Updating Chart trader quantity from custom drawing tool

[xfactscout]

Hi, I'm new to Ninjatrader ecosystem and to C# to be honest (but I have knowledge in PHP, so it was easy to grab the principle fast with a few adjustments).
I was able to create a custom drawing tool that works perfectly fine.
But I wasn't able to find a way (even after reading/searching the forums here) to update dynamically the order quantity in ChartTrader based on the drawing tool calculations.

I don't wan't to send an order and then to update it and I don't want to create a custom strategy.
I just want to prepare the quantity without executing any order.
I guess it should be something that is very simple, but I'm missing something out.

I'm able to get the quantity via:

ChartControl.OwnerChart.ChartTrader.Quantity

And I tried to use the following code from the forums here, but was unsuccessful:

                    
chartControl.Dispatcher.InvokeAsync(((Action) =>

{
NinjaTrader.Gui.Tools.QuantityUpDown quantitySelector = System.Windows.Window.GetWindow(chartControl.Parent).FindFirst("ChartTraderControlQuantitySelector") as NinjaTrader.Gui.Tools.QuantityUpDown;

quantitySelector.Value = quantityAmount;
}));
​

Would really appreciate your help with actual code and where to implement it (In OnRender function or somewhere else).

[NinjaTrader_BrandonH]

Hello xfactscount,

Welcome to the Forums and thanks for your post.

Please see the example attached on the forum thread linked below for capturing ChartTrader controls for use in code.

https://forum.ninjatrader.com/forum/ninjatrader-8/add-on-development/1214798-set-charttrader-order-quantity-via-script?p=1215005#post1215005

If you want to programmatically change a property of this control, you will need to use ChartControl.Dispatcher.InvokeAsync() since the element would reside on the chart's UI thread.

Multi-threading considerations for NinjaScript: https://ninjatrader.com/support/help...ing.htm

[xfactscout]

Thanks Brandon.
Was able to figure it out myself eventually. Just needed a good night sleep I guess lol.
I attached the quantity update function to onMouseUp function within only building or editing state.

[franjcy]

Thanks Brandon.
Was able to figure it out myself eventually. Just needed a good night sleep I guess lol.
I attached the quantity update function to onMouseUp function within only building or editing state.

Hi! I'm trying to do the same, could you share your code please?