Java IDataSet类代码示例

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * Sets a new data object for the chart. The data object contains all values
 * and information needed for displaying.
 *
 * @param data
 */
public void setData(T data) {

    mData = data;
    mOffsetsCalculated = false;

    if (data == null) {
        return;
    }

    // calculate how many digits are needed
    setupDefaultFormatter(data.getYMin(), data.getYMax());

    for (IDataSet set : mData.getDataSets()) {
        if (set.needsFormatter() || set.getValueFormatter() == mDefaultValueFormatter)
            set.setValueFormatter(mDefaultValueFormatter);
    }

    // let the chart know there is new data
    notifyDataSetChanged();

    if (mLogEnabled)
        Log.i(LOG_TAG, "Data is set.");
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * Adds an Entry to the DataSet at the specified index.
 * Entries are added to the end of the list.
 *
 * @param e
 * @param dataSetIndex
 */
public void addEntry(Entry e, int dataSetIndex) {

    if (mDataSets.size() > dataSetIndex && dataSetIndex >= 0) {

        IDataSet set = mDataSets.get(dataSetIndex);
        // add the entry to the dataset
        if (!set.addEntry(e))
            return;

        calcMinMax(e, set.getAxisDependency());

    } else {
        Log.e("addEntry", "Cannot add Entry because dataSetIndex too high or too low.");
    }
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * Removes the given Entry object from the DataSet at the specified index.
 *
 * @param e
 * @param dataSetIndex
 */
public boolean removeEntry(Entry e, int dataSetIndex) {

    // entry null, outofbounds
    if (e == null || dataSetIndex >= mDataSets.size())
        return false;

    IDataSet set = mDataSets.get(dataSetIndex);

    if (set != null) {
        // remove the entry from the dataset
        boolean removed = set.removeEntry(e);

        if (removed) {
            calcMinMax();
        }

        return removed;
    } else
        return false;
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * Removes the given Entry object from the DataSet at the specified index.
 *
 * @param e
 * @param dataSetIndex
 */
public boolean removeEntry(Entry e, int dataSetIndex) {

    // entry null, outofbounds
    if (e == null || dataSetIndex >= mDataSets.size())
        return false;

    IDataSet set = mDataSets.get(dataSetIndex);

    if (set != null) {
        // remove the entry from the dataset
        boolean removed = set.removeEntry(e);

        if (removed) {
            mYValCount -= 1;

            calcMinMax(0, mYValCount);
        }

        return removed;
    } else
        return false;
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
@Override
protected SelectionDetail getSelectionDetail(int xIndex, float y, int dataSetIndex) {

	dataSetIndex = Math.max(dataSetIndex, 0);

	BarData barData = mChart.getBarData();
	IDataSet dataSet = barData.getDataSetCount() > dataSetIndex
			? barData.getDataSetByIndex(dataSetIndex)
			: null;
	if (dataSet == null)
		return null;

	final float yValue = dataSet.getYValForXIndex(xIndex);

	if (yValue == Double.NaN) return null;

	return new SelectionDetail(
			yValue,
			dataSetIndex,
			dataSet);
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
@Override
void dataSetConfig(IDataSet<BarEntry> dataSet, ReadableMap config) {
    BarDataSet barDataSet = (BarDataSet) dataSet;

    ChartDataSetConfigUtils.commonConfig(barDataSet, config);
    ChartDataSetConfigUtils.commonBarLineScatterCandleBubbleConfig(barDataSet, config);

    if (BridgeUtils.validate(config, ReadableType.Number, "barSpacePercent")) {
        barDataSet.setBarSpacePercent((float) config.getDouble("barSpacePercent"));
    }
    if (BridgeUtils.validate(config, ReadableType.String, "barShadowColor")) {
        barDataSet.setBarShadowColor(Color.parseColor(config.getString("barShadowColor")));
    }
    if (BridgeUtils.validate(config, ReadableType.Number, "highlightAlpha")) {
        barDataSet.setHighLightAlpha(config.getInt("highlightAlpha"));
    }
    if (BridgeUtils.validate(config, ReadableType.Array, "stackLabels")) {
        barDataSet.setStackLabels(BridgeUtils.convertToStringArray(config.getArray("stackLabels")));
    }
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * draws all MarkerViews on the highlighted positions
 */
protected void drawMarkers(Canvas canvas) {

    // if there is no marker view or drawing marker is disabled
    if (mMarker == null || !isDrawMarkersEnabled() || !valuesToHighlight())
        return;

    for (int i = 0; i < mIndicesToHighlight.length; i++) {

        Highlight highlight = mIndicesToHighlight[i];

        IDataSet set = mData.getDataSetByIndex(highlight.getDataSetIndex());

        Entry e = mData.getEntryForHighlight(mIndicesToHighlight[i]);
        int entryIndex = set.getEntryIndex(e);

