OnRender() AGAIN! and other custom functions

[Stanfillirenfro]

Hello!
I have drawn rectangles successfully in a custom function that I call in OnBarUpdate(). I am very limited with this way since I can not draw texts next to my recatngles. OnRender() would be a perfect solution, but before modifying my huge code, I would like to have some help here on how to deal with it.

I have the following:

protected override void OnBarUpdate()
{
     if(NewBar() == true)
    {
         DrawMyRectangles();
    }
}
#region Helpers
void DrawMyRectangles()
{}
#endregion

The function OnRender() is like OnBarUpdate() a "protected override void". How can I call this function in OnBarUpdate(), replacing by this way the fucntion DrawMyRectangles();? Is it possible? If not, could someone please guide me here by pointing out how to fix the problem? I am wondering if I can simply write the code of the function DrawMyRectangles(); directy in OnRender() without having to call it in OnBarUpdate() anymore?

Also, I use to draw texts in OnRender(), but these texts are till now fixed texts. Is there a documentation on how to draw texts in OnRender() base on Time[0] for example? That mean, these texts would be dynamic. What could be the syntax of the function writing the dynamic text in OnRender()?

Many thanks!

[NinjaTrader_Emily]

Hello Stanfillirenfro,

Thank you for your post.

Based on your description, you should run any calculations directly in OnBarUpdate() or use DrawMyRectangles() to run any needed calculations, then use OnRender() to visually render your rectangles. For more details, I suggest reviewing the following resources:

• Using SharpDX for Custom Chart Rendering - https://ninjatrader.com/support/helpGuides/nt8/
  • SharpDX Lines and Shapes (which includes rectangle information) - https://ninjatrader.com/support/help...LinesAndShapes
  • SharpDX Text Rendering - https://ninjatrader.com/support/help...XTextRendering
    • You mentioned how to render text based on Time[0]. I recommend the SharpDX Vectors and Charting Coordinates overview - https://ninjatrader.com/support/help...ingCoordinates
• ChartControl - https://ninjatrader.com/support/help...artcontrol.htm
  • For example, GetXByTime() could be used to get the x-coordinate based on a time. This value could be used when creating the vectors for rendering text
• ChartScale - https://ninjatrader.com/support/help...chartscale.htm
  • GetYByValue() could be used to get a y-coordinate based on a value from the y-axis (price/indicator value)

NinjaTrader comes with the indicator "SampleCustomRender" which you may review for an example of different concepts in OnRender().

Please let us know if we may be of further assistance.

[Stanfillirenfro]

Many thanks NinjaTrader_Emily for your reply and valuable help.

I will revert to you for sure after having a look on the details!

Thanks!