Add-On-Dev: adding new keyboard entry/handled problem

[hiikila]

Hi.

There is another problem with my add-on developement. I added a new QuantityUpDown-Element into an the default entry page. If I try to use the keyboard to change the value, nothing happens - instead the symbol selector gets triggered and shows up.

How can I prevent the dialog to appear with inserted QuantityUpDown-elements?

The two additional elements:




When I press any key, e.g. the number 1 inside of the QuantityUpDown-element, the instrument-selector screen is shown:




This means, the key is not handled by the control, instead the instrument selector picks it up.
The other entry fields in the default entry window do not have this behavior. So which flag do I need to set to allow the processing of keys with the inserted elelemt?

Best,
Carsten

[NinjaTrader_ChrisL]

Hi hiikila, thanks for posting.

You need to attach the PreviewKeyDown event in the script to process the input. There is an example of this for a TextBox here:

https://ninjatrader.com/support/forum/forum/historical-beta-archive/version-8-beta/77882-disabling-keydown-event-in-chart#post685973

Change the type to NinjaTrader.Gui.Tools.QuantityUpDown instead e.g.

using System.Windows.Input;

public void TextBox_PreviewKeyDown(object sender, KeyEventArgs e)
{
NinjaTrader.Gui.Tools.QuantityUpDown textBoxSender = (NinjaTrader.Gui.Tools.QuantityUpDown) sender;
textBoxSender.Value = (int)e.Key;
// handle the keydown event for the text box
e.Handled = true;
}

It must be noted that there are a few things left unhandled here, like the input will not take more than 1 number, the Delete key is not being handled, text input is not being ignored, and so on. All of the input needs to be handled in a custom way using PrievewKeyDown.

Kind regards,
-ChrisL