A lead to convert certain code lines from Nt7 into NT8

[giogio1]

These questions are about few lines that I have hard time to convert from Nt7 to Nt8 of inside the OnBarUpdate() block of an indicator. Everything else I've been able to convert.

For all of the following I only need a lead, not a full code, I am aware that even so I am asking a lot.

- For the indicator I think I may need to change the entire data loading which was using the iBar object, I think it is undocumented and obsolete.
I had two lines like:
this.minBar = this.minBars[this.minBars.GetBar(this.firstSessionBegin)];
this.minBarTime = this.minBarTime.AddMinutes((double)this.barPeriod) ;
and I am not able to figure out how to go about these.


Within a function that deals with minutes data loading, I find the following lines in the namespace Indicator:

- base.Enabled = false; (what did it do in an indicator?)

- base.Historical

- if (base.Disposed)

- if (BarsType.GetInstance(base.Bars.Period.Id).IsIntra day)

How should I go about for the four lines above?


I also have the line:
- this.lastBarTime = base.BarsArray[1][x].Time; I can't understand how to correct the error: double does not contain a definition for Time..


- backgr.R (back is a System.Windows.Media.SolidColorBrush object), which equivalent could I use since now I work with brushes?

- I wander why I can't find the documentation of Period, that I find for the following code line:
new Period(BarsPeriodType.Minute, this.barPeriod, base.Bars.Period.MarketDataType)


- Is there and equivalent of
base.ChartControl.Invalidate(true) ?

- and an equivalent of
MyBarDateTime = NinjaTrader.Cbi.Globals.MinDate; it says Globals does not exist in NinjaTrader.Cbi

- I translate the following line
public System.Windows.Media.SolidColorBrush myColor = Brushes.Empty;
into
Brushes myColor = Brushes.Transparent;
is it generally a good translation??


Thank you for all your support. I hope this will be useful for others. I searched a lot in the forum prior writing.
Gio

[NinjaTrader_Jesse]

Hello giogio1,

this.minBar = this.minBars[this.minBars.GetBar(this.firstSessionBegin)];
this.minBarTime = this.minBarTime.AddMinutes((double)this.barPeriod) ;

For these 2 lines you are just using the GetBar method which still exists, you can then add time to a datetime like you are doing.
You could use the bars ago with the Time series to get a time.

https://ninjatrader.com/support/helpGuides/nt8/getbar.htm

- base.Enabled = false; (what did it do in an indicator?)

- base.Historical

- if (base.Disposed)

- if (BarsType.GetInstance(base.Bars.Period.Id).IsIntra day)

Enabled is not documented, I can't provide any suggestion for that.
Historical is now the State .Historical or State enum.
Disposed is not necessary.
You can reference the bars type using Bars.BarsSeries.BarsType

- this.lastBarTime = base.BarsArray[1][x].Time; I can't understand how to correct the error: double does not contain a definition for Time..

You need to use the Time series if you want to access times, the error is saying you are trying to access a property named Time on a double type variable, doubles do not have a Time property.

- backgr.R (back is a System.Windows.Media.SolidColorBrush object), which equivalent could I use since now I work with brushes?

This is your own variable, you would need to convert that variable to a Brush for NT8.

- I wander why I can't find the documentation of Period, that I find for the following code line:

You can find an example of making a BarsPeriod in the tips of the AddDataSeries page.

https://ninjatrader.com/support/helpGuides/nt8/adddataseries.htm

base.ChartControl.Invalidate(true) ?

Invalidate should not be used as it can cause freezing, you can queue a refresh using ForceRefresh.

https://ninjatrader.com/support/helpGuides/nt8/forcerefresh.htm

MyBarDateTime = NinjaTrader.Cbi.Globals.MinDate; it says Globals does not exist in NinjaTrader.Cbi

You can use DateTime.MinValue or DateTime.MaxValue

- I translate the following line
public System.Windows.Media.SolidColorBrush myColor = Brushes.Empty;
into
Brushes myColor = Brushes.Transparent;
is it generally a good translation??

That could be an equivelent, there is no empty brush so using transparent could work.

[giogio1]

Thank you Jesse