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03-UnrealEngine/Gameplay/UObject/UnrealSpecifiers/Meta/Object/ThumbnailSize.md

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+# ThumbnailSize
+
+- **功能描述：** 改变缩略图的大小。
+- **使用位置：** UCLASS, UPROPERTY
+- **引擎模块：** Object Property
+- **元数据类型：** bool
+- **关联项：** [DisplayThumbnail](DisplayThumbnail/DisplayThumbnail.md)
+
+改变缩略图的大小。但发现并不会起作用。
+
+## 原理：
+
+```cpp
+void SObjectPropertyEntryBox::Construct( const FArguments& InArgs )
+{
+	// check if the property metadata wants us to display a thumbnail
+const FString& DisplayThumbnailString = PropertyHandle->GetProperty()->GetMetaData(TEXT("DisplayThumbnail"));
+if(DisplayThumbnailString.Len() > 0)
+{
+	bDisplayThumbnail = DisplayThumbnailString == TEXT("true");
+}
+
+// check if the property metadata has an override to the thumbnail size
+const FString& ThumbnailSizeString = PropertyHandle->GetProperty()->GetMetaData(TEXT("ThumbnailSize"));
+if ( ThumbnailSizeString.Len() > 0 )
+{
+	FVector2D ParsedVector;
+	if ( ParsedVector.InitFromString(ThumbnailSizeString) )
+	{
+		ThumbnailSize.X = (int32)ParsedVector.X;
+		ThumbnailSize.Y = (int32)ParsedVector.Y;
+	}
+}
+}
+```