Can't add a material picker (SPropertyEditorAsset?) to my Editor plugin, what am I missing?

turfster · October 27, 2015, 1:30am

I’m building an editor plugin that needs to display a listview of FStrings and (assignable) UMaterialInterfaces.

I’ve got the listview and strings, but even after trawling through a ton of engine source code, I haven’t been able to find a single widget class that I can actually use or a simple bit of code that gives me one of the material assignment widgets the editor uses.

http://i.imgur.com/HywzzYg.png

The widget reflector points to SPropertyEditorAsset, but even after including PropertyEditor in my build file’s private include paths, it’s still not showing up as a known class… and I can’t include the .h file for it.

Anyone have any pointers?

Am I barking up the wrong tree?

anonymous_user_c96dc955 · November 18, 2015, 8:28pm

I would love to see an answer to this as well! Can anyone help?

szyszek · November 19, 2015, 2:23pm

if you can #include "PropertyEditorModule.h" in your .cpp file you should be able to use SObjectPropertyEntryBox widget.

t works the same as SPropertyEditorAsset (in fact, it contains one) but wont display the thumbnail unless you specify a property handle and thumbnail pool.

More or less this code should get you on the right track:

SNew(SObjectPropertyEntryBox)
			.OnObjectChanged(this, &SMyWidget::OnMaterialChanged)
			.AllowedClass(UMaterial::StaticClass())

ttvd · November 19, 2015, 6:08pm

I did this manually; Probably the answer above is a better way to do it.

github.com

sideeffects/HoudiniEngineForUnreal/blob/Houdini15.0-Unreal4.10/Source/HoudiniEngineEditor/Private/HoudiniAssetComponentDetails.cpp#L252

      
        
            				AssetThumbnailPool));
            
            
			TSharedPtr<SBorder> StaticMeshThumbnailBorder;
            			TSharedRef<SVerticalBox> VerticalBox = SNew(SVerticalBox);
            			VerticalBox->AddSlot().Padding(0, 2).AutoHeight()
            			[
            				SNew(SHorizontalBox)
            				+SHorizontalBox::Slot()
            				.Padding(0.0f, 0.0f, 2.0f, 0.0f)
            				.AutoWidth()
            				[
            					SAssignNew(StaticMeshThumbnailBorder, SBorder)
            					.Padding(5.0f)
            					.BorderImage(this, &FHoudiniAssetComponentDetails::GetStaticMeshThumbnailBorder, StaticMesh)
            					.OnMouseDoubleClick(this, &FHoudiniAssetComponentDetails::OnThumbnailDoubleClick,
            						(UObject*) StaticMesh)
            					[
            						SNew(SBox)
            						.WidthOverride(64)
            						.HeightOverride(64)
            						.ToolTipText(FText::FromString(StaticMesh->GetPathName()))

anonymous_user_c96dc955 · November 23, 2015, 12:12am

I’ve included the header you mention, but it still shows up as undeclared identifier.

According to the docs, SObjectPropertyEntryBox is in Editor/PropertyEditor/Public/PropertyCustomizationHelpers.h, but including that gives me errors in editor\propertyeditor\public\SResetToDefaultMenu.h

(For the record, I’m trying to make a static mesh selector, but it looks like that’s just a minor change).

anonymous_user_c96dc955 · November 23, 2015, 12:20am

I see that your PCH includes PropertyCustomizationHelpers.h. I get errors in SResetToDefaultMenu.h(15). Do you know if you had any problems with that as well?

anonymous_user_c96dc955 · November 23, 2015, 12:28am

Nevermind, sorted it. Thought to check your plugin.build.cs and discovered I needed to add PropertyEditor as a dependency. That thing confuses me, but thanks for the help!

anonymous_user_c96dc955 · November 23, 2015, 12:28am

Nevermind, sorted that out with my .cs file.

turfster · December 2, 2015, 9:32pm

Thanks, that did it.
I’d set it as the right answer, but for some reason, I only get an upvote and no “answer” button.

anonymous_user_b25e2f751 · April 25, 2017, 11:21am

Hi, I’m struggling with implementing a propertyHandle and ThumbnailPool. Can someone point me to an example that shows me how to use them?

thanks in advance!