Get UEdGraph instance

Development Programming & Scripting Blueprint
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1

hi all,
I want to call UEdGraph::AddPropertyChangedNotifier in my blueprintable actor,
does any one know how to get UEdGraph instance in C++?

Here is code sample that I want to implement:

UEdGraph* GetEditorGraphFromSomeWhere() {
	return nullptr;
}

AMyActor::AMyActor() 
{
	PrimaryActorTick.bCanEverTick = true;

#if WITH_EDITOR
	UEdGraph* pGraph = GetEditorGraphFromSomeWhere();
	if (pGraph) {
		FOnPropertyChanged::FDelegate myDelegate;
		myDelegate.BindUObject(this, &AMyActor::OnPropertyChangedNotifyReceived);
		pGraph->AddPropertyChangedNotifier(myDelegate);
	}
#endif
}

the problem is that I don’t know how to implement GetEditorGraphFromSomeWhere.

2

May I ask why (and where i.e editor only, editor and game, game) you need to listen for changes of properties?

I asked kinda similar question here (and got an answer - the solution I ended up with is at the bottom of my question). Depends on what you exactly want to achieve that might help you.

3

hi,

PostEditChangeProperty and PostEditChangeChainProperty are not working if I declare my blueprint var as local variable. for example:

101060-var1.png

Both var1 and var1_local are my own implement structure, it looks like this:

USTRUCT(BlueprintType)
struct MYLIBRARY_API FMyParameters 
{
	GENERATED_BODY()
	FMyParameters()
		: PaperFlipbook(nullptr){
	};

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Brush, meta = (DisplayThumbnail = "true", DisplayName = "PaperFlipbook", AllowedClasses = "PaperFlipbook"))
		UPaperFlipbook* PaperFlipbook;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "HorizonPlugin|DialogueSystem")
	TArray<FSlateColor> ColorAndOpacity;

	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "HorizonPlugin|DialogueSystem")
		TArray<FVector2D> SourceUV;

	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "HorizonPlugin|DialogueSystem")
		TArray<FVector2D> SourceSize;

};

var1: just working perfectly when I override PostEditChangeProperty or PostEditChangeChainProperty in my actor.

var1_local: when I modify any field, it will pass in EmptyPropertyUpdateStruct that I can’t trace which filed are modified.

void UObject::PostEditChange(void)
{
	FPropertyChangedEvent EmptyPropertyUpdateStruct(NULL);
	this->PostEditChangeProperty(EmptyPropertyUpdateStruct);
}

After trace engine source code, I find out that if i add a AddPropertyChangedNotifier to UEdGraph, I can trace which field are modified for this case.

That why I want to find out how to access UEdGraph instance.

As a workaround, I will forbid my team member to use local variable in blueprint, but I think it is not a proper solution…

4

Did you find how to get the UEdGraph instance, i need it :smiley: