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#jira none #review-17748193 #robomerge 5.0 [CL 17882720 by mikko mononen in ue5-main branch]
123 lines
2.9 KiB
C++
123 lines
2.9 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "PropertyEditorModule.h"
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#include "Editor.h"
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struct FGuid;
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struct FSlateBrush;
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#define LOCTEXT_NAMESPACE "StateTreeEditor"
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namespace UE::StateTree::PropertyHelpers {
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/**
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* Gets a struct value from property handle, checks type before access. Expects T is struct.
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* @param ValueProperty Handle to property where value is got from.
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* @return Requested value as optional, in case of multiple values the optional is unset.
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*/
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template<typename T>
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FPropertyAccess::Result GetStructValue(const TSharedPtr<IPropertyHandle>& ValueProperty, T& OutValue)
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{
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if (!ValueProperty)
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{
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return FPropertyAccess::Fail;
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}
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FStructProperty* StructProperty = CastFieldChecked<FStructProperty>(ValueProperty->GetProperty());
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check(StructProperty);
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check(StructProperty->Struct == TBaseStructure<T>::Get());
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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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const 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 FPropertyAccess::MultipleValues;
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}
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}
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}
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OutValue = Value;
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return FPropertyAccess::Success;
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}
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/**
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* Sets a struct property to specific value, checks type before access. Expects T is struct.
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* @param ValueProperty Handle to property where value is got from.
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* @return Requested value as optional, in case of multiple values the optional is unset.
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*/
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template<typename T>
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FPropertyAccess::Result SetStructValue(const TSharedPtr<IPropertyHandle>& ValueProperty, const 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 FPropertyAccess::Fail;
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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 FPropertyAccess::Fail;
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}
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if (StructProperty->Struct != TBaseStructure<T>::Get())
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{
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return FPropertyAccess::Fail;
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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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return FPropertyAccess::Success;
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}
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} // UE::StateTree::PropertyHelpers
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#undef LOCTEXT_NAMESPACE |