Examples with PointF android.graphics.PointF used on opensource projects

Example 31 with PointF

use of android.graphics.PointF in project carat by amplab.

the class BarLineChartTouchListener method performDrag.

/**
     * Performs all necessary operations needed for dragging.
     * 
     * @param event
     */
private void performDrag(MotionEvent event) {
    mMatrix.set(mSavedMatrix);
    PointF dragPoint = new PointF(event.getX(), event.getY());
    // check if axis is inverted
    if (!mChart.isInvertYAxisEnabled()) {
        mMatrix.postTranslate(dragPoint.x - mTouchStartPoint.x, dragPoint.y - mTouchStartPoint.y);
    } else {
        mMatrix.postTranslate(dragPoint.x - mTouchStartPoint.x, -(dragPoint.y - mTouchStartPoint.y));
    }
}

Example 32 with PointF

use of android.graphics.PointF in project carat by amplab.

the class Chart method getMarkerPosition.

/**
     * Returns the actual position in pixels of the MarkerView for the given
     * Entry in the given DataSet.
     *
     * @param xIndex
     * @param dataSetIndex
     * @return
     */
private float[] getMarkerPosition(Entry e, int dataSetIndex) {
    float xPos = e.getXIndex();
    // CandleStickChart
    if (this instanceof CandleStickChart)
        xPos += 0.5f;
    else if (this instanceof BarChart) {
        BarData bd = (BarData) mData;
        float space = bd.getGroupSpace();
        float j = mData.getDataSetByIndex(dataSetIndex).getEntryPosition(e);
        float x = (j * (mData.getDataSetCount() - 1)) + dataSetIndex + space * j + space / 2f + 0.5f;
        xPos += x;
    } else if (this instanceof RadarChart) {
        RadarChart rc = (RadarChart) this;
        float angle = rc.getSliceAngle() * e.getXIndex() + rc.getRotationAngle();
        float val = e.getVal() * rc.getFactor();
        PointF c = getCenterOffsets();
        PointF p = new PointF((float) (c.x + val * Math.cos(Math.toRadians(angle))), (float) (c.y + val * Math.sin(Math.toRadians(angle))));
        return new float[] { p.x, p.y };
    }
    // position of the marker depends on selected value index and value
    float[] pts = new float[] { xPos, e.getVal() * mPhaseY };
    mTrans.pointValuesToPixel(pts);
    return pts;
}

Example 33 with PointF

use of android.graphics.PointF in project carat by amplab.

the class RadarChart method drawWeb.

/**
     * Draws the spider web.
     */
private void drawWeb() {
    if (!mDrawWeb)
        return;
    float sliceangle = getSliceAngle();
    // calculate the factor that is needed for transforming the value to
    // pixels
    float factor = getFactor();
    PointF c = getCenterOffsets();
    // draw the web lines that come from the center
    mWebPaint.setStrokeWidth(mWebLineWidth);
    mWebPaint.setColor(mWebColor);
    mWebPaint.setAlpha(mWebAlpha);
    for (int i = 0; i < mData.getXValCount(); i++) {
        PointF p = getPosition(c, mYChartMax * factor, sliceangle * i + mRotationAngle);
        mDrawCanvas.drawLine(c.x, c.y, p.x, p.y, mWebPaint);
    }
    // draw the inner-web
    mWebPaint.setStrokeWidth(mInnerWebLineWidth);
    mWebPaint.setColor(mWebColorInner);
    mWebPaint.setAlpha(mWebAlpha);
    int labelCount = mYLabels.mEntryCount;
    for (int j = 0; j < labelCount; j++) {
        for (int i = 0; i < mData.getXValCount(); i++) {
            float r = ((mYChartMax / labelCount) * (j + 1)) * factor;
            PointF p1 = getPosition(c, r, sliceangle * i + mRotationAngle);
            PointF p2 = getPosition(c, r, sliceangle * (i + 1) + mRotationAngle);
            mDrawCanvas.drawLine(p1.x, p1.y, p2.x, p2.y, mWebPaint);
        }
    }
}

Example 34 with PointF

use of android.graphics.PointF in project carat by amplab.

the class RadarChart method drawYLabels.

/**
     * Draws the y-labels of the RadarChart.
     */
private void drawYLabels() {
    if (!mDrawYLabels)
        return;
    mYLabelPaint.setTypeface(mYLabels.getTypeface());
    mYLabelPaint.setTextSize(mYLabels.getTextSize());
    mYLabelPaint.setColor(mYLabels.getTextColor());
    PointF c = getCenterOffsets();
    float factor = getFactor();
    int labelCount = mYLabels.mEntryCount;
    for (int j = 0; j < labelCount; j++) {
        if (j == labelCount - 1 && mYLabels.isDrawTopYLabelEntryEnabled() == false)
            break;
        float r = ((mYChartMax / labelCount) * j) * factor;
        PointF p = getPosition(c, r, mRotationAngle);
        float val = r / factor;
        String label = Utils.formatNumber(val, mYLabels.mDecimals, mYLabels.isSeparateThousandsEnabled());
        if (mYLabels.isDrawUnitsInYLabelEnabled())
            mDrawCanvas.drawText(label + mUnit, p.x + 10, p.y - 5, mYLabelPaint);
        else {
            mDrawCanvas.drawText(label, p.x + 10, p.y - 5, mYLabelPaint);
        }
    }
}

Example 35 with PointF

use of android.graphics.PointF in project carat by amplab.

the class RadarChart method drawXLabels.

/**
     * Draws the x-labels of the chart.
     */
private void drawXLabels() {
    if (!mDrawXLabels)
        return;
    mXLabelPaint.setTypeface(mXLabels.getTypeface());
    mXLabelPaint.setTextSize(mXLabels.getTextSize());
    mXLabelPaint.setColor(mXLabels.getTextColor());
    float sliceangle = getSliceAngle();
    // calculate the factor that is needed for transforming the value to
    // pixels
    float factor = getFactor();
    PointF c = getCenterOffsets();
    for (int i = 0; i < mData.getXValCount(); i++) {
        String text = mData.getXVals().get(i);
        float angle = (sliceangle * i + mRotationAngle) % 360f;
        PointF p = getPosition(c, mYChartMax * factor + mXLabels.mLabelWidth / 2f, angle);
        mDrawCanvas.drawText(text, p.x, p.y + mXLabels.mLabelHeight / 2f, mXLabelPaint);
    }
}