private double GetAxis(IChartItem item, bool x, double axisSize)
{
if (this._axisData == null)
{
return(double.NaN);
}
object obj = ChartHelper.GetChartItemAxisValue(item, x);
if (item == null)
{
return(double.NaN);
}
DateTime?value = ChartHelper.ConvertToDateTime(obj);
if (value == null)
{
return(double.NaN);
}
//计算AxisOrientation.LeftToRight或TopToBottom
double result = axisSize * (value.Value - this._axisData.MinValue).TotalMilliseconds / this._axisData.Area.TotalMilliseconds;
if (base.Orientation == AxisLabelOrientation.RightToLeft ||
base.Orientation == AxisLabelOrientation.BottomToTop)
{
result = axisSize - result;
}
return(result);
}
private DateTimeMinAndMaxValue GetMinAndMaxValue(ChartCollection <ISeries> seriesCollection)
{
if (seriesCollection == null || seriesCollection.Count == 0)
{
return(new DateTimeMinAndMaxValue(null, null));
}
DateTime? min = null, max = null;
IChartAxisValue chartAxisValue;
object obj;
DateTime? time;
foreach (var series in seriesCollection)
{
if (series.AxisX != this && series.AxisY != this ||
series.Values == null ||
series.Values.Count == 0)
{
continue;
}
foreach (var value in series.Values)
{
chartAxisValue = value as IChartAxisValue;
if (chartAxisValue == null)
{
continue;
}
switch (this.AxisType)
{
case AxisType.X:
obj = chartAxisValue.GetXValue();
break;
case AxisType.Y:
obj = chartAxisValue.GetYValue();
break;
default:
throw new NotImplementedException(this.AxisType.ToString());
}
time = ChartHelper.ConvertToDateTime(obj);
if (time == null)
{
continue;
}
if (min == null || time.Value < min.Value)
{
min = time.Value;
}
if (max == null || time.Value > max.Value)
{
max = time.Value;
}
}
}
return(new DateTimeMinAndMaxValue(min, max));
}
