com.github.mikephil.charting.data.ChartData Java Examples

/**
 * Get the Entry for a corresponding highlight object
 *
 * @param highlight
 * @return the entry that is highlighted
 */
public Entry getEntryForHighlight(Highlight highlight) {

    List<BarLineScatterCandleBubbleData> dataObjects = mData.getAllData();

    if (highlight.getDataIndex() >= dataObjects.size())
        return null;

    ChartData data = dataObjects.get(highlight.getDataIndex());

    if (highlight.getDataSetIndex() >= data.getDataSetCount())
        return null;
    else {
        // The value of the highlighted entry could be NaN -
        //   if we are not interested in highlighting a specific value.

        List<Entry> entries = data.getDataSetByIndex(highlight.getDataSetIndex())
                .getEntriesForXValue(highlight.getX());

        return entries.get(0);
    }
}
 

protected ScatterData generateScatterData(int dataSets, float range, int count) {
    
    ArrayList<IScatterDataSet> sets = new ArrayList<IScatterDataSet>();
    
    ScatterShape[] shapes = ScatterChart.getAllPossibleShapes();
    
    for(int i = 0; i < dataSets; i++) {
       
        ArrayList<Entry> entries = new ArrayList<Entry>();
        
        for(int j = 0; j < count; j++) {        
            entries.add(new Entry((float) (Math.random() * range) + range / 4, j));
        }
        
        ScatterDataSet ds = new ScatterDataSet(entries, getLabel(i));
        ds.setScatterShapeSize(12f);
        ds.setScatterShape(shapes[i % shapes.length]);
        ds.setColors(ColorTemplate.COLORFUL_COLORS);
        ds.setScatterShapeSize(9f);
        sets.add(ds);
    }
    
    ScatterData d = new ScatterData(ChartData.generateXVals(0, count), sets);
    d.setValueTypeface(tf);
    return d;
}
 

protected BarData generateBarData(int dataSets, float range, int count) {
        
        ArrayList<IBarDataSet> sets = new ArrayList<IBarDataSet>();
        
        for(int i = 0; i < dataSets; i++) {
           
            ArrayList<BarEntry> entries = new ArrayList<BarEntry>();
            
//            entries = FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "stacked_bars.txt");
            
            for(int j = 0; j < count; j++) {        
                entries.add(new BarEntry((float) (Math.random() * range) + range / 4, j));
            }
            
            BarDataSet ds = new BarDataSet(entries, getLabel(i));
            ds.setColors(ColorTemplate.VORDIPLOM_COLORS);
            sets.add(ds);
        }
        
        BarData d = new BarData(ChartData.generateXVals(0, count), sets);
        d.setValueTypeface(tf);
        return d;
    }
 

/**
 * Get the Entry for a corresponding highlight object
 *
 * @param highlight
 * @return the entry that is highlighted
 */
public Entry getEntryForHighlight(Highlight highlight) {

    List<BarLineScatterCandleBubbleData> dataObjects = mData.getAllData();

    if (highlight.getDataIndex() >= dataObjects.size())
        return null;

    ChartData data = dataObjects.get(highlight.getDataIndex());

    if (highlight.getDataSetIndex() >= data.getDataSetCount())
        return null;
    else {
        // The value of the highlighted entry could be NaN -
        //   if we are not interested in highlighting a specific value.

        List<Entry> entries = data.getDataSetByIndex(highlight.getDataSetIndex())
                .getEntriesForXValue(highlight.getX());

        return entries.get(0);
    }
}
 

@Override
public void drawHighlighted(Canvas c, Highlight[] indices) {

    Chart chart = mChart.get();
    if (chart == null) return;

    for (DataRenderer renderer : mRenderers) {
        ChartData data = null;

