Set Unreal as QtWidget.Parent()

[20tab]

Set Unreal as QtWidget.Parent()

[rdeioris]

@Papoun reopening the issue, as it looks like a new revamp of QT for python is coming and i would like to support it in the best possible way

[rdeioris]

sorry, fixed

[sinokgr]

Any news on this one? 🤔

[rdeioris]

What kind of argument type Qt expects for the window handle ?

[osstony]

We will want the integer for the Unreal HWND.

After that, in python, we will need to create an invisible Qt proxy parent widget which is parented to the Unreal window using win32gui methods. The invisible Qt proxy parent widget will then act as the main window parent for future widgets.

[sinokgr]

@rdeioris have a look at this example, it might be helpful
https://github.com/alfalfasprossen/qtinwin/blob/master/maxparenting.py

[rdeioris]

@sinokgr i have added this:

import unreal_engine as ue

root_window = ue.get_editor_window()
ue.log(root_window.get_window_handle())

i think it should be enough for you

[sinokgr]

worked fine! Thanks! 😀

[sinokgr]

Hi @rdeioris, I just downloaded and re-compiled the latest version with levels support and it looks like this stopped working. Have you accidentally deleted this line of code or is intentional?

[Papoun]

Bumping this one ^^' Not sure if i need to create a new thead ? sorry if that's the case !
How are you setting the UE window as a parent of a QtWidget, @sinokgr ?

I haven't been able to get the unreal window from it's hwnd (using ue.get_editor_window().get_handle() for the hwnd) with Ctypes (PyCObject_AsVoidPtr is deprecated in 3.6 when trying a similar approach to the 3DS Max parenting one) or the win32gui one.

Thanks !

[Papoun]

An update on this. You can get the handle of the ue4 editor window with ctypes like so :
handle = ctypes.windll.user32.GetForegroundWindow()

And use the windll's SetParent to set the Qt widget (self) as a child of the unreal editor window :
ctypes.windll.user32.SetParent(self.winId(), handle)

A few issues arise from this though. You cant for instance move the Qt widget outside of ue4 like a regular unreal window/tab. This can be pretty annoying if the user tries to move the Qt window on another screen or outside of the unreal window geometry.

I ended up resorting to a simpler method where im using a thread to monitor the current foreground application, but would really like to see if the problems above still persist with different methods !

[rdeioris]

Closing it as now we have the set_as_owner() api function:

https://github.com/20tab/UnrealEnginePython/blob/master/README.md#integration-with-qt4qt5pyside2