How can I track "Side Panels" in Screens?

According to my knowledge it is not possible to see, if side panel is open, unless to use methods, which will not pass certification.

I’d suggest following steps:

1. Add some boolen field at the DAC class, and name it for exampe IsSidePanelOpen.
2. Via js hide it
3. via js track, if sidepanel is open
4. if panel is open, again, via js modify value of that field

In graph read information from that field. 

something like this:

using PX.Data;

public class MyDAC : IBqlTable
{
    // ... other fields

    [PXBool]
    [PXUIField(DisplayName = "Is Side Panel Open", Visible = false)]
    public virtual bool? IsSidePanelOpen { get; set; }
    public abstract class isSidePanelOpen : IBqlField { }
}

and js I’d foresee like this:

$(document).ready(function () {
        // Hide the IsSidePanelOpen field on the page
        $("#IsSidePanelOpen").hide();

        // Track the condition of the "Side Panel"
        if (PX.Web.UI.PXPage.IsCallback) {
            // A "Side Panel" is open
            // Update the value of the IsSidePanelOpen field
            $("#IsSidePanelOpen").val(true);
        }
    });