@Override
public void renderAxisLabels(Canvas c) {
if (!mYAxis.isEnabled() || !mYAxis.isDrawLabelsEnabled()) return;
mAxisLabelPaint.setTypeface(mYAxis.getTypeface());
mAxisLabelPaint.setTextSize(mYAxis.getTextSize());
mAxisLabelPaint.setColor(mYAxis.getTextColor());
PointF center = mChart.getCenterOffsets();
float factor = mChart.getFactor();
int labelCount = mYAxis.mEntryCount;
for (int j = 0; j < labelCount; j++) {
if (j == labelCount - 1 && mYAxis.isDrawTopYLabelEntryEnabled() == false) break;
float r = (mYAxis.mEntries[j] - mYAxis.mAxisMinimum) * factor;
PointF p = Utils.getPosition(center, r, mChart.getRotationAngle());
String label = mYAxis.getFormattedLabel(j);
c.drawText(label, p.x + 10, p.y, mAxisLabelPaint);
}
}
public PieChartRenderer(PieChart chart, ChartAnimator animator, ViewPortHandler viewPortHandler) {
super(animator, viewPortHandler);
mChart = chart;
mHolePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mHolePaint.setColor(Color.WHITE);
mHolePaint.setStyle(Style.FILL);
mTransparentCirclePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mTransparentCirclePaint.setColor(Color.WHITE);
mTransparentCirclePaint.setStyle(Style.FILL);
mTransparentCirclePaint.setAlpha(105);
mCenterTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
mCenterTextPaint.setColor(Color.BLACK);
mCenterTextPaint.setTextSize(Utils.convertDpToPixel(12f));
// mCenterTextPaint.setTextAlign(Align.CENTER);
mValuePaint.setTextSize(Utils.convertDpToPixel(13f));
mValuePaint.setColor(Color.WHITE);
mValuePaint.setTextAlign(Align.CENTER);
}
@Override
public void renderLimitLines(Canvas c) {
List<LimitLine> limitLines = mYAxis.getLimitLines();
if (limitLines == null) return;
float sliceangle = mChart.getSliceAngle();
// calculate the factor that is needed for transforming the value to
// pixels
float factor = mChart.getFactor();
PointF center = mChart.getCenterOffsets();
for (int i = 0; i < limitLines.size(); i++) {
LimitLine l = limitLines.get(i);
if (!l.isEnabled()) continue;
mLimitLinePaint.setColor(l.getLineColor());
mLimitLinePaint.setPathEffect(l.getDashPathEffect());
mLimitLinePaint.setStrokeWidth(l.getLineWidth());
float r = (l.getLimit() - mChart.getYChartMin()) * factor;
Path limitPath = new Path();
for (int j = 0; j < mChart.getData().getXValCount(); j++) {
PointF p = Utils.getPosition(center, r, sliceangle * j + mChart.getRotationAngle());
if (j == 0) limitPath.moveTo(p.x, p.y);
else limitPath.lineTo(p.x, p.y);
}
limitPath.close();
c.drawPath(limitPath, mLimitLinePaint);
}
}
@Override
public void drawValues(Canvas c) {
PointF center = mChart.getCenterCircleBox();
// get whole the radius
float r = mChart.getRadius();
float rotationAngle = mChart.getRotationAngle();
float[] drawAngles = mChart.getDrawAngles();
float[] absoluteAngles = mChart.getAbsoluteAngles();
float off = r / 10f * 3.6f;
if (mChart.isDrawHoleEnabled()) {
off = (r - (r / 100f * mChart.getHoleRadius())) / 2f;
}
r -= off; // offset to keep things inside the chart
PieData data = mChart.getData();
List<PieDataSet> dataSets = data.getDataSets();
boolean drawXVals = mChart.isDrawSliceTextEnabled();
int cnt = 0;
for (int i = 0; i < dataSets.size(); i++) {
PieDataSet dataSet = dataSets.get(i);
if (!dataSet.isDrawValuesEnabled() && !drawXVals) continue;
// apply the text-styling defined by the DataSet
applyValueTextStyle(dataSet);
float lineHeight = Utils.calcTextHeight(mValuePaint, "Q") + Utils.convertDpToPixel(4f);
List<Entry> entries = dataSet.getYVals();
for (int j = 0,
maxEntry =
Math.min((int) Math.ceil(entries.size() * mAnimator.getPhaseX()), entries.size());
j < maxEntry;
j++) {
Entry entry = entries.get(j);
