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Creating an instanced object to call UFUNCTIONs
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| void UFunctionCallerObject::Update() | |
| { | |
| if (CanUpdate() && IsValid(Function) && GetOuter()) | |
| { | |
| GetOuter()->ProcessEvent(Function, nullptr); | |
| } | |
| } | |
| #if WITH_EDITOR | |
| void UFunctionCallerObject::PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) | |
| { | |
| UObject::PostEditChangeProperty(PropertyChangedEvent); | |
| if (PropertyChangedEvent.GetPropertyName() == GET_MEMBER_NAME_CHECKED(UFunctionCallerObject, FunctionNameToCall)) | |
| { | |
| Function = GetOuter() && GetOuter()->GetClass() ? GetOuter()->GetClass()->FindFunctionByName(FunctionNameToCall) : nullptr; | |
| } | |
| } | |
| #endif | |
| TArray<FName> UFunctionCallerObject::GetFunctionToCallOptions() const | |
| { | |
| if (GetOuter() && GetOuter()->GetClass()) | |
| { | |
| const UObject* Outer = GetOuter(); | |
| // helper lambda to remove invalid functions with specified flags. | |
| auto RemoveInvalidFuncs = [&](TArray<FName> InFunctionList) | |
| { | |
| for (int32 i = 0; i < InFunctionList.Num(); ++i) | |
| { | |
| const FName FuncName = InFunctionList[i]; | |
| const UFunction* Func = Outer->FindFunctionChecked(FuncName); | |
| if (Func) | |
| { | |
| const bool bValid = !Func->HasAnyFunctionFlags(FUNC_BlueprintPure | FUNC_Delegate | FUNC_EditorOnly | |
| | FUNC_UbergraphFunction | FUNC_Delegate | FUNC_HasOutParms); | |
| if (bValid && Func->GetReturnProperty() != nullptr) | |
| { | |
| InFunctionList.RemoveAt(i); | |
| } | |
| } | |
| } | |
| }; | |
| TArray<FName> FunctionList; | |
| Outer->GetClass()->GenerateFunctionList(FunctionList); | |
| RemoveInvalidFuncs(FunctionList); | |
| bool bReachedFinalClass = false; | |
| const UClass* LastSuperClass = Outer->GetClass()->GetSuperClass(); | |
| while (!bReachedFinalClass) | |
| { | |
| if (LastSuperClass && LastSuperClass != AActor::StaticClass()) | |
| { | |
| TArray<FName> SuperFunctionList; | |
| LastSuperClass->GenerateFunctionList(SuperFunctionList); | |
| RemoveInvalidFuncs(SuperFunctionList); | |
| FunctionList.Append(SuperFunctionList); | |
| LastSuperClass = LastSuperClass->GetSuperClass(); | |
| } | |
| else | |
| { | |
| bReachedFinalClass = true; | |
| } | |
| } | |
| return FunctionList; | |
| } | |
| return TArray<FName>{}; | |
| } |
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| UCLASS(EditInlineNew, BlueprintType, NotBlueprintable) | |
| class UFunctionCallerObject final : public UObject | |
| { | |
| GENERATED_BODY() | |
| public: | |
| void Update(); | |
| protected: | |
| bool CanUpdate() | |
| { | |
| // write your own logic here | |
| return true; | |
| } | |
| #if WITH_EDITOR | |
| virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override; | |
| #endif | |
| private: | |
| UPROPERTY(EditAnywhere, Category="Data", DisplayName="Function" ,meta=(GetOptions="GetFunctionToCallOptions")) | |
| FName FunctionNameToCall; | |
| UPROPERTY() | |
| UFunction* Function; | |
| UFUNCTION(CallInEditor) | |
| TArray<FName> GetFunctionToCallOptions() const; | |
| }; |
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