Example usage for android.graphics Canvas drawPoint

List of usage examples for android.graphics Canvas drawPoint

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Introduction

In this page you can find the example usage for android.graphics Canvas drawPoint.

Prototype

public void drawPoint(float x, float y, @NonNull Paint paint)

Source Link

Document

Helper for drawPoints() for drawing a single point.

Usage

From source file:com.jwetherell.quick_response_code.DecoderActivity.java

protected void drawResultPoints(Bitmap barcode, Result rawResult) {
    ResultPoint[] points = rawResult.getResultPoints();
    if (points != null && points.length > 0) {
        Canvas canvas = new Canvas(barcode);
        Paint paint = new Paint();
        paint.setColor(getResources().getColor(R.color.result_image_border));
        paint.setStrokeWidth(3.0f);/*ww  w . j  a  va2  s. c o m*/
        paint.setStyle(Paint.Style.STROKE);
        Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
        canvas.drawRect(border, paint);

        paint.setColor(getResources().getColor(R.color.result_points));
        if (points.length == 2) {
            paint.setStrokeWidth(4.0f);
            drawLine(canvas, paint, points[0], points[1]);
        } else if (points.length == 4 && (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A
                || rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
            // Hacky special case -- draw two lines, for the barcode and
            // metadata
            drawLine(canvas, paint, points[0], points[1]);
            drawLine(canvas, paint, points[2], points[3]);
        } else {
            paint.setStrokeWidth(10.0f);
            for (ResultPoint point : points) {
                canvas.drawPoint(point.getX(), point.getY(), paint);
            }
        }
    }
}

From source file:org.madmatrix.zxing.android.CaptureActivity.java

/**
 * Superimpose a line for 1D or dots for 2D to highlight the key features of
 * the barcode.//from www.  j  a  va  2s  . c o m
 * 
 * @param barcode
 *            A bitmap of the captured image.
 * @param scaleFactor
 *            amount by which thumbnail was scaled
 * @param rawResult
 *            The decoded results which contains the points to draw.
 */
private void drawResultPoints(Bitmap barcode, float scaleFactor, Result rawResult) {
    ResultPoint[] points = rawResult.getResultPoints();
    if (points != null && points.length > 0) {
        Canvas canvas = new Canvas(barcode);
        Paint paint = new Paint();
        paint.setColor(getResources().getColor(R.color.result_points));
        if (points.length == 2) {
            paint.setStrokeWidth(4.0f);
            drawLine(canvas, paint, points[0], points[1], scaleFactor);
        } else if (points.length == 4 && (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A
                || rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
            // Hacky special case -- draw two lines, for the barcode and
            // metadata
            drawLine(canvas, paint, points[0], points[1], scaleFactor);
            drawLine(canvas, paint, points[2], points[3], scaleFactor);
        } else {
            paint.setStrokeWidth(10.0f);
            for (ResultPoint point : points) {
                if (point != null) {
                    canvas.drawPoint(scaleFactor * point.getX(), scaleFactor * point.getY(), paint);
                }
            }
        }
    }
}

From source file:tw.jwzhuang.ipcamviewer.devices.CaptureActivity.java

/**
 * Superimpose a line for 1D or dots for 2D to highlight the key features of
 * the barcode./*  w w w . java2 s .c  om*/
 * 
 * @param barcode
 *            A bitmap of the captured image.
 * @param rawResult
 *            The decoded results which contains the points to draw.
 */
private void drawResultPoints(Bitmap barcode, Result rawResult) {
    ResultPoint[] points = rawResult.getResultPoints();
    if (points != null && points.length > 0) {
        Canvas canvas = new Canvas(barcode);
        Paint paint = new Paint();
        paint.setColor(getResources().getColor(R.color.result_image_border));
        paint.setStrokeWidth(3.0f);
        paint.setStyle(Paint.Style.STROKE);
        Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
        canvas.drawRect(border, paint);

        paint.setColor(getResources().getColor(R.color.result_points));
        if (points.length == 2) {
            paint.setStrokeWidth(4.0f);
            drawLine(canvas, paint, points[0], points[1]);
        } else if (points.length == 4 && (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A
                || rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
            // Hacky special case -- draw two lines, for the barcode and
            // metadata
            drawLine(canvas, paint, points[0], points[1]);
            drawLine(canvas, paint, points[2], points[3]);
        } else {
            paint.setStrokeWidth(10.0f);
            for (ResultPoint point : points) {
                canvas.drawPoint(point.getX(), point.getY(), paint);
            }
        }
    }
}

