/// <summary>
/// 获得标签显示的名称
/// </summary>
/// <param name="index"></param>
/// <param name="minValue"></param>
/// <param name="maxValue"></param>
/// <param name="dataZoom"></param>
/// <returns></returns>
internal static string GetLabelName(Axis axis, float coordinateWidth, int index, float minValue, float maxValue,
DataZoom dataZoom, bool forcePercent)
{
int split = GetSplitNumber(axis, coordinateWidth, dataZoom);
if (axis.type == Axis.AxisType.Value)
{
if (minValue == 0 && maxValue == 0)
{
return(string.Empty);
}
var value = 0f;
if (forcePercent)
{
maxValue = 100;
}
if (axis.interval > 0)
{
if (index == split)
{
value = maxValue;
}
else
{
value = minValue + index * axis.interval;
}
}
else
{
value = minValue + (maxValue - minValue) * index / split;
if (!axis.clockwise && value != minValue)
{
value = maxValue - value;
}
}
if (axis.inverse)
{
value = -value;
minValue = -minValue;
maxValue = -maxValue;
}
if (forcePercent)
{
return(string.Format("{0}%", (int)value));
}
else
{
return(axis.axisLabel.GetFormatterContent(value, minValue, maxValue));
}
}
else if (axis.type == Axis.AxisType.Log)
{
float value = axis.logBaseE ? Mathf.Exp(axis.runtimeMinLogIndex + index) :
Mathf.Pow(axis.logBase, axis.runtimeMinLogIndex + index);
if (axis.inverse)
{
value = -value;
minValue = -minValue;
maxValue = -maxValue;
}
return(axis.axisLabel.GetFormatterContent(value, minValue, maxValue, true));
}
else if (axis.type == Axis.AxisType.Time)
{
if (minValue == 0 && maxValue == 0)
{
return(string.Empty);
}
var value = 0f;
if (axis.interval > 0)
{
if (index == split)
{
value = maxValue;
}
else
{
value = minValue + index * axis.interval;
}
}
else
{
value = minValue + (maxValue - minValue) * index / split;
}
var timestamp = (int)value;
var dateTime = DateTimeUtil.GetDateTime(timestamp);
return(axis.axisLabel.GetFormatterDateTime(dateTime));
}
var showData = axis.GetDataList(dataZoom);
int dataCount = showData.Count;
if (dataCount <= 0)
{
return("");
}
int rate = Mathf.RoundToInt(dataCount * 1f / split);
int newIndex = index * rate;
if (newIndex <= dataCount - 1)
{
return(axis.axisLabel.GetFormatterContent(showData[newIndex]));
}
else
{
if (rate == 1)
{
return(string.Empty);
}
else if (axis.boundaryGap && coordinateWidth / dataCount > 10)
{
return(string.Empty);
}
else
{
if ((index - 1) * rate > dataCount - 1)
{
return(string.Empty);
}
else
{
return(axis.axisLabel.GetFormatterContent(showData[dataCount - 1]));
}
}
}
}