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FastLine v3 TreatNulls Property vs IgnoreNulls old Property
Posted: Mon Jun 25, 2007 5:43 pm
by 9794096
Before we upgraded to v3 of TeeChart, I used FastLine series with the setting of IgnoreNulls = false.
This allowed us to put null points in the series and they ended up displayed as holes in the chart. This was used when filtering our data.
Now with the new v3 of TeeChart there is the TreatNulls property.
How do I get the new FastLine series to behave the same way that the old FastLine did with IgnoreNulls = false?
Using any of the 3 enumerated values for the TreatNulls property, the places in the graph where there should be holes due to the null points that we added now have connecting lines bridging the gap that should have been (and used to be) created by our filtering of the data and inserting nulls.
Any description on how to get the new FastLine with TreatNulls to work the exact same way as the old FastLine with IgnoreNulls = false would be greatly appreciated.
Thanks.
Aaron
Posted: Tue Jun 26, 2007 6:49 am
by Marjan
Hi, Aaron.
Settinng the TreatNulls property to
Code: Select all
Steema.TeeChart.Styles.TreatNullsStyle.DoNotPaint
does what exactly what IgnoreNulls = false; did in old version. When TreatNulls is set to DoNotPaint, then the null points (points with color = Color.Transparent) will be skipped and the chart will have gaps in line. This is demonstrated in new demo. Check the Welcome !\New in Series\FastLine Null points example.
Re:
Posted: Wed Jul 20, 2011 7:42 pm
by 13052841
Marjan wrote:Hi, Aaron.
Settinng the TreatNulls property to
Code: Select all
Steema.TeeChart.Styles.TreatNullsStyle.DoNotPaint
does what exactly what IgnoreNulls = false; did in old version. When TreatNulls is set to DoNotPaint, then the null points (points with color = Color.Transparent) will be skipped and the chart will have gaps in line. This is demonstrated in new demo. Check the Welcome !\New in Series\FastLine Null points example.
Hello, thank you for this response. I have the same problem and was previously using the Skip property. I think the documentation should get updated because I understood that Skip will do the same as DoNotPaint but also ignore calculations. However, Skip still seems to connect the dots.
TeeChart Programmers Guide
Steema.TeeChart.Styles.TreatNullsStyle Enum
Public Members
DoNotPaint - Null points are not painted, but they are still used in other calculations.
Skip - Null points are skipped in drawing and calculations.
Ignore - Null points are completely ignored.
Re: FastLine v3 TreatNulls Property vs IgnoreNulls old Property
Posted: Fri Jul 22, 2011 9:00 am
by 10050769
Hello LibDundas,
I am not sure what are you refer when talk about calculations of property TreatNulls. Please can you explain exactly what you refer when talk about calculations? On the other hand, You inform yout that there are any functions that have a property IncludeNulls that allow included or not nulls to calculate the function. I have made a simple example using average function, for if you can help it:
Code: Select all
public Form1()
{
InitializeComponent();
InitializeChart();
}
Steema.TeeChart.Styles.Points point;
Steema.TeeChart.Styles.Line line1;
Steema.TeeChart.Functions.Average average1;
private void InitializeChart()
{
tChart1.Aspect.View3D = false;
point = new Steema.TeeChart.Styles.Points(tChart1.Chart);
line1 = new Steema.TeeChart.Styles.Line(tChart1.Chart);
average1 = new Steema.TeeChart.Functions.Average();
point.FillSampleValues();
point.SetNull(5);
point.SetNull(3);
point.TreatNulls = Steema.TeeChart.Styles.TreatNullsStyle.DoNotPaint;
line1.Function = average1;
line1.DataSource = point;
line1.Function.Period = 2;
checkBox1.Checked= true;
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
average1.IncludeNulls = checkBox1.Checked;
}
Thanks,
Re: FastLine v3 TreatNulls Property vs IgnoreNulls old Property
Posted: Fri Jul 22, 2011 1:20 pm
by 13052841
Hi, as per the documentation definition for the enum TreatNullsStyle as seen below:
TeeChart Programmers Guide
Steema.TeeChart.Styles.TreatNullsStyle Enum
Public Members
DoNotPaint - Null points are not painted, but they are still used in other calculations.
Skip - Null points are skipped in drawing and calculations.
Ignore - Null points are completely ignored.
Selecting Skip should ignore null points "in drawing and calculations".
Selecting DoNotPaint specifies that null points are "not painted, but still used in calculations".
I am not interested in the calculations part. I found that using Skip still paints a line (connecting the dots from that previous not-null point to the next not-null point).
I just think the document CHM file should be updated to describe the three enumerations values a bit better. Nothing serious here, probably just a language barrier.
Re: FastLine v3 TreatNulls Property vs IgnoreNulls old Property
Posted: Thu Jul 28, 2011 11:31 am
by 10050769
Hello LibDundas,
Sorry for the delay. We are revising your request and we try to give an answer asap.
Thanks,
Re: FastLine v3 TreatNulls Property vs IgnoreNulls old Property
Posted: Thu Jul 28, 2011 2:14 pm
by 13052841
Sandra wrote:Hello LibDundas,
Sorry for the delay. We are revising your request and we try to give an answer asap.
Thanks,
Hi Sandra, please do not handle this request with much priority. My purpose in this forum post was just to share misunderstanding with the documentation. If no one else seems to have this problem, then by all means, keep it the way it is. I just thought it would be helpful for everyone if the documentation explained the TreatNullsStyle Enum property better.
Re: FastLine v3 TreatNulls Property vs IgnoreNulls old Property
Posted: Thu Jul 28, 2011 3:02 pm
by 10050769
Hello LibDundas,
We consider that your are right with observation and we have decided change it, thanks. And also, I inform that we already have fixed the helpfile modification, to next maintenance releases of TeeChart.Net.
Thanks,