wat

    private boolean onTouchOrHoverEvent(MotionEvent event, boolean isTouch) {
        PaintMode mode = PaintMode.Draw;
        if ((buttonState & MotionEvent.BUTTON_TERTIARY) != 0) {
            // Splat paint when the middle mouse button or second stylus button is pressed.
            mode = PaintMode.Splat;
        } else if (isTouch || (buttonState & MotionEvent.BUTTON_PRIMARY) != 0) {
            // Draw paint when touching or if the primary button is pressed.
            mode = PaintMode.Draw;
        } else {
            // Otherwise, do not paint anything.
            return false;
        }

        final int action = event.getActionMasked();
        if (action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_MOVE) {
            final int N = event.getHistorySize();
            final int P = event.getPointerCount();
            for (int i = 0; i < N; i++) {
                for (int j = 0; j < P; j++) {
                    paint(getPaintModeForTool(event.getToolType(j), mode),
                            event.getHistoricalX(j, i),
                            event.getHistoricalY(j, i),
                            event.getHistoricalPressure(j, i),
                            event.getHistoricalTouchMajor(j, i),
                            event.getHistoricalTouchMinor(j, i),
                            event.getHistoricalOrientation(j, i),
                            event.getHistoricalAxisValue(MotionEvent.AXIS_DISTANCE, j, i),
                            event.getHistoricalAxisValue(MotionEvent.AXIS_TILT, j, i));
                }
            }
        }

        return true;
    }

    private void paint(PaintMode mode, float x, float y, float pressure,
            float major, float minor, float orientation,
            float distance, float tilt) {
        if (mBitmap != null) {
            if (major <= 0 || minor <= 0) {
                // If size is not available, use a default value.
                major = minor = 16;
            }

            switch (mode) {
                case Draw:
                    mPaint.setColor(COLORS[mColorIndex]);
                    mPaint.setAlpha(Math.min((int)(pressure * 128), 255));
                    drawOval(mCanvas, x, y, major, minor, orientation, mPaint);
                    break;

                case Erase:
                    mPaint.setColor(BACKGROUND_COLOR);
                    mPaint.setAlpha(Math.min((int)(pressure * 128), 255));
                    drawOval(mCanvas, x, y, major, minor, orientation, mPaint);
                    break;

                case Splat:
                    mPaint.setColor(COLORS[mColorIndex]);
                    mPaint.setAlpha(64);
                    drawSplat(mCanvas, x, y, orientation, distance, tilt, mPaint);
                    break;
            }
        }
        mFadeSteps = 0;
        invalidate();
    }