ImGuiSettings.cc

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#include "ImGuiSettings.hh"
 
#include "ImGuiCpp.hh"
#include "ImGuiManager.hh"
#include "ImGuiMessages.hh"
#include "ImGuiOsdIcons.hh"
#include "ImGuiSoundChip.hh"
#include "ImGuiUtils.hh"
 
#include "BooleanInput.hh"
#include "BooleanSetting.hh"
#include "CPUCore.hh"
#include "Display.hh"
#include "EventDistributor.hh"
#include "FileContext.hh"
#include "FilenameSetting.hh"
#include "FloatSetting.hh"
#include "GlobalCommandController.hh"
#include "GlobalSettings.hh"
#include "InputEventFactory.hh"
#include "InputEventGenerator.hh"
#include "IntegerSetting.hh"
#include "JoyMega.hh"
#include "KeyCodeSetting.hh"
#include "KeyboardSettings.hh"
#include "Mixer.hh"
#include "MSXCPU.hh"
#include "MSXCommandController.hh"
#include "MSXJoystick.hh"
#include "MSXMotherBoard.hh"
#include "ProxySetting.hh"
#include "R800.hh"
#include "Reactor.hh"
#include "ReadOnlySetting.hh"
#include "SettingsManager.hh"
#include "StringSetting.hh"
#include "Version.hh"
#include "VideoSourceSetting.hh"
#include "Z80.hh"
 
#include "checked_cast.hh"
#include "foreach_file.hh"
#include "narrow.hh"
#include "StringOp.hh"
#include "unreachable.hh"
#include "zstring_view.hh"
 
#include <imgui.h>
#include <imgui_stdlib.h>
 
#include <SDL.h>
 
#include <optional>
 
using namespace std::literals;
 
namespace openmsx {
 
ImGuiSettings::~ImGuiSettings()
{
        deinitListener();
}
 
void ImGuiSettings::save(ImGuiTextBuffer& buf)
{
        savePersistent(buf, *this, persistentElements);
}
 
void ImGuiSettings::loadLine(std::string_view name, zstring_view value)
{
        loadOnePersistent(name, value, *this, persistentElements);
}
 
void ImGuiSettings::loadEnd()
{
        setStyle();
}
 
void ImGuiSettings::setStyle() const
{
        switch (selectedStyle) {
        case 0: ImGui::StyleColorsDark();    break;
        case 1: ImGui::StyleColorsLight();   break;
        case 2: ImGui::StyleColorsClassic(); break;
        }
        setColors(selectedStyle);
}
 
// Returns the currently pressed key-chord, or 'ImGuiKey_None' if no
// (non-modifier) key is pressed.
// If more than (non-modifier) one key is pressed, this returns an arbitrary key
// (in the current implementation the one with lowest index).
[[nodiscard]] static ImGuiKeyChord getCurrentlyPressedKeyChord()
{
        static constexpr auto mods = std::array{
                ImGuiKey_LeftCtrl, ImGuiKey_LeftShift, ImGuiKey_LeftAlt, ImGuiKey_LeftSuper,
                ImGuiKey_RightCtrl, ImGuiKey_RightShift, ImGuiKey_RightAlt, ImGuiKey_RightSuper,
                ImGuiKey_ReservedForModCtrl, ImGuiKey_ReservedForModShift, ImGuiKey_ReservedForModAlt,
                ImGuiKey_ReservedForModSuper, ImGuiKey_MouseLeft, ImGuiKey_MouseRight, ImGuiKey_MouseMiddle,
                ImGuiKey_MouseX1, ImGuiKey_MouseX2, ImGuiKey_MouseWheelX, ImGuiKey_MouseWheelY,
        };
        for (int key = ImGuiKey_NamedKey_BEGIN; key < ImGuiKey_NamedKey_END; ++key) {
                // This is O(M*N), if needed could be optimized to be O(M+N).
                if (contains(mods, key)) continue; // skip: mods can't be primary keys in a KeyChord
                if (ImGui::IsKeyPressed(static_cast<ImGuiKey>(key))) {
                        const ImGuiIO& io = ImGui::GetIO();
                        return key
                             | (io.KeyCtrl  ? ImGuiMod_Ctrl  : 0)
                             | (io.KeyShift ? ImGuiMod_Shift : 0)
                             | (io.KeyAlt   ? ImGuiMod_Alt   : 0)
                             | (io.KeySuper ? ImGuiMod_Super : 0);
                }
        }
        return ImGuiKey_None;
}
 
void ImGuiSettings::showMenu(MSXMotherBoard* motherBoard)
{
        bool openConfirmPopup = false;
 
        im::Menu("Settings", [&]{
                auto& reactor = manager.getReactor();
                auto& globalSettings = reactor.getGlobalSettings();
                auto& renderSettings = reactor.getDisplay().getRenderSettings();
                const auto& settingsManager = reactor.getGlobalCommandController().getSettingsManager();
                const auto& hotKey = reactor.getHotKey();
 
                im::Menu("Video", [&]{
                        im::TreeNode("Look and feel", ImGuiTreeNodeFlags_DefaultOpen, [&]{
                                auto& scaler = renderSettings.getScaleAlgorithmSetting();
                                ComboBox("Scaler", scaler);
                                im::Indent([&]{
                                        struct AlgoEnable {
                                                RenderSettings::ScaleAlgorithm algo;
                                                bool hasScanline;
                                                bool hasBlur;
                                        };
                                        using enum RenderSettings::ScaleAlgorithm;
                                        static constexpr std::array algoEnables = {
                                                //                 scanline / blur
                                                AlgoEnable{SIMPLE,     true,  true },
                                                AlgoEnable{SCALE,      false, false},
                                                AlgoEnable{HQ,         false, false},
                                                AlgoEnable{HQLITE,     false, false},
                                                AlgoEnable{RGBTRIPLET, true,  true },
                                                AlgoEnable{TV,         true,  false},
                                        };
                                        auto it = ranges::find(algoEnables, scaler.getEnum(), &AlgoEnable::algo);
                                        assert(it != algoEnables.end());
                                        im::Disabled(!it->hasScanline, [&]{
                                                SliderInt("Scanline (%)", renderSettings.getScanlineSetting());
                                        });
                                        im::Disabled(!it->hasBlur, [&]{
                                                SliderInt("Blur (%)", renderSettings.getBlurSetting());
                                        });
                                });
 
