XCharts/Runtime/Helper/DataZoomHelper.cs

/************************************************/
/*                                              */
/*     Copyright (c) 2018 - 2021 monitor1394    */
/*     https://github.com/monitor1394           */
/*                                              */
/************************************************/
using System.Collections.Generic;

namespace XCharts
{
    public static class DataZoomHelper
    {
        public static DataZoom GetDataZoom(Serie serie, List<DataZoom> dataZooms)
        {
            if (serie == null) return null;
            foreach (var dataZoom in dataZooms)
            {
                if (!dataZoom.enable) continue;
                if (dataZoom.IsContainsXAxis(serie.xAxisIndex)
                    || dataZoom.IsContainsYAxis(serie.yAxisIndex))
                {
                    return dataZoom;
                }
            }
            return null;
        }

        public static void UpdateDataZoomRuntimeStartEndValue(DataZoom dataZoom, Serie serie)
        {
            if (dataZoom == null || serie == null) return;
            float min = 0;
            float max = 0;
            SerieHelper.GetMinMaxData(serie, out min, out max, null);
            dataZoom.runtimeStartValue = min + (max - min) * dataZoom.start / 100;
            dataZoom.runtimeEndValue = min + (max - min) * dataZoom.end / 100;
        }

        public static void UpdateDataZoomRuntimeStartEndValue(List<DataZoom> dataZooms, Series series, SerieType serieType)
        {
            foreach (var dataZoom in dataZooms)
            {
                if (!dataZoom.enable) continue;
                float min = float.MaxValue;
                float max = float.MinValue;
                foreach (var serie in series.list)
                {
                    if (!serie.show || serie.type != serieType) continue;
                    if (!dataZoom.IsXAxisIndexValue(serie.xAxisIndex)) continue;
                    var serieMinValue = 0f;
                    var serieMaxValue = 0f;
                    SerieHelper.GetMinMaxData(serie, out serieMinValue, out serieMaxValue, null, 2);
                    if (serieMinValue < min) min = serieMinValue;
                    if (serieMaxValue > max) max = serieMaxValue;
                }
                dataZoom.runtimeStartValue = min + (max - min) * dataZoom.start / 100;
                dataZoom.runtimeEndValue = min + (max - min) * dataZoom.end / 100;
            }
        }
    }
}