KeyMappings.hh

Go to the documentation of this file.

#ifndef KEYMAPPINGS_HH
#define KEYMAPPINGS_HH
 
#include "ranges.hh"
 
#include <imgui.h>
#include <SDL.h>
 
#include <array>
 
namespace openmsx {
 
// Here we define the mapping between ImGui and SDL (just once).
// This will be used to generate two mapping functions (for both directions).
struct ImGui_SDL_Key {
        ImGuiKey imgui;
        SDL_Keycode sdl;
};
inline constexpr auto unsortedKeys = std::to_array<ImGui_SDL_Key>({
        {ImGuiKey_Tab,            SDLK_TAB},
        {ImGuiKey_LeftArrow,      SDLK_LEFT},
        {ImGuiKey_RightArrow,     SDLK_RIGHT},
        {ImGuiKey_UpArrow,        SDLK_UP},
        {ImGuiKey_DownArrow,      SDLK_DOWN},
        {ImGuiKey_PageUp,         SDLK_PAGEUP},
        {ImGuiKey_PageDown,       SDLK_PAGEDOWN},
        {ImGuiKey_Home,           SDLK_HOME},
        {ImGuiKey_End,            SDLK_END},
        {ImGuiKey_Insert,         SDLK_INSERT},
        {ImGuiKey_Delete,         SDLK_DELETE},
        {ImGuiKey_Backspace,      SDLK_BACKSPACE},
        {ImGuiKey_Space,          SDLK_SPACE},
        {ImGuiKey_Enter,          SDLK_RETURN},
        {ImGuiKey_Escape,         SDLK_ESCAPE},
        {ImGuiKey_Apostrophe,     SDLK_QUOTE},
        {ImGuiKey_Comma,          SDLK_COMMA},
        {ImGuiKey_Minus,          SDLK_MINUS},
        {ImGuiKey_Period,         SDLK_PERIOD},
        {ImGuiKey_Slash,          SDLK_SLASH},
        {ImGuiKey_Semicolon,      SDLK_SEMICOLON},
        {ImGuiKey_Equal,          SDLK_EQUALS},
        {ImGuiKey_LeftBracket,    SDLK_LEFTBRACKET},
        {ImGuiKey_Backslash,      SDLK_BACKSLASH},
        {ImGuiKey_RightBracket,   SDLK_RIGHTBRACKET},
        {ImGuiKey_GraveAccent,    SDLK_BACKQUOTE},
        {ImGuiKey_CapsLock,       SDLK_CAPSLOCK},
        {ImGuiKey_ScrollLock,     SDLK_SCROLLLOCK},
        {ImGuiKey_NumLock,        SDLK_NUMLOCKCLEAR},
        {ImGuiKey_PrintScreen,    SDLK_PRINTSCREEN},
        {ImGuiKey_Pause,          SDLK_PAUSE},
        {ImGuiKey_Keypad0,        SDLK_KP_0},
        {ImGuiKey_Keypad1,        SDLK_KP_1},
        {ImGuiKey_Keypad2,        SDLK_KP_2},
        {ImGuiKey_Keypad3,        SDLK_KP_3},
        {ImGuiKey_Keypad4,        SDLK_KP_4},
        {ImGuiKey_Keypad5,        SDLK_KP_5},
        {ImGuiKey_Keypad6,        SDLK_KP_6},
        {ImGuiKey_Keypad7,        SDLK_KP_7},
        {ImGuiKey_Keypad8,        SDLK_KP_8},
        {ImGuiKey_Keypad9,        SDLK_KP_9},
        {ImGuiKey_KeypadDecimal,  SDLK_KP_PERIOD},
        {ImGuiKey_KeypadDivide,   SDLK_KP_DIVIDE},
        {ImGuiKey_KeypadMultiply, SDLK_KP_MULTIPLY},
        {ImGuiKey_KeypadSubtract, SDLK_KP_MINUS},
        {ImGuiKey_KeypadAdd,      SDLK_KP_PLUS},
        {ImGuiKey_KeypadEnter,    SDLK_KP_ENTER},
        {ImGuiKey_KeypadEqual,    SDLK_KP_EQUALS},
        {ImGuiKey_LeftCtrl,       SDLK_LCTRL},
        {ImGuiKey_LeftShift,      SDLK_LSHIFT},
        {ImGuiKey_LeftAlt,        SDLK_LALT},
        {ImGuiKey_LeftSuper,      SDLK_LGUI},
        {ImGuiKey_RightCtrl,      SDLK_RCTRL},
        {ImGuiKey_RightShift,     SDLK_RSHIFT},
        {ImGuiKey_RightAlt,       SDLK_RALT},
        {ImGuiKey_RightSuper,     SDLK_RGUI},
        {ImGuiKey_Menu,           SDLK_APPLICATION},
        {ImGuiKey_0,              SDLK_0},
        {ImGuiKey_1,              SDLK_1},
        {ImGuiKey_2,              SDLK_2},
        {ImGuiKey_3,              SDLK_3},
        {ImGuiKey_4,              SDLK_4},
