UnrealEngineUWP/Engine/Source/Editor/DetailCustomizations/Private/TextCustomization.cpp

// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.

#include "DetailCustomizationsPrivatePCH.h"
#include "TextCustomization.h"

namespace
{
	class STextPropertyWidget : public SCompoundWidget
	{
		SLATE_BEGIN_ARGS(STextPropertyWidget) {}
		SLATE_END_ARGS()

	public:
		void Construct(const FArguments& Arguments, const TSharedRef<IPropertyHandle>& InPropertyHandle);

	private:
		TSharedPtr<IPropertyHandle> PropertyHandle;
	};

	void STextPropertyWidget::Construct(const FArguments& Arguments, const TSharedRef<IPropertyHandle>& InPropertyHandle)
	{
		PropertyHandle = InPropertyHandle;

		const auto& GetTextValue = [this]() -> FText
		{
			FText TextValue;

			TArray<const void*> RawData;
			PropertyHandle->AccessRawData(RawData);
			if (RawData.Num() == 1)
			{
				const FText* RawDatum = reinterpret_cast<const FText*>(RawData.Top());
				if (RawDatum)
				{
					TextValue = *RawDatum;
				}
			}
			else if(RawData.Num() > 1)
			{
				TextValue = NSLOCTEXT("PropertyEditor", "MultipleValues", "Multiple Values");
			}
			else
			{
				TextValue = FText::GetEmpty();
			}

			return TextValue;
		};

		const auto& OnTextCommitted = [this](const FText& NewText, ETextCommit::Type CommitInfo)
		{
			PropertyHandle->NotifyPreChange();

			TArray<void*> RawData;
			PropertyHandle->AccessRawData(RawData);
			for (void* const RawDatum : RawData)
			{
				FText& PropertyValue = *(reinterpret_cast<FText* const>(RawDatum));

				// FText::FromString on the result of FText::ToString is intentional. For now, we want to nuke any namespace/key info and let it get regenerated from scratch,
				// rather than risk adopting whatever came through some chain of calls. This will be replaced when preserving of identity is implemented.
				PropertyValue = FText::FromString(NewText.ToString());
			}
			
			PropertyHandle->NotifyPostChange();
		};

		ChildSlot
			[
				SNew(SEditableTextBox)
				.Text_Lambda(GetTextValue)
				.OnTextCommitted_Lambda(OnTextCommitted)
			];
	}
}

void FTextCustomization::CustomizeHeader( TSharedRef<class IPropertyHandle> InPropertyHandle, class FDetailWidgetRow& HeaderRow, IPropertyTypeCustomizationUtils& PropertyTypeCustomizationUtils )
{
	HeaderRow.FilterString(InPropertyHandle->GetPropertyDisplayName())
		.NameContent()
		[
			InPropertyHandle->CreatePropertyNameWidget()
		]
		.ValueContent()
		[
			SNew(STextPropertyWidget, InPropertyHandle)
		];
}

void FTextCustomization::CustomizeChildren( TSharedRef<class IPropertyHandle> InPropertyHandle, class IDetailChildrenBuilder& StructBuilder, IPropertyTypeCustomizationUtils& PropertyTypeCustomizationUtils )
{

}