                                SliderInt("Scale factor", renderSettings.getScaleFactorSetting());
                                Checkbox(hotKey, "Deinterlace", renderSettings.getDeinterlaceSetting());
                                Checkbox(hotKey, "Deflicker", renderSettings.getDeflickerSetting());
                        });
                        im::TreeNode("Colors", ImGuiTreeNodeFlags_DefaultOpen, [&]{
                                SliderFloat("Noise (%)", renderSettings.getNoiseSetting());
                                SliderFloat("Brightness", renderSettings.getBrightnessSetting());
                                SliderFloat("Contrast", renderSettings.getContrastSetting());
                                SliderFloat("Gamma", renderSettings.getGammaSetting());
                                SliderInt("Glow (%)", renderSettings.getGlowSetting());
                                if (auto* monitor = dynamic_cast<Setting*>(settingsManager.findSetting("monitor_type"))) {
                                        ComboBox("Monitor type", *monitor, [](std::string s) {
                                                ranges::replace(s, '_', ' ');
                                                return s;
                                        });
                                }
                        });
                        im::TreeNode("Shape", ImGuiTreeNodeFlags_DefaultOpen, [&]{
                                SliderFloat("Horizontal stretch", renderSettings.getHorizontalStretchSetting(), "%.0f");
                                ComboBox("Display deformation", renderSettings.getDisplayDeformSetting());
                        });
                        im::TreeNode("Misc", ImGuiTreeNodeFlags_DefaultOpen, [&]{
                                Checkbox(hotKey, "Full screen", renderSettings.getFullScreenSetting());
                                if (motherBoard) {
                                        ComboBox("Video source to display", motherBoard->getVideoSource());
                                }
                                Checkbox(hotKey, "VSync", renderSettings.getVSyncSetting());
                                SliderInt("Minimum frame-skip", renderSettings.getMinFrameSkipSetting()); // TODO: either leave out this setting, or add a tooltip like, "Leave on 0 unless you use a very slow device and want regular frame skipping");
                                SliderInt("Maximum frame-skip", renderSettings.getMaxFrameSkipSetting()); // TODO: either leave out this setting or add a tooltip like  "On slow devices, skip no more than this amount of frames to keep emulation on time.");
                        });
                        im::TreeNode("Advanced (for debugging)", [&]{ // default collapsed
                                Checkbox(hotKey, "Enforce VDP sprites-per-line limit", renderSettings.getLimitSpritesSetting());
                                Checkbox(hotKey, "Disable sprites", renderSettings.getDisableSpritesSetting());
                                ComboBox("Way to handle too fast VDP access", renderSettings.getTooFastAccessSetting());
                                ComboBox("Emulate VDP command timing", renderSettings.getCmdTimingSetting());
                        });
                });
                im::Menu("Sound", [&]{
                        auto& mixer = reactor.getMixer();
                        auto& muteSetting = mixer.getMuteSetting();
                        im::Disabled(muteSetting.getBoolean(), [&]{
                                SliderInt("Master volume", mixer.getMasterVolume());
                        });
                        Checkbox(hotKey, "Mute", muteSetting);
                        ImGui::Separator();
                        static constexpr std::array resamplerToolTips = {
                                EnumToolTip{"hq",   "best quality, uses more CPU"},
                                EnumToolTip{"blip", "good speed/quality tradeoff"},
                                EnumToolTip{"fast", "fast but low quality"},
                        };
                        ComboBox("Resampler", globalSettings.getResampleSetting(), resamplerToolTips);
                        ImGui::Separator();
 
                        ImGui::MenuItem("Show sound chip settings", nullptr, &manager.soundChip->showSoundChipSettings);
                });
                im::Menu("Speed", [&]{
                        im::TreeNode("Emulation", ImGuiTreeNodeFlags_DefaultOpen, [&]{
                                ImGui::SameLine();
                                HelpMarker("These control the speed of the whole MSX machine, "
                                           "the running MSX software can't tell the difference.");
 
                                auto& speedManager = globalSettings.getSpeedManager();
                                auto& fwdSetting = speedManager.getFastForwardSetting();
                                int fastForward = fwdSetting.getBoolean() ? 1 : 0;
                                ImGui::TextUnformatted("Speed:"sv);
                                ImGui::SameLine();
                                bool fwdChanged = ImGui::RadioButton("normal", &fastForward, 0);
                                ImGui::SameLine();
                                fwdChanged |= ImGui::RadioButton("fast forward", &fastForward, 1);
                                if (auto fastForwardShortCut = getShortCutForCommand(reactor.getHotKey(), "toggle fastforward");
                                    !fastForwardShortCut.empty()) {
                                        HelpMarker(strCat("Use '", fastForwardShortCut ,"' to quickly toggle between these two"));
                                }
                                if (fwdChanged) {
                                        fwdSetting.setBoolean(fastForward != 0);
                                }
                                im::Indent([&]{
                                        im::Disabled(fastForward != 0, [&]{
                                                SliderInt("Speed (%)", speedManager.getSpeedSetting());
                                        });
                                        im::Disabled(fastForward != 1, [&]{
                                                SliderInt("Fast forward speed (%)", speedManager.getFastForwardSpeedSetting());
                                        });
                                });
                                Checkbox(hotKey, "Go full speed when loading", globalSettings.getThrottleManager().getFullSpeedLoadingSetting());
                        });
                        if (motherBoard) {
                                im::TreeNode("MSX devices", ImGuiTreeNodeFlags_DefaultOpen, [&]{
                                        ImGui::SameLine();
                                        HelpMarker("These control the speed of the specific components in the MSX machine. "
                                                "So the relative speed between components can change. "
                                                "And this may lead the emulation problems.");
 
                                        MSXCPU& cpu = motherBoard->getCPU();
                                        auto showFreqSettings = [&](std::string_view name, auto* core) {
                                                if (!core) return;
                                                auto& locked = core->getFreqLockedSetting();
                                                auto& value = core->getFreqValueSetting();
                                                // Note: GUI shows "UNlocked", while the actual settings is "locked"
                                                bool unlocked = !locked.getBoolean();
                                                if (ImGui::Checkbox(tmpStrCat("unlock custom ", name, " frequency").c_str(), &unlocked)) {
                                                        locked.setBoolean(!unlocked);
                                                }
                                                simpleToolTip([&]{ return locked.getDescription(); });
                                                im::Indent([&]{
                                                        im::Disabled(!unlocked, [&]{
                                                                float fval = float(value.getInt()) / 1.0e6f;
                                                                if (ImGui::InputFloat(tmpStrCat("frequency (MHz)##", name).c_str(), &fval, 0.01f, 1.0f, "%.2f")) {
                                                                        value.setInt(int(fval * 1.0e6f));
                                                                }
                                                                im::PopupContextItem(tmpStrCat("freq-context##", name).c_str(), [&]{
                                                                        const char* F358 = name == "Z80" ? "3.58 MHz (default)"
                                                                                                         : "3.58 MHz";
                                                                        if (ImGui::Selectable(F358)) {
                                                                                value.setInt(3'579'545);
                                                                        }
                                                                        if (ImGui::Selectable("5.37 MHz")) {
                                                                                value.setInt(5'369'318);
                                                                        }
                                                                        const char* F716 = name == "R800" ? "7.16 MHz (default)"
                                                                                                          : "7.16 MHz";
                                                                        if (ImGui::Selectable(F716)) {
                                                                                value.setInt(7'159'090);
                                                                        }
 
                                                                });
                                                                HelpMarker("Right-click to select commonly used values");
                                                        });
                                                });
                                        };
                                        showFreqSettings("Z80",  cpu.getZ80());
                                        showFreqSettings("R800", cpu.getR800()); // might be nullptr
                                });
                        }
                });
                im::Menu("Input", [&]{
                        static constexpr std::array kbdModeToolTips = {
                                EnumToolTip{"CHARACTER",  "Tries to understand the character you are typing and then attempts to type that character using the current MSX keyboard. May not work very well when using a non-US host keyboard."},
                                EnumToolTip{"KEY",        "Tries to map a key you press to the corresponding MSX key"},
                                EnumToolTip{"POSITIONAL", "Tries to map the keyboard key positions to the MSX keyboard key positions"},
                        };
                        if (motherBoard) {
                                const auto& controller = motherBoard->getMSXCommandController();
                                if (auto* turbo = dynamic_cast<IntegerSetting*>(controller.findSetting("renshaturbo"))) {
                                        SliderInt("Ren Sha Turbo (%)", *turbo);
                                }
                                if (auto* mappingModeSetting = dynamic_cast<EnumSetting<KeyboardSettings::MappingMode>*>(controller.findSetting("kbd_mapping_mode"))) {
                                        ComboBox("Keyboard mapping mode", *mappingModeSetting, kbdModeToolTips);
                                }
                        }
                        ImGui::MenuItem("Configure MSX joysticks...", nullptr, &showConfigureJoystick);
                });
                im::Menu("GUI", [&]{
                        auto getExistingLayouts = [] {
                                std::vector<std::string> names;
                                for (auto context = userDataFileContext("layouts");
                                     const auto& path : context.getPaths()) {
                                        foreach_file(path, [&](const std::string& fullName, std::string_view name) {
                                                if (name.ends_with(".ini")) {
                                                        names.emplace_back(fullName);
                                                }
                                        });
                                }
                                ranges::sort(names, StringOp::caseless{});
                                return names;
                        };
                        auto listExistingLayouts = [&](const std::vector<std::string>& names) {
                                std::optional<std::pair<std::string, std::string>> selectedLayout;
                                im::ListBox("##select-layout", [&]{
                                        for (const auto& name : names) {
                                                auto displayName = std::string(FileOperations::stripExtension(FileOperations::getFilename(name)));
                                                if (ImGui::Selectable(displayName.c_str())) {
                                                        selectedLayout = std::pair{name, displayName};
                                                }
                                                im::PopupContextItem([&]{
                                                        if (ImGui::MenuItem("delete")) {
                                                                confirmText = strCat("Delete layout: ", displayName);
                                                                confirmAction = [name]{ FileOperations::unlink(name); };
                                                                openConfirmPopup = true;
                                                        }
                                                });
                                        }
                                });
                                return selectedLayout;
                        };
                        im::Menu("Save layout", [&]{
                                if (auto names = getExistingLayouts(); !names.empty()) {
                                        ImGui::TextUnformatted("Existing layouts"sv);
                                        if (auto selectedLayout = listExistingLayouts(names)) {
                                                const auto& [name, displayName] = *selectedLayout;
                                                saveLayoutName = displayName;
                                        }
                                }
                                ImGui::TextUnformatted("Enter name:"sv);
                                ImGui::InputText("##save-layout-name", &saveLayoutName);
                                ImGui::SameLine();
                                im::Disabled(saveLayoutName.empty(), [&]{
                                        if (ImGui::Button("Save as")) {
                                                (void)reactor.getDisplay().getWindowPosition(); // to save up-to-date window position
                                                ImGui::CloseCurrentPopup();
 
