How do I override OnMouseButton in C++

[Espii77]

I want to override OnMouseButton on the UserWidget in C++, but I keep getting linker errors. What is the correct way o do this?

I will post how I defined it here…

[anonymous_user_e1600e71]

I keep getting linker errors

You need to show us which linker error, otherwise nobody will be able to help you.

For my C++ UUserWidget, I usually just call a C++ function from the widget blueprint, easy :).

[anonymous_user_4b3639a6]

Hey Espii.

You cannot override the OnMouseButtonDown Function itself.

But you can override:

virtual FReply NativeOnMouseButtonDown( const FGeometry& InGeometry, const FPointerEvent& InMouseEvent );

which is the C++ Implementation of OnMouseButtonDown.

You could also override OnMouseButtonDown_Implementation but this Function is now deprecated and NativeOnMouseButtonDown should be overriden instead

Good Luck

Greetings

[Espii77]

I’ve updated the code to

and these are the linker errors I am getting.
Creating library C:\Users\Simon\Documents\Unreal Projects\MyProject2\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-MyProject2.lib and object C:\Users\Simon\Documents\Unreal Projects\MyProject2\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-MyProject2.exp
2>MyHUD.cpp.obj : error LNK2019: unresolved external symbol “__declspec(dllimport) public: static class FReply __cdecl FReply::Handled(void)” (_imp?Handled@FReply@@SA?AV1@XZ) referenced in function “public: __cdecl FEventReply::FEventReply(bool)” (??0FEventReply@@QEAA@_N@Z)
2>MyHUD.cpp.obj : error LNK2019: unresolved external symbol “__declspec(dllimport) public: static class FReply __cdecl FReply::Unhandled(void)” (_imp?Unhandled@FReply@@SA?AV1@XZ) referenced in function “public: __cdecl FEventReply::FEventReply(bool)” (??0FEventReply@@QEAA@_N@Z)
2>MyHUD.cpp.obj : error LNK2019: unresolved external symbol “__declspec(dllimport) public: __cdecl FReply::~FReply(void)” (_imp??1FReply@@QEAA@XZ) referenced in function “public: __cdecl FEventReply::FEventReply(bool)” (??0FEventReply@@QEAA@_N@Z)
2>MyHUD.cpp.obj : error LNK2019: unresolved external symbol “__declspec(dllimport) public: __cdecl FReply::FReply(class FReply &&)” (_imp??0FReply@@QEAA@$$QEAV0@@Z) referenced in function “public: __cdecl FEventReply::FEventReply(bool)” (??0FEventReply@@QEAA@_N@Z)

Also, I get this warning:
warning C4264: ‘FReply UUserWidget::NativeOnMouseButtonDown(const FGeometry &,const FPointerEvent &)’: no override available for virtual member function from base ‘UUserWidget’; function is hidden

[anonymous_user_4b3639a6]

Hey
First try to write a “override” behind NativeOnMouseButtonDown(…)
I don’t think that’s the problem but it’s cooler

Second:
I think you have to include “UMG” “Slate” “SlateCore” to your (ProjectName).Build.cs

This is mine for example:

using UnrealBuildTool;

public class ProjectName: ModuleRules
{
	public ProjectName(TargetInfo Target)
	{
		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "Paper2D", "UMG", "XmlParser" });

		// Uncomment if you are using Slate UI
		PrivateDependencyModuleNames.AddRange(new string[] { "Slate", "SlateCore", "HeadMountedDisplay", "SteamVR" });
    }
}

Just uncomment the Private Section and you should do fine.
And add UMG (Don’t know if needed) to PublicDependencies

Greetings

EDIT:
Ok I just checked.
You need “UMG” “Slate” and “SlateCore”

[Espii77]

Okay, thanks to McStrife, i found the answer…
In {YourProjectName}.build.cs, you just uncomment the line

PrivateDependencyModuleNames.AddRange(new string[] { "Slate", "SlateCore" });

[anonymous_user_4b3639a6]

Glad to have helped you
Just mark my answer as resolved so that everyone knows that this question was answered

Cheers