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();
}
}
/**
* Adjusts the gradient used for the chart series to set the shader used in the paint. This is
* only done if the line contains two colors and the bounds of the line has changed since it was
* last set.
*
* @param bounds The bounds used to draw the chart
*/
protected void processBoundsChange(final RectF bounds) {
if (mBounds == null || !mBounds.equals(bounds)) {
mBounds = new RectF(bounds);
mBoundsInset = new RectF(bounds);
if (mSeriesItem.getInset() != null) {
mBoundsInset.inset(mSeriesItem.getInset().x, mSeriesItem.getInset().y);
}
applyGradientToPaint();
}
}
/**
* draws the description text in the center of the pie chart makes most sense when center-hole is
* enabled
*/
protected void drawCenterText(Canvas c) {
CharSequence centerText = mChart.getCenterText();
if (mChart.isDrawCenterTextEnabled() && centerText != null) {
PointF center = mChart.getCenterCircleBox();
float innerRadius =
mChart.isDrawHoleEnabled()
? 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() / 100f;
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);
}
// I wish we could make an ellipse clipping path on Android to clip to the hole...
// If we ever find out how, this is the place to add it, based on holeRect
// float layoutWidth = Utils.getStaticLayoutMaxWidth(mCenterTextLayout);
float layoutHeight = mCenterTextLayout.getHeight();
c.save();
c.translate(
boundingRect.left, boundingRect.top + (boundingRect.height() - layoutHeight) / 2.f);
mCenterTextLayout.draw(c);
c.restore();
// }
//
// else {
//
//
// // get all lines from the text
// String[] lines = centerText.toString().split("\n");
//
// float maxlineheight = 0f;
//
// // calc the maximum line height
// for (String line : lines) {
// float curHeight = Utils.calcTextHeight(mCenterTextPaint, line);
// if (curHeight > maxlineheight)
// maxlineheight = curHeight;
// }
//
// float linespacing = maxlineheight * 0.25f;
//
// float totalheight = maxlineheight * lines.length - linespacing *
// (lines.length - 1);
//
// int cnt = lines.length;
//
// float y = center.y;
//
// for (int i = 0; i < lines.length; i++) {
//
// String line = lines[lines.length - i - 1];
//
//
//
// c.drawText(line, center.x, y
// + maxlineheight * cnt - totalheight / 2f,
// mCenterTextPaint);
// cnt--;
// y -= linespacing;
// }
// }
}
}