BallanceStalker/scripts/stages/MenuManager.cs

using BallanceStalker;
using Godot;
using System;

public class MenuManager : Control {

    public enum MenuPage : int {
        Main,
        LoadLevel,
        LoadSky,
        Multiplayer,
        About
    }

    //[Signal]
    //public delegate void SetMouseCapture();
    [Signal]
    public delegate void ExitGame();

    private MenuMain mMenuMain;
    private MenuPage mCurrentPage;

    // Called when the node enters the scene tree for the first time.
    public override void _Ready() {
        mCurrentPage = MenuPage.Main;

        mMenuMain = GetNode<MenuMain>("MenuMain");
        mMenuMain.Connect(nameof(MenuMain.MenuMain_GotoPage), this, nameof(Proc_MenuMain_GotoPage));
        mMenuMain.Connect(nameof(MenuMain.MenuMain_Back), this, nameof(Proc_MenuMain_Back));
        mMenuMain.Connect(nameof(MenuMain.MenuMain_Exit), this, nameof(Proc_MenuMain_Exit));

        BallanceStalkerCore.StalkerManager.Singleton.EventControllerChanged += Proc_StalkerManager_EventControllerChanged;
    }

    private void Proc_StalkerManager_EventControllerChanged(BallanceStalkerCore.EventControllerSource obj) {
        if (obj == BallanceStalkerCore.EventControllerSource.Menu) {
            this.Visible = true;
        } else {
            this.Visible = false;
        }
    }

    public override void _Input(InputEvent @event) {
        if (!this.Visible) return;

        if (@event.IsActionPressed("ballance_esc")) {
            if (mCurrentPage == MenuPage.Main) {
                // we are in main menu, we need switch visible
                BallanceStalkerCore.StalkerManager.Singleton.SetEventController(BallanceStalkerCore.EventControllerSource.None);
            } else {
                // otherwise, back from sub menu
                RefreshMenuPage(MenuPage.Main);
            }
            // mark handled to prevent loop call
            GetTree().SetInputAsHandled();
        }
    }

    private void RefreshMenuPage(MenuPage page_type) {
        ;//todo: 
        //mCurrentPage = page_type;
    }

    private void Proc_MenuMain_GotoPage(MenuPage menu_type) {
        RefreshMenuPage(menu_type);
    }
    private void Proc_MenuMain_Back() {
        BallanceStalkerCore.StalkerManager.Singleton.SetEventController(BallanceStalkerCore.EventControllerSource.None);
    }
    private void Proc_MenuMain_Exit() {
        EmitSignal(nameof(ExitGame));
    }


}