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[HELP] Custom Struct Property Editor Add Setter and Listener

I have been struggling with this for a while and would really appreciate some guidance.

The goal is to create a dropdown list/combo box that contains strings that the user can select in the editor. This is to extend details customization.

I have created a custom structure like so.

 struct FTaskComponentData
     TArray<FString>                                                Names;

Then I have created a class to implement the IPropertyTypeCustomization like so: (Header file):

 class FTaskComponentDataCustomization : public IPropertyTypeCustomization
     static TSharedRef<IPropertyTypeCustomization> MakeInstance();
     /** IPropertyTypeCustomization interface */
     virtual void CustomizeHeader(TSharedRef<class IPropertyHandle> StructPropertyHandle, class FDetailWidgetRow& HeaderRow, IPropertyTypeCustomizationUtils& StructCustomizationUtils) override;
     virtual void CustomizeChildren(TSharedRef<class IPropertyHandle> StructPropertyHandle, class IDetailChildrenBuilder& StructBuilder, IPropertyTypeCustomizationUtils& StructCustomizationUtils) override;
     TSharedPtr<IPropertyHandle> UPropertyTaskNameHandle;
     /** Visibility delegate for the various methods of calculating magnitude */
     EVisibility GetPropertyVisibility(UProperty* InProperty) const;

(Source file):

 TSharedRef<IPropertyTypeCustomization> FTaskComponentDataCustomization::MakeInstance()
     return MakeShareable(new FTaskComponentDataCustomization());
 void FTaskComponentDataCustomization::CustomizeHeader(TSharedRef<class IPropertyHandle> StructPropertyHandle, class FDetailWidgetRow& HeaderRow, IPropertyTypeCustomizationUtils& StructCustomizationUtils)
     uint32 NumChildren;
     for (uint32 ChildIndex = 0; ChildIndex < NumChildren; ++ChildIndex)
         const TSharedRef< IPropertyHandle > ChildHandle = StructPropertyHandle->GetChildHandle(ChildIndex).ToSharedRef();
         if (ChildHandle->GetProperty()->GetName() == TEXT("Names"))
             UPropertyTaskNameHandle = ChildHandle;
     static TArray< TSharedPtr<FString>> something;
     something.Add(TSharedPtr<FString>(new FString("One")));
     something.Add(TSharedPtr<FString>(new FString("Two")));
     something.Add(TSharedPtr<FString>(new FString("Three")));
             StructPropertyHandle->CreatePropertyNameWidget(LOCTEXT("Task", "Task Names"), LOCTEXT("IDK","IDK"), false, true, false)
 void FTaskComponentDataCustomization::CustomizeChildren(TSharedRef<class IPropertyHandle> StructPropertyHandle, class IDetailChildrenBuilder& StructBuilder, IPropertyTypeCustomizationUtils& StructCustomizationUtils)
 EVisibility FTaskComponentDataCustomization::GetPropertyVisibility(UProperty* InProperty) const {
     return EVisibility::Visible;

I have then included this custom structure in my component subclass like this:

 UPROPERTY(EditAnywhere, Category = "Planning | Task")
 FTaskComponentData                            TaskData;

I then register with the FPropertyEditorModule like so:

 FPropertyEditorModule& PropertyModule = FModuleManager::LoadModuleChecked<FPropertyEditorModule>("PropertyEditor");
     //Custom properties
     PropertyModule.RegisterCustomPropertyTypeLayout("TaskComponentData", FOnGetPropertyTypeCustomizationInstance::CreateStatic(&FTaskComponentDataCustomization::MakeInstance));

At this point, the desired combo box shows up.. I have 2 questions:

1) How can I set TArray so that I can update the data members with different strings?

2) How do I register the property change listener? Right now, none of the property change listeners are fired from my component when I try to select values from my combobox.

Or where do I got to dig up any of this functionality?

Product Version: UE 4.15
more ▼

asked Jul 31 '17 at 10:35 PM in C++ Programming

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