Merge pull request #4597 from Morph1984/mjolnir-p2

Project Mjölnir: Part 2 - Controller Applet

src/yuzu/CMakeLists.txt

@@ -9,6 +9,9 @@ add_executable(yuzu
     about_dialog.cpp
     about_dialog.h
     aboutdialog.ui
+    applets/controller.cpp
+    applets/controller.h
+    applets/controller.ui
     applets/error.cpp
     applets/error.h
     applets/profile_select.cpp
@@ -62,12 +65,15 @@ add_executable(yuzu
     configuration/configure_input.cpp
     configuration/configure_input.h
     configuration/configure_input.ui
-    configuration/configure_input_player.cpp
-    configuration/configure_input_player.h
-    configuration/configure_input_player.ui
     configuration/configure_input_advanced.cpp
     configuration/configure_input_advanced.h
     configuration/configure_input_advanced.ui
+    configuration/configure_input_dialog.cpp
+    configuration/configure_input_dialog.h
+    configuration/configure_input_dialog.ui
+    configuration/configure_input_player.cpp
+    configuration/configure_input_player.h
+    configuration/configure_input_player.ui
     configuration/configure_motion_touch.cpp
     configuration/configure_motion_touch.h
     configuration/configure_motion_touch.ui

src/yuzu/applets/controller.cpp

@@ -0,0 +1,601 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+
+#include "common/assert.h"
+#include "common/string_util.h"
+#include "core/core.h"
+#include "core/hle/lock.h"
+#include "core/hle/service/hid/controllers/npad.h"
+#include "core/hle/service/hid/hid.h"
+#include "core/hle/service/sm/sm.h"
+#include "ui_controller.h"
+#include "yuzu/applets/controller.h"
+#include "yuzu/configuration/configure_input_dialog.h"
+#include "yuzu/main.h"
+
+namespace {
+
+constexpr std::array<std::array<bool, 4>, 8> led_patterns = {{
+    {1, 0, 0, 0},
+    {1, 1, 0, 0},
+    {1, 1, 1, 0},
+    {1, 1, 1, 1},
+    {1, 0, 0, 1},
+    {1, 0, 1, 0},
+    {1, 0, 1, 1},
+    {0, 1, 1, 0},
+}};
+
+void UpdateController(Settings::ControllerType controller_type, std::size_t npad_index,
+                      bool connected) {
+    Core::System& system{Core::System::GetInstance()};
+
+    if (!system.IsPoweredOn()) {
+        return;
+    }
+
+    Service::SM::ServiceManager& sm = system.ServiceManager();
+
+    auto& npad =
+        sm.GetService<Service::HID::Hid>("hid")
+            ->GetAppletResource()
+            ->GetController<Service::HID::Controller_NPad>(Service::HID::HidController::NPad);
+
+    npad.UpdateControllerAt(npad.MapSettingsTypeToNPad(controller_type), npad_index, connected);
+}
+
+// Returns true if the given controller type is compatible with the given parameters.
+bool IsControllerCompatible(Settings::ControllerType controller_type,
+                            Core::Frontend::ControllerParameters parameters) {
+    switch (controller_type) {
+    case Settings::ControllerType::ProController:
+        return parameters.allow_pro_controller;
+    case Settings::ControllerType::DualJoyconDetached:
+        return parameters.allow_dual_joycons;
+    case Settings::ControllerType::LeftJoycon:
+        return parameters.allow_left_joycon;
+    case Settings::ControllerType::RightJoycon:
+        return parameters.allow_right_joycon;
+    case Settings::ControllerType::Handheld:
+        return parameters.enable_single_mode && parameters.allow_handheld;
+    default:
+        return false;
+    }
+}
+
+/// Maps the controller type combobox index to Controller Type enum
+constexpr Settings::ControllerType GetControllerTypeFromIndex(int index) {
