mainmenumanager.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
#pragma once
 
/*
        All kinds of stuff that needs to be exposed from main.cpp
*/
#include "modalMenu.h"
#include "touchcontrols.h" // g_touchcontrols
#include <cassert>
#include <list>
 
#include <IGUIEnvironment.h>
 
namespace gui {
        class IGUIStaticText;
}
 
class IGameCallback
{
public:
        virtual void exitToOS() = 0;
        virtual void openSettings() = 0;
        virtual void disconnect() = 0;
        virtual void changePassword() = 0;
        virtual void changeVolume() = 0;
        virtual void showOpenURLDialog(const std::string &url) = 0;
        virtual void touchscreenLayout() = 0;
};
 
extern gui::IGUIEnvironment *guienv;
extern gui::IGUIStaticText *guiroot;
 
// Handler for the modal menus
 
class MainMenuManager : public IMenuManager
{
public:
        void createdMenu(gui::IGUIElement *menu) override
        {
                for (gui::IGUIElement *e : m_stack) {
                        if (e == menu)
                                return;
                }
 
                if(!m_stack.empty())
                        m_stack.back()->setVisible(false);
 
                m_stack.push_back(menu);
                guienv->setFocus(m_stack.back());
        }

        void deletingMenu(gui::IGUIElement *menu) override
        {
                // Remove all entries if there are duplicates
                m_stack.remove(menu);
 
                // Reference count reduction (-1) due to focus loss
                if (!m_stack.empty()) {
                        m_stack.back()->setVisible(true);
                        guienv->setFocus(m_stack.back());
                } else {
                        guienv->removeFocus(menu);
                        if (g_touchcontrols)
                                g_touchcontrols->show();
                }
        }
 
        void inhibitKeyEvent(EKEY_CODE key) override
        {
                m_inhibited_key = key;
        }
 
        // Returns true to prevent further processing
        virtual bool preprocessEvent(const SEvent& event)
        {
                if (m_stack.empty())
                        return false;
 
                if (event.EventType == EET_KEY_INPUT_EVENT) {
                        bool ret = event.KeyInput.Key == m_inhibited_key && m_inhibited_key != KEY_UNKNOWN;
                        m_inhibited_key = KEY_UNKNOWN;
                        if (ret)
                                return true;
                }
 
                GUIModalMenu *mm = dynamic_cast<GUIModalMenu*>(m_stack.back());
                return mm && mm->preprocessEvent(event);
        }
 
        size_t menuCount() const
        {
                return m_stack.size();
        }
 
        GUIModalMenu *tryGetTopMenu() const
        {
                if (m_stack.empty())
                        return nullptr;
                return dynamic_cast<GUIModalMenu *>(m_stack.back());
        }
 
        void deleteFront()
        {
                assert(!m_stack.empty());
                gui::IGUIElement *e = m_stack.front();
                e->setVisible(false);
                deletingMenu(e);
                e->remove();
        }
 
        bool pausesGame()
        {
                for (gui::IGUIElement *i : m_stack) {
                        GUIModalMenu *mm = dynamic_cast<GUIModalMenu*>(i);
                        if (mm && mm->pausesGame())
                                return true;
                }
                return false;
        }
 
private:
        EKEY_CODE m_inhibited_key = KEY_UNKNOWN;
        std::list<gui::IGUIElement*> m_stack;
};
 
extern MainMenuManager g_menumgr;
 
static inline bool isMenuActive()
{
        return g_menumgr.menuCount() != 0;
}
 
class MainGameCallback : public IGameCallback
{
public:
        MainGameCallback() = default;
        virtual ~MainGameCallback() = default;
 
        void exitToOS() override
        {
                shutdown_requested = true;
        }
 
        void openSettings() override
        {
                settings_requested = true;
        }
 
        void disconnect() override
        {
                disconnect_requested = true;
        }
 
        void changePassword() override
        {
                changepassword_requested = true;
        }
 
        void changeVolume() override
        {
                changevolume_requested = true;
        }
 
        void touchscreenLayout() override
        {
                touchscreenlayout_requested = true;
        }
 
        void showOpenURLDialog(const std::string &url) override
        {
                show_open_url_dialog = url;
        }
 
        bool disconnect_requested = false;
        bool settings_requested = false;
        bool changepassword_requested = false;
        bool changevolume_requested = false;
        bool touchscreenlayout_requested = false;
        bool shutdown_requested = false;
        std::string show_open_url_dialog = "";
};
 
extern MainGameCallback *g_gamecallback;