How can I implement an ‘ALT+Z’ accessibility feature for toggling certain UI elements in my game using Unreal Engine?

Implementing ‘ALT+Z’ Accessibility Feature in Unreal Engine

Understanding ALT+Z Binding Conflicts

When implementing the ALT+Z shortcut in Unreal Engine, developers must first consider potential conflicts with system-level shortcuts, such as the NVIDIA Geforce Experience overlay. Ensure that user’s ability to override or disable the system-level shortcut is an option.

Customizing Key Shortcuts

To customize key shortcuts in Unreal Engine, use the Input Manager. This section allows binding different actions and axis mappings. Navigate to Edit > Project Settings > Input to configure your bindings.

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{
  "ActionMappings": [
    {
      "ActionName": "ToggleUI",
      "Key": "LeftAlt+Z"
    }
  ]
}

Map the desired action, such as toggling UI elements, to the ALT+Z combination. Make sure to check the key’s availability across different platforms and configurations.

Implementing the Toggle Function

Upon determining the key bindings, implement the function for toggling UI elements. Here is a typical implementation scenario in Unreal Engine using Blueprint or C++:

Blueprint Example

• Create a new Blueprint, preferably of the Player Character or Player Controller class.
• Add an Input Action for ToggleUI.
• Within the Blueprint Editor, implement logic to toggle UI element visibility.

C++ Example

void AMyCharacter::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{
    Super::SetupPlayerInputComponent(PlayerInputComponent);
    PlayerInputComponent->BindAction("ToggleUI", IE_Pressed, this, &AMyCharacter::ToggleUIVisibility);
}

void AMyCharacter::ToggleUIVisibility()
{
    if (UIElement)
    {
        UIElement->SetVisibility(!UIElement->IsVisible());
    }
}

This C++ code binds the ToggleUI action to a function that flips the visibility state of a targeted UI element.

Testing and Conflict Resolution

Test the setup thoroughly, especially if the game will be accessible alongside NVIDIA and other overlays. Additionally, provide users with an interface to remap keys should any conflict arise.