                                                auto filename = FileOperations::parseCommandFileArgument(
                                                        saveLayoutName, "layouts", "", ".ini");
                                                if (FileOperations::exists(filename)) {
                                                        confirmText = strCat("Overwrite layout: ", saveLayoutName);
                                                        confirmAction = [filename]{
                                                                ImGui::SaveIniSettingsToDisk(filename.c_str());
                                                        };
                                                        openConfirmPopup = true;
                                                } else {
                                                        ImGui::SaveIniSettingsToDisk(filename.c_str());
                                                }
                                        }
                                });
                        });
                        im::Menu("Restore layout", [&]{
                                ImGui::TextUnformatted("Select layout"sv);
                                auto names = getExistingLayouts();
                                if (auto selectedLayout = listExistingLayouts(names)) {
                                        const auto& [name, displayName] = *selectedLayout;
                                        manager.loadIniFile = name;
                                        ImGui::CloseCurrentPopup();
                                }
                        });
                        im::Menu("Select style", [&]{
                                std::optional<int> newStyle;
                                static constexpr std::array names = {"Dark", "Light", "Classic"}; // must be in sync with setStyle()
                                for (auto i : xrange(narrow<int>(names.size()))) {
                                        if (ImGui::Selectable(names[i], selectedStyle == i)) {
                                                newStyle = i;
                                        }
                                }
                                if (newStyle) {
                                        selectedStyle = *newStyle;
                                        setStyle();
                                }
                        });
                        ImGui::MenuItem("Select font...", nullptr, &showFont);
                        ImGui::MenuItem("Edit shortcuts...", nullptr, &showShortcut);
                });
                im::Menu("Misc", [&]{
                        ImGui::MenuItem("Configure OSD icons...", nullptr, &manager.osdIcons->showConfigureIcons);
                        ImGui::MenuItem("Fade out menu bar", nullptr, &manager.menuFade);
                        ImGui::MenuItem("Configure messages...", nullptr, &manager.messages->configureWindow.open);
                });
                ImGui::Separator();
                im::Menu("Advanced", [&]{
                        ImGui::TextUnformatted("All settings"sv);
                        ImGui::Separator();
                        std::vector<Setting*> settings;
                        for (auto* setting : settingsManager.getAllSettings()) {
                                if (dynamic_cast<ProxySetting*>(setting)) continue;
                                if (dynamic_cast<ReadOnlySetting*>(setting)) continue;
                                settings.push_back(checked_cast<Setting*>(setting));
                        }
                        ranges::sort(settings, StringOp::caseless{}, &Setting::getBaseName);
                        for (auto* setting : settings) {
                                if (auto* bSetting = dynamic_cast<BooleanSetting*>(setting)) {
                                        Checkbox(hotKey, *bSetting);
                                } else if (auto* iSetting = dynamic_cast<IntegerSetting*>(setting)) {
                                        SliderInt(*iSetting);
                                } else if (auto* fSetting = dynamic_cast<FloatSetting*>(setting)) {
                                        SliderFloat(*fSetting);
                                } else if (auto* sSetting = dynamic_cast<StringSetting*>(setting)) {
                                        InputText(*sSetting);
                                } else if (auto* fnSetting = dynamic_cast<FilenameSetting*>(setting)) {
                                        InputText(*fnSetting); // TODO
                                } else if (auto* kSetting = dynamic_cast<KeyCodeSetting*>(setting)) {
                                        InputText(*kSetting); // TODO
                                } else if (dynamic_cast<EnumSettingBase*>(setting)) {
                                        ComboBox(*setting);
                                } else if (auto* vSetting = dynamic_cast<VideoSourceSetting*>(setting)) {
                                        ComboBox(*vSetting);
                                } else {
                                        assert(false);
                                }
                        }
                        if (!Version::RELEASE) {
                                ImGui::Separator();
                                ImGui::Checkbox("ImGui Demo Window", &showDemoWindow);
                                HelpMarker("Show the ImGui demo window.\n"
                                        "This is purely to demonstrate the ImGui capabilities.\n"
                                        "There is no connection with any openMSX functionality.");
                        }
                });
        });
        if (showDemoWindow) {
                ImGui::ShowDemoWindow(&showDemoWindow);
        }
 
        const auto confirmTitle = "Confirm##settings";
        if (openConfirmPopup) {
                ImGui::OpenPopup(confirmTitle);
        }
        im::PopupModal(confirmTitle, nullptr, ImGuiWindowFlags_AlwaysAutoResize, [&]{
                ImGui::TextUnformatted(confirmText);
 
                bool close = false;
                if (ImGui::Button("Ok")) {
                        confirmAction();
                        close = true;
                }
                ImGui::SameLine();
                close |= ImGui::Button("Cancel");
                if (close) {
                        ImGui::CloseCurrentPopup();
                        confirmAction = {};
                }
        });
}
 
 
// joystick is 0..3
[[nodiscard]] static std::string settingName(unsigned joystick)
{
        return (joystick < 2) ? strCat("msxjoystick", joystick + 1, "_config")
                              : strCat("joymega", joystick - 1, "_config");
}
 
// joystick is 0..3
[[nodiscard]] static std::string joystickToGuiString(unsigned joystick)
{
        return (joystick < 2) ? strCat("MSX joystick ", joystick + 1)
                              : strCat("JoyMega controller ", joystick - 1);
}
 
[[nodiscard]] static std::string toGuiString(const BooleanInput& input, const JoystickManager& joystickManager)
{
        return std::visit(overloaded{
                [](const BooleanKeyboard& k) {
                        return strCat("keyboard key ", SDLKey::toString(k.getKeyCode()));
                },
                [](const BooleanMouseButton& m) {
                        return strCat("mouse button ", m.getButton());
                },
                [&](const BooleanJoystickButton& j) {
                        return strCat(joystickManager.getDisplayName(j.getJoystick()), " button ", j.getButton());
                },
                [&](const BooleanJoystickHat& h) {
                        return strCat(joystickManager.getDisplayName(h.getJoystick()), " D-pad ", h.getHat(), ' ', toString(h.getValue()));
                },
                [&](const BooleanJoystickAxis& a) {
                        return strCat(joystickManager.getDisplayName(a.getJoystick()),
                                      " stick axis ", a.getAxis(), ", ",
                                      (a.getDirection() == BooleanJoystickAxis::Direction::POS ? "positive" : "negative"), " direction");
                }
        }, input);
}
 
