Example usage for com.google.gwt.widgetideas.graphics.client GWTCanvas lineTo

Introduction

In this page you can find the example usage for com.google.gwt.widgetideas.graphics.client GWTCanvas lineTo.

Prototype

public void lineTo(double x, double y) 

Source Link

Document

Adds a line from the last point in the current path to the point defined by x and y.

Usage

From source file:com.google.caliper.cloud.client.BoxPlot.java

License:Apache License

public Widget create(int style, double max, MeasurementSet measurementSet, boolean useNanos) {
    /*//from  www. j  a v a 2 s. c om
     * Compute the five displayed values of the box plot from the measurements.
     *
     * a = minimum
     * b = lower quartile
     * c = median
     * d = upper quartile
     * e = maximum
     */
    List<Double> measurements = useNanos ? measurementSet.getMeasurementsRaw()
            : measurementSet.getMeasurementUnits();
    Collections.sort(measurements);
    int numMeasurements = measurements.size();
    double unitsPerPixel = max / maxWidth;
    int quartile = numMeasurements / 4;
    double a = measurements.get(0) / unitsPerPixel;
    double b = measurements.get(quartile) / unitsPerPixel;
    double c = measurements.get(numMeasurements / 2) / unitsPerPixel;
    double d = measurements.get(numMeasurements - (quartile > 0 ? quartile : 1)) / unitsPerPixel;
    double e = measurements.get(numMeasurements - 1) / unitsPerPixel;

    Color[] colors = Colors.forStyle(style);
    Color dark = colors[0];
    Color medium = colors[1];
    Color light = colors[2];

    GWTCanvas canvas = new GWTCanvas(maxWidth, maxHeight);
    if (numMeasurements > 3) {
        canvas.setFillStyle(dark);
        canvas.fillRect(0, 0, b, maxHeight);

        canvas.setFillStyle(medium);
        canvas.fillRect(b, 0, (c - b), maxHeight);

        canvas.setFillStyle(light);
        canvas.fillRect(c, 0, (d - c), maxHeight);

    } else {
        canvas.setFillStyle(dark);
        canvas.fillRect(0, 0, c, maxHeight);
    }

    if (numMeasurements > 1) {
        int quarterHeight = maxHeight / 4;
        int halfHeight = maxHeight / 2;

        canvas.setStrokeStyle(light);
        canvas.setLineWidth(1);

        // the |-- of the |--[ | ]---|
        if ((int) (a - b) != 0) {
            canvas.beginPath();
            canvas.moveTo(a, quarterHeight);
            canvas.lineTo(a, maxHeight - quarterHeight);
            canvas.stroke();
            canvas.beginPath();
            canvas.moveTo(a, halfHeight);
            canvas.lineTo(b, halfHeight);
            canvas.stroke();
        }

        // the ---| of the |--[ | ]---|
        if ((int) (e - d) != 0) {
            canvas.setStrokeStyle(dark);
            canvas.beginPath();
            canvas.moveTo(d, halfHeight);
            canvas.lineTo(e, halfHeight);
            canvas.stroke();
            canvas.beginPath();
            canvas.moveTo(e, quarterHeight);
            canvas.lineTo(e, maxHeight - quarterHeight);
            canvas.stroke();
        }
    }

    return canvas;
}

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From source file:org.utgenome.gwt.utgb.client.canvas.GWTGraphCanvas.java

License:Apache License

protected void drawWigGraph(GraphCanvas graphCanvas) {

    for (CompactWIGData data : graphCanvas.graphData) {

        // get graph color
        Color graphColor = new Color(DEFAULT_COLOR);
        if (style.color.isDefined()) {
            graphColor = new Color(style.color.get());
        } else if (data.getTrack().containsKey("color")) {
            String colorStr = data.getTrack().get("color");
            String c[] = colorStr.split(",");
            if (c.length == 3)
                graphColor = new Color(Integer.valueOf(c[0]), Integer.valueOf(c[1]), Integer.valueOf(c[2]));
        }//from w w w  . ja v  a  2 s .c o  m

        // draw graph
        GWTCanvas canvas = graphCanvas.canvas;

        canvas.saveContext();
        canvas.setLineWidth(1.0f);
        canvas.setStrokeStyle(graphColor);

        //canvas.scale(viewWindow.convertToPixelLength(graphCanvas.window.getSequenceLength()) / (double) data.getPixelSize(), 1.0f);

        float y2 = getYPosition(0.0f);

        // draw data graph
        final boolean isReverse = graphCanvas.window.isReverseStrand();
        final int pixelWidth = data.getData().length;

        float min = style.autoScale ? autoScaledMinValue : style.minValue;
        float max = style.autoScale ? autoScaledMaxValue : style.maxValue;

        for (int i = 0; i < pixelWidth; ++i) {
            float value = data.getData()[i];
            float y1;
            if (value == 0.0f) {
                if (!style.drawZeroValue)
                    continue;
                else {
                    y1 = y2 + ((min < max) ? -0.5f : 0.5f);
                }
            } else {
                y1 = getYPosition(value);
            }

            int x = i;
            if (isReverse) {
                x = pixelWidth - x - 1;
            }

            canvas.saveContext();
            canvas.beginPath();
            canvas.translate(x + 0.5f, 0);
            canvas.moveTo(0, y1);
            canvas.lineTo(0, y2);
            canvas.stroke();
            canvas.restoreContext();
        }
        canvas.restoreContext();
    }

}

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