public ChartScaleInfo ComputeScaleSelf()
{
int startIndex = this.visibleStartIndex;
int endIndex = this.visibleEndIndex;
if (!dirty && scaleSelf != null && !this.liveScrolling)
{
return(scaleSelf);
}
if (scaleSelf != null && this.liveScrolling)
{
// try and do incremental update of the scale for added efficiency!
startIndex = this.smoothScrollScaleIndex;
}
else
{
scaleSelf = new ChartScaleInfo();
this.smoothScrollScaleIndex = 0;
}
if (series == null)
{
return(scaleSelf);
}
int len = series.Values.Count;
if (startIndex < 0)
{
startIndex = 0;
}
if (endIndex < 0 || endIndex > len)
{
endIndex = len;
}
if (this.ActualHeight == 0)
{
return(scaleSelf);
}
for (int i = startIndex; i < endIndex; i++)
{
DataValue d = series.Values[i];
double x = d.X;
double y = d.Y;
scaleSelf.Add(x, y);
}
this.smoothScrollScaleIndex = endIndex;
return(scaleSelf);
}
public ChartScaleInfo ComputeScaleSelf(int index)
{
if (scaleSelf == null)
{
scaleSelf = new ChartScaleInfo();
}
if (!dirty)
{
return(scaleSelf);
}
if (index > 0)
{
// this is an incremental update then so we pick up where we left off.
}
else
{
// start over
scaleSelf = new ChartScaleInfo();
}
if (series == null)
{
return(scaleSelf);
}
int len = series.Values.Count;
if (index < 0)
{
index = 0;
}
for (int i = index; i < len; i++)
{
DataValue d = series.Values[i];
double x = d.X;
double y = d.Y;
scaleSelf.Add(x, y);
}
scaleIndex = len;
return(scaleSelf);
}