        if (renderer instanceof BarChartRenderer)
            data = ((BarChartRenderer)renderer).mChart.getBarData();
        else if (renderer instanceof LineChartRenderer)
            data = ((LineChartRenderer)renderer).mChart.getLineData();
        else if (renderer instanceof CandleStickChartRenderer)
            data = ((CandleStickChartRenderer)renderer).mChart.getCandleData();
        else if (renderer instanceof ScatterChartRenderer)
            data = ((ScatterChartRenderer)renderer).mChart.getScatterData();
        else if (renderer instanceof BubbleChartRenderer)
            data = ((BubbleChartRenderer)renderer).mChart.getBubbleData();

        int dataIndex = data == null ? -1
                : ((CombinedData)chart.getData()).getAllData().indexOf(data);

        mHighlightBuffer.clear();

        for (Highlight h : indices) {
            if (h.getDataIndex() == dataIndex || h.getDataIndex() == -1)
                mHighlightBuffer.add(h);
        }

        renderer.drawHighlighted(c, mHighlightBuffer.toArray(new Highlight[mHighlightBuffer.size()]));
    }
}
 

protected LineData getComplexity() {
    
    ArrayList<ILineDataSet> sets = new ArrayList<ILineDataSet>();
    
    LineDataSet ds1 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "n.txt"), "O(n)");
    LineDataSet ds2 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "nlogn.txt"), "O(nlogn)");
    LineDataSet ds3 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "square.txt"), "O(n\u00B2)");
    LineDataSet ds4 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "three.txt"), "O(n\u00B3)");
    
    ds1.setColor(ColorTemplate.VORDIPLOM_COLORS[0]);
    ds2.setColor(ColorTemplate.VORDIPLOM_COLORS[1]);
    ds3.setColor(ColorTemplate.VORDIPLOM_COLORS[2]);
    ds4.setColor(ColorTemplate.VORDIPLOM_COLORS[3]);
    
    ds1.setCircleColor(ColorTemplate.VORDIPLOM_COLORS[0]);
    ds2.setCircleColor(ColorTemplate.VORDIPLOM_COLORS[1]);
    ds3.setCircleColor(ColorTemplate.VORDIPLOM_COLORS[2]);
    ds4.setCircleColor(ColorTemplate.VORDIPLOM_COLORS[3]);
    
    ds1.setLineWidth(2.5f);
    ds1.setCircleRadius(3f);
    ds2.setLineWidth(2.5f);
    ds2.setCircleRadius(3f);
    ds3.setLineWidth(2.5f);
    ds3.setCircleRadius(3f);
    ds4.setLineWidth(2.5f);
    ds4.setCircleRadius(3f);
    
    
    // load DataSets from textfiles in assets folders
    sets.add(ds1);        
    sets.add(ds2);
    sets.add(ds3);
    sets.add(ds4);
    
    LineData d = new LineData(ChartData.generateXVals(0, ds1.getEntryCount()), sets);
    d.setValueTypeface(tf);
    return d;
}
 

protected LineData generateLineData() {
        
//        DataSet ds1 = new DataSet(n, "O(n)");  
//        DataSet ds2 = new DataSet(nlogn, "O(nlogn)"); 
//        DataSet ds3 = new DataSet(nsquare, "O(n\u00B2)");
//        DataSet ds4 = new DataSet(nthree, "O(n\u00B3)");
        
        ArrayList<ILineDataSet> sets = new ArrayList<ILineDataSet>();
        
        LineDataSet ds1 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "sine.txt"), "Sine function");
        LineDataSet ds2 = new LineDataSet(FileUtils.loadEntriesFromAssets(getActivity().getAssets(), "cosine.txt"), "Cosine function");
        
        ds1.setLineWidth(2f);
        ds2.setLineWidth(2f);
        
        ds1.setDrawCircles(false);
        ds2.setDrawCircles(false);
        
        ds1.setColor(ColorTemplate.VORDIPLOM_COLORS[0]);
        ds2.setColor(ColorTemplate.VORDIPLOM_COLORS[1]);
        
        // load DataSets from textfiles in assets folders
        sets.add(ds1);
        sets.add(ds2);
        
