@Override
public void drawData(Canvas c) {
int width = (int) mViewPortHandler.getChartWidth();
int height = (int) mViewPortHandler.getChartHeight();
if (mDrawBitmap == null
|| (mDrawBitmap.getWidth() != width)
|| (mDrawBitmap.getHeight() != height)) {
if (width > 0 && height > 0) {
mDrawBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_4444);
mBitmapCanvas = new Canvas(mDrawBitmap);
} else return;
}
mDrawBitmap.eraseColor(Color.TRANSPARENT);
PieData pieData = mChart.getData();
for (PieDataSet set : pieData.getDataSets()) {
if (set.isVisible() && set.getEntryCount() > 0) drawDataSet(c, set);
}
}
/**
* This gives all pie-slices a rounded edge.
*
* @param c
*/
protected void drawRoundedSlices(Canvas c) {
if (!mChart.isDrawRoundedSlicesEnabled()) return;
PieDataSet dataSet = mChart.getData().getDataSet();
if (!dataSet.isVisible()) return;
PointF center = mChart.getCenterCircleBox();
float r = mChart.getRadius();
// calculate the radius of the "slice-circle"
float circleRadius = (r - (r * mChart.getHoleRadius() / 100f)) / 2f;
List<Entry> entries = dataSet.getYVals();
float[] drawAngles = mChart.getDrawAngles();
float angle = mChart.getRotationAngle();
for (int j = 0; j < entries.size(); j++) {
float newangle = drawAngles[j];
Entry e = entries.get(j);
// draw only if the value is greater than zero
if ((Math.abs(e.getVal()) > 0.000001)) {
float x =
(float)
((r - circleRadius)
* Math.cos(Math.toRadians((angle + newangle) * mAnimator.getPhaseY()))
+ center.x);
float y =
(float)
((r - circleRadius)
* Math.sin(Math.toRadians((angle + newangle) * mAnimator.getPhaseY()))
+ center.y);
mRenderPaint.setColor(dataSet.getColor(j));
mBitmapCanvas.drawCircle(x, y, circleRadius, mRenderPaint);
}
angle += newangle * mAnimator.getPhaseX();
}
}