gui_key_binder.hpp

#ifndef LXGUI_GUI_KEY_BINDER_HPP
#define LXGUI_GUI_KEY_BINDER_HPP
 
#include "lxgui/input_keys.hpp"
#include "lxgui/lxgui.hpp"
#include "lxgui/utils_signal.hpp"
 
#include <lxgui/extern_sol2_protected_function.hpp>
#include <string>
#include <vector>
 
namespace lxgui::gui {
 
class event_emitter;
 
class key_binder {
    using signal_type = utils::signal<void()>;
 
public:
    using function_type = signal_type::function_type;
 
    key_binder() = default;
 
    // Non-copiable, non-movable.
    key_binder(const key_binder&) = delete;
    key_binder(key_binder&&)      = delete;
    key_binder& operator=(const key_binder&) = delete;
    key_binder& operator=(key_binder&&) = delete;
 
    utils::connection
    register_key_binding(std::string_view name, sol::protected_function lua_function);
 
    utils::connection register_key_binding(std::string_view name, function_type function);
 
    void set_key_binding(std::string_view name, std::string_view key_name);
 
    void set_key_binding(
        std::string_view name,
        input::key       key_id,
        bool             shift_is_pressed,
        bool             ctrl_is_pressed,
        bool             alt_is_pressed);
 
    void remove_key_binding(std::string_view name);
 
    bool on_key_down(
        input::key key_id, bool shift_is_pressed, bool ctrl_is_pressed, bool alt_is_pressed);
 
private:
    struct key_binding {
        std::string name;
 
        input::key key_id           = input::key::k_unassigned;
        bool       shift_is_pressed = false;
        bool       ctrl_is_pressed  = false;
        bool       alt_is_pressed   = false;
 
        signal_type signal;
    };
 
    key_binding* find_binding_(
        input::key key_id, bool shift_is_pressed, bool ctrl_is_pressed, bool alt_is_pressed);
 
    std::vector<key_binding> key_bindings_;
};
 
} // namespace lxgui::gui
 
#endif