Example usage for javafx.scene.canvas GraphicsContext beginPath

Introduction

In this page you can find the example usage for javafx.scene.canvas GraphicsContext beginPath.

Prototype

public void beginPath() 

Source Link

Document

Resets the current path to empty.

Usage

From source file:org.nmrfx.processor.gui.spectra.DrawSpectrum.java

private void genContourPath(DatasetAttributes dataGenerator, AXMODE[] axModes, Contour contours,
        final int coordIndex, GraphicsContext g2) {
    int lineCount = contours.getLineCount(coordIndex);
    float scale = Contour.getScaleFac() / Short.MAX_VALUE;
    double cxOffset = contours.xOffset;
    double cyOffset = contours.yOffset;
    g2.beginPath();
    Dataset dataset = dataGenerator.getDataset();
    for (int iLine = 0; iLine < lineCount; iLine += 4) {
        if (cancelled) {
            System.out.println("can response1");
            break;
        }/*  w  ww .j a  va 2s .  c  o m*/
        double xPoint1 = scale * contours.coords[coordIndex][iLine] + cxOffset;
        double xPoint2 = scale * contours.coords[coordIndex][iLine + 2] + cxOffset;
        double yPoint1 = scale * contours.coords[coordIndex][iLine + 1] + cyOffset;
        double yPoint2 = scale * contours.coords[coordIndex][iLine + 3] + cyOffset;
        xPoint1 = dataset.pointToPPM(dataGenerator.dim[0], xPoint1);
        xPoint2 = dataset.pointToPPM(dataGenerator.dim[0], xPoint2);
        yPoint1 = dataset.pointToPPM(dataGenerator.dim[1], yPoint1);
        yPoint2 = dataset.pointToPPM(dataGenerator.dim[1], yPoint2);

        double x1 = axes[0].getDisplayPosition(xPoint1);
        double x2 = axes[0].getDisplayPosition(xPoint2);
        double y1 = axes[1].getDisplayPosition(yPoint1);
        double y2 = axes[1].getDisplayPosition(yPoint2);

        g2.moveTo(x1, y1);
        g2.lineTo(x2, y2);
    }
    g2.stroke();
}

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From source file:qupath.lib.gui.plots.ScatterPlot.java

public void drawPlot(GraphicsContext g, Rectangle2D region, int maxPoints) {

    g.save();//from  w  w  w  .  ja  v  a2s .c  o m

    g.beginPath();
    g.moveTo(region.getMinX(), region.getMinY());
    g.lineTo(region.getMaxX(), region.getMinY());
    g.lineTo(region.getMaxX(), region.getMaxY());
    g.lineTo(region.getMinX(), region.getMaxY());
    g.closePath();
    g.clip();

    //      int pad = 10;
    double scaleX = region.getWidth() / (maxX - minX);
    double scaleY = region.getHeight() / (maxY - minY);

    g.setLineWidth(1.5f);

    //      g.setStroke(javafx.scene.paint.Color.GRAY);
    //      g.strokeRect(region.getX(), region.getY(), region.getWidth(), region.getHeight());

    g.translate(region.getMinX(), region.getMinY());

    //      g2d.drawLine(0, 0, 0, region.height);
    //      g2d.drawLine(0, region.height, region.width, region.height);

    double increment;
    if (maxPoints < 0 || x.length <= maxPoints)
        increment = 1;
    else
        increment = (double) x.length / maxPoints;

    for (double i = 0; i < x.length; i += increment) {
        int ind = (int) i;
        double xx = x[ind];
        double yy = y[ind];
        //         // Skip if out of range
        //         if (xx < minX || xx > maxX || yy < minY || yy > maxY)
        //            continue;

        double xo = (xx - minX) * scaleX - markerSize / 2;
        double yo = region.getHeight() - (yy - minY) * scaleY - markerSize / 2;

        Color cDraw = colorDraw == null ? null : colorDraw[ind];
        if (fillMarkers) {
            Color cFill = colorFill[ind] == null ? cDraw : colorFill[ind];
            if (cFill != null) {
                g.setFill(cFill);
                g.fillOval(xo, yo, markerSize, markerSize);
                // Don't need to draw if it would be the same color anyway
                if (cFill == cDraw)
                    continue;
            }
        }
        if (cDraw != null) {
            g.setStroke(cDraw);
            g.strokeOval(xo, yo, markerSize, markerSize);
        }
    }

    g.restore();
}

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