Hey all, so I have a blueprint widget that is the child of a C++ UUserWidget-derived class.
I’m trying to make this widget fairly global since I use it in every level (it fades to/from black on level load/exit), so I’m constructing it in my first level’s BP and saving a reference in my GameInstance.
The issue is, if I load a random level first, it won’t have the widget constructed. Thus, why I want to construct the BP from my C++ GameInstance. Just constructing the UUserWidget-derived class wouldn’t be enough, since the BP has animations that I need to use.
I’ve looked around, but the posts I’ve found seem to be slightly different applications. I can reference all of my necessary functions through the UUserWidget-derived class’s BlueprintImplementableEvents, I just need the blueprint widget constructed so that I actually have those events implemented.
I think that what you want is to create your Blueprint UMG widget derived from your C++ base class inside the C++ GameInstance, right?
If that’s what you want then you have multiple options:
The first way (and for me the cleanest):
Using UDeveloperSettings: UDeveloperSettings will auto-register itself with all of its UPROPERTY config variables inside the Project Settings panel. That way you can get those settings from anywhere in your C++ code using the CDO for your settings class.
UCLASS(config = Game, defaultconfig)
class MYGAME_API UMyDevSettings: public UDeveloperSettings
My User Widget Class will appear as a configurable property in your Project Settings panel, in Game category. There you can set your UMG blueprint.
Then to get that blueprint class from your GameInstance use this:
// Include your dev settings header
// Where you want to get the class
TSubclassOf<MyUserWidgetClass> MyWidgetClass = GetDefault<UMyDevSettings>()->MyUserWidgetClass;
// Then you create your widget using that class that you previously set as the blueprint
The second way (simple but not so clean):
In your game instance in C++ add the property for the widget class just like we did in the dev settings class.
Then create a blueprint inheriting from your C++ game instance and set the user widget class in there.
You will have to use your blueprint game instace instead of the C++ one and that way you will be able to access the widget class from your C++ game instance base class.
Please let me know if this is what you are looking for and please mark my answer as correct if it suits your needs.