Class ErrorBar

src/org/opensourcephysics/display/Dataset.java:1793–1831

ErrorBar for datapoints.

	 * ErrorBar for datapoints.
	 */
	class ErrorBar implements Drawable {
		double x, y, delx, dely; // the position and uncertainty of the data point
		int tick = 3;

		ErrorBar(double _x, double _y, double _delx, double _dely) {
			x = _x;
			y = _y;
			delx = _delx;
			dely = _dely;
		}

		/**
		 * Draws the error bars for a data point.
		 *
		 * @param panel
		 * @param g
		 */
		@Override
		public void draw(DrawingPanel panel, Graphics g) {
			// changed by D.Brown
			if (Double.isNaN(y)) {
				return;
			}
			int xpix = panel.xToPix(x);
			int xpix1 = panel.xToPix(x - delx);
			int xpix2 = panel.xToPix(x + delx);
			int ypix = panel.yToPix(y);
			int ypix1 = panel.yToPix(y - dely);
			int ypix2 = panel.yToPix(y + dely);
			g.setColor(errorBarColor);
			g.drawLine(xpix1, ypix, xpix2, ypix);
			g.drawLine(xpix, ypix1, xpix, ypix2);
			g.drawLine(xpix1, ypix - tick, xpix1, ypix + tick);
			g.drawLine(xpix2, ypix - tick, xpix2, ypix + tick);
			g.drawLine(xpix - tick, ypix1, xpix + tick, ypix1);
			g.drawLine(xpix - tick, ypix2, xpix + tick, ypix2);
		}

	}

	/**
	 * Returns the XML.ObjectLoader for this class.