Example usage for org.jfree.chart.plot CategoryPlot getForegroundAlpha

Introduction

In this page you can find the example usage for org.jfree.chart.plot CategoryPlot getForegroundAlpha.

Prototype

public float getForegroundAlpha() 

Source Link

Document

Returns the alpha-transparency for the plot foreground.

Usage

From source file:edu.cuny.jfree.chart.annotations.CategoryIntervalAnnotation.java

public void draw(final Graphics2D g2, final CategoryPlot plot, final Rectangle2D dataArea,
        final CategoryAxis domainAxis, final ValueAxis rangeAxis) {

    final AlphaComposite alphaComposite = AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
            plot.getForegroundAlpha());
    final Composite oldComposite = g2.getComposite();
    g2.setComposite(alphaComposite);/* w ww  .  j a  v a2  s. c om*/

    final CategoryDataset dataset = plot.getDataset();
    final int catIndex = dataset.getColumnIndex(category);
    final int catCount = dataset.getColumnCount();
    double lineX1 = 0.0D;
    double lineY = 0.0D;
    double lineX2 = 0.0D;
    final PlotOrientation orientation = plot.getOrientation();
    final RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(plot.getDomainAxisLocation(), orientation);
    final RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(plot.getRangeAxisLocation(), orientation);
    if (orientation == PlotOrientation.HORIZONTAL) {
        lineY = domainAxis.getCategoryJava2DCoordinate(CategoryAnchor.MIDDLE, catIndex, catCount, dataArea,
                domainEdge);
        lineX1 = rangeAxis.valueToJava2D(value1, dataArea, rangeEdge);
        lineX2 = rangeAxis.valueToJava2D(value2, dataArea, rangeEdge);
    } else if (orientation == PlotOrientation.VERTICAL) {
        lineY = rangeAxis.valueToJava2D(value1, dataArea, rangeEdge);
        lineX1 = domainAxis.getCategoryJava2DCoordinate(CategoryAnchor.MIDDLE, catIndex, catCount, dataArea,
                domainEdge);
        lineX2 = domainAxis.getCategoryJava2DCoordinate(CategoryAnchor.MIDDLE, catIndex, catCount, dataArea,
                domainEdge);
    }
    g2.setPaint(paint);
    g2.setStroke(stroke);
    g2.drawLine((int) lineX1, (int) lineY, (int) lineX2, (int) lineY);

    g2.setComposite(oldComposite);
}

---