+    switch (index) {
+    case 0:
+    default:
+        return Settings::ControllerType::ProController;
+    case 1:
+        return Settings::ControllerType::DualJoyconDetached;
+    case 2:
+        return Settings::ControllerType::LeftJoycon;
+    case 3:
+        return Settings::ControllerType::RightJoycon;
+    case 4:
+        return Settings::ControllerType::Handheld;
+    }
+}
+
+/// Maps the Controller Type enum to controller type combobox index
+constexpr int GetIndexFromControllerType(Settings::ControllerType type) {
+    switch (type) {
+    case Settings::ControllerType::ProController:
+    default:
+        return 0;
+    case Settings::ControllerType::DualJoyconDetached:
+        return 1;
+    case Settings::ControllerType::LeftJoycon:
+        return 2;
+    case Settings::ControllerType::RightJoycon:
+        return 3;
+    case Settings::ControllerType::Handheld:
+        return 4;
+    }
+}
+
+} // namespace
+
+QtControllerSelectorDialog::QtControllerSelectorDialog(
+    QWidget* parent, Core::Frontend::ControllerParameters parameters_,
+    InputCommon::InputSubsystem* input_subsystem_)
+    : QDialog(parent), ui(std::make_unique<Ui::QtControllerSelectorDialog>()),
+      parameters(std::move(parameters_)), input_subsystem(input_subsystem_) {
+    ui->setupUi(this);
+
+    player_widgets = {
+        ui->widgetPlayer1, ui->widgetPlayer2, ui->widgetPlayer3, ui->widgetPlayer4,
+        ui->widgetPlayer5, ui->widgetPlayer6, ui->widgetPlayer7, ui->widgetPlayer8,
+    };
+
+    player_groupboxes = {
+        ui->groupPlayer1Connected, ui->groupPlayer2Connected, ui->groupPlayer3Connected,
+        ui->groupPlayer4Connected, ui->groupPlayer5Connected, ui->groupPlayer6Connected,
+        ui->groupPlayer7Connected, ui->groupPlayer8Connected,
+    };
+
+    connected_controller_icons = {
+        ui->controllerPlayer1, ui->controllerPlayer2, ui->controllerPlayer3, ui->controllerPlayer4,
+        ui->controllerPlayer5, ui->controllerPlayer6, ui->controllerPlayer7, ui->controllerPlayer8,
+    };
+
+    led_patterns_boxes = {{
+        {ui->checkboxPlayer1LED1, ui->checkboxPlayer1LED2, ui->checkboxPlayer1LED3,
+         ui->checkboxPlayer1LED4},
+        {ui->checkboxPlayer2LED1, ui->checkboxPlayer2LED2, ui->checkboxPlayer2LED3,
+         ui->checkboxPlayer2LED4},
+        {ui->checkboxPlayer3LED1, ui->checkboxPlayer3LED2, ui->checkboxPlayer3LED3,
+         ui->checkboxPlayer3LED4},
+        {ui->checkboxPlayer4LED1, ui->checkboxPlayer4LED2, ui->checkboxPlayer4LED3,
+         ui->checkboxPlayer4LED4},
+        {ui->checkboxPlayer5LED1, ui->checkboxPlayer5LED2, ui->checkboxPlayer5LED3,
+         ui->checkboxPlayer5LED4},
+        {ui->checkboxPlayer6LED1, ui->checkboxPlayer6LED2, ui->checkboxPlayer6LED3,
+         ui->checkboxPlayer6LED4},
+        {ui->checkboxPlayer7LED1, ui->checkboxPlayer7LED2, ui->checkboxPlayer7LED3,
+         ui->checkboxPlayer7LED4},
+        {ui->checkboxPlayer8LED1, ui->checkboxPlayer8LED2, ui->checkboxPlayer8LED3,
+         ui->checkboxPlayer8LED4},
+    }};
+
+    explain_text_labels = {
+        ui->labelPlayer1Explain, ui->labelPlayer2Explain, ui->labelPlayer3Explain,
+        ui->labelPlayer4Explain, ui->labelPlayer5Explain, ui->labelPlayer6Explain,
+        ui->labelPlayer7Explain, ui->labelPlayer8Explain,
+    };
+
+    emulated_controllers = {
+        ui->comboPlayer1Emulated, ui->comboPlayer2Emulated, ui->comboPlayer3Emulated,
+        ui->comboPlayer4Emulated, ui->comboPlayer5Emulated, ui->comboPlayer6Emulated,
+        ui->comboPