/// <summary>
/// 获得分割段数
/// </summary>
/// <param name="dataZoom"></param>
/// <returns></returns>
public static int GetSplitNumber(Axis axis, float coordinateWid, DataZoom dataZoom)
{
if (axis.type == Axis.AxisType.Value)
{
return(axis.context.labelValueList.Count - 1);
}
else if (axis.type == Axis.AxisType.Time)
{
return(axis.context.labelValueList.Count);
}
else if (axis.type == Axis.AxisType.Log)
{
return(axis.splitNumber > 0 ? axis.splitNumber : 4);
}
else if (axis.type == Axis.AxisType.Category)
{
int dataCount = axis.GetDataList(dataZoom).Count;
if (!axis.boundaryGap)
{
dataCount -= 1;
}
if (dataCount <= 0)
{
dataCount = 1;
}
if (axis.splitNumber <= 0)
{
if (dataCount <= 10)
{
return(dataCount);
}
else
{
for (int i = 4; i < 6; i++)
{
if (dataCount % i == 0)
{
return(i);
}
}
return(5);
}
}
else
{
if (axis.splitNumber <= 0 || axis.splitNumber > dataCount)
{
return(dataCount);
}
if (dataCount >= axis.splitNumber * 2)
{
return(axis.splitNumber);
}
else
{
return(dataCount);
}
}
}
return(0);
}
/// <summary>
/// 获得分割段宽度
/// </summary>
/// <param name="coordinateWidth"></param>
/// <param name="dataZoom"></param>
/// <returns></returns>
public static float GetScaleWidth(Axis axis, float coordinateWidth, int index, DataZoom dataZoom = null)
{
if (index < 0)
{
return(0);
}
int num = GetScaleNumber(axis, coordinateWidth, dataZoom);
int splitNum = GetSplitNumber(axis, coordinateWidth, dataZoom);
if (num <= 0)
{
num = 1;
}
if (axis.IsTime() || axis.IsValue())
{
var value = axis.GetLabelValue(index);
var lastValue = axis.GetLabelValue(index - 1);
return(axis.context.minMaxRange == 0 ?
0 :
(float)(coordinateWidth * (value - lastValue) / axis.context.minMaxRange));
}
else
{
var data = axis.GetDataList(dataZoom);
if (axis.IsCategory() && data.Count > 0)
{
var count = axis.boundaryGap ? data.Count : data.Count - 1;
int tick = count / splitNum;
if (count <= 0)
{
return(0);
}
var each = coordinateWidth / count;
if (axis.insertDataToHead)
{
var max = axis.boundaryGap ? splitNum : splitNum - 1;
if (index == 1)
{
if (axis.axisTick.alignWithLabel)
{
return(each * tick);
}
else
{
return(coordinateWidth - each * tick * max);
}
}
else
{
if (count < splitNum)
{
return(each);
}
else
{
return(each * (count / splitNum));
}
}
}
else
{
var max = axis.boundaryGap ? num - 1 : num;
if (index >= max)
{
if (axis.axisTick.alignWithLabel)
{
return(each * tick);
}
else
{
return(coordinateWidth - each * tick * (index - 1));
}
}
else
{
if (count < splitNum)
{
return(each);
}
else
{
return(each * (count / splitNum));
}
}
}
}
else
{
if (splitNum <= 0)
{
return(0);
}
else
{
return(coordinateWidth / splitNum);
}
}
}
}
/// <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>
public static string GetLabelName(Axis axis, float coordinateWidth, int index, double minValue, double maxValue,
DataZoom dataZoom, bool forcePercent)
{
int split = GetSplitNumber(axis, coordinateWidth, dataZoom);
if (axis.type == Axis.AxisType.Value)
{
if (minValue == 0 && maxValue == 0)
{
maxValue = axis.max != 0 ? axis.max : 1;
}
double value = 0;
if (forcePercent)
{
maxValue = 100;
}
value = axis.GetLabelValue(index);
if (axis.inverse)
{
value = -value;
minValue = -minValue;
maxValue = -maxValue;
}
if (forcePercent)
{
return(string.Format("{0}%", (int)value));
}
else
{
return(axis.axisLabel.GetFormatterContent(index, value, minValue, maxValue));
}
}
else if (axis.type == Axis.AxisType.Log)
{
double value = axis.logBaseE ?
System.Math.Exp(axis.GetLogMinIndex() + index) :
System.Math.Pow(axis.logBase, axis.GetLogMinIndex() + index);
if (axis.inverse)
{
value = -value;
minValue = -minValue;
maxValue = -maxValue;
}
return(axis.axisLabel.GetFormatterContent(index, value, minValue, maxValue, true));
}
else if (axis.type == Axis.AxisType.Time)
{
if (minValue == 0 && maxValue == 0)
{
return(string.Empty);
}
if (index > axis.context.labelValueList.Count - 1)
{
return(string.Empty);
}
var value = axis.GetLabelValue(index);
return(axis.axisLabel.GetFormatterDateTime(index, value, minValue, maxValue));
}
var showData = axis.GetDataList(dataZoom);
int dataCount = showData.Count;
if (dataCount <= 0)
{
return("");
}
int rate = axis.boundaryGap ? (dataCount / split) : (dataCount - 1) / split;
if (rate == 0)
{
rate = 1;
}
if (axis.insertDataToHead)
{
if (index > 0)
{
var residue = (dataCount - 1) - split * rate;
var newIndex = residue + (index - 1) * rate;
if (newIndex < 0)
{
newIndex = 0;
}
return(axis.axisLabel.GetFormatterContent(newIndex, showData[newIndex]));
}
else
{
if (axis.boundaryGap && coordinateWidth / dataCount > 5)
{
return(string.Empty);
}
else
{
return(axis.axisLabel.GetFormatterContent(0, showData[0]));
}
}
}
else
{
int newIndex = index * rate;
if (newIndex < dataCount)
{
return(axis.axisLabel.GetFormatterContent(newIndex, showData[newIndex]));
}
else
{
if (axis.boundaryGap && coordinateWidth / dataCount > 5)
{
return(string.Empty);
}
else
{
return(axis.axisLabel.GetFormatterContent(dataCount - 1, showData[dataCount - 1]));
}
}
}
}
