protected void drawCenterText(Canvas c) {
SpannableString centerText = mChart.getCenterText();
if (mChart.isDrawCenterTextEnabled() && centerText != null) {
PointF center = mChart.getCenterCircleBox();
float innerRadius =
mChart.isDrawHoleEnabled() && mChart.isHoleTransparent()
? mChart.getRadius() * (mChart.getHoleRadius() / 100f)
: mChart.getRadius();
RectF holeRect = mRectBuffer[0];
holeRect.left = center.x - innerRadius;
holeRect.top = center.y - innerRadius;
holeRect.right = center.x + innerRadius;
holeRect.bottom = center.y + innerRadius;
RectF boundingRect = mRectBuffer[1];
boundingRect.set(holeRect);
float radiusPercent = mChart.getCenterTextRadiusPercent();
if (radiusPercent > 0.0) {
boundingRect.inset(
(boundingRect.width() - boundingRect.width() * radiusPercent) / 2.f,
(boundingRect.height() - boundingRect.height() * radiusPercent) / 2.f);
}
if (!centerText.equals(mCenterTextLastValue) || !boundingRect.equals(mCenterTextLastBounds)) {
// Next time we won't recalculate StaticLayout...
mCenterTextLastBounds.set(boundingRect);
mCenterTextLastValue = centerText;
float width = mCenterTextLastBounds.width();
// If width is 0, it will crash. Always have a minimum of 1
mCenterTextLayout =
new StaticLayout(
centerText,
0,
centerText.length(),
mCenterTextPaint,
(int) Math.max(Math.ceil(width), 1.f),
Layout.Alignment.ALIGN_CENTER,
1.f,
0.f,
false);
}
float layoutHeight = mCenterTextLayout.getHeight();
c.save();
c.translate(
boundingRect.left, boundingRect.top + (boundingRect.height() - layoutHeight) / 2.f);
mCenterTextLayout.draw(c);
c.restore();
}
}