From source file:com.cleverzone.zhizhi.capture.CaptureActivity.java

/**
 * Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode.
 *
 * @param barcode     A bitmap of the captured image.
 * @param scaleFactor amount by which thumbnail was scaled
 * @param rawResult   The decoded results which contains the points to draw.
 *///from   w ww  . j av  a  2s . c om
private void drawResultPoints(Bitmap barcode, float scaleFactor, Result rawResult) {
    ResultPoint[] points = rawResult.getResultPoints();
    if (points != null && points.length > 0) {
        Canvas canvas = new Canvas(barcode);
        Paint paint = new Paint();
        paint.setColor(getResources().getColor(R.color.result_points));
        if (points.length == 2) {
            paint.setStrokeWidth(4.0f);
            drawLine(canvas, paint, points[0], points[1], scaleFactor);
        } else if (points.length == 4 && (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A
                || rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
            // Hacky special case -- draw two lines, for the barcode and metadata
            drawLine(canvas, paint, points[0], points[1], scaleFactor);
            drawLine(canvas, paint, points[2], points[3], scaleFactor);
        } else {
            paint.setStrokeWidth(10.0f);
            for (ResultPoint point : points) {
                if (point != null) {
                    canvas.drawPoint(scaleFactor * point.getX(), scaleFactor * point.getY(), paint);
                }
            }
        }
    }
}

From source file:app.axe.imooc.zxing.app.CaptureActivity.java

/**
 * Superimpose a line for 1D or dots for 2D to highlight the key features of
 * the barcode.//w  w w  .j  av a2s .  c  om
 *
 * @param barcode   A bitmap of the captured image.
 * @param rawResult The decoded results which contains the points to draw.
 */
private void drawResultPoints(Bitmap barcode, Result rawResult) {
    ResultPoint[] points = rawResult.getResultPoints();
    if (points != null && points.length > 0) {
        Canvas canvas = new Canvas(barcode);
        Paint paint = new Paint();
        paint.setColor(getResources().getColor(R.color.result_image_border));
        paint.setStrokeWidth(3.0f);
        paint.setStyle(Paint.Style.STROKE);
        Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
        canvas.drawRect(border, paint);

        paint.setColor(getResources().getColor(R.color.result_points));
        if (points.length == 2) {
            paint.setStrokeWidth(4.0f);
            drawLine(canvas, paint, points[0], points[1]);
        } else if (points.length == 4 && (rawResult.getBarcodeFormat().equals(BarcodeFormat.UPC_A))
                || (rawResult.getBarcodeFormat().equals(BarcodeFormat.EAN_13))) {
            // Hacky special case -- draw two lines, for the barcode and
            // metadata
            drawLine(canvas, paint, points[0], points[1]);
            drawLine(canvas, paint, points[2], points[3]);
        } else {
            paint.setStrokeWidth(10.0f);
            for (ResultPoint point : points) {
                canvas.drawPoint(point.getX(), point.getY(), paint);
            }
        }
    }
}

From source file:com.xgf.inspection.qrcode.google.zxing.client.CaptureActivity.java

/**
 * Superimpose a line for 1D or dots for 2D to highlight the key features of
 * the barcode.//from w  ww  . j  av  a  2s .c o m
 *
 * @param barcode
 *            A bitmap of the captured image.
 * @param rawResult
 *            The decoded results which contains the points to draw.
 */
private void drawResultPoints(Bitmap barcode, Result rawResult) {
    ResultPoint[] points = rawResult.getResultPoints();
    if (points != null && points.length > 0) {
        Canvas canvas = new Canvas(barcode);
        Paint paint = new Paint();
        paint.setColor(getResources().getColor(R.color.result_points));
        if (points.length == 2) {
            paint.setStrokeWidth(4.0f);
            drawLine(canvas, paint, points[0], points[1]);
        } else if (points.length == 4 && (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A
                || rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
            // Hacky special case -- draw two lines, for the barcode and
            // metadata
            drawLine(canvas, paint, points[0], points[1]);
            drawLine(canvas, paint, points[2], points[3]);
        } else {
            paint.setStrokeWidth(10.0f);
            for (ResultPoint point : points) {
                canvas.drawPoint(point.getX(), point.getY(), paint);
            }
        }
    }
}

From source file:com.mylikes.likes.etchasketch.Slate.java

private void drawStrokeDebugInfo(Canvas c) {
    final int ROW_HEIGHT = 24;
    final int ROW_MARGIN = 6;
    final int COLUMN_WIDTH = 55;

    final float FIRM_PRESSURE_LOW = 0.85f;
    final float FIRM_PRESSURE_HIGH = 1.25f;

    if (mStrokeDebugGraph == null) {
        final int width = c.getWidth() - 128;
        final int height = ROW_HEIGHT * mStrokes.length + 2 * ROW_MARGIN;
        mStrokeDebugGraph = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        if (mStrokeDebugGraph == null) {
            throw new RuntimeException(
                    "drawStrokeDebugInfo: couldn't create debug bitmap (" + width + "x" + height + ")");
        }/* w ww.j av  a 2 s  .co  m*/
        mGraphPaint1 = new Paint(Paint.ANTI_ALIAS_FLAG);
    }