// offset needed to center the drawn text in the slice
float offset = drawAngles[cnt] / 2;
// calculate the text position
float x =
(float)
(r
* Math.cos(
Math.toRadians(
(rotationAngle + absoluteAngles[cnt] - offset)
* mAnimator.getPhaseY()))
+ center.x);
float y =
(float)
(r
* Math.sin(
Math.toRadians(
(rotationAngle + absoluteAngles[cnt] - offset)
* mAnimator.getPhaseY()))
+ center.y);
float value =
mChart.isUsePercentValuesEnabled()
? entry.getVal() / data.getYValueSum() * 100f
: entry.getVal();
ValueFormatter formatter = dataSet.getValueFormatter();
boolean drawYVals = dataSet.isDrawValuesEnabled();
// draw everything, depending on settings
if (drawXVals && drawYVals) {
drawValue(c, formatter, value, entry, 0, x, y);
if (j < data.getXValCount())
c.drawText(data.getXVals().get(j), x, y + lineHeight, mValuePaint);
} else if (drawXVals && !drawYVals) {
if (j < data.getXValCount())
c.drawText(data.getXVals().get(j), x, y + lineHeight / 2f, mValuePaint);
} else if (!drawXVals && drawYVals) {
drawValue(c, formatter, value, entry, 0, x, y + lineHeight / 2f);
}
cnt++;
}
}
}
@Override
protected void computeAxisValues(float min, float max) {
float yMin = min;
float yMax = max;
int labelCount = mYAxis.getLabelCount();
double range = Math.abs(yMax - yMin);
if (labelCount == 0 || range <= 0) {
mYAxis.mEntries = new float[] {};
mYAxis.mEntryCount = 0;
return;
}
double rawInterval = range / labelCount;
double interval = Utils.roundToNextSignificant(rawInterval);
double intervalMagnitude = Math.pow(10, (int) Math.log10(interval));
int intervalSigDigit = (int) (interval / intervalMagnitude);
if (intervalSigDigit > 5) {
// Use one order of magnitude higher, to avoid intervals like 0.9 or
// 90
interval = Math.floor(10 * intervalMagnitude);
}
// force label count
if (mYAxis.isForceLabelsEnabled()) {
float step = (float) range / (float) (labelCount - 1);
mYAxis.mEntryCount = labelCount;
if (mYAxis.mEntries.length < labelCount) {
// Ensure stops contains at least numStops elements.
mYAxis.mEntries = new float[labelCount];
}
float v = min;
for (int i = 0; i < labelCount; i++) {
mYAxis.mEntries[i] = v;
v += step;
}
// no forced count
} else {
// if the labels should only show min and max
if (mYAxis.isShowOnlyMinMaxEnabled()) {
mYAxis.mEntryCount = 2;
mYAxis.mEntries = new float[2];
mYAxis.mEntries[0] = yMin;
mYAxis.mEntries[1] = yMax;
} else {
final double rawCount = yMin / interval;
double first =
rawCount < 0.0 ? Math.floor(rawCount) * interval : Math.ceil(rawCount) * interval;
if (first < yMin && mYAxis.isStartAtZeroEnabled()) {
// Force the first label to be at the 0 (or smallest negative value)
first = yMin;
}
if (first == 0.0) // Fix for IEEE negative zero case (Where value == -0.0, and 0.0 == -0.0)
first = 0.0;
double last = Utils.nextUp(Math.floor(yMax / interval) * interval);
double f;
int i;
int n = 0;
for (f = first; f <= last; f += interval) {
++n;
}
if (Float.isNaN(mYAxis.getAxisMaxValue())) n += 1;
mYAxis.mEntryCount = n;
if (mYAxis.mEntries.length < n) {
// Ensure stops contains at least numStops elements.
mYAxis.mEntries = new float[n];
}
for (f = first, i = 0; i < n; f += interval, ++i) {
mYAxis.mEntries[i] = (float) f;
}
}
}
if (interval < 1) {
mYAxis.mDecimals = (int) Math.ceil(-Math.log10(interval));
} else {
mYAxis.mDecimals = 0;
}
if (!mYAxis.isStartAtZeroEnabled() && mYAxis.mEntries[0] < yMin) {
// If startAtZero is disabled, and the first label is lower that the axis minimum,
// Then adjust the axis minimum
mYAxis.mAxisMinimum = mYAxis.mEntries[0];
}
mYAxis.mAxisMaximum = mYAxis.mEntries[mYAxis.mEntryCount - 1];
mYAxis.mAxisRange = Math.abs(mYAxis.mAxisMaximum - mYAxis.mAxisMinimum);
}
