@Override
public ChartView.Element getElementAt(int x, int y) {
ChartView.Element element = new ChartView.Element(0, 0);
ChartEntity chartEntity = getChartEntityAt(x, y);
if (chartEntity instanceof CategoryItemEntity) {
CategoryItemEntity categoryItemEntity = (CategoryItemEntity) chartEntity;
CategoryDataset dataset = categoryItemEntity.getDataset();
String columnKey = (String) categoryItemEntity.getColumnKey();
int columnIndex = dataset.getColumnIndex(columnKey);
String rowKey = (String) categoryItemEntity.getRowKey();
int rowIndex = dataset.getRowIndex(rowKey);
element = new ChartView.Element(rowIndex, columnIndex);
} else if (chartEntity instanceof XYItemEntity) {
XYItemEntity xyItemEntity = (XYItemEntity) chartEntity;
element = new ChartView.Element(xyItemEntity.getSeriesIndex(), xyItemEntity.getItem());
}
return element;
}
/**
* Returns the middle coordinate (in Java2D space) for a series within a category.
*
* @param category the category (<code>null</code> not permitted).
* @param seriesKey the series key (<code>null</code> not permitted).
* @param dataset the dataset (<code>null</code> not permitted).
* @param itemMargin the item margin (0.0 <= itemMargin < 1.0);
* @param area the area (<code>null</code> not permitted).
* @param edge the edge (<code>null</code> not permitted).
* @return The coordinate in Java2D space.
* @since 1.0.7
*/
public double getCategorySeriesMiddle(
Comparable category,
Comparable seriesKey,
CategoryDataset dataset,
double itemMargin,
Rectangle2D area,
RectangleEdge edge) {
int categoryIndex = dataset.getColumnIndex(category);
int categoryCount = dataset.getColumnCount();
int seriesIndex = dataset.getRowIndex(seriesKey);
int seriesCount = dataset.getRowCount();
double start = getCategoryStart(categoryIndex, categoryCount, area, edge);
double end = getCategoryEnd(categoryIndex, categoryCount, area, edge);
double width = end - start;
if (seriesCount == 1) {
return start + width / 2.0;
}
double gap = (width * itemMargin) / (seriesCount - 1);
double ww = (width * (1 - itemMargin)) / seriesCount;
return start + (seriesIndex * (ww + gap)) + ww / 2.0;
}