    Canvas graph = new Canvas(mStrokeDebugGraph);
    graph.save();
    graph.clipRect(new Rect(0, 0, COLUMN_WIDTH, graph.getHeight()));
    graph.drawColor(0, PorterDuff.Mode.CLEAR);
    graph.restore();

    int left = 4;
    int bottom = graph.getHeight() - ROW_MARGIN;
    final int STEP = 4;
    for (MarkersPlotter st : mStrokes) {
        float r = st.getLastPressure();

        if (r >= FIRM_PRESSURE_LOW && r <= FIRM_PRESSURE_HIGH)
            mGraphPaint1.setColor(0xFF33FF33);
        else if (r < FIRM_PRESSURE_LOW)
            mGraphPaint1.setColor(0xFF808080);
        else
            mGraphPaint1.setColor(0xFFFF8000);

        String s = (r < 0) ? "--"
                : String.format("%s %.4f", ((st.getLastTool() == MotionEvent.TOOL_TYPE_STYLUS) ? "S" : "F"), r);

        graph.drawText(s, left, bottom - 2, mGraphPaint1);

        if (mGraphX + COLUMN_WIDTH > graph.getWidth()) {
            mGraphX = 0;
            graph.save();
            graph.clipRect(new Rect(30, 0, graph.getWidth(), graph.getHeight()));
            graph.drawColor(0, PorterDuff.Mode.CLEAR);
            graph.restore();
        }

        if (r >= 0) {
            int barsize = (int) (r * ROW_HEIGHT);
            graph.drawRect(mGraphX + COLUMN_WIDTH, bottom - barsize, mGraphX + COLUMN_WIDTH + STEP, bottom,
                    mGraphPaint1);
        } else {
            graph.drawPoint(mGraphX + COLUMN_WIDTH + STEP, bottom, mGraphPaint1);
        }
        bottom -= (ROW_HEIGHT + ROW_MARGIN);
    }

    mGraphX += STEP;

    final int x = 96;
    final int y = 64;

    c.drawBitmap(mStrokeDebugGraph, x, y, null);
    invalidate(new Rect(x, y, x + c.getWidth(), y + c.getHeight()));
}

From source file:de.treichels.hott.ui.android.html.AndroidCurveImageGenerator.java

private Bitmap getBitmap(final Curve curve, final float scale, final boolean description) {
    final boolean pitchCurve = curve.getPoint()[0].getPosition() == 0;
    final float scale1 = scale * 0.75f; // smaller images on the android
    // platform/*from  ww w.ja  va2 s.  c  o m*/

    final Bitmap image = Bitmap.createBitmap((int) (10 + 200 * scale1), (int) (10 + 250 * scale1),
            Bitmap.Config.ARGB_8888);
    final Canvas canvas = new Canvas(image);

    final Paint backgroundPaint = new Paint();
    backgroundPaint.setColor(Color.WHITE);
    backgroundPaint.setStyle(Style.FILL);

    final Paint forgroundPaint = new Paint();
    forgroundPaint.setColor(Color.BLACK);
    forgroundPaint.setStyle(Style.STROKE);
    forgroundPaint.setStrokeWidth(1.0f);
    forgroundPaint.setStrokeCap(Cap.BUTT);
    forgroundPaint.setStrokeJoin(Join.ROUND);
    forgroundPaint.setStrokeMiter(0.0f);

    final Paint curvePaint = new Paint(forgroundPaint);
    curvePaint.setFlags(Paint.ANTI_ALIAS_FLAG);
    curvePaint.setStrokeWidth(2.0f);

    final Paint pointPaint = new Paint(curvePaint);
    pointPaint.setStrokeWidth(5.0f);
    pointPaint.setStyle(Style.FILL_AND_STROKE);

    final Paint helpLinePaint = new Paint(forgroundPaint);
    helpLinePaint.setColor(Color.GRAY);
    helpLinePaint.setPathEffect(new DashPathEffect(new float[] { 5.0f, 5.0f }, 2.5f));

    final Paint textPaint = new Paint(forgroundPaint);
    textPaint.setTypeface(Typeface.create(Typeface.SANS_SERIF, Typeface.BOLD));
    textPaint.setTextSize(12.0f);
    textPaint.setTextAlign(Align.CENTER);
    textPaint.setStyle(Style.FILL);