[[nodiscard]] static bool insideCircle(gl::vec2 mouse, gl::vec2 center, float radius)
{
        auto delta = center - mouse;
        return gl::sum(delta * delta) <= (radius * radius);
}
[[nodiscard]] static bool between(float x, float min, float max)
{
        return (min <= x) && (x <= max);
}
 
struct Rectangle {
        gl::vec2 topLeft;
        gl::vec2 bottomRight;
};
[[nodiscard]] static bool insideRectangle(gl::vec2 mouse, Rectangle r)
{
        return between(mouse.x, r.topLeft.x, r.bottomRight.x) &&
               between(mouse.y, r.topLeft.y, r.bottomRight.y);
}
 
 
static constexpr auto fractionDPad = 1.0f / 3.0f;
static constexpr auto thickness = 3.0f;
 
static void drawDPad(gl::vec2 center, float size, std::span<const uint8_t, 4> hovered, int hoveredRow)
{
        const auto F = fractionDPad;
        std::array<std::array<ImVec2, 5 + 1>, 4> points = {
                std::array<ImVec2, 5 + 1>{ // UP
                        center + size * gl::vec2{ 0,  0},
                        center + size * gl::vec2{-F, -F},
                        center + size * gl::vec2{-F, -1},
                        center + size * gl::vec2{ F, -1},
                        center + size * gl::vec2{ F, -F},
                        center + size * gl::vec2{ 0,  0},
                },
                std::array<ImVec2, 5 + 1>{ // DOWN
                        center + size * gl::vec2{ 0,  0},
                        center + size * gl::vec2{ F,  F},
                        center + size * gl::vec2{ F,  1},
                        center + size * gl::vec2{-F,  1},
                        center + size * gl::vec2{-F,  F},
                        center + size * gl::vec2{ 0,  0},
                },
                std::array<ImVec2, 5 + 1>{ // LEFT
                        center + size * gl::vec2{ 0,  0},
                        center + size * gl::vec2{-F,  F},
                        center + size * gl::vec2{-1,  F},
                        center + size * gl::vec2{-1, -F},
                        center + size * gl::vec2{-F, -F},
                        center + size * gl::vec2{ 0,  0},
                },
                std::array<ImVec2, 5 + 1>{ // RIGHT
                        center + size * gl::vec2{ 0,  0},
                        center + size * gl::vec2{ F, -F},
                        center + size * gl::vec2{ 1, -F},
                        center + size * gl::vec2{ 1,  F},
                        center + size * gl::vec2{ F,  F},
                        center + size * gl::vec2{ 0,  0},
                },
        };
 
        auto* drawList = ImGui::GetWindowDrawList();
        auto hoverColor = ImGui::GetColorU32(ImGuiCol_ButtonHovered);
 
        auto color = getColor(imColor::TEXT);
        for (auto i : xrange(4)) {
                if (hovered[i] || (hoveredRow == i)) {
                        drawList->AddConvexPolyFilled(points[i].data(), 5, hoverColor);
                }
                drawList->AddPolyline(points[i].data(), 5 + 1, color, 0, thickness);
        }
}
 
static void drawFilledCircle(gl::vec2 center, float radius, bool fill)
{
        auto* drawList = ImGui::GetWindowDrawList();
        if (fill) {
                auto hoverColor = ImGui::GetColorU32(ImGuiCol_ButtonHovered);
                drawList->AddCircleFilled(center, radius, hoverColor);
        }
        auto color = getColor(imColor::TEXT);
        drawList->AddCircle(center, radius, color, 0, thickness);
}
static void drawFilledRectangle(Rectangle r, float corner, bool fill)
{
        auto* drawList = ImGui::GetWindowDrawList();
        if (fill) {
                auto hoverColor = ImGui::GetColorU32(ImGuiCol_ButtonHovered);
                drawList->AddRectFilled(r.topLeft, r.bottomRight, hoverColor, corner);
        }
        auto color = getColor(imColor::TEXT);
        drawList->AddRect(r.topLeft, r.bottomRight, color, corner, 0, thickness);
}
 
static void drawLetterA(gl::vec2 center)
{
        auto* drawList = ImGui::GetWindowDrawList();
        auto tr = [&](gl::vec2 p) { return center + p; };
        const std::array<ImVec2, 3> lines = { tr({-6, 7}), tr({0, -7}), tr({6, 7}) };
        auto color = getColor(imColor::TEXT);
        drawList->AddPolyline(lines.data(), lines.size(), color, 0, thickness);
        drawList->AddLine(tr({-3, 1}), tr({3, 1}), color, thickness);
}
static void drawLetterB(gl::vec2 center)
{
        auto* drawList = ImGui::GetWindowDrawList();
        auto tr = [&](gl::vec2 p) { return center + p; };
        const std::array<ImVec2, 4> lines = { tr({1, -7}), tr({-4, -7}), tr({-4, 7}), tr({2, 7}) };
        auto color = getColor(imColor::TEXT);
        drawList->AddPolyline(lines.data(), lines.size(), color, 0, thickness);
        drawList->AddLine(tr({-4, -1}), tr({2, -1}), color, thickness);
        drawList->AddBezierQuadratic(tr({1, -7}), tr({4, -7}), tr({4, -4}), color, thickness);
        drawList->AddBezierQuadratic(tr({4, -4}), tr({4, -1}), tr({1, -1}), color, thickness);
        drawList->AddBezierQuadratic(tr({2, -1}), tr({6, -1}), tr({6,  3}), color, thickness);
        drawList->AddBezierQuadratic(tr({6,  3}), tr({6,  7}), tr({2,  7}), color, thickness);
}
static void drawLetterC(gl::vec2 center)
{
        auto* drawList = ImGui::GetWindowDrawList();
        auto tr = [&](gl::vec2 p) { return center + p; };
        auto color = getColor(imColor::TEXT);
        drawList->AddBezierCubic(tr({5, -5}), tr({-8, -16}), tr({-8, 16}), tr({5, 5}), color, thickness);
}
static void drawLetterX(gl::vec2 center)
{
        auto* drawList = ImGui::GetWindowDrawList();
        auto tr = [&](gl::vec2 p) { return center + p; };
        auto color = getColor(imColor::TEXT);
        drawList->AddLine(tr({-4, -6}), tr({4,  6}), color, thickness);
        drawList->AddLine(tr({-4,  6}), tr({4, -6}), color, thickness);
}
static void drawLetterY(gl::vec2 center)
{
        auto* drawList = ImGui::GetWindowDrawList();
        auto tr = [&](gl::vec2 p) { return center + p; };
        auto color = getColor(imColor::TEXT);
        drawList->AddLine(tr({-4, -6}), tr({0,  0}), color, thickness);
        drawList->AddLine(tr({-4,  6}), tr({4, -6}), color, thickness);
}
static void drawLetterZ(gl::vec2 center)
{
        auto* drawList = ImGui::GetWindowDrawList();
        auto tr = [&](gl::vec2 p) { return center + p; };
        const std::array<ImVec2, 4> linesZ2 = { tr({-4, -6}), tr({4, -6}), tr({-4, 6}), tr({4, 6}) };
        auto color = getColor(imColor::TEXT);
        drawList->AddPolyline(linesZ2.data(), 4, color, 0, thickness);
}
 
namespace msxjoystick {
 
enum {UP, DOWN, LEFT, RIGHT, TRIG_A, TRIG_B, NUM_BUTTONS, NUM_DIRECTIONS = TRIG_A};
 
static constexpr std::array<zstring_view, NUM_BUTTONS> buttonNames = {
        "Up", "Down", "Left", "Right", "A", "B" // show in the GUI
};
static constexpr std::array<zstring_view, NUM_BUTTONS> keyNames = {
        "UP", "DOWN", "LEFT", "RIGHT", "A", "B" // keys in Tcl dict
};
 
// Customize joystick look
static constexpr auto boundingBox = gl::vec2{300.0f, 100.0f};
static constexpr auto radius = 20.0f;
static constexpr auto corner = 10.0f;
static constexpr auto centerA = gl::vec2{200.0f, 50.0f};
static constexpr auto centerB = gl::vec2{260.0f, 50.0f};
static constexpr auto centerDPad = gl::vec2{50.0f, 50.0f};
static constexpr auto sizeDPad = 30.0f;
 
