(Solved) How to do Automatic Controller Detection?

[SypherZent]

Okay, I need my game to automatically detect controller input the way AAA games are currently handling controller detection.

Here's how it goes: As soon as player presses any button on controller, a variable is set to a state where the game knows a controller is being used. If the player then presses any button on keyboard, or mouse, that same variable reverts back to detecting keyboard/mouse (no controller). This is used to display HELP guides (i.e. images that show buttons, where you explain to the user if they press a certain button, a certain thing happens).

For example, main menu, if the player presses ANY button on controller (usually DOWN to select New Game), I want an image to appear on the right that shows the Right Trigger RT button next to the thing it activates, and B button to Exit Game. If they then grab mouse and hover over anything or press DOWN on keyboard (instead of controller) I want those images to disappear. Handling everything is easy once I understand how to detect controller usage. If you want a specific example of a game that does this, Titanfall 2 does it exactly as I am describing. I think even their loading screens say 'Pressing (button) will (do this)' and the button changes from controller to keyboard depending on what the player last pressed.

So, how can I detect that the player last pressed a button on their controller and override this value if they last pressed a button on their keyboard?

I already have a worst-case scenario solution to do what I need, but I'm hoping there is a more optimal and straightforward way to do this than to run a screen action for every possible case, in every screen where I need the detection.

Thanks in advance for any help with this.


Solved
I worked around this issue by separating screen actions for gamepad from keyboard and using this to detect what was pressed, then switching the variable internally. For the image notation, I allow the user to select via Settings which type of controller they are using (i.e. PS4, XBox, NS).