Guidebook Computer UI

Add custom shortcuts to the in-game computer and ship your own pages/apps — in C# and Lua. Internals: docs/modding/computer-ui.md. Registry: gregCore.UI.GregComputer.

What you get

The computer (Il2Cpp.ComputerShop) has a main screen with vanilla buttons (Shop, Balance Sheet, Hire, Network Map, …). gregCore lets you:

1. Inject shortcut buttons next to them (cloned from the first labeled vanilla button, deduped, re-synced on every main-screen visit).
2. Open your own app page: C# gets a frame page (title + your content + Back button, input-locked); Lua gets a tablet page you fill with panel_add_*.
3. React to events: greg.COMPUTER.ShortcutClicked, greg.COMPUTER.AppOpened, greg.COMPUTER.AppClosed.

C# (5 minutes)

public override void OnLoad()
{
    if (!GregHost.HasCore) return;
    GregComputer.RegisterApp("my_mod", "fleet", "Fleet Manager",
        builder => builder.AddHeadline("Fleet").AddLabel("All systems nominal."));
    GregComputer.RegisterShortcut("my_mod", "fleet", "Fleet Manager",
        onClick: null, appId: "fleet");
}

public override void OnUnload()
{
    GregComputer.UnregisterAll("my_mod");
}

Open the computer in-game → main screen → your “Fleet Manager” button → your page with a Back button. Full API (TryOpenApp, CloseApp, Shortcuts(), Apps(), ordering via order): docs/modding/computer-ui.md.

Lua (5 minutes)

function on_init()
    greg.computer.register_app("fleet", "Fleet Manager", function(handle)
        panel_add_label(handle, "Broken: " .. tostring(greg.server.broken_count()))
        panel_add_button(handle, "Repair all", function()
            local fixed = greg.server.repair_all()
            greg.ui.notify("Repaired " .. tostring(fixed) .. " servers.")
        end)
        panel_add_button(handle, "Close", function()
            greg.computer.close_app()
        end)
    end)
    greg.computer.register_shortcut("fleet", "Fleet Manager", "fleet")
end

register_shortcut(id, label, fn_or_appid): a function runs on click, a string opens that app. Introspect with list_shortcuts() / list_apps() / current_app().

Checklist

• Button appears on the computer main screen (open computer → main screen; if not, check the loader log for patch errors).
• Click opens your page; Back (C#) or your Close button (Lua) returns; closing the computer releases everything.
• Uninstall/reload removes buttons and pages (no stale greg-computer-* clones).
• One shortcut per idea; order under 100 floats yours to the top.

Limits (v1): main screen only, labels only (no icons yet), Lua pages carry no input lock — details in docs/modding/computer-ui.md.