Brush questions

[aslane]

1. If a user changes an indicator Brush input using a hex string like #8f00ff00 (vs selecting built in brush), does NinjaTrader freeze that brush, or is it the responsibility of the indicator to do the freeze in State.Configure?


2. I have an indicator with a custom OnRender() and uses the builtin BrushSeries (i.e. BackBrushes, ...). If I set the RenderTarget on the series and call GetDxBrush(), does that brush need to be Disposed?

[-=Edge=-]

1. If a user changes an indicator Brush input using a hex string like #8f00ff00 (vs selecting built in brush), does NinjaTrader freeze that brush, or is it the responsibility of the indicator to do the freeze in State.Configure?


2. I have an indicator with a custom OnRender() and uses the builtin BrushSeries (i.e. BackBrushes, ...). If I set the RenderTarget on the series and call GetDxBrush(), does that brush need to be Disposed?

This link might be helpful (working with brushes).. but yes, freeze that brush...

https://ninjatrader.com/support/helpGuides/nt8/en-us/?working_with_brushes.htm

Specifically the section devoted to Understanding Custom Brushes..

I've never used GetDxBrush().. and without seeing your specific code, I'd be guessing..

[aslane]

Thanks, aware of reference. I always freeze brushes I create, just thought this was kind of an edge case. If you have to freeze in this case, then you ALWAYS have to freeze any non-standard brush input because you don't know what the user will do. This is fine, but I have not done so for inputs in the past.

[NinjaTrader_AlanP]

Hello aslane,

Thank you for your note.

You should freeze the brush as this is not done automatically by NinjaTrader. See,

https://ninjatrader.com/support/helpGuides/nt8/en-us/?working_with_brushes.htm#Understandingcustombrushes

Yes, you should dispose of the brush in question 2. Below would be an example of disposing of the dxBrush.

https://ninjatrader.com/support/helpGuides/nt8/en-us/?onrendertargetchanged.htm

Please let us know if you need further assistance.