    canvas.drawRect(0, 0, 10 + 200 * scale1, 10 + 250 * scale1, backgroundPaint);
    canvas.drawRect(5, 5, 5 + 200 * scale1, 5 + 250 * scale1, forgroundPaint);

    canvas.drawLine(5, 5 + 25 * scale1, 5 + 200 * scale1, 5 + 25 * scale1, helpLinePaint);
    canvas.drawLine(5, 5 + 225 * scale1, 5 + 200 * scale1, 5 + 225 * scale1, helpLinePaint);
    if (!pitchCurve) {
        canvas.drawLine(5, 5 + 125 * scale1, 5 + 200 * scale1, 5 + 125 * scale1, helpLinePaint);
        canvas.drawLine(5 + 100 * scale1, 5, 5 + 100 * scale1, 5 + 250 * scale1, helpLinePaint);
    }

    if (curve.getPoint() != null) {
        int numPoints = 0;
        for (final CurvePoint p : curve.getPoint()) {
            if (p.isEnabled()) {
                numPoints++;
            }
        }

        final double[] xVals = new double[numPoints];
        final double[] yVals = new double[numPoints];

        int i = 0;
        for (final CurvePoint p : curve.getPoint()) {
            if (p.isEnabled()) {
                if (i == 0) {
                    xVals[i] = pitchCurve ? 0 : -100;
                } else if (i == numPoints - 1) {
                    xVals[i] = 100;
                } else {
                    xVals[i] = p.getPosition();
                }
                yVals[i] = p.getValue();

                if (description) {
                    float x0;
                    float y0;
                    if (pitchCurve) {
                        x0 = (float) (5 + xVals[i] * 2 * scale1);
                        y0 = (float) (5 + (225 - yVals[i] * 2) * scale1);
                    } else {
                        x0 = (float) (5 + (100 + xVals[i]) * scale1);
                        y0 = (float) (5 + (125 - yVals[i]) * scale1);
                    }

                    canvas.drawPoint(x0, y0, pointPaint);
                    if (y0 < 5 + 125 * scale1) {
                        canvas.drawRect(x0 - 4, y0 + 5, x0 + 3, y0 + 18, backgroundPaint);
                        canvas.drawText(Integer.toString(p.getNumber() + 1), x0 - 1, y0 + 16, textPaint);
                    } else {
                        canvas.drawRect(x0 - 4, y0 - 5, x0 + 3, y0 - 18, backgroundPaint);
                        canvas.drawText(Integer.toString(p.getNumber() + 1), x0 - 1, y0 - 7, textPaint);
                    }
                }

                i++;
            }
        }

        if (numPoints > 2 && curve.isSmoothing()) {
            final SplineInterpolator s = new SplineInterpolator();
            final PolynomialSplineFunction function = s.interpolate(xVals, yVals);

            float x0 = 5;
            float y0;
            if (pitchCurve) {
                y0 = (float) (5 + (225 - yVals[0] * 2) * scale1);
            } else {
                y0 = (float) (5 + (125 - yVals[0]) * scale1);
            }

            while (x0 < 4 + 200 * scale1) {
                final float x1 = x0 + 1;
                float y1;
                if (pitchCurve) {
                    y1 = (float) (5 + (225 - function.value((x1 - 5) / scale1 / 2) * 2) * scale1);
                } else {
                    y1 = (float) (5 + (125 - function.value((x1 - 5) / scale1 - 100)) * scale1);
                }

                canvas.drawLine(x0, y0, x1, y1, curvePaint);

                x0 = x1;
                y0 = y1;
            }
        } else {
            for (i = 0; i < numPoints - 1; i++) {
                float x0, y0, x1, y1;

                if (pitchCurve) {
                    x0 = (float) (5 + xVals[i] * 2 * scale1);
                    y0 = (float) (5 + (225 - yVals[i] * 2) * scale1);

                    x1 = (float) (5 + xVals[i + 1] * 2 * scale1);
                    y1 = (float) (5 + (225 - yVals[i + 1] * 2) * scale1);
                } else {
                    x0 = (float) (5 + (100 + xVals[i]) * scale1);
                    y0 = (float) (5 + (125 - yVals[i]) * scale1);

                    x1 = (float) (5 + (100 + xVals[i + 1]) * scale1);
                    y1 = (float) (5 + (125 - yVals[i + 1]) * scale1);
                }

                canvas.drawLine(x0, y0, x1, y1, curvePaint);
            }
        }
    }

    return image;
}