/**
* Draws the LimitLines associated with this axis to the screen.
*
* @param c
*/
@Override
public void renderLimitLines(Canvas c) {
List<LimitLine> limitLines = mXAxis.getLimitLines();
if (limitLines == null || limitLines.size() <= 0) return;
float[] pts = new float[4];
Path limitLinePath = new Path();
for (int i = 0; i < limitLines.size(); i++) {
LimitLine l = limitLines.get(i);
pts[0] = l.getLimit();
pts[2] = l.getLimit();
mTrans.pointValuesToPixel(pts);
pts[1] = mViewPortHandler.contentTop();
pts[3] = mViewPortHandler.contentBottom();
limitLinePath.moveTo(pts[0], pts[1]);
limitLinePath.lineTo(pts[2], pts[3]);
mLimitLinePaint.setStyle(Paint.Style.STROKE);
mLimitLinePaint.setColor(l.getLineColor());
mLimitLinePaint.setStrokeWidth(l.getLineWidth());
mLimitLinePaint.setPathEffect(l.getDashPathEffect());
c.drawPath(limitLinePath, mLimitLinePaint);
limitLinePath.reset();
String label = l.getLabel();
// if drawing the limit-value label is enabled
if (label != null && !label.equals("")) {
float xOffset = l.getLineWidth();
float add = Utils.convertDpToPixel(4f);
mLimitLinePaint.setStyle(l.getTextStyle());
mLimitLinePaint.setPathEffect(null);
mLimitLinePaint.setColor(l.getTextColor());
mLimitLinePaint.setStrokeWidth(0.5f);
mLimitLinePaint.setTextSize(l.getTextSize());
float yOffset = Utils.calcTextHeight(mLimitLinePaint, label) + add / 2f;
if (l.getLabelPosition() == LimitLine.LimitLabelPosition.POS_RIGHT) {
c.drawText(
label, pts[0] + xOffset, mViewPortHandler.contentBottom() - add, mLimitLinePaint);
} else {
c.drawText(
label, pts[0] + xOffset, mViewPortHandler.contentTop() + yOffset, mLimitLinePaint);
}
}
}
}
@Override
protected void onDraw(Canvas canvas) {
// super.onDraw(canvas);
if (mData == null) {
boolean hasText = !TextUtils.isEmpty(mNoDataText);
boolean hasDescription = !TextUtils.isEmpty(mNoDataTextDescription);
float line1height = hasText ? Utils.calcTextHeight(mInfoPaint, mNoDataText) : 0.f;
float line2height =
hasDescription ? Utils.calcTextHeight(mInfoPaint, mNoDataTextDescription) : 0.f;
float lineSpacing =
(hasText && hasDescription) ? (mInfoPaint.getFontSpacing() - line1height) : 0.f;
// if no data, inform the user
float y = (getHeight() - (line1height + lineSpacing + line2height)) / 2.f + line1height;
if (hasText) {
canvas.drawText(mNoDataText, getWidth() / 2, y, mInfoPaint);
if (hasDescription) {
y = y + line1height + lineSpacing;
}
}
if (hasDescription) {
canvas.drawText(mNoDataTextDescription, getWidth() / 2, y, mInfoPaint);
}
return;
}
if (!mOffsetsCalculated) {
calculateOffsets();
mOffsetsCalculated = true;
}
}
/**
* returns the maximum height in pixels across all legend labels
*
* @param p the paint object used for rendering the text
* @return
*/
public float getMaximumEntryHeight(Paint p) {
float max = 0f;
for (int i = 0; i < mLabels.length; i++) {
if (mLabels[i] != null) {
float length = (float) Utils.calcTextHeight(p, mLabels[i]);
if (length > max) max = length;
}
}
return max;
}
public void computeAxis(float xValAverageLength, List<String> xValues) {
mAxisLabelPaint.setTypeface(mXAxis.getTypeface());
mAxisLabelPaint.setTextSize(mXAxis.getTextSize());
StringBuffer a = new StringBuffer();
int max = (int) Math.round(xValAverageLength + mXAxis.getSpaceBetweenLabels());
for (int i = 0; i < max; i++) {
a.append("h");
}
mXAxis.mLabelWidth = Utils.calcTextWidth(mAxisLabelPaint, a.toString());
