Example usage for java.awt.geom GeneralPath closePath

Introduction

In this page you can find the example usage for java.awt.geom GeneralPath closePath.

Prototype

public final synchronized void closePath()

Source Link

Document

Closes the current subpath by drawing a straight line back to the coordinates of the last moveTo .

Usage

From source file:savant.view.tracks.ContinuousTrackRenderer.java

@Override
public void render(Graphics2D g2, GraphPaneAdapter gp) throws RenderingException {

    renderPreCheck();/*from   w w  w.j  av  a2  s . c  om*/

    AxisRange axisRange = (AxisRange) instructions.get(DrawingInstruction.AXIS_RANGE);
    gp.setXRange(axisRange.getXRange());
    gp.setYRange(axisRange.getYRange());

    if (gp.needsToResize())
        return;

    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

    ColourScheme cs = (ColourScheme) instructions.get(DrawingInstruction.COLOUR_SCHEME);
    Color fillcolor = cs.getColor(ColourKey.CONTINUOUS_FILL);
    Color linecolor = cs.getColor(ColourKey.CONTINUOUS_LINE);

    GeneralPath path = new GeneralPath();
    double xFormXPos = Double.NaN, xFormYPos = Double.NaN;

    double yPixel0 = gp.transformYPos(0.0);
    LOG.debug("h=" + gp.getHeight() + ", yMin=" + gp.getYRange().getFrom() + ", unitHeight="
            + gp.getUnitHeight() + " \u27A4 yPixel0=" + yPixel0);

    double maxData = 0;
    boolean haveOpenPath = false;
    boolean haveData = false;
    if (data != null) {
        for (int i = 0; i < data.size(); i++) {
            ContinuousRecord continuousRecord = (ContinuousRecord) data.get(i);
            int xPos = continuousRecord.getPosition();
            float yPos = continuousRecord.getValue();
            if (Float.isNaN(yPos)) {
                // Hit a position with no data.  May need to close off the current path.
                if (haveOpenPath) {
                    path.lineTo(xFormXPos, yPixel0);
                    path.closePath();
                    haveOpenPath = false;
                }
            } else {
                haveData = true;
                xFormXPos = gp.transformXPos(xPos);//+gp.getUnitWidth()/2;
                xFormYPos = gp.transformYPos(yPos);
                if (!haveOpenPath) {
                    // Start our path off with a vertical line.
                    path.moveTo(xFormXPos, yPixel0);
                    haveOpenPath = true;
                }
                path.lineTo(xFormXPos, xFormYPos);
                Rectangle2D rec = new Rectangle2D.Double(
                        xFormXPos - ((xFormXPos - path.getCurrentPoint().getX()) / 2), 0,
                        Math.max(xFormXPos - path.getCurrentPoint().getX(), 1), gp.getHeight());
                recordToShapeMap.put(continuousRecord, rec);
                xFormXPos = gp.transformXPos(xPos + 1);
                path.lineTo(xFormXPos, xFormYPos);
            }
            if (yPos > maxData) {
                maxData = yPos;
            }
        }
    }
    if (!haveData) {
        throw new RenderingException("No data in range", RenderingException.INFO_PRIORITY);
    }
    if (haveOpenPath) {
        // Path needs to be closed.
        path.lineTo(xFormXPos, yPixel0);
        path.closePath();
    }

    g2.setColor(fillcolor);
    g2.fill(path);
    g2.setColor(linecolor);
    g2.draw(path);

    if (axisRange.getYRange().getFrom() < 0) {
        g2.setColor(Color.darkGray);
        g2.draw(new Line2D.Double(0.0, yPixel0, gp.getWidth(), yPixel0));
    }
}