118 lines
2.4 KiB
C++
118 lines
2.4 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#if UE_ENABLE_INCLUDE_ORDER_DEPRECATED_IN_5_6
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#include "CoreMinimal.h"
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#endif // UE_ENABLE_INCLUDE_ORDER_DEPRECATED_IN_5_6
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#include "Editor.h"
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#include "PropertyHandle.h"
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#define LOCTEXT_NAMESPACE "MassMovementEditor"
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namespace UE::MassMovement::PropertyUtils
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{
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// Expects T is struct.
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template<typename T>
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TOptional<T> GetValue(const TSharedPtr<IPropertyHandle>& ValueProperty)
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{
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if (!ValueProperty)
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{
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return TOptional<T>();
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}
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FStructProperty* StructProperty = CastFieldChecked<FStructProperty>(ValueProperty->GetProperty());
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if (!StructProperty)
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{
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return TOptional<T>();
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}
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if (StructProperty->Struct != TBaseStructure<T>::Get())
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{
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return TOptional<T>();
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}
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T Value = T();
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bool bValueSet = false;
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TArray<void*> RawData;
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ValueProperty->AccessRawData(RawData);
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for (void* Data : RawData)
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{
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if (Data)
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{
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T CurValue = *reinterpret_cast<T*>(Data);
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if (!bValueSet)
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{
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bValueSet = true;
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Value = CurValue;
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}
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else if (CurValue != Value)
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{
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// Multiple values
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return TOptional<T>();
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}
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}
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}
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return TOptional<T>(Value);
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}
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// Expects T is struct.
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template<typename T>
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void SetValue(TSharedPtr<IPropertyHandle>& ValueProperty, T NewValue, EPropertyValueSetFlags::Type Flags = 0)
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{
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if (!ValueProperty)
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{
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return;
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}
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FStructProperty* StructProperty = CastFieldChecked<FStructProperty>(ValueProperty->GetProperty());
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if (!StructProperty)
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{
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return;
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}
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if (StructProperty->Struct != TBaseStructure<T>::Get())
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{
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return;
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}
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const bool bTransactable = (Flags & EPropertyValueSetFlags::NotTransactable) == 0;
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bool bNotifiedPreChange = false;
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TArray<void*> RawData;
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ValueProperty->AccessRawData(RawData);
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for (void* Data : RawData)
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{
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if (Data)
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{
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if (!bNotifiedPreChange)
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{
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if (bTransactable && GEditor)
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{
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GEditor->BeginTransaction(FText::Format(LOCTEXT("SetPropertyValue", "Set {0}"), ValueProperty->GetPropertyDisplayName()));
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}
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ValueProperty->NotifyPreChange();
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bNotifiedPreChange = true;
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}
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T* Value = reinterpret_cast<T*>(Data);
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*Value = NewValue;
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}
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}
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if (bNotifiedPreChange)
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{
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ValueProperty->NotifyPostChange(EPropertyChangeType::ValueSet);
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if (bTransactable && GEditor)
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{
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GEditor->EndTransaction();
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}
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}
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ValueProperty->NotifyFinishedChangingProperties();
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}
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} // UE::MassMovement::PropertyUtils
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#undef LOCTEXT_NAMESPACE
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