[[nodiscard]] static std::vector<uint8_t> buttonsHovered(gl::vec2 mouse)
{
        std::vector<uint8_t> result(NUM_BUTTONS); // false
        auto mouseDPad = (mouse - centerDPad) * (1.0f / sizeDPad);
        if (insideRectangle(mouseDPad, Rectangle{{-1, -1}, {1, 1}}) &&
                (between(mouseDPad.x, -fractionDPad, fractionDPad) ||
                between(mouseDPad.y, -fractionDPad, fractionDPad))) { // mouse over d-pad
                bool t1 = mouseDPad.x <  mouseDPad.y;
                bool t2 = mouseDPad.x < -mouseDPad.y;
                result[UP]    = !t1 &&  t2;
                result[DOWN]  =  t1 && !t2;
                result[LEFT]  =  t1 &&  t2;
                result[RIGHT] = !t1 && !t2;
        }
        result[TRIG_A] = insideCircle(mouse, centerA, radius);
        result[TRIG_B] = insideCircle(mouse, centerB, radius);
        return result;
}
 
static void draw(gl::vec2 scrnPos, std::span<uint8_t> hovered, int hoveredRow)
{
        auto* drawList = ImGui::GetWindowDrawList();
 
        auto color = getColor(imColor::TEXT);
        drawList->AddRect(scrnPos, scrnPos + boundingBox, color, corner, 0, thickness);
 
        drawDPad(scrnPos + centerDPad, sizeDPad, subspan<4>(hovered), hoveredRow);
 
        auto scrnCenterA = scrnPos + centerA;
        drawFilledCircle(scrnCenterA, radius, hovered[TRIG_A] || (hoveredRow == TRIG_A));
        drawLetterA(scrnCenterA);
 
        auto scrnCenterB = scrnPos + centerB;
        drawFilledCircle(scrnCenterB, radius, hovered[TRIG_B] || (hoveredRow == TRIG_B));
        drawLetterB(scrnCenterB);
}
 
} // namespace msxjoystick
 
namespace joymega {
 
enum {UP, DOWN, LEFT, RIGHT,
      TRIG_A, TRIG_B, TRIG_C,
      TRIG_X, TRIG_Y, TRIG_Z,
      TRIG_SELECT, TRIG_START,
      NUM_BUTTONS, NUM_DIRECTIONS = TRIG_A};
 
static constexpr std::array<zstring_view, NUM_BUTTONS> buttonNames = { // show in the GUI
        "Up", "Down", "Left", "Right",
        "A", "B", "C",
        "X", "Y", "Z",
        "Select", "Start",
};
static constexpr std::array<zstring_view, NUM_BUTTONS> keyNames = { // keys in Tcl dict
        "UP", "DOWN", "LEFT", "RIGHT",
        "A", "B", "C",
        "X", "Y", "Z",
        "SELECT", "START",
};
 
// Customize joystick look
static constexpr auto thickness = 3.0f;
static constexpr auto boundingBox = gl::vec2{300.0f, 158.0f};
static constexpr auto centerA = gl::vec2{205.0f, 109.9f};
static constexpr auto centerB = gl::vec2{235.9f,  93.5f};
static constexpr auto centerC = gl::vec2{269.7f,  83.9f};
static constexpr auto centerX = gl::vec2{194.8f,  75.2f};
static constexpr auto centerY = gl::vec2{223.0f,  61.3f};
static constexpr auto centerZ = gl::vec2{252.2f,  52.9f};
static constexpr auto selectBox = Rectangle{gl::vec2{130.0f, 60.0f}, gl::vec2{160.0f, 70.0f}};
static constexpr auto startBox  = Rectangle{gl::vec2{130.0f, 86.0f}, gl::vec2{160.0f, 96.0f}};
static constexpr auto radiusABC = 16.2f;
static constexpr auto radiusXYZ = 12.2f;
static constexpr auto centerDPad = gl::vec2{65.6f, 82.7f};
static constexpr auto sizeDPad = 34.0f;
static constexpr auto fractionDPad = 1.0f / 3.0f;
 
[[nodiscard]] static std::vector<uint8_t> buttonsHovered(gl::vec2 mouse)
{
        std::vector<uint8_t> result(NUM_BUTTONS); // false
        auto mouseDPad = (mouse - centerDPad) * (1.0f / sizeDPad);
        if (insideRectangle(mouseDPad, Rectangle{{-1, -1}, {1, 1}}) &&
                (between(mouseDPad.x, -fractionDPad, fractionDPad) ||
                between(mouseDPad.y, -fractionDPad, fractionDPad))) { // mouse over d-pad
                bool t1 = mouseDPad.x <  mouseDPad.y;
                bool t2 = mouseDPad.x < -mouseDPad.y;
                result[UP]    = !t1 &&  t2;
                result[DOWN]  =  t1 && !t2;
                result[LEFT]  =  t1 &&  t2;
                result[RIGHT] = !t1 && !t2;
        }
        result[TRIG_A] = insideCircle(mouse, centerA, radiusABC);
        result[TRIG_B] = insideCircle(mouse, centerB, radiusABC);
        result[TRIG_C] = insideCircle(mouse, centerC, radiusABC);
        result[TRIG_X] = insideCircle(mouse, centerX, radiusXYZ);
        result[TRIG_Y] = insideCircle(mouse, centerY, radiusXYZ);
        result[TRIG_Z] = insideCircle(mouse, centerZ, radiusXYZ);
        result[TRIG_START]  = insideRectangle(mouse, startBox);
        result[TRIG_SELECT] = insideRectangle(mouse, selectBox);
        return result;
}
 
static void draw(gl::vec2 scrnPos, std::span<uint8_t> hovered, int hoveredRow)
{
        auto* drawList = ImGui::GetWindowDrawList();
        auto tr = [&](gl::vec2 p) { return scrnPos + p; };
        auto color = getColor(imColor::TEXT);
 
        auto drawBezierCurve = [&](std::span<const gl::vec2> points, float thick = 1.0f) {
                assert((points.size() % 2) == 0);
                for (size_t i = 0; i < points.size() - 2; i += 2) {
                        auto ap = points[i + 0];
                        auto ad = points[i + 1];
                        auto bp = points[i + 2];
                        auto bd = points[i + 3];
                        drawList->AddBezierCubic(tr(ap), tr(ap + ad), tr(bp - bd), tr(bp), color, thick);
                }
        };
 
        std::array outLine = {
                gl::vec2{150.0f,   0.0f}, gl::vec2{ 23.1f,   0.0f},
                gl::vec2{258.3f,  30.3f}, gl::vec2{ 36.3f,  26.4f},
                gl::vec2{300.0f, 107.0f}, gl::vec2{  0.0f,  13.2f},
                gl::vec2{285.2f, 145.1f}, gl::vec2{ -9.9f,   9.9f},
                gl::vec2{255.3f, 157.4f}, gl::vec2{ -9.0f,   0.0f},
                gl::vec2{206.0f, 141.8f}, gl::vec2{-16.2f,  -5.6f},
                gl::vec2{150.0f, 131.9f}, gl::vec2{-16.5f,   0.0f},
                gl::vec2{ 94.0f, 141.8f}, gl::vec2{-16.2f,   5.6f},
                gl::vec2{ 44.7f, 157.4f}, gl::vec2{ -9.0f,   0.0f},
                gl::vec2{ 14.8f, 145.1f}, gl::vec2{ -9.9f,  -9.9f},
                gl::vec2{  0.0f, 107.0f}, gl::vec2{  0.0f, -13.2f},
                gl::vec2{ 41.7f,  30.3f}, gl::vec2{ 36.3f, -26.4f},
                gl::vec2{150.0f,   0.0f}, gl::vec2{ 23.1f,   0.0f}, // closed loop
        };
        drawBezierCurve(outLine, thickness);
 
