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package com.github.mikephil.charting.formatter;
import com.github.mikephil.charting.data.BarEntry;
import java.text.DecimalFormat;
/**
* Created by Philipp Jahoda on 28/01/16.
* <p/>
* A formatter specifically for stacked BarChart that allows to specify whether the all stack values
* or just the top value should be drawn.
*/
public class StackedValueFormatter extends ValueFormatter
{
/**
* if true, all stack values of the stacked bar entry are drawn, else only top
*/
private boolean mDrawWholeStack;
/**
* a string that should be appended behind the value
*/
private String mSuffix;
private DecimalFormat mFormat;
/**
* Constructor.
*
* @param drawWholeStack if true, all stack values of the stacked bar entry are drawn, else only top
* @param suffix a string that should be appended behind the value
* @param decimals the number of decimal digits to use
*/
public StackedValueFormatter(boolean drawWholeStack, String suffix, int decimals) {
this.mDrawWholeStack = drawWholeStack;
this.mSuffix = suffix;
StringBuffer b = new StringBuffer();
for (int i = 0; i < decimals; i++) {
if (i == 0)
b.append(".");
b.append("0");
}
this.mFormat = new DecimalFormat("###,###,###,##0" + b.toString());
}
@Override
public String getBarStackedLabel(float value, BarEntry entry) {
if (!mDrawWholeStack) {
float[] vals = entry.getYVals();
if (vals != null) {
// find out if we are on top of the stack
if (vals[vals.length - 1] == value) {
// return the "sum" across all stack values
return mFormat.format(entry.getY()) + mSuffix;
} else {
return ""; // return empty
}
}
}
// return the "proposed" value
return mFormat.format(value) + mSuffix;
}
}
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