StandardDialRange.java 文件源码

/**
 * Draws the range.
 * 
 * @param g2  the graphics target.
 * @param plot  the plot.
 * @param frame  the dial's reference frame (in Java2D space).
 * @param view  the dial's view rectangle (in Java2D space).
 */
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, 
        Rectangle2D view) {

    Rectangle2D arcRectInner = DialPlot.rectangleByRadius(frame, 
            this.innerRadius, this.innerRadius);
    Rectangle2D arcRectOuter = DialPlot.rectangleByRadius(frame, 
            this.outerRadius, this.outerRadius);
    //double range = this.upperBound - this.lowerBound;

    DialScale scale = plot.getScaleForDataset(0);
    double angleMin = scale.valueToAngle(this.lowerBound);
    double angleMax = scale.valueToAngle(this.upperBound);

    Arc2D arcInner = new Arc2D.Double(arcRectInner, angleMin, 
            angleMax - angleMin, Arc2D.OPEN);
    Arc2D arcOuter = new Arc2D.Double(arcRectOuter, angleMax, 
            angleMin - angleMax, Arc2D.OPEN);

    g2.setPaint(this.paint);
    g2.setStroke(new BasicStroke(2.0f));
    g2.draw(arcInner);
    g2.draw(arcOuter);
}