        drawDPad(tr(centerDPad), sizeDPad, subspan<4>(hovered), hoveredRow);
        drawList->AddCircle(tr(centerDPad), 43.0f, color);
        std::array dPadCurve = {
                gl::vec2{77.0f,  33.0f}, gl::vec2{ 69.2f, 0.0f},
                gl::vec2{54.8f, 135.2f}, gl::vec2{-66.9f, 0.0f},
                gl::vec2{77.0f,  33.0f}, gl::vec2{ 69.2f, 0.0f},
        };
        drawBezierCurve(dPadCurve);
 
        drawFilledCircle(tr(centerA), radiusABC, hovered[TRIG_A] || (hoveredRow == TRIG_A));
        drawLetterA(tr(centerA));
        drawFilledCircle(tr(centerB), radiusABC, hovered[TRIG_B] || (hoveredRow == TRIG_B));
        drawLetterB(tr(centerB));
        drawFilledCircle(tr(centerC), radiusABC, hovered[TRIG_C] || (hoveredRow == TRIG_C));
        drawLetterC(tr(centerC));
        drawFilledCircle(tr(centerX), radiusXYZ, hovered[TRIG_X] || (hoveredRow == TRIG_X));
        drawLetterX(tr(centerX));
        drawFilledCircle(tr(centerY), radiusXYZ, hovered[TRIG_Y] || (hoveredRow == TRIG_Y));
        drawLetterY(tr(centerY));
        drawFilledCircle(tr(centerZ), radiusXYZ, hovered[TRIG_Z] || (hoveredRow == TRIG_Z));
        drawLetterZ(tr(centerZ));
        std::array buttonCurve = {
                gl::vec2{221.1f,  28.9f}, gl::vec2{ 80.1f, 0.0f},
                gl::vec2{236.9f, 139.5f}, gl::vec2{-76.8f, 0.0f},
                gl::vec2{221.1f,  28.9f}, gl::vec2{ 80.1f, 0.0f},
        };
        drawBezierCurve(buttonCurve);
 
        auto corner = (selectBox.bottomRight.y - selectBox.topLeft.y) * 0.5f;
        auto trR = [&](Rectangle r) { return Rectangle{tr(r.topLeft), tr(r.bottomRight)}; };
        drawFilledRectangle(trR(selectBox), corner, hovered[TRIG_SELECT] || (hoveredRow == TRIG_SELECT));
        drawList->AddText(ImGui::GetFont(), ImGui::GetFontSize(), tr({123.0f, 46.0f}), color, "Select");
        drawFilledRectangle(trR(startBox), corner, hovered[TRIG_START] || (hoveredRow == TRIG_START));
        drawList->AddText(ImGui::GetFont(), ImGui::GetFontSize(), tr({128.0f, 97.0f}), color, "Start");
}
 
} // namespace joymega
 
void ImGuiSettings::paintJoystick(MSXMotherBoard& motherBoard)
{
        ImGui::SetNextWindowSize(gl::vec2{316, 323}, ImGuiCond_FirstUseEver);
        im::Window("Configure MSX joysticks", &showConfigureJoystick, [&]{
                ImGui::SetNextItemWidth(13.0f * ImGui::GetFontSize());
                im::Combo("Select joystick", joystickToGuiString(joystick).c_str(), [&]{
                        for (const auto& j : xrange(4)) {
                                if (ImGui::Selectable(joystickToGuiString(j).c_str())) {
                                        joystick = j;
                                }
                        }
                });
 
                const auto& joystickManager = manager.getReactor().getInputEventGenerator().getJoystickManager();
                const auto& controller = motherBoard.getMSXCommandController();
                auto* setting = dynamic_cast<StringSetting*>(controller.findSetting(settingName(joystick)));
                if (!setting) return;
                auto& interp = setting->getInterpreter();
                TclObject bindings = setting->getValue();
 
                gl::vec2 scrnPos = ImGui::GetCursorScreenPos();
                gl::vec2 mouse = gl::vec2(ImGui::GetIO().MousePos) - scrnPos;
 
                // Check if buttons are hovered
                bool msxOrMega = joystick < 2;
                auto hovered = msxOrMega ? msxjoystick::buttonsHovered(mouse)
                                         : joymega    ::buttonsHovered(mouse);
                const auto numButtons = hovered.size();
                using SP = std::span<const zstring_view>;
                auto keyNames = msxOrMega ? SP{msxjoystick::keyNames}
                                          : SP{joymega    ::keyNames};
                auto buttonNames = msxOrMega ? SP{msxjoystick::buttonNames}
                                             : SP{joymega    ::buttonNames};
 
                // Any joystick button clicked?
                std::optional<int> addAction;
                std::optional<int> removeAction;
                if (ImGui::IsMouseReleased(ImGuiMouseButton_Left)) {
                        for (auto i : xrange(numButtons)) {
                                if (hovered[i]) addAction = narrow<int>(i);
                        }
                }
 
                ImGui::Dummy(msxOrMega ? msxjoystick::boundingBox : joymega::boundingBox); // reserve space for joystick drawing
 
                // Draw table
                int hoveredRow = -1;
                const auto& style = ImGui::GetStyle();
                auto textHeight = ImGui::GetTextLineHeight();
                float rowHeight = 2.0f * style.FramePadding.y + textHeight;
                float bottomHeight = style.ItemSpacing.y + 2.0f * style.FramePadding.y + textHeight;
                im::Table("##joystick-table", 2, ImGuiTableFlags_SizingFixedFit | ImGuiTableFlags_ScrollX, {0.0f, -bottomHeight}, [&]{
                        im::ID_for_range(numButtons, [&](int i) {
                                TclObject key(keyNames[i]);
                                TclObject bindingList = bindings.getDictValue(interp, key);
                                if (ImGui::TableNextColumn()) {
                                        auto pos = ImGui::GetCursorPos();
                                        ImGui::Selectable("##row", hovered[i], ImGuiSelectableFlags_SpanAllColumns | ImGuiSelectableFlags_AllowOverlap, ImVec2(0, rowHeight));
                                        if (ImGui::IsItemHovered()) {
                                                hoveredRow = i;
                                        }
 
                                        ImGui::SetCursorPos(pos);
                                        ImGui::AlignTextToFramePadding();
                                        ImGui::TextUnformatted(buttonNames[i]);
                                }
                                if (ImGui::TableNextColumn()) {
                                        if (ImGui::Button("Add")) {
                                                addAction = i;
                                        }
                                        ImGui::SameLine();
                                        auto numBindings = bindingList.size();
                                        im::Disabled(numBindings == 0, [&]{
                                                if (ImGui::Button("Remove")) {
                                                        if (numBindings == 1) {
                                                                bindings.setDictValue(interp, key, TclObject{});
                                                                setting->setValue(bindings);
                                                        } else {
                                                                removeAction = i;
                                                        }
                                                }
                                        });
                                        ImGui::SameLine();
                                        if (numBindings == 0) {
                                                ImGui::TextDisabled("no bindings");
                                        } else {
                                                size_t lastBindingIndex = numBindings - 1;
                                                size_t bindingIndex = 0;
                                                for (auto binding: bindingList) {
                                                        ImGui::TextUnformatted(binding);
                                                        simpleToolTip(toGuiString(*parseBooleanInput(binding), joystickManager));
                                                        if (bindingIndex < lastBindingIndex) {
                                                                ImGui::SameLine();
                                                                ImGui::TextUnformatted("|"sv);
                                                                ImGui::SameLine();
                                                        }
                                                        ++bindingIndex;
                                                }
                                        }
                                }
                        });
                });
                msxOrMega ? msxjoystick::draw(scrnPos, hovered, hoveredRow)
                          : joymega    ::draw(scrnPos, hovered, hoveredRow);
 
