buildLegendItems method
Builds the legend item.
Implementation
@override
List<LegendItem>? buildLegendItems(int index) {
final num sumOfY = circularYValues
.reduce((num value, num element) => value + element.abs());
const double pointStartAngle = -90;
final List<LegendItem> legendItems = <LegendItem>[];
final int segmentsCount = segments.length;
for (int i = 0; i < dataCount; i++) {
double degree = circularYValues[i] / (maximumValue ?? sumOfY);
degree = (degree > 1 ? 1 : degree) * fullAngle;
final double pointEndAngle = pointStartAngle + degree;
final ChartLegendItem legendItem = ChartLegendItem(
text: circularXValues[i].toString(),
iconType: toLegendShapeMarkerType(legendIconType, this),
iconColor: effectiveColor(i),
shader: _legendIconShaders(i),
series: this,
seriesIndex: index,
pointIndex: i,
startAngle: pointStartAngle,
endAngle: pointEndAngle,
degree: degree,
iconBorderColor: trackColor,
iconBorderWidth: legendIconBorderWidth(),
imageProvider: legendIconType == LegendIconType.image
? parent?.legend?.image
: null,
isToggled: i < segmentsCount && !segmentAt(i).isVisible,
onTap: handleLegendItemTapped,
onRender: _handleLegendItemCreated,
);
legendItems.add(legendItem);
}
return legendItems;
}