How do I implement a feature to exit fullscreen mode in my PC game using a keyboard shortcut?

Implementing a Feature to Exit Fullscreen Mode Using a Keyboard Shortcut in Unity

Setting Up Input Management

To handle keyboard shortcuts for exiting fullscreen mode in Unity, you’ll need to configure the input settings and use scripting to control the fullscreen state. Unity’s Input System package or the older Input Manager can be utilized for this task.

Configuring Input Action

If you’re using the new Input System package:

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1. Install the Input System package from the Unity Package Manager.
2. Create a new ‘Input Actions’ asset and define an action map, for example, ‘General’.
3. Add an action labeled ‘ExitFullscreen’ and assign the desired keyboard shortcut, such as Escape.
4. Generate C# class for the Input Action asset for easy use in scripts.

If using the legacy Input Manager:

1. Go to Edit > Project Settings > Input Manager.
2. Add a new axis and name it ‘ExitFullscreen’.
3. Set the Positive Button to escape.

Scripting Fullscreen Toggle

Create a script to detect when the input is activated and switch the fullscreen mode:

using UnityEngine;

public class FullscreenToggle : MonoBehaviour
{
    private void Update()
    {
        if (IsExitFullscreenPressed())
        {
            ToggleFullscreen();
        }
    }

    private bool IsExitFullscreenPressed()
    {
#if USING_INPUT_SYSTEM
        return InputManager.inputActions.General.ExitFullscreen.triggered;
#else
        return Input.GetButtonDown("ExitFullscreen");
#endif
    }

    private void ToggleFullscreen()
    {
        Screen.fullScreen = !Screen.fullScreen;
    }
}

Attach this script to a GameObject in your scene to monitor the input events and change the fullscreen state accordingly.

Considerations

• User Feedback: Consider displaying a message or indicator when toggling fullscreen to inform the user of the change.
• Platform-Specific Concerns: Fullscreen behavior can vary between operating systems; test your implementation across target platforms.

Testing and Debugging

Ensure thorough testing in both editor and standalone builds to confirm input functionality and correct screen state transitions.