KSP Dynamic PAW Items

KSPDynamicPAWItem.cs

public class DynamicPAWModule : PartModule
{
    private DynamicPAWToggle mainToggle;
    private DynamicPAWToggle auxToggle;
    private BasePAWGroup group;

    public override void OnStart(StartState state)
    {
        group = new BasePAWGroup(nameof(DynamicPAWModule), "My Dynamic Module", false);
        mainToggle = new DynamicPAWToggle(this, UI_Scene.All, group);
        mainToggle.pawField.guiActive = true;
        mainToggle.pawField.guiActiveEditor = true;
        mainToggle.pawField.guiName = "MyToggle";
        mainToggle.uiControl.enabledText = "on";
        mainToggle.uiControl.disabledText = "off";
        mainToggle.uiControl.onFieldChanged += OnToggleMain;
        mainToggle.uiControl.affectSymCounterparts = UI_Scene.None;
    }

    private void OnToggleMain(BaseField field, object state)
    {
        if (mainToggle.toggleState)
        {
            auxToggle = new DynamicPAWToggle(this, UI_Scene.All, group);
            auxToggle.pawField.guiActive = true;
            auxToggle.pawField.guiActiveEditor = true;
            auxToggle.pawField.guiName = "MyDynamicToggle";
            auxToggle.uiControl.enabledText = "on";
            auxToggle.uiControl.disabledText = "off";
        }
        else
        {
            auxToggle.Destroy();
            auxToggle = null ;
        }
    }
}

public class DynamicPAWToggle
{
    private static readonly FieldInfo fieldInfo = typeof(DynamicPAWToggle).GetField(nameof(toggleState));
    private static readonly UI_Toggle dummyUIControl = new UI_Toggle();

    public bool toggleState;

    private PartModule module;
    private BasePAWGroup pawGroup;
    public BaseField pawField;
    public UI_Toggle uiControl;

    public DynamicPAWToggle(PartModule module, UI_Scene uiScene, BasePAWGroup pawGroup = null)
    {
        this.pawGroup = pawGroup;
        this.module = module;

        uiControl = new UI_Toggle();
        uiControl.scene = uiScene;
        // Propagating to symmetry counterparts doesn't work due to a silly issue in the stock code.
        // I have an unreleased KSPCF patch fixing it (and allowing other stuff like KSPField-like persistance)
        uiControl.affectSymCounterparts = UI_Scene.None; 
        pawField = new BaseField(dummyUIControl, fieldInfo, this);

        if (HighLogic.LoadedSceneIsEditor && (uiScene == UI_Scene.All || uiScene == UI_Scene.Editor))
            pawField.uiControlEditor = uiControl;
        else if (HighLogic.LoadedSceneIsFlight && (uiScene == UI_Scene.All || uiScene == UI_Scene.Flight)) 
            pawField.uiControlFlight = uiControl;

        pawField.group = pawGroup;

        module.Fields.Add(pawField);

        if (module.part.PartActionWindow != null)
            module.part.PartActionWindow.displayDirty = true;
    }

    public void Destroy(bool destroyGroup = false)
    {
        // _fields is private, either use a publicizer or get it with reflection
        module.Fields._fields.Remove(pawField); 

        if (module.part.PartActionWindow != null)
        {
            module.part.PartActionWindow.RemoveFieldControl(pawField, module.part, module);
            if (destroyGroup && pawGroup != null) 
                module.part.PartActionWindow.RemoveGroup(pawGroup.name);
        }
    }
}