How do click events get introduced into the hierarchy in UWP (or Maui in general)? What function puts them in?

[jonmdev]

I am attempting to design my own click management system based on a WindowOverlay:
https://github.com/dotnet/maui/tree/5e77c2a28a278f8e00f31d9692da2543c8086d6e/src/Core/src/WindowOverlay

In Windows, this method just adds a W2DGraphicsView _graphicsView element to the Window's Microsoft.Maui.Platform.WindowRootViewContainer, and when set to _graphicsView.IsHitTestVisible = true it takes the pointer events instead of them passing through to the underlying hierarchy.

In Android, with the equivalent setup, I can selectively pass through clicks caught and managed by the Overlay using View.DispatchTouchEvent() which lets you manually pass through touch events to any specific Android Views.

However, there are no such functions available in Windows, and I have spent at least 8 hours today trying to find a solution for passing clicks events selectively to other objects to activate their natural functions (like TextBoxes) with no luck.

When the WindowOverlay element is set to react to click events, I cannot find any way to make them go through to the underlying layers as well.

Even when the events are set to unhandled the events don't transmit down the hierarchy. This is to be expected perhaps as the _graphicsView in this setup is disconnected from the hierarchy. It is just an overlay sitting on top of the Microsoft.Maui.Platform.WindowRootViewContainer with no children for the events to traverse naturally.

I need some way to invoke the click event into another path of the hierarchy but there are no public means for doing so. I am certain by Reflection there must be some way to do this, as the click events are getting into the system hierarchy somehow in the first place. Whatever function is introducing them is what I would ideally need.

How are the click functions getting into the hierarchy in the first place? It can't be voodoo.

[jonmdev]

Never mind. Upon reading more this is going to be virtually impossible. Better to just monitor the clicks in windows using one of these type methods:

https://stackoverflow.com/questions/1316681/getting-mouse-position-in-c-sharp