How to change the icon displayed on custom node or macro?

[dzemzmcdonalda]

Hello,

I’m looking for a way of changing the icon that displays on macro nodes or custom nodes placed in Blueprint Graph.

Many of default Unreal nodes use custom icons so I believe this is somehow possible to do.
Espesially the ...\Engine\Content\EditorBlueprintResources\StandardMacros.uasset has so many stuff with cutom icons in it:

I already tried to reverse engineer the logic behind it and found this .cpp::
https://github.com/EpicGames/UnrealEngine/blob/release/Engine/Source/Editor/BlueprintGraph/Private/K2Node_MacroInstance.cpp
In which there is code that probably handles the replacement of icons:

FSlateIcon UK2Node_MacroInstance::GetIconAndTint(FLinearColor& OutColor) const
{
	const char* IconName = "GraphEditor.Macro_16x";

	// Special case handling for standard macros
	// @TODO Change this to a SlateBurushAsset pointer on the graph or something similar, to allow any macro to have an icon
	UEdGraph* MacroGraph = MacroGraphReference.GetGraph();
	if(MacroGraph != nullptr && MacroGraph->GetOuter()->GetName() == TEXT("StandardMacros"))
	{
		FName MacroName = FName(*MacroGraph->GetName());
		if(	MacroName == TEXT("ForLoop" ) ||
			MacroName == TEXT("ForLoopWithBreak") ||
			MacroName == TEXT("WhileLoop") )
		{
			IconName = "GraphEditor.Macro.Loop_16x";
		}
		/* There is just more else-if's that works exacly the same way as the if statement above */
	}
	return FSlateIcon("EditorStyle", IconName);
}

But I’m not really sure what shall I do with all of it since I’ve never used K2Node_MacroInstance.h.

How can I apply the same icon-swapping logic for custom nodes/macros that I’ve created in my project/plugin ?

I’ll really appreciate any answers
Also this topic was partially asked (but not answered) in this very old post:

How can one define custom icons for custom blueprint events?

Some events have descriptive icons in the top left hand corner, such as this keyboard icon: [8675-1.png] In custom events I’ve created with Cpp, this is always the following default icon: [8676-2.png] How can I change this icon to a .png I have created for a certain class of custom events?

[herb64]

I did not implement any custom nodes myself, but yesterday by chance I came across this article on gamedev.net when searching for other things, and maybe it could be useful for you. I did not get further into it, but there’s quite some info in the article about icons…
I hope, you find some useful information in there.

[dzemzmcdonalda]

So it looks like inheriting from K2Node class and overwriting its functions can do it.
Still don’t know how to implement this in typical function library.
Tho thanks for the article