vault backup: 2024-10-12 17:19:45

03-UnrealEngine/Gameplay/UObject/UnrealSpecifiers/Meta/Asset/ForceShowEngineContent/ForceShowEngineContent.md

@@ -0,0 +1,59 @@
+# ForceShowEngineContent
+
+- **功能描述：** 指定UObject*属性的资源可选列表里强制可选引擎的内建资源
+- **使用位置：** UPROPERTY
+- **引擎模块：** Asset Property
+- **元数据类型：** bool
+- **限制类型：** UObject*
+- **关联项：** [ForceShowPluginContent](ForceShowPluginContent.md)
+- **常用程度：** ★★
+
+指定UObject*属性的资源可选列表里强制可选引擎的内建资源。
+
+## 测试代码：
+
+```cpp
+UCLASS(Blueprintable, BlueprintType)
+class INSIDER_API UMyProperty_ShowContent :public UDataAsset
+{
+public:
+	GENERATED_BODY()
+public:
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Object)
+	TObjectPtr<UObject> MyAsset_Default;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Object, meta = (ForceShowEngineContent))
+	TObjectPtr<UObject> MyAsset_ForceShowEngineContent;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Object, meta = (ForceShowPluginContent))
+	TObjectPtr<UObject> MyAsset_ForceShowPluginContent;
+};
+```
+
+## 测试结果：
+
+可见MyAsset_Default默认是只包含本项目的资源。
+
+MyAsset_ForceShowEngineContent的作用其实就是在选项卡里勾选ShowEngineContent，因此结果上会发现多了非常多的可选资源。
+
+MyAsset_ForceShowPluginContent的作用同样是在选项卡里勾选ShowPluginContent，可以选择别的插件里的资源。
+
+![Untitled](Untitled.png)
+
+## 原理：
+
+在属性的资源选择器里会尝试寻找ForceShowEngineContent和ForceShowPluginContent，然后设置到AssetPickerConfig里，从而改变资源的可选类型。
+
+```cpp
+void SPropertyMenuAssetPicker::Construct( const FArguments& InArgs )
+{
+		const bool bForceShowEngineContent = PropertyHandle ? PropertyHandle->HasMetaData(TEXT("ForceShowEngineContent")) : false;
+		const bool bForceShowPluginContent = PropertyHandle ? PropertyHandle->HasMetaData(TEXT("ForceShowPluginContent")) : false;
+		
+		FAssetPickerConfig AssetPickerConfig;
+		// Force show engine content if meta data says so
+		AssetPickerConfig.bForceShowEngineContent = bForceShowEngineContent;
+		// Force show plugin content if meta data says so
+		AssetPickerConfig.bForceShowPluginContent = bForceShowPluginContent;
+}
+```

03-UnrealEngine/Gameplay/UObject/UnrealSpecifiers/Meta/Asset/ForceShowEngineContent/ForceShowPluginContent.md

@@ -0,0 +1,8 @@
+# ForceShowPluginContent
+
+- **功能描述：** 指定UObject*属性的资源可选列表里强制可选其他插件里的内建资源
+- **使用位置：** UPROPERTY
+- **引擎模块：** Asset Property
+- **元数据类型：** bool
+- **限制类型：** UObject*
+- **关联项：** [ForceShowEngineContent](ForceShowEngineContent.md)