131 lines
4.8 KiB
C++
131 lines
4.8 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "MaterialAttributePropertyDetails.h"
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#include "Containers/UnrealString.h"
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#include "Delegates/Delegate.h"
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#include "DetailCategoryBuilder.h"
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#include "DetailLayoutBuilder.h"
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#include "DetailWidgetRow.h"
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#include "HAL/PlatformCrt.h"
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#include "IDetailChildrenBuilder.h"
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#include "IDetailPropertyRow.h"
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#include "Internationalization/Text.h"
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#include "MaterialShared.h"
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#include "Materials/MaterialAttributeDefinitionMap.h"
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#include "Materials/MaterialExpressionGetMaterialAttributes.h"
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#include "Materials/MaterialExpressionSetMaterialAttributes.h"
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#include "Misc/AssertionMacros.h"
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#include "Misc/Guid.h"
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#include "PropertyCustomizationHelpers.h"
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#include "PropertyHandle.h"
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#include "Templates/Tuple.h"
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#include "RenderUtils.h"
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class SToolTip;
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TSharedRef<IDetailCustomization> FMaterialAttributePropertyDetails::MakeInstance()
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{
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return MakeShareable(new FMaterialAttributePropertyDetails);
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}
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void FMaterialAttributePropertyDetails::CustomizeDetails(IDetailLayoutBuilder& DetailLayout)
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{
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// Populate combo boxes with material property list
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FMaterialAttributeDefinitionMap::GetAttributeNameToIDList(AttributeNameToIDList);
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static const FString ExcludedFrontMaterialName = FString("FrontMaterial");
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AttributeDisplayNameList.Empty(AttributeNameToIDList.Num());
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for (const TPair<FString, FGuid>& NameGUIDPair : AttributeNameToIDList)
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{
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// We remove unwanted elements from the list of material attributes that can be used in the material layer workflow.
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// We do not want to blend Substrate BSDF which could increase the complexity of the material (BSDF / Slab count) for each blend operation.
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// Only parameters are allowed to finally be transform into Substrate at the end of the chain.
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// This filtering is ran only when constructing the UI element.
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if(Substrate::IsMaterialLayeringSupportEnabled() || NameGUIDPair.Key != ExcludedFrontMaterialName)
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{
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AttributeDisplayNameList.Add(MakeShareable(new FString(NameGUIDPair.Key)));
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}
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}
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// Fetch root property we're dealing with
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TSharedPtr<IPropertyHandle> PropertyGetArray = DetailLayout.GetProperty(GET_MEMBER_NAME_CHECKED(UMaterialExpressionGetMaterialAttributes, AttributeGetTypes));
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TSharedPtr<IPropertyHandle> PropertySetArray = DetailLayout.GetProperty(GET_MEMBER_NAME_CHECKED(UMaterialExpressionSetMaterialAttributes, AttributeSetTypes));
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TSharedPtr<IPropertyHandle> PropertyArray;
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if (PropertyGetArray->IsValidHandle())
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{
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PropertyArray = PropertyGetArray;
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}
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else if (PropertySetArray->IsValidHandle())
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{
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PropertyArray = PropertySetArray;
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}
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check(PropertyArray->IsValidHandle());
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// Add builder for children to handle array changes
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TSharedRef<FDetailArrayBuilder> ArrayChildBuilder = MakeShareable(new FDetailArrayBuilder(PropertyArray.ToSharedRef()));
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ArrayChildBuilder->OnGenerateArrayElementWidget(FOnGenerateArrayElementWidget::CreateSP(this, &FMaterialAttributePropertyDetails::OnBuildChild));
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IDetailCategoryBuilder& AttributesCategory = DetailLayout.EditCategory("MaterialAttributes", FText::GetEmpty(), ECategoryPriority::Important);
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AttributesCategory.AddCustomBuilder(ArrayChildBuilder);
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}
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void FMaterialAttributePropertyDetails::OnBuildChild(TSharedRef<IPropertyHandle> ChildHandle, int32 ElementIndex, IDetailChildrenBuilder& ChildrenBuilder)
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{
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// Add an overridden combo box
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IDetailPropertyRow& PropertyArrayRow = ChildrenBuilder.AddProperty(ChildHandle);
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FPropertyComboBoxArgs ComboArgs(
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ChildHandle,
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FOnGetPropertyComboBoxStrings::CreateLambda([this](TArray<TSharedPtr<FString>>& OutComboBoxStrings, TArray<TSharedPtr<SToolTip>>& OutToolTips, TArray<bool>& OutRestrictedItems) -> void
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{
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OutComboBoxStrings = AttributeDisplayNameList;
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}),
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FOnGetPropertyComboBoxValue::CreateLambda( [this, ChildHandle]() -> FString
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{
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FString AttributeName;
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if (ChildHandle->IsValidHandle())
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{
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// Convert attribute ID string to display name
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FString IDString; FGuid IDValue;
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ChildHandle->GetValueAsFormattedString(IDString);
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FGuid::ParseExact(IDString, EGuidFormats::Digits, IDValue);
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AttributeName = FMaterialAttributeDefinitionMap::GetAttributeName(IDValue);
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}
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return AttributeName;
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}),
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FOnPropertyComboBoxValueSelected::CreateLambda( [this, ChildHandle] (const FString& Selection)
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{
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if (ChildHandle->IsValidHandle())
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{
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// Convert display name to attribute ID
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for (const auto& NameIDPair : AttributeNameToIDList)
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{
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if (NameIDPair.Key == Selection)
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{
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ChildHandle->SetValueFromFormattedString(NameIDPair.Value.ToString(EGuidFormats::Digits));
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break;
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}
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}
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}
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})
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);
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ComboArgs.ShowSearchForItemCount = 1;
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PropertyArrayRow.CustomWidget()
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.NameContent()
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[
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ChildHandle->CreatePropertyNameWidget()
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]
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.ValueContent()
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[
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PropertyCustomizationHelpers::MakePropertyComboBox(ComboArgs)
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];
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}
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