        {ImGuiKey_5,              SDLK_5},
        {ImGuiKey_6,              SDLK_6},
        {ImGuiKey_7,              SDLK_7},
        {ImGuiKey_8,              SDLK_8},
        {ImGuiKey_9,              SDLK_9},
        {ImGuiKey_A,              SDLK_a},
        {ImGuiKey_B,              SDLK_b},
        {ImGuiKey_C,              SDLK_c},
        {ImGuiKey_D,              SDLK_d},
        {ImGuiKey_E,              SDLK_e},
        {ImGuiKey_F,              SDLK_f},
        {ImGuiKey_G,              SDLK_g},
        {ImGuiKey_H,              SDLK_h},
        {ImGuiKey_I,              SDLK_i},
        {ImGuiKey_J,              SDLK_j},
        {ImGuiKey_K,              SDLK_k},
        {ImGuiKey_L,              SDLK_l},
        {ImGuiKey_M,              SDLK_m},
        {ImGuiKey_N,              SDLK_n},
        {ImGuiKey_O,              SDLK_o},
        {ImGuiKey_P,              SDLK_p},
        {ImGuiKey_Q,              SDLK_q},
        {ImGuiKey_R,              SDLK_r},
        {ImGuiKey_S,              SDLK_s},
        {ImGuiKey_T,              SDLK_t},
        {ImGuiKey_U,              SDLK_u},
        {ImGuiKey_V,              SDLK_v},
        {ImGuiKey_W,              SDLK_w},
        {ImGuiKey_X,              SDLK_x},
        {ImGuiKey_Y,              SDLK_y},
        {ImGuiKey_Z,              SDLK_z},
        {ImGuiKey_F1,             SDLK_F1},
        {ImGuiKey_F2,             SDLK_F2},
        {ImGuiKey_F3,             SDLK_F3},
        {ImGuiKey_F4,             SDLK_F4},
        {ImGuiKey_F5,             SDLK_F5},
        {ImGuiKey_F6,             SDLK_F6},
        {ImGuiKey_F7,             SDLK_F7},
        {ImGuiKey_F8,             SDLK_F8},
        {ImGuiKey_F9,             SDLK_F9},
        {ImGuiKey_F10,            SDLK_F10},
        {ImGuiKey_F11,            SDLK_F11},
        {ImGuiKey_F12,            SDLK_F12},
        {ImGuiKey_F13,            SDLK_F13},
        {ImGuiKey_F14,            SDLK_F14},
        {ImGuiKey_F15,            SDLK_F15},
        {ImGuiKey_F16,            SDLK_F16},
        {ImGuiKey_F17,            SDLK_F17},
        {ImGuiKey_F18,            SDLK_F18},
        {ImGuiKey_F19,            SDLK_F19},
        {ImGuiKey_F20,            SDLK_F20},
        {ImGuiKey_F21,            SDLK_F21},
        {ImGuiKey_F22,            SDLK_F22},
        {ImGuiKey_F23,            SDLK_F23},
        {ImGuiKey_F24,            SDLK_F24},
        {ImGuiKey_AppBack,        SDLK_AC_BACK},
        {ImGuiKey_AppForward,     SDLK_AC_FORWARD},
        // ... order doesn't matter
});
 
[[nodiscard]] inline SDL_Keycode ImGuiKey2SDL(ImGuiKey imgui)
{
        static constexpr auto lookup = []{
                auto result = unsortedKeys;
                ranges::sort(result, {}, &ImGui_SDL_Key::imgui);
                return result;
        }();
        auto it = ranges::lower_bound(lookup, imgui, {}, &ImGui_SDL_Key::imgui);
        return ((it != lookup.end()) && (it->imgui == imgui)) ? it->sdl : SDLK_UNKNOWN;
}
 
[[nodiscard]] inline ImGuiKey SDLKey2ImGui(SDL_Keycode sdl)
{
        static constexpr auto lookup = []{
                auto result = unsortedKeys;
                ranges::sort(result, {}, &ImGui_SDL_Key::sdl);
                return result;
        }();
        auto it = ranges::lower_bound(lookup, sdl, {}, &ImGui_SDL_Key::sdl);
        return ((it != lookup.end()) && (it->sdl == sdl)) ? it->imgui : ImGuiKey_None;
}
 
} // namespace openmsx
 
#endif