Authoring COM components

[DatGuy1]

I'm wondering if there's a python-winsdk alternative for https://learn.microsoft.com/windows/uwp/cpp-and-winrt-apis/author-coclasses ?

[dlech]

It is technically possible to write COM components in Python, but it would require some effort to implement the framework to do so and those components couldn't be used in non-Python apps (at least not without also bolting on a Python runtime).

[DatGuy1]

Perhaps out of scope, but I've been trying my hand at implementing NotificationActivationCallback.h through various methods. Trying to implement it using comtypes/pywin32 stumps me due to it being created with winrt::make<winrt::implements<_, INotificationActivationCallback>>() and trying to use WinRT is confusing me with the C++ bindings, and I haven't had much luck with adding the header with cppwinrt.

[dlech]

If I'm remembering correctly that is used in conjunction with https://learn.microsoft.com/en-us/windows/apps/design/shell/tiles-and-notifications/toast-desktop-apps.

I think it would be useful to add a special helper to this library specifically for that class.

Perhaps we could adapt the code from https://learn.microsoft.com/en-us/windows/apps/design/shell/tiles-and-notifications/send-local-toast-desktop-cpp-wrl and write a Python wrapper for it.

[DatGuy1]

That is indeed my use case for it. Doing a major revamp of my toasts module that uses your winsdk bindings, and activating notifications from the action center is the only TODO item remaining.

The other apps section is basically a barebones version of the WRL one, which is what I'm going off. I've managed to recreate the activator class with comtypes:

class NOTIFICATION_USER_INPUT_DATA(Structure):
    _fields_ = [("Key", LPCWSTR), ("Value", LPCWSTR)]


class INotificationActivationCallback(IUnknown):
    _iid_ = GUID("{53E31837-6600-4A81-9395-75CFFE746F94}")
    _methods_ = [
        COMMETHOD(HRESULT, "Activate", (LPCWSTR, LPCWSTR, POINTER(NOTIFICATION_USER_INPUT_DATA), ULONG))
    ]


class CallbackActivator(COMObject):
    _com_interfaces_ = [INotificationActivationCallback]
    _public_methods_ = ["Activate"]

    def Activate(self, *args, **kwargs):
        print(kwargs)
        print(args)

but I haven't managed to actually register and apply it using factories and whatever