        // make sure entry not null
        if (e == null || entryIndex > set.getEntryCount() * mAnimator.getPhaseX())
            continue;

        float[] pos = getMarkerPosition(highlight);

        // check bounds
        if (!mViewPortHandler.isInBounds(pos[0], pos[1]))
            continue;

        // callbacks to update the content
        mMarker.refreshContent(e, highlight);

        // draw the marker
        mMarker.draw(canvas, pos[0], pos[1]);
    }
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * Sets a custom IValueFormatter for all DataSets this data object contains.
 *
 * @param f
 */
public void setValueFormatter(IValueFormatter f) {
    if (f == null)
        return;
    else {
        for (IDataSet set : mDataSets) {
            set.setValueFormatter(f);
        }
    }
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * Returns true if highlighting of all underlying values is enabled, false
 * if not.
 *
 * @return
 */
public boolean isHighlightEnabled() {
    for (IDataSet set : mDataSets) {
        if (!set.isHighlightEnabled())
            return false;
    }
    return true;
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * An array of `Highlight` objects corresponding to the selected xValue and dataSetIndex.
 *
 * @param set
 * @param dataSetIndex
 * @param xVal
 * @param rounding
 * @return
 */
protected List<Highlight> buildHighlights(IDataSet set, int dataSetIndex, float xVal, DataSet.Rounding rounding) {

    ArrayList<Highlight> highlights = new ArrayList<>();

    //noinspection unchecked
    List<Entry> entries = set.getEntriesForXValue(xVal);
    if (entries.size() == 0) {
        // Try to find closest x-value and take all entries for that x-value
        final Entry closest = set.getEntryForXValue(xVal, Float.NaN, rounding);
        if (closest != null)
        {
            //noinspection unchecked
            entries = set.getEntriesForXValue(closest.getX());
        }
    }

    if (entries.size() == 0)
        return highlights;

    for (Entry e : entries) {
        MPPointD pixels = mChart.getTransformer(
                set.getAxisDependency()).getPixelForValues(e.getX(), e.getY());

        highlights.add(new Highlight(
                e.getX(), e.getY(),
                (float) pixels.x, (float) pixels.y,
                dataSetIndex, set.getAxisDependency()));
    }

    return highlights;
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
@Override
protected List<Highlight> buildHighlights(IDataSet set, int dataSetIndex, float xVal, DataSet.Rounding rounding) {

	ArrayList<Highlight> highlights = new ArrayList<>();

	//noinspection unchecked
	List<Entry> entries = set.getEntriesForXValue(xVal);
	if (entries.size() == 0) {
		// Try to find closest x-value and take all entries for that x-value
		final Entry closest = set.getEntryForXValue(xVal, Float.NaN, rounding);
		if (closest != null)
		{
			//noinspection unchecked
			entries = set.getEntriesForXValue(closest.getX());
		}
	}

	if (entries.size() == 0)
		return highlights;

	for (Entry e : entries) {
		MPPointD pixels = mChart.getTransformer(
				set.getAxisDependency()).getPixelForValues(e.getY(), e.getX());

		highlights.add(new Highlight(
				e.getX(), e.getY(),
				(float) pixels.x, (float) pixels.y,
				dataSetIndex, set.getAxisDependency()));
	}

	return highlights;
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * Sets a custom ValueFormatter for all DataSets this data object contains.
 *
 * @param f
 */
public void setValueFormatter(ValueFormatter f) {
    if (f == null)
        return;
    else {
        for (IDataSet set : mDataSets) {
            set.setValueFormatter(f);
        }
    }
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * Sets a new data object for the chart. The data object contains all values
 * and information needed for displaying.
 *
 * @param data
 */
public void setData(T data) {

    if (data == null) {
        Log.e(LOG_TAG,
                "Cannot set data for chart. Provided data object is null.");
        return;
    }

    // LET THE CHART KNOW THERE IS DATA
    mOffsetsCalculated = false;
    mData = data;

    // calculate how many digits are needed
    calculateFormatter(data.getYMin(), data.getYMax());

    for (IDataSet set : mData.getDataSets()) {
        if (Utils.needsDefaultFormatter(set.getValueFormatter()))
            set.setValueFormatter(mDefaultFormatter);
    }

    // let the chart know there is new data
    notifyDataSetChanged();

    if (mLogEnabled)
        Log.i(LOG_TAG, "Data is set.");
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
public SelectionDetail(float y, float value, int dataIndex, int dataSetIndex, IDataSet set) {
    this.y = y;
    this.value = value;
    this.dataIndex = dataIndex;
    this.dataSetIndex = dataSetIndex;
    this.dataSet = set;
}
 

import com.github.mikephil.charting.interfaces.datasets.IDataSet; //导入依赖的package包/类
/**
 * 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;
}