Why are some exceptions that can be thrown by the library internal?

[Ghostbird]

I run into this with the PopupNotFoundException. I try to close a popup, but with the new Popup I have no more reference to the popup, so I'm partially flying blind. It might be that the popup has already closed, and I should catch (PopupNotFoundException) { //Ignore }.

[bijington]

The library throws this when it can't find the popup to close. So it could mean it has already closed, that being said I don't think should be something you should be handling through catching the exception.

Are you able to provide some context as to when this is happening? Are you closing from a different window?

Also what do you mean you no longer have access to the Popup? You should still be able to create and show a Popup directly

[Ghostbird]

Hmm… I already suspected that I don't understand the new Popup mechanism at all. I'm using the basic example as guideline.

[Ghostbird]

I've found that theoretically I could show a Popup instance and assign it to a variable. However there I run into a similar issue. Calling CloseAsync() on the popup will throw a PopupNotFoundException if it's already closed. I guess I'll really need to track the popup state myself carefully.

[bijington]

To confirm is the popup being closed multiple times? Either programmatically or via the user actions somehow? That doesn't sound like ideal behaviour

[Ghostbird]

I need to cover scenarios such as:

• A pop-up is shown
• The user taps the close button in the pop-up, but at the same time the page below the pop-up navigates away (e.g. due to a timer). Both fire the pop-up clean-up code. There I call Popup.CloseAsync(), but in the second clean-up the pop-up is already closed.

[Ghostbird]

Anyway, I now have a much better understanding of the Popup. Thanks for that. I've reworked my pop-up usage and it's more robust now.

Although I still catch and swallow an InvalidOperationException when I call Popup.CloseAsync(). I managed to make it much more specific, so there's no real other reason why that exception can be thrown there.