/// <summary>
/// 获得指定区域缩放的类目数据列表
/// </summary>
/// <param name="dataZoom">区域缩放</param>
/// <returns></returns>
internal List <string> GetDataList(DataZoom dataZoom)
{
if (dataZoom != null && dataZoom.enable && dataZoom.IsContainsAxisIndex(index))
{
UpdateFilterData(dataZoom);
return(filterData);
}
else
{
return(m_Data.Count > 0 ? m_Data : m_RuntimeData);
}
}
/// <summary>
/// 更新dataZoom对应的类目数据列表
/// </summary>
/// <param name="dataZoom"></param>
internal void UpdateFilterData(DataZoom dataZoom)
{
if (dataZoom != null && dataZoom.enable && dataZoom.IsContainsAxisIndex(index))
{
var startIndex = (int)((data.Count - 1) * dataZoom.start / 100);
var endIndex = (int)((data.Count - 1) * dataZoom.end / 100);
if (endIndex < startIndex)
{
endIndex = startIndex;
}
if (startIndex != filterStart || endIndex != filterEnd || dataZoom.minShowNum != filterMinShow || m_NeedUpdateFilterData)
{
filterStart = startIndex;
filterEnd = endIndex;
filterMinShow = dataZoom.minShowNum;
m_NeedUpdateFilterData = false;
var data = GetDataList();
if (data.Count > 0)
{
var count = endIndex == startIndex ? 1 : endIndex - startIndex + 1;
if (count < dataZoom.minShowNum)
{
if (dataZoom.minShowNum > data.Count)
{
count = data.Count;
}
else
{
count = dataZoom.minShowNum;
}
}
if (startIndex + count > data.Count)
{
int start = endIndex - count;
filterData = data.GetRange(start < 0 ? 0 : start, count);
}
else
{
filterData = data.GetRange(startIndex, count);
}
}
else
{
filterData = data;
}
}
else if (endIndex == 0)
{
filterData = emptyFliter;
}
}
}
