touchscreeneditor.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2024 grorp, Gregor Parzefall <grorp@posteo.de>
 
#pragma once
 
#include "touchscreenlayout.h"
#include "modalMenu.h"
 
#include <memory>
#include <unordered_map>
 
class ISimpleTextureSource;
namespace irr::gui
{
        class IGUIImage;
}
 
class GUITouchscreenLayout : public GUIModalMenu
{
public:
        GUITouchscreenLayout(gui::IGUIEnvironment* env,
            gui::IGUIElement* parent, s32 id,
            IMenuManager *menumgr, ISimpleTextureSource *tsrc);
        ~GUITouchscreenLayout();
 
        void regenerateGui(v2u32 screensize);
        void drawMenu();
        bool OnEvent(const SEvent& event);
 
protected:
        std::wstring getLabelByID(s32 id) { return L""; }
        std::string getNameByID(s32 id) { return ""; }
 
private:
        ISimpleTextureSource *m_tsrc;
 
        ButtonLayout m_layout;
        v2u32 m_last_screensize;
        s32 m_button_size;
 
        enum class Mode {
                Default,
                Dragging,
                Add,
        };
        Mode m_mode = Mode::Default;
 
        std::unordered_map<touch_gui_button_id, std::shared_ptr<gui::IGUIImage>> m_gui_images;
        // unused if m_mode == Mode::Add
        std::unordered_map<touch_gui_button_id, v2s32> m_gui_images_target_pos;
        void clearGUIImages();
        void regenerateGUIImagesRegular(v2u32 screensize);
        void regenerateGUIImagesAddMode(v2u32 screensize);
        void interpolateGUIImages();
 
        // interaction state
        bool m_mouse_down = false;
        v2s32 m_last_mouse_pos;
        touch_gui_button_id m_selected_btn = touch_gui_button_id_END;
 
        // dragging
        ButtonLayout m_last_good_layout;
        std::vector<core::recti> m_error_rects;
        void updateDragState(v2u32 screensize, v2s32 mouse_movement);
 
        // add mode
        ButtonLayout m_add_layout;
        std::vector<std::shared_ptr<gui::IGUIStaticText>> m_add_button_titles;
 
        // Menu GUI elements
        std::shared_ptr<gui::IGUIStaticText> m_gui_help_text;
 
        std::shared_ptr<gui::IGUIButton> m_gui_add_btn;
        std::shared_ptr<gui::IGUIButton> m_gui_reset_btn;
        std::shared_ptr<gui::IGUIButton> m_gui_done_btn;
 
        std::shared_ptr<gui::IGUIButton> m_gui_remove_btn;
 
        void regenerateMenu(v2u32 screensize);
};