                if (ImGui::Button("Default bindings...")) {
                        ImGui::OpenPopup("bindings");
                }
                im::Popup("bindings", [&]{
                        auto addOrSet = [&](auto getBindings) {
                                if (ImGui::MenuItem("Add to current bindings")) {
                                        // merge 'newBindings' into 'bindings'
                                        auto newBindings = getBindings();
                                        for (auto k : xrange(int(numButtons))) {
                                                TclObject key(keyNames[k]);
                                                TclObject dstList = bindings.getDictValue(interp, key);
                                                TclObject srcList = newBindings.getDictValue(interp, key);
                                                // This is O(N^2), but that's fine (here).
                                                for (auto b : srcList) {
                                                        if (!contains(dstList, b)) {
                                                                dstList.addListElement(b);
                                                        }
                                                }
                                                bindings.setDictValue(interp, key, dstList);
                                        }
                                        setting->setValue(bindings);
                                }
                                if (ImGui::MenuItem("Replace current bindings")) {
                                        setting->setValue(getBindings());
                                }
                        };
                        im::Menu("Keyboard", [&]{
                                addOrSet([] {
                                        return TclObject(TclObject::MakeDictTag{},
                                                "UP",    makeTclList("keyb Up"),
                                                "DOWN",  makeTclList("keyb Down"),
                                                "LEFT",  makeTclList("keyb Left"),
                                                "RIGHT", makeTclList("keyb Right"),
                                                "A",     makeTclList("keyb Space"),
                                                "B",     makeTclList("keyb M"));
                                });
                        });
                        for (auto joyId : joystickManager.getConnectedJoysticks()) {
                                im::Menu(joystickManager.getDisplayName(joyId).c_str(), [&]{
                                        addOrSet([&]{
                                                return msxOrMega
                                                        ? MSXJoystick::getDefaultConfig(joyId, joystickManager)
                                                        : JoyMega::getDefaultConfig(joyId, joystickManager);
                                        });
                                });
                        }
                });
 
                // Popup for 'Add'
                static constexpr auto addTitle = "Waiting for input";
                if (addAction) {
                        popupForKey = *addAction;
                        popupTimeout = 5.0f;
                        initListener();
                        ImGui::OpenPopup(addTitle);
                }
                im::PopupModal(addTitle, nullptr, ImGuiWindowFlags_NoSavedSettings, [&]{
                        auto close = [&]{
                                ImGui::CloseCurrentPopup();
                                popupForKey = unsigned(-1);
                                deinitListener();
                        };
                        if (popupForKey >= numButtons) {
                                close();
                                return;
                        }
 
                        ImGui::Text("Enter event for joystick button '%s'", buttonNames[popupForKey].c_str());
                        ImGui::Text("Or press ESC to cancel.  Timeout in %d seconds.", int(popupTimeout));
 
                        popupTimeout -= ImGui::GetIO().DeltaTime;
                        if (popupTimeout <= 0.0f) {
                                close();
                        }
                });
 
                // Popup for 'Remove'
                if (removeAction) {
                        popupForKey = *removeAction;
                        ImGui::OpenPopup("remove");
                }
                im::Popup("remove", [&]{
                        auto close = [&]{
                                ImGui::CloseCurrentPopup();
                                popupForKey = unsigned(-1);
                        };
                        if (popupForKey >= numButtons) {
                                close();
                                return;
                        }
                        TclObject key(keyNames[popupForKey]);
                        TclObject bindingList = bindings.getDictValue(interp, key);
 
                        unsigned remove = -1u;
                        unsigned counter = 0;
                        for (const auto& b : bindingList) {
                                if (ImGui::Selectable(b.c_str())) {
                                        remove = counter;
                                }
                                simpleToolTip(toGuiString(*parseBooleanInput(b), joystickManager));
                                ++counter;
                        }
                        if (remove != unsigned(-1)) {
                                bindingList.removeListIndex(interp, remove);
                                bindings.setDictValue(interp, key, bindingList);
                                setting->setValue(bindings);
                                close();
                        }
 
                        if (ImGui::Selectable("all bindings")) {
                                bindings.setDictValue(interp, key, TclObject{});
                                setting->setValue(bindings);
                                close();
                        }
                });
        });
}
 
void ImGuiSettings::paintFont()
{
        im::Window("Select font", &showFont, [&]{
                auto selectFilename = [&](FilenameSetting& setting, float width) {
                        auto display = [](std::string_view name) {
                                if (name.ends_with(".gz" )) name.remove_suffix(3);
                                if (name.ends_with(".ttf")) name.remove_suffix(4);
                                return std::string(name);
                        };
                        auto current = setting.getString();
                        ImGui::SetNextItemWidth(width);
                        im::Combo(tmpStrCat("##", setting.getBaseName()).c_str(), display(current).c_str(), [&]{
                                for (const auto& font : getAvailableFonts()) {
                                        if (ImGui::Selectable(display(font).c_str(), current == font)) {
                                                setting.setString(font);
                                        }
                                }
                        });
                };
                auto selectSize = [](IntegerSetting& setting) {
                        auto display = [](int s) { return strCat(s); };
                        auto current = setting.getInt();
                        ImGui::SetNextItemWidth(4.0f * ImGui::GetFontSize());
                        im::Combo(tmpStrCat("##", setting.getBaseName()).c_str(), display(current).c_str(), [&]{
                                for (int size : {9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 22, 24, 26, 28, 30, 32}) {
                                        if (ImGui::Selectable(display(size).c_str(), current == size)) {
                                                setting.setInt(size);
                                        }
                                }
                        });
                };
 
                auto pos = ImGui::CalcTextSize("Monospace").x + 2.0f * ImGui::GetStyle().ItemSpacing.x;
                auto width = 12.0f * ImGui::GetFontSize(); // filename ComboBox (boxes are drawn with different font, but we want same width)
 
                ImGui::AlignTextToFramePadding();
                ImGui::TextUnformatted("Normal");
                ImGui::SameLine(pos);
                selectFilename(manager.fontPropFilename, width);
                ImGui::SameLine();
                selectSize(manager.fontPropSize);
                HelpMarker("You can install more fonts by copying .ttf file(s) to your \"<openmsx>/share/skins\" directory.");
 
                ImGui::AlignTextToFramePadding();
                ImGui::TextUnformatted("Monospace");
                ImGui::SameLine(pos);
                im::Font(manager.fontMono, [&]{
                        selectFilename(manager.fontMonoFilename, width);
                });
                ImGui::SameLine();
                selectSize(manager.fontMonoSize);
                HelpMarker("Some GUI elements (e.g. the console) require a monospaced font.");
        });
}
 
[[nodiscard]] static std::string formatShortcutWithAnnotations(const Shortcuts::Shortcut& shortcut)
{
        auto result = getKeyChordName(shortcut.keyChord);
        // don't show the 'ALWAYS_xxx' values
        if (shortcut.type == Shortcuts::Type::GLOBAL) result += ", global";
        return result;
}
 
[[nodiscard]] static gl::vec2 buttonSize(std::string_view text, float defaultSize_)
{
        const auto& style = ImGui::GetStyle();
        auto textSize = ImGui::CalcTextSize(text).x + 2.0f * style.FramePadding.x;
        auto defaultSize = ImGui::GetFontSize() * defaultSize_;
        return {std::max(textSize, defaultSize), 0.0f};
}
 
void ImGuiSettings::paintEditShortcut()
{
        using enum Shortcuts::Type;
 
        bool editShortcutWindow = editShortcutId != Shortcuts::ID::INVALID;
        if (!editShortcutWindow) return;
 
        im::Window("Edit shortcut", &editShortcutWindow, ImGuiWindowFlags_AlwaysAutoResize, [&]{
                auto& shortcuts = manager.getShortcuts();
                auto shortcut = shortcuts.getShortcut(editShortcutId);
 
                im::Table("table", 2, [&]{
                        ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthFixed);
                        ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthStretch);
 
                        if (ImGui::TableNextColumn()) {
                                ImGui::AlignTextToFramePadding();
                                ImGui::TextUnformatted("key");
                        }
                        static constexpr auto waitKeyTitle = "Waiting for key";
                        if (ImGui::TableNextColumn()) {
                                auto text = getKeyChordName(shortcut.keyChord);
                                if (ImGui::Button(text.c_str(), buttonSize(text, 4.0f))) {
                                        popupTimeout = 10.0f;
                                        centerNextWindowOverCurrent();
                                        ImGui::OpenPopup(waitKeyTitle);
                                }
                        }
                        bool isOpen = true;
                        im::PopupModal(waitKeyTitle, &isOpen, ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_AlwaysAutoResize, [&]{
                                ImGui::Text("Enter key combination for shortcut '%s'",
                                        Shortcuts::getShortcutDescription(editShortcutId).c_str());
                                ImGui::Text("Timeout in %d seconds.", int(popupTimeout));
 
