SwingChartUtil.java

package de.slothsoft.charts.swing;

import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;

import de.slothsoft.charts.Area;
import de.slothsoft.charts.Chart;
import de.slothsoft.charts.PaintInstructions;

/**
 * Some util classes to generate stuff surrounding the {@link Chart} in Swing.
 *
 * @author Stef Schulz
 * @since 0.2.0
 */

public final class SwingChartUtil {

    /**
     * Creates an {@link BufferedImage} from a chart.
     *
     * @param chart the chart to create an image for
     * @param imageWidth the image's width
     * @param imageHeight the image's height
     * @return an image
     */

    public static BufferedImage createImage(Chart chart, int imageWidth, int imageHeight) {
        final BufferedImage image = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_ARGB);
        final Graphics2D graphics2D = image.createGraphics();
        graphics2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        try {
            chart.paintOn(new Graphics2DGraphicContext(graphics2D),
                    new PaintInstructions(new Area(imageWidth, imageHeight)));
            return image;
        } finally {
            graphics2D.dispose();
        }
    }

    private SwingChartUtil() {
        // hide util class
    }
}