Draw Image (png) on Chart

[mrlogik]

Hello,

I'm trying to load an image from file and display it on the chart; a company logo.

Using the example NinjaJess posted here, I am getting an exception "Unsupported Pixel Format." I have connected with the debugger and changed to the PixedFormat that RenderTarget is using, but the same exception persists.

Any light you may be able to shed would be helpful.

Thank you

[NinjaTrader_Jim]

Hello mrlogik,

Thanks for opening the thread.

I recently made some changes to the example Jesse posted to dispose of any resources needed to create the bitmap on RenderTarget changes and on the indicator's termination.

Attached is an updated example. If you are still able to encounter issues with this script, could you provide us some steps we could take to reproduce on our end?

We are happy to look into this further as needed.

EDIT: Additional changes have been made so best practices are reflected. Resources are no longer disposed in State.Terminated, but disposed in OnRenderTargetChange when RenderTarget is null. (RenderTarget will be null at the end of the scripts life which will dispose resources, but not recreate them.)

[mrlogik]

Works perfectly, thank you Jim

[ninjo]

Thank you Jim.

How can I test if the file exists?

In NT7 all is very easy with Drawing and Drawing2D namespaces, but in NT8 are limited !? why?

I cant use the simple code: if (File.Exists(@"C:\Users\Public\signal_short.wav") ...

[NinjaTrader_Jim]

Hello ninjo,

File.Exists would be included with System.IO. You will need to add a using statement to use System.IO with your script. An example that uses System.IO with NT8 can be found below.

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

Let us know if you have any questions.

[MazaMaza]

Hello Jim,

i tried using your draw bitmap example in a code I built for a client and NT crashes if the indicator isn't set to OnBarUpdate as the calls to get the picture are too frequent.
Is there a way to cache the bitmap in memory and just retrieve it without getting the Direct X error?

[NinjaTrader_Jim]

Hello MazaMaza,

Thanks for your post.

The example disposes and recreates in OnRenderTargetChange and draws in OnRender. It stays in memory until it the RenderTarget changes and we need to update the bitmap.

If you need to update the bitmap in OnBarUpdate, I would recommend setting some class level variables and a bool for "NeedsUpdate" Then on the next OnRender, you could check the bool and call a method that does the regular disposing and recreating that is done in OnRenderTargetChange to load the new bitmap.

I'm not exactly sure of the full scope of your issue without seeing an example. If you would like to modify the script so it is showing what you are doing, I could give further insight.

I look forward to assisting.