Unreal Engine C++ developer at mod.io.
- I like creating various Unreal Engine tools that simplify the development process.
- Feel free to email me at [email protected] or join discord chat for any questions.
Modular Features (IModularFeatures) in Unreal Engine
Do not confuse Modular Features with Modular Gameplay Features . Introduction In Unreal Engine, Modular Features is a pretty straightforward system that makes it possible create and manage features that can be enabled or disabled at runtime. Features share the same base interface (derived from IModularFeatures), and they can be registered/unregistered at runtime from any part of the code and any module. This system is widely used in UE, for example, in audio capture, where each platform may have its audio capture implementation registered/unregistered based on the target platform, all using the base interface of IAudioCaptureFactory, which is derived from IModularFeatures....
How to get the currently focused widget in Unreal Engine
In Unreal Engine, you can determine the currently focused widget in both Slate and UMG UI systems. Slate To get the currently focused Slate widget, you can use the following code snippet: // Instead of 0, you can pass the user index if you have multiple users TSharedPtr<SWidget> FocusedSlateWidget = FSlateApplication::Get().GetUserFocusedWidget(0); UMG Getting the currently focused UMG widget is a bit more involved, since there is no direct function to get it or the place where it is stored....
How to execute code on scope exit in Unreal Engine
If you want to execute some code when the scope is exited, you can use the following handy ON_SCOPE_EXIT macro, like this: int32 AnyFunction() { ON_SCOPE_EXIT { // This code will be executed when the scope is exited (after the return statement) }; // Do smth // Just return 100 for example return 100; }
How to save and restore any value with RAII approach in Unreal Engine
Imagine you’re in a situation where you need to save and restore a value. For instance, let’s say you have a UMG widget that you want to hide temporarily, do some stuff, and then bring back its previous visibility state, all within a single function. The most straightforward approach might be to store the value in a temporary variable, modify it, and then revert it back, like this: ESlateVisibility VisibilityState; const ESlateVisibility PreviousVisibility = VisibilityState; VisibilityState = ESlateVisibility::Hidden; // Do smth....
How to cast Slate widgets in Unreal Engine
This brief article addresses the question of how to cast one Slate widget to another in Unreal Engine. Imagine you have an SWidget widget wrapped in a shared pointer like this: TSharedPtr<SWidget> MyWidgetPtr; If you want to cast it, for example, to an SSpacer, your code might look like this: TSharedPtr<SSpacer> MySpacerPtr = StaticCastSharedPtr<SSpacer>(MyWidgetPtr); It’s important to keep in mind that you should verify whether the shared pointer is valid before using it....