70 lines
2.4 KiB
Markdown
70 lines
2.4 KiB
Markdown
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# HideInDetailPanel
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- **功能描述：** 在Actor的事件面板里隐藏该动态多播委托属性。
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- **使用位置：** UPROPERTY
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- **引擎模块：** DetailsPanel
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- **元数据类型：** bool
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- **限制类型：** Actor里的动态多播委托
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- **常用程度：** ★★
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在Actor的事件面板里隐藏该动态多播委托属性。
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## 测试代码：
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```cpp
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UCLASS(BlueprintType,Blueprintable)
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class INSIDER_API AMyProperty_HideInDetailPanel :public AActor
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{
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GENERATED_BODY()
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public:
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DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnMyHideTestEvent);
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UPROPERTY(BlueprintAssignable, Category = "Event")
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FOnMyHideTestEvent MyEvent;
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UPROPERTY(BlueprintAssignable, Category = "Event", meta = (HideInDetailPanel))
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FOnMyHideTestEvent MyEvent_HideInDetailPanel;
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};
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```
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## 测试效果：
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测试步骤是在蓝图里创建AMyProperty_HideInDetailPanel 的子类，然后观察Event的显示情况。
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可见MyEvent会显示在Class Defautls里的Events，而MyEvent_HideInDetailPanel则没有显示。
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不过MyEvent_HideInDetailPanel依然是可以在蓝图里进行绑定，只不过默认没显示在UI上而已。
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## 原理：
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先判断没有这个标记，然后创建相应的UI控件。
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```cpp
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void FActorDetails::AddEventsCategory(IDetailLayoutBuilder& DetailBuilder)
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{
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IDetailCategoryBuilder& EventsCategory = DetailBuilder.EditCategory("Events", FText::GetEmpty(), ECategoryPriority::Uncommon);
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static const FName HideInDetailPanelName("HideInDetailPanel");
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// Find all the Multicast delegate properties and give a binding button for them
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for (TFieldIterator<FMulticastDelegateProperty> PropertyIt(Actor->GetClass(), EFieldIteratorFlags::IncludeSuper); PropertyIt; ++PropertyIt)
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{
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FMulticastDelegateProperty* Property = *PropertyIt;
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// Only show BP assiangable, non-hidden delegates
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if (!Property->HasAnyPropertyFlags(CPF_Parm) && Property->HasAllPropertyFlags(CPF_BlueprintAssignable) && !Property->HasMetaData(HideInDetailPanelName))
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{}
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}
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}
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void FBlueprintDetails::AddEventsCategory(IDetailLayoutBuilder& DetailBuilder, FName PropertyName, UClass* PropertyClass)
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{
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static const FName HideInDetailPanelName("HideInDetailPanel");
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// Check for multicast delegates that we can safely assign
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if ( !Property->HasAnyPropertyFlags(CPF_Parm) && Property->HasAllPropertyFlags(CPF_BlueprintAssignable) &&
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!Property->HasMetaData(HideInDetailPanelName) )
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}
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```
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