74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "IDetailCustomization.h"
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#include "Blueprint/UserWidget.h"
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class IDetailCategoryBuilder;
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class IPropertyHandle;
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/** Base helper for customizations on widget classes that dynamically generate entries of a given widget class */
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class FDynamicEntryWidgetDetailsBase : public IDetailCustomization
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{
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protected:
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template <typename WidgetT>
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void AddEntryClassPicker(WidgetT& WidgetInstance, IDetailCategoryBuilder& CategoryBuilder, TSharedRef<IPropertyHandle> InEntryClassHandle)
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{
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static const FName EntryInterfaceMetaKey = TEXT("EntryInterface");
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static const FName EntryClassMetaKey = TEXT("EntryClass");
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EntryClassHandle = InEntryClassHandle;
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const UClass* RequiredInterface = nullptr;
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const UClass* BaseClass = nullptr;
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if (UUserWidget* OwningUserWidget = WidgetInstance.template GetTypedOuter<UUserWidget>())
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{
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// Find the native BindWidget FProperty that corresponds to this table view
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for (TFieldIterator<FObjectProperty> PropertyIter(OwningUserWidget->GetClass()); PropertyIter; ++PropertyIter)
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{
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FObjectProperty* Property = *PropertyIter;
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if (Property->PropertyClass && Property->PropertyClass->IsChildOf<WidgetT>())
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{
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WidgetT** WidgetPropertyInstance = Property->ContainerPtrToValuePtr<WidgetT*>(OwningUserWidget);
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if (*WidgetPropertyInstance == &WidgetInstance)
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{
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BaseClass = Property->GetClassMetaData(EntryClassMetaKey);
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RequiredInterface = Property->GetClassMetaData(EntryInterfaceMetaKey);
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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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// If the property binding didn't exist or didn't specify a class/interface, check with the class itself (including parents as needed)
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const UClass* WidgetClass = WidgetInstance.GetClass();
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while (WidgetClass && WidgetClass->IsChildOf<UWidget>() && (!BaseClass || !RequiredInterface))
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{
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if (!BaseClass)
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{
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BaseClass = WidgetClass->GetClassMetaData(EntryClassMetaKey);
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}
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if (!RequiredInterface)
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{
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RequiredInterface = WidgetClass->GetClassMetaData(EntryInterfaceMetaKey);
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}
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WidgetClass = WidgetClass->GetSuperClass();
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}
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// If a valid base class has been specified, create a custom class picker that filters accordingly
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if (BaseClass || RequiredInterface)
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{
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AddEntryClassPickerInternal(BaseClass, RequiredInterface, CategoryBuilder);
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}
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}
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private:
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void AddEntryClassPickerInternal(const UClass* EntryBaseClass, const UClass* RequiredEntryInterface, IDetailCategoryBuilder& CategoryBuilder) const;
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const UClass* GetSelectedEntryClass() const;
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void HandleNewEntryClassSelected(const UClass* NewEntryClass) const;
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TSharedPtr<IPropertyHandle> EntryClassHandle;
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}; |