//        sets.add(FileUtils.dataSetFromAssets(getActivity().getAssets(), "n.txt"));
//        sets.add(FileUtils.dataSetFromAssets(getActivity().getAssets(), "nlogn.txt"));
//        sets.add(FileUtils.dataSetFromAssets(getActivity().getAssets(), "square.txt"));
//        sets.add(FileUtils.dataSetFromAssets(getActivity().getAssets(), "three.txt"));
        
        int max = Math.max(sets.get(0).getEntryCount(), sets.get(1).getEntryCount());
        
        LineData d = new LineData(ChartData.generateXVals(0, max),  sets);
        d.setValueTypeface(tf);
        return d;
    }
 

@Override
public void drawHighlighted(Canvas c, Highlight[] indices) {

    Chart chart = mChart.get();
    if (chart == null) return;

    for (DataRenderer renderer : mRenderers) {
        ChartData data = null;

        if (renderer instanceof BarChartRenderer)
            data = ((BarChartRenderer)renderer).mChart.getBarData();
        else if (renderer instanceof LineChartRenderer)
            data = ((LineChartRenderer)renderer).mChart.getLineData();
        else if (renderer instanceof CandleStickChartRenderer)
            data = ((CandleStickChartRenderer)renderer).mChart.getCandleData();
        else if (renderer instanceof ScatterChartRenderer)
            data = ((ScatterChartRenderer)renderer).mChart.getScatterData();
        else if (renderer instanceof BubbleChartRenderer)
            data = ((BubbleChartRenderer)renderer).mChart.getBubbleData();

        int dataIndex = data == null
                ? -1
                : ((CombinedData)chart.getData()).getAllData().indexOf(data);

        ArrayList<Highlight> dataIndices = new ArrayList<>();
        for (Highlight h : indices) {
            if (h.getDataIndex() == dataIndex || h.getDataIndex() == -1)
                dataIndices.add(h);
        }

        renderer.drawHighlighted(c, dataIndices.toArray(new Highlight[dataIndices.size()]));

    }
}
 

/**
 * Returns a list of SelectionDetail object corresponding to the given xIndex.
 *
 * @param xIndex
 * @return
 */
@Override
protected List<SelectionDetail> getSelectionDetailsAtIndex(int xIndex, int dataSetIndex) {

    List<SelectionDetail> vals = new ArrayList<SelectionDetail>();
    float[] pts = new float[2];

    CombinedData data = (CombinedData) mChart.getData();

    // get all chartdata objects
    List<ChartData> dataObjects = data.getAllData();

    for (int i = 0; i < dataObjects.size(); i++) {

        for(int j = 0; j < dataObjects.get(i).getDataSetCount(); j++) {

            IDataSet dataSet = dataObjects.get(i).getDataSetByIndex(j);

            // dont include datasets that cannot be highlighted
            if (!dataSet.isHighlightEnabled())
                continue;

            // extract all y-values from all DataSets at the given x-index
            final float yVals[] = dataSet.getYValsForXIndex(xIndex);
            for (float yVal : yVals) {
                pts[1] = yVal;

                mChart.getTransformer(dataSet.getAxisDependency()).pointValuesToPixel(pts);

                if (!Float.isNaN(pts[1])) {
                    vals.add(new SelectionDetail(pts[1], yVal, i, j, dataSet));
                }
            }
        }
    }

    return vals;
}
 

@Override
public void drawHighlighted(Canvas c, Highlight[] indices) {

    Chart chart = mChart.get();
    if (chart == null) return;

    for (DataRenderer renderer : mRenderers) {
        ChartData data = null;

        if (renderer instanceof BarChartRenderer)
            data = ((BarChartRenderer)renderer).mChart.getBarData();
        else if (renderer instanceof AppLineChartRenderer)
            data = ((AppLineChartRenderer)renderer).mChart.getLineData();
        else if (renderer instanceof CandleStickChartRenderer)
            data = ((CandleStickChartRenderer)renderer).mChart.getCandleData();
        else if (renderer instanceof ScatterChartRenderer)
            data = ((ScatterChartRenderer)renderer).mChart.getScatterData();
        else if (renderer instanceof BubbleChartRenderer)
            data = ((BubbleChartRenderer)renderer).mChart.getBubbleData();

        int dataIndex = data == null ? -1
                : ((CombinedData)chart.getData()).getAllData().indexOf(data);

        mHighlightBuffer.clear();

        for (Highlight h : indices) {
            if (h.getDataIndex() == dataIndex || h.getDataIndex() == -1)
                mHighlightBuffer.add(h);
        }

        renderer.drawHighlighted(c, mHighlightBuffer.toArray(new Highlight[mHighlightBuffer.size()]));
    }
}
 

