Using UMG with C++

Development Programming & Scripting UI
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1

I’ve followed this tutorial in an attempt to use a UMG widget I’ve defined in the editor. While the build succeeds, when I check the error list in visual studio, there are literally a hundred errors–most of which are failure to open sources files included in UMG.h. I’ve checked several times and looked at different tutorials/questions on this subject and have added the right things in Build.cs, added the umg/slate includes in ProjectName.h, built, rebuilt, etc. but I’m still getting those errors.

Has anyone else had this issue? What could be wrong?

2

Add module UMG in YouProjecName.Build.cs.

Add UMG.h includes in ProjecName.h

I don’t got your problems.

Can you post your codes?
Let me have a look.

3

ProjectName.h

#ifndef __PROJECT_H__
#define __PROJECT_H__

#include "EngineMinimal.h"

#include "Runtime/UMG/Public/UMG.h"
#include "Runtime/UMG/Public/UMGStyle.h"
#include "Runtime/UMG/Public/Slate/SObjectWidget.h"
#include "Runtime/UMG/Public/IUMGModule.h"
#include "Runtime/UMG/Public/Blueprint/UserWidget.h"

#endif

ProjectName.Build.cs

using UnrealBuildTool;

public class Project: ModuleRules
{
	public Project(TargetInfo Target)
	{
		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "UMG" });
		PrivateDependencyModuleNames.AddRange(new string[] { "Slate", "SlateCore" });
	}
}

After compiling, I get this:

========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========

And yet, at the same time, this:

49448-error.png
49448-error.png1432×642 41.3 KB

4

Don’t bother about intellisense errors, UnrealHeaderTool and UnrealBuildTool generate lot of defines and code and Intellisense goes nut with it.

Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped means that everything compiled and you should works fine :slight_smile:

5

Agree with you.
Intellisense errors can be ignored.

6

Thanks! But as I trained myself to ignore the existence of these errors this morning, I tried to declare a UUserWidget after including "Blueprint/UserWidget.h" at the top of my file–and this time, the build failed. UUserWidget is not sensed as a type name, and a ‘cannot open source’ error occurs.

7

If you’re interested in integrating UMG with Slate, you can read our guide here.