                                popupTimeout -= ImGui::GetIO().DeltaTime;
                                if (!isOpen || popupTimeout <= 0.0f) {
                                        ImGui::CloseCurrentPopup();
                                }
                                if (auto keyChord = getCurrentlyPressedKeyChord(); keyChord != ImGuiKey_None) {
                                        shortcut.keyChord = keyChord;
                                        shortcuts.setShortcut(editShortcutId, shortcut);
                                        editShortcutWindow = false;
                                        ImGui::CloseCurrentPopup();
                                }
                        });
 
                        if (shortcut.type == one_of(LOCAL, GLOBAL)) { // don't edit the 'ALWAYS_xxx' values
                                if (ImGui::TableNextColumn()) {
                                        ImGui::AlignTextToFramePadding();
                                        ImGui::TextUnformatted("global");
                                }
                                if (ImGui::TableNextColumn()) {
                                        bool global = shortcut.type == GLOBAL;
                                        if (ImGui::Checkbox("##global", &global)) {
                                                shortcut.type = global ? GLOBAL : LOCAL;
                                                shortcuts.setShortcut(editShortcutId, shortcut);
                                        }
                                        simpleToolTip(
                                                "Global shortcuts react when any GUI window has focus.\n"
                                                "Local shortcuts only react when the specific GUI window has focus.\n"sv);
                                }
                        }
                });
                ImGui::Separator();
                const auto& defaultShortcut = Shortcuts::getDefaultShortcut(editShortcutId);
                im::Disabled(shortcut == defaultShortcut, [&]{
                        if (ImGui::Button("Restore default")) {
                                shortcuts.setShortcut(editShortcutId, defaultShortcut);
                                editShortcutWindow = false;
                        }
                        simpleToolTip([&]{ return formatShortcutWithAnnotations(defaultShortcut); });
                });
 
                ImGui::SameLine();
                im::Disabled(shortcut == Shortcuts::Shortcut{}, [&]{
                        if (ImGui::Button("Set None")) {
                                shortcuts.setShortcut(editShortcutId, Shortcuts::Shortcut{});
                                editShortcutWindow = false;
                        }
                        simpleToolTip("Set no binding for this shortcut"sv);
                });
        });
        if (!editShortcutWindow) editShortcutId = Shortcuts::ID::INVALID;
}
 
void ImGuiSettings::paintShortcut()
{
        im::Window("Edit shortcuts", &showShortcut, [&]{
                int flags = ImGuiTableFlags_Resizable
                          | ImGuiTableFlags_RowBg
                          | ImGuiTableFlags_NoBordersInBodyUntilResize
                          | ImGuiTableFlags_SizingStretchProp;
                im::Table("table", 2, flags, {-FLT_MIN, 0.0f}, [&]{
                        ImGui::TableSetupColumn("description");
                        ImGui::TableSetupColumn("key");
 
                        const auto& shortcuts = manager.getShortcuts();
                        im::ID_for_range(Shortcuts::ID::NUM_SHORTCUTS, [&](int i) {
                                auto id = static_cast<Shortcuts::ID>(i);
                                auto shortcut = shortcuts.getShortcut(id);
 
                                if (ImGui::TableNextColumn()) {
                                        ImGui::AlignTextToFramePadding();
                                        ImGui::TextUnformatted(Shortcuts::getShortcutDescription(id));
                                }
                                if (ImGui::TableNextColumn()) {
                                        auto text = formatShortcutWithAnnotations(shortcut);
                                        if (ImGui::Button(text.c_str(), buttonSize(text, 9.0f))) {
                                                editShortcutId = id;
                                                centerNextWindowOverCurrent();
                                        }
                                }
                        });
                });
        });
        paintEditShortcut();
}
 
void ImGuiSettings::paint(MSXMotherBoard* motherBoard)
{
        if (selectedStyle < 0) {
                // triggers when loading "imgui.ini" did not select a style
                selectedStyle = 0; // dark (also the default (recommended) Dear ImGui style)
                setStyle();
        }
        if (motherBoard && showConfigureJoystick) paintJoystick(*motherBoard);
        if (showFont) paintFont();
        if (showShortcut) paintShortcut();
}
 
std::span<const std::string> ImGuiSettings::getAvailableFonts()
{
        if (availableFonts.empty()) {
                for (const auto& context = systemFileContext();
                     const auto& path : context.getPaths()) {
                        foreach_file(FileOperations::join(path, "skins"), [&](const std::string& /*fullName*/, std::string_view name) {
                                if (name.ends_with(".ttf.gz") || name.ends_with(".ttf")) {
                                        availableFonts.emplace_back(name);
                                }
                        });
                }
                // sort and remove duplicates
                ranges::sort(availableFonts);
                availableFonts.erase(ranges::unique(availableFonts), end(availableFonts));
        }
        return availableFonts;
}
 
int ImGuiSettings::signalEvent(const Event& event)
{
        bool msxOrMega = joystick < 2;
        using SP = std::span<const zstring_view>;
        auto keyNames = msxOrMega ? SP{msxjoystick::keyNames}
                                  : SP{joymega    ::keyNames};
        if (const auto numButtons = keyNames.size(); popupForKey >= numButtons) {
                deinitListener();
                return 0; // don't block
        }
 
        static constexpr auto block = EventDistributor::Priority(EventDistributor::IMGUI + 1); // lower priority than this listener
 
        bool escape = false;
        if (const auto* keyDown = get_event_if<KeyDownEvent>(event)) {
                escape = keyDown->getKeyCode() == SDLK_ESCAPE;
        }
        if (!escape) {
                auto getJoyDeadZone = [&](JoystickId joyId) {
                        const auto& joyMan = manager.getReactor().getInputEventGenerator().getJoystickManager();
                        const auto* setting = joyMan.getJoyDeadZoneSetting(joyId);
                        return setting ? setting->getInt() : 0;
                };
                auto b = captureBooleanInput(event, getJoyDeadZone);
                if (!b) return block; // keep popup active
                auto bs = toString(*b);
 
                auto* motherBoard = manager.getReactor().getMotherBoard();
                if (!motherBoard) return block;
                const auto& controller = motherBoard->getMSXCommandController();
                auto* setting = dynamic_cast<StringSetting*>(controller.findSetting(settingName(joystick)));
                if (!setting) return block;
                auto& interp = setting->getInterpreter();
 
                TclObject bindings = setting->getValue();
                TclObject key(keyNames[popupForKey]);
                TclObject bindingList = bindings.getDictValue(interp, key);
 
                if (!contains(bindingList, bs)) {
                        bindingList.addListElement(bs);
                        bindings.setDictValue(interp, key, bindingList);
                        setting->setValue(bindings);
                }
        }
 
        popupForKey = unsigned(-1); // close popup
        return block; // block event
}
 
void ImGuiSettings::initListener()
{
        if (listening) return;
        listening = true;
 
        auto& distributor = manager.getReactor().getEventDistributor();
        // highest priority (higher than HOTKEY and IMGUI)
        using enum EventType;
        for (auto type : {KEY_DOWN, MOUSE_BUTTON_DOWN,
                          JOY_BUTTON_DOWN, JOY_HAT, JOY_AXIS_MOTION}) {
                distributor.registerEventListener(type, *this);
        }
}
 
void ImGuiSettings::deinitListener()
{
        if (!listening) return;
        listening = false;
 
        auto& distributor = manager.getReactor().getEventDistributor();
        using enum EventType;
        for (auto type : {JOY_AXIS_MOTION, JOY_HAT, JOY_BUTTON_DOWN,
                          MOUSE_BUTTON_DOWN, KEY_DOWN}) {
                distributor.unregisterEventListener(type, *this);
        }
}
 
} // namespace openmsx