Example usage for org.jfree.chart.renderer.xy XYItemRenderer findRangeBounds

Introduction

In this page you can find the example usage for org.jfree.chart.renderer.xy XYItemRenderer findRangeBounds.

Prototype

public Range findRangeBounds(XYDataset dataset);

Source Link

Document

Returns the lower and upper bounds (range) of the y-values in the specified dataset.

Usage

From source file:ucar.unidata.idv.control.chart.MyXYPlot.java

/**
 * Returns the range for the specified axis.
 *
 * @param axis  the axis.//from w w w  .  jav  a2  s.  c om
 *
 * @return The range.
 */
public Range getDataRange(ValueAxis axis) {

    Range result = null;
    List mappedDatasets = new ArrayList();
    boolean isDomainAxis = true;

    // is it a domain axis?
    int domainIndex = getDomainAxisIndex(axis);
    if (domainIndex >= 0) {
        isDomainAxis = true;
        mappedDatasets.addAll(getDatasetsMappedToDomainAxis(new Integer(domainIndex)));
    }

    // or is it a range axis?
    int rangeIndex = getRangeAxisIndex(axis);
    if (rangeIndex >= 0) {
        isDomainAxis = false;
        mappedDatasets.addAll(getDatasetsMappedToRangeAxis(new Integer(rangeIndex)));
    }

    // iterate through the datasets that map to the axis and get the union
    // of the ranges.
    Iterator iterator = mappedDatasets.iterator();
    while (iterator.hasNext()) {
        XYDataset d = (XYDataset) iterator.next();
        if (d != null) {
            XYItemRenderer r = getRendererForDataset(d);
            if (isDomainAxis) {
                if (r != null) {
                    result = Range.combine(result, r.findDomainBounds(d));
                } else {
                    result = Range.combine(result, DatasetUtilities.findDomainBounds(d));
                }
            } else {
                if (r != null) {
                    result = Range.combine(result, r.findRangeBounds(d));
                } else {
                    result = Range.combine(result, DatasetUtilities.findRangeBounds(d));
                }
            }
        }
    }
    return result;

}

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