mXAxis.mLabelHeight = Utils.calcTextHeight(mAxisLabelPaint, "Q");
mXAxis.setValues(xValues);
}
@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 phaseX = mAnimator.getPhaseX();
float phaseY = mAnimator.getPhaseY();
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<IPieDataSet> dataSets = data.getDataSets();
float yValueSum = data.getYValueSum();
boolean drawXVals = mChart.isDrawSliceTextEnabled();
float angle;
int xIndex = 0;
for (int i = 0; i < dataSets.size(); i++) {
IPieDataSet 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);
int entryCount = dataSet.getEntryCount();
for (int j = 0, maxEntry = Math.min((int) Math.ceil(entryCount * phaseX), entryCount);
j < maxEntry;
j++) {
Entry entry = dataSet.getEntryForIndex(j);
if (xIndex == 0) angle = 0.f;
else angle = absoluteAngles[xIndex - 1] * phaseX;
final float sliceAngle = drawAngles[xIndex];
final float sliceSpace = dataSet.getSliceSpace();
// offset needed to center the drawn text in the slice
final float offset = (sliceAngle - sliceSpace / 2.f) / 2.f;
angle = angle + offset;
// calculate the text position
float x = (float) (r * Math.cos(Math.toRadians(rotationAngle + angle)) + center.x);
float y = (float) (r * Math.sin(Math.toRadians(rotationAngle + angle)) + center.y);
float value =
mChart.isUsePercentValuesEnabled() ? entry.getVal() / yValueSum * 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) {
if (j < data.getXValCount())
c.drawText(data.getXVals().get(j), x, y + lineHeight / 2f, mValuePaint);
} else if (drawYVals) {
drawValue(c, formatter, value, entry, 0, x, y + lineHeight / 2f);
}
xIndex++;
}
}
}
@Override
public void drawValues(Canvas c) {
BubbleData bubbleData = mChart.getBubbleData();
if (bubbleData == null) return;
// if values are drawn
if (bubbleData.getYValCount()
< (int) (Math.ceil((float) (mChart.getMaxVisibleCount()) * mViewPortHandler.getScaleX()))) {
final List<IBubbleDataSet> dataSets = bubbleData.getDataSets();
float lineHeight = Utils.calcTextHeight(mValuePaint, "1");
for (int i = 0; i < dataSets.size(); i++) {
IBubbleDataSet dataSet = dataSets.get(i);
if (!dataSet.isDrawValuesEnabled() || dataSet.getEntryCount() == 0) continue;
// apply the text-styling defined by the DataSet
applyValueTextStyle(dataSet);
final float phaseX = mAnimator.getPhaseX();
final float phaseY = mAnimator.getPhaseY();
BubbleEntry entryFrom = dataSet.getEntryForXIndex(mMinX);
BubbleEntry entryTo = dataSet.getEntryForXIndex(mMaxX);
int minx = dataSet.getEntryIndex(entryFrom);
int maxx = Math.min(dataSet.getEntryIndex(entryTo) + 1, dataSet.getEntryCount());
final float[] positions =
mChart
.getTransformer(dataSet.getAxisDependency())
.generateTransformedValuesBubble(dataSet, phaseX, phaseY, minx, maxx);
for (int j = 0; j < positions.length; j += 2) {
final float alpha = phaseX == 1 ? phaseY : phaseX;
int valueTextColor = dataSet.getValueTextColor(j / 2);
valueTextColor =
Color.argb(
Math.round(255.f * alpha),
Color.red(valueTextColor),
Color.green(valueTextColor),
Color.blue(valueTextColor));
float x = positions[j];
float y = positions[j + 1];
if (!mViewPortHandler.isInBoundsRight(x)) break;
if ((!mViewPortHandler.isInBoundsLeft(x) || !mViewPortHandler.isInBoundsY(y))) continue;
BubbleEntry entry = dataSet.getEntryForIndex(j / 2 + minx);
drawValue(
c,
dataSet.getValueFormatter(),
entry.getSize(),
entry,
i,
x,
y + (0.5f * lineHeight),
valueTextColor);
}
}
}
}