findPolarCoord method
Implementation
PolarLayout findPolarCoord([int polarIndex = 0]) {
if (polarIndex > config.polarList.length) {
polarIndex = 0;
}
if (config.polarList.isEmpty) {
throw FlutterError('暂无Polar坐标系');
}
return _findCoordInner(config.polarList[polarIndex]) as PolarLayout;
}