@Override
public void drawHighlighted(Canvas c, Highlight[] indices) {

    Chart chart = mChart.get();
    if (chart == null) return;

    for (DataRenderer renderer : mRenderers) {
        ChartData data = null;

        if (renderer instanceof BarChartRenderer)
            data = ((BarChartRenderer)renderer).mChart.getBarData();
        else if (renderer instanceof LineChartRenderer)
            data = ((LineChartRenderer)renderer).mChart.getLineData();
        else if (renderer instanceof CandleStickChartRenderer)
            data = ((CandleStickChartRenderer)renderer).mChart.getCandleData();
        else if (renderer instanceof ScatterChartRenderer)
            data = ((ScatterChartRenderer)renderer).mChart.getScatterData();
        else if (renderer instanceof BubbleChartRenderer)
            data = ((BubbleChartRenderer)renderer).mChart.getBubbleData();

        int dataIndex = data == null ? -1
                : ((CombinedData)chart.getData()).getAllData().indexOf(data);

        mHighlightBuffer.clear();

        for (Highlight h : indices) {
            if (h.getDataIndex() == dataIndex || h.getDataIndex() == -1)
                mHighlightBuffer.add(h);
        }

        renderer.drawHighlighted(c, mHighlightBuffer.toArray(new Highlight[mHighlightBuffer.size()]));
    }
}
 

/**
 *
 * Dataset config details: https://github.com/PhilJay/MPAndroidChart/wiki/DataSet-classes-in-detail
 */
@ReactProp(name = "data")
public void setData(Chart chart, ReadableMap propMap) {
    if (!BridgeUtils.validate(propMap, ReadableType.Array, "datasets")) {
        return;
    }

    String[] xValues = new String[0];
    if (BridgeUtils.validate(propMap, ReadableType.Array, "xValues")) {
        xValues = BridgeUtils.convertToStringArray(propMap.getArray("xValues"));
    }

    ChartData<IDataSet<U>> chartData = createData(xValues);

    ReadableArray datasets = propMap.getArray("datasets");
    for (int i = 0; i < datasets.size(); i++) {
        ReadableMap dataset = datasets.getMap(i);

        // TODO validation
        ReadableArray yValues = dataset.getArray("yValues");
        String label = dataset.getString("label");

        ArrayList<U> entries = createEntries(yValues);

        IDataSet<U> lineDataSet = createDataSet(entries, label);

        if (BridgeUtils.validate(dataset, ReadableType.Map, "config")) {
            dataSetConfig(lineDataSet, dataset.getMap("config"));
        }

        chartData.addDataSet(lineDataSet);
    }

    chart.setData(chartData);
    chart.invalidate();
}
 

@Override
public void drawHighlighted(Canvas c, Highlight[] indices) {
    Chart chart = mChart.get();
    if (chart == null) {
        return;
    }

    for (DataRenderer renderer : mRenderers) {
        ChartData data = null;

        if (renderer instanceof BarChartRenderer) {
            data = ((BarChartRenderer) renderer).mChart.getBarData();
        } else if (renderer instanceof LineChartRenderer) {
            data = ((LineChartRenderer) renderer).mChart.getLineData();
        } else if (renderer instanceof CandleStickChartRenderer) {
            data = ((CandleStickChartRenderer) renderer).mChart.getCandleData();
        } else if (renderer instanceof ScatterChartRenderer) {
            data = ((ScatterChartRenderer) renderer).mChart.getScatterData();
        } else if (renderer instanceof BubbleChartRenderer) {
            data = ((BubbleChartRenderer) renderer).mChart.getBubbleData();
        }

        int dataIndex = data == null ? -1
                : ((CombinedData) chart.getData()).getAllData().indexOf(data);

        mHighlightBuffer.clear();

        for (Highlight h : indices) {
            if (h.getDataIndex() == dataIndex || h.getDataIndex() == -1) {
                mHighlightBuffer.add(h);
            }
        }

        renderer.drawHighlighted(c, mHighlightBuffer.toArray(new Highlight[mHighlightBuffer.size()]));
    }
}
 

