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(Paint.Style.FILL);
mTransparentCirclePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mTransparentCirclePaint.setColor(Color.WHITE);
mTransparentCirclePaint.setStyle(Paint.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(Paint.Align.CENTER);
}
@Override
public void calculateOffsets() {
float legendLeft = 0f, legendRight = 0f, legendBottom = 0f, legendTop = 0f;
if (mLegend != null && mLegend.isEnabled()) {
float fullLegendWidth =
Math.min(
mLegend.mNeededWidth,
mViewPortHandler.getChartWidth() * mLegend.getMaxSizePercent())
+ mLegend.getFormSize()
+ mLegend.getFormToTextSpace();
if (mLegend.getPosition() == LegendPosition.RIGHT_OF_CHART_CENTER) {
// this is the space between the legend and the chart
float spacing = Utils.convertDpToPixel(13f);
legendRight = fullLegendWidth + spacing;
} else if (mLegend.getPosition() == LegendPosition.RIGHT_OF_CHART) {
// this is the space between the legend and the chart
float spacing = Utils.convertDpToPixel(8f);
float legendWidth = fullLegendWidth + spacing;
float legendHeight = mLegend.mNeededHeight + mLegend.mTextHeightMax;
PointF c = getCenter();
PointF bottomRight = new PointF(getWidth() - legendWidth + 15, legendHeight + 15);
float distLegend = distanceToCenter(bottomRight.x, bottomRight.y);
PointF reference =
getPosition(c, getRadius(), getAngleForPoint(bottomRight.x, bottomRight.y));
float distReference = distanceToCenter(reference.x, reference.y);
float min = Utils.convertDpToPixel(5f);
if (distLegend < distReference) {
float diff = distReference - distLegend;
legendRight = min + diff;
}
if (bottomRight.y >= c.y && getHeight() - legendWidth > getWidth()) {
legendRight = legendWidth;
}
} else if (mLegend.getPosition() == LegendPosition.LEFT_OF_CHART_CENTER) {
// this is the space between the legend and the chart
float spacing = Utils.convertDpToPixel(13f);
legendLeft = fullLegendWidth + spacing;
} else if (mLegend.getPosition() == LegendPosition.LEFT_OF_CHART) {
// this is the space between the legend and the chart
float spacing = Utils.convertDpToPixel(8f);
float legendWidth = fullLegendWidth + spacing;
float legendHeight = mLegend.mNeededHeight + mLegend.mTextHeightMax;
PointF c = getCenter();
PointF bottomLeft = new PointF(legendWidth - 15, legendHeight + 15);
float distLegend = distanceToCenter(bottomLeft.x, bottomLeft.y);
PointF reference =
getPosition(c, getRadius(), getAngleForPoint(bottomLeft.x, bottomLeft.y));
float distReference = distanceToCenter(reference.x, reference.y);
float min = Utils.convertDpToPixel(5f);
if (distLegend < distReference) {
float diff = distReference - distLegend;
legendLeft = min + diff;
}
if (bottomLeft.y >= c.y && getHeight() - legendWidth > getWidth()) {
legendLeft = legendWidth;
}
} else if (mLegend.getPosition() == LegendPosition.BELOW_CHART_LEFT
|| mLegend.getPosition() == LegendPosition.BELOW_CHART_RIGHT
|| mLegend.getPosition() == LegendPosition.BELOW_CHART_CENTER) {
// It's possible that we do not need this offset anymore as it
// is available through the extraOffsets, but changing it can mean
// changing default visibility for existing apps.
float yOffset = getRequiredLegendOffset();
legendBottom =
Math.min(
mLegend.mNeededHeight + yOffset,
mViewPortHandler.getChartHeight() * mLegend.getMaxSizePercent());
} else if (mLegend.getPosition() == LegendPosition.ABOVE_CHART_LEFT
|| mLegend.getPosition() == LegendPosition.ABOVE_CHART_RIGHT
|| mLegend.getPosition() == LegendPosition.ABOVE_CHART_CENTER) {
// It's possible that we do not need this offset anymore as it
// is available through the extraOffsets, but changing it can mean
// changing default visibility for existing apps.
float yOffset = getRequiredLegendOffset();
legendTop =
Math.min(
mLegend.mNeededHeight + yOffset,
mViewPortHandler.getChartHeight() * mLegend.getMaxSizePercent());
}
legendLeft += getRequiredBaseOffset();
legendRight += getRequiredBaseOffset();
legendTop += getRequiredBaseOffset();
}
float minOffset = Utils.convertDpToPixel(mMinOffset);
if (this instanceof RadarChart) {
XAxis x = ((RadarChart) this).getXAxis();
if (x.isEnabled() && x.isDrawLabelsEnabled()) {
minOffset = Math.max(minOffset, x.mLabelRotatedWidth);
}
}
legendTop += getExtraTopOffset();
legendRight += getExtraRightOffset();
legendBottom += getExtraBottomOffset();
legendLeft += getExtraLeftOffset();
float offsetLeft = Math.max(minOffset, legendLeft);
float offsetTop = Math.max(minOffset, legendTop);
float offsetRight = Math.max(minOffset, legendRight);
float offsetBottom = Math.max(minOffset, Math.max(getRequiredBaseOffset(), legendBottom));
mViewPortHandler.restrainViewPort(offsetLeft, offsetTop, offsetRight, offsetBottom);
if (mLogEnabled)
Log.i(
LOG_TAG,
"offsetLeft: "
+ offsetLeft
+ ", offsetTop: "
+ offsetTop
+ ", offsetRight: "
+ offsetRight
+ ", offsetBottom: "
+ offsetBottom);
}
@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++;
}
}
}
