Example usage for org.jfree.data.xy WindDataset getWindDirection

Introduction

In this page you can find the example usage for org.jfree.data.xy WindDataset getWindDirection.

Prototype

public Number getWindDirection(int series, int item);

Source Link

Document

Returns the wind direction (should be in the range 0 to 12, corresponding to the positions on an upside-down clock face).

Usage

From source file:no.met.jtimeseries.chart.XYWindArrowRenderer.java

/**
 * Draws the visual representation of a single wind arrow.
 */// w  w w. java2 s  . c  om
@Override
public void drawItem(Graphics2D g2d, XYItemRendererState state, Rectangle2D plotArea, PlotRenderingInfo info,
        XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item,
        CrosshairState crosshairState, int pass) {
    resizeArrowByPlotHeight((int) plotArea.getHeight());
    // Needs a new graphics object to use translate() and rotate()
    Graphics2D g2 = (Graphics2D) g2d.create();
    g2.setRenderingHints(renderHints);
    RectangleEdge domainAxisLocation = plot.getDomainAxisEdge();
    double middleY = plotArea.getCenterY();

    WindDataset windData = (WindDataset) dataset;

    Number x = windData.getX(series, item);
    Number windDir = windData.getWindDirection(series, item);
    Number wforce = windData.getWindForce(series, item);

    double middleX = domainAxis.valueToJava2D(x.doubleValue(), plotArea, domainAxisLocation);

    g2.translate((int) middleX, (int) middleY);
    g2.setColor(Color.BLACK);

    if (wforce.doubleValue() <= zeroWindLimit) {
        drawCircle(g2);
    } else {
        g2.rotate(Math.toRadians(windDir.doubleValue() - 180));
        drawArrow(g2, wforce.doubleValue());

        if (useArrowHead) {
            g2.fill(getPolygonHead(arrowHeadSize, arrowHeight));
        } else {
            g2.draw(getCircleHead(arrowHeadSize, arrowHeight));
        }
    }
}

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