@Override
ChartData createData(String[] xValues) {
    return new CandleData(xValues);
}
 

@Override
ChartData createData(String[] xValues) {
    return new BarData(xValues);
}
 

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState)
{
    CombinedChart chart = (CombinedChart) view.findViewById(R.id.recording_chart);

    pitchDataSet = new LineDataSet(mListener.startingPitchEntries(), getResources().getString(R.string.progress));
    // generate x value strings
    // [1, 2, 3,... basically random numbers as the recorded pitch is based on processor speed]
    List<String> xVals = ChartData.generateXVals(0, pitchDataSet.getEntryCount());
    chartData = new CombinedData(xVals);

    pitchDataSet.setColor(getResources().getColor(R.color.canvas_dark));
    pitchDataSet.setDrawCircles(false);
    pitchDataSet.setLineWidth(2f);
    pitchDataSet.setDrawValues(false);
    pitchDataSet.setAxisDependency(YAxis.AxisDependency.LEFT);

    pitchData = new LineData(xVals, pitchDataSet);
    chartData.setData(pitchData);

    genderBarData = new BarData(xVals, GraphLayout.getOverallRange(this.getContext(), xVals.size()));
    // Bug with chart lib that throws exception for empty bar charts so must skip adding it on init
    // if were coming from the live pitch graph.
    if (!xVals.isEmpty())
        chartData.setData(genderBarData);

    chart.setData(chartData);

    chart.setDrawValueAboveBar(false);
    chart.setDrawOrder(new CombinedChart.DrawOrder[]{
            CombinedChart.DrawOrder.BAR,
            CombinedChart.DrawOrder.BUBBLE,
            CombinedChart.DrawOrder.CANDLE,
            CombinedChart.DrawOrder.LINE,
            CombinedChart.DrawOrder.SCATTER
    });

    GraphLayout.FormatChart(chart);

    super.onViewCreated(view, savedInstanceState);
}
 

@Override
ChartData createData(String[] xValues) {
    return new BubbleData(xValues);
}
 

@Override
ChartData createData(String[] xValues) {
    return new ScatterData(xValues);
}
 

@Override
ChartData createData(String[] xValues) {
    return new PieData(xValues);
}
 

@Override
ChartData createData(String[] xValues) {
    return new RadarData(xValues);
}
 

public BarChartItem(ChartData<?> cd, Context c) {
    super(cd);

    mTf = Typeface.createFromAsset(c.getAssets(), "OpenSans-Regular.ttf");
}
 

public LineChartItem(ChartData<?> cd, Context c) {
    super(cd);

    mTf = Typeface.createFromAsset(c.getAssets(), "OpenSans-Regular.ttf");
}
 

public PieChartItem(ChartData<?> cd, Context c) {
    super(cd);

    mTf = Typeface.createFromAsset(c.getAssets(), "OpenSans-Regular.ttf");
    mCenterText = generateCenterText();
}
 

public ChartItem(ChartData<?> cd) {
    this.mChartData = cd;      
}
 

@Override
ChartData createData(String[] xValues) {
    return new LineData(xValues);
}
 

public PieChartItem(ChartData<?> cd, Context c) {
    super(cd);

    mCenterText = generateCenterText();
}
 

ChartItem(ChartData<?> cd) {
    this.mChartData = cd;
}
 

public LineChartItem(ChartData<?> cd, Context c) {
    super(cd);
}
 

public BarChartItem(ChartData<?> cd, Context c) {
    super(cd);
}
 

ChartItem(ChartData<?> cd) {
    this.mChartData = cd;
}