    }

    public void setHeight(int height) {
        this.height = height;
    }

    protected Font getFont() {
        return new Font("SansSerif", Font.PLAIN, FONT_SIZE);
    }

    protected void configureChart(JFreeChart chart, boolean displayLegend) {
        if (displayLegend) {
            configureChart(chart, RectangleEdge.BOTTOM);
        } else {
            configureChart(chart, null);
        }
    }

    protected void configureChart(JFreeChart chart, RectangleEdge legendPosition) {
        chart.setBackgroundPaint(new Color(255, 255, 255, 0));
        chart.setBackgroundImageAlpha(0.0f);
        chart.setBorderVisible(false);
        chart.setAntiAlias(true);
        chart.setTextAntiAlias(true);

        chart.removeLegend();
        if (legendPosition != null) {
            LegendTitle legend = new LegendTitle(chart.getPlot());
            legend.setPosition(legendPosition);
            legend.setItemPaint(BASE_COLOR);
            chart.addSubtitle(legend);
        }
    }

    protected void configureChartTitle(JFreeChart chart, String title) {
        if (title != null && title.length() > 0) {
            TextTitle textTitle = new TextTitle(title);
            chart.setTitle(textTitle);
        }
    }

    protected abstract BufferedImage getChartImage() throws IOException;

    protected BufferedImage getBufferedImage(JFreeChart chart) {
        return chart.createBufferedImage(getWidth(), getHeight(), Transparency.BITMASK, null);
    }

    public void exportChartAsPNG(OutputStream out) throws IOException {
        KeypointPNGEncoderAdapter encoder = new KeypointPNGEncoderAdapter();
        encoder.setEncodingAlpha(true);
        encoder.encode(getChartImage(), out);
    }

    public byte[] exportChartAsPNG() throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        try {
            exportChartAsPNG(output);
        } finally {
            output.close();
        }
        return output.toByteArray();
    }

    protected BasicStroke getDashedStroke() {
        return getDashedStroke(1f);
    }

    protected BasicStroke getDashedStroke(float width) {
        return new BasicStroke(width, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f, new float[] { 5.0f },
                0.0f);
    }
}