@Override
public void renderGridLines(Canvas c) {
if (!mXAxis.isDrawGridLinesEnabled() || !mXAxis.isEnabled()) return;
float[] position = new float[] {0f, 0f};
mGridPaint.setColor(mXAxis.getGridColor());
mGridPaint.setStrokeWidth(mXAxis.getGridLineWidth());
BarData bd = mChart.getData();
int step = bd.getDataSetCount();
for (int i = mMinX; i < mMaxX; i += mXAxis.mAxisLabelModulus) {
position[0] = i * step + i * bd.getGroupSpace() - 0.5f;
mTrans.pointValuesToPixel(position);
if (mViewPortHandler.isInBoundsX(position[0])) {
c.drawLine(
position[0],
mViewPortHandler.offsetTop(),
position[0],
mViewPortHandler.contentBottom(),
mGridPaint);
}
}
}
/**
* draws the x-labels on the specified y-position
*
* @param pos
*/
@Override
protected void drawLabels(Canvas c, float pos) {
// pre allocate to save performance (dont allocate in loop)
float[] position = new float[] {0f, 0f};
BarData bd = mChart.getData();
int step = bd.getDataSetCount();
for (int i = mMinX; i <= mMaxX; i += mXAxis.mAxisLabelModulus) {
position[0] = i * step + i * bd.getGroupSpace() + bd.getGroupSpace() / 2f;
// consider groups (center label for each group)
if (step > 1) {
position[0] += ((float) step - 1f) / 2f;
}
mTrans.pointValuesToPixel(position);
if (mViewPortHandler.isInBoundsX(position[0]) && i >= 0 && i < mXAxis.getValues().size()) {
String label = mXAxis.getValues().get(i);
int color = mXAxis.getTextColor(i);
mAxisLabelPaint.setColor(color);
if (mXAxis.isAvoidFirstLastClippingEnabled()) {
// avoid clipping of the last
if (i == mXAxis.getValues().size() - 1) {
float width = Utils.calcTextWidth(mAxisLabelPaint, label);
if (width > mViewPortHandler.offsetRight() * 2
&& position[0] + width > mViewPortHandler.getChartWidth()) position[0] -= width / 2;
// avoid clipping of the first
} else if (i == 0) {
float width = Utils.calcTextWidth(mAxisLabelPaint, label);
position[0] += width / 2;
}
}
c.drawText(label, position[0], pos, mAxisLabelPaint);
}
}
}
/**
* Transforms an List of Entry into a float array containing the x and y values transformed with
* all matrices for the BARCHART.
*
* @param entries
* @param dataSet the dataset index
* @return
*/
public float[] generateTransformedValuesHorizontalBarChart(
List<? extends Entry> entries, int dataSet, BarData bd, float phaseY) {
float[] valuePoints = new float[entries.size() * 2];
int setCount = bd.getDataSetCount();
float space = bd.getGroupSpace();
for (int j = 0; j < valuePoints.length; j += 2) {
Entry e = entries.get(j / 2);
// calculate the x-position, depending on datasetcount
float x = e.getXIndex() + (j / 2 * (setCount - 1)) + dataSet + space * (j / 2) + space / 2f;
float y = e.getVal();
valuePoints[j] = y * phaseY;
valuePoints[j + 1] = x;
}
pointValuesToPixel(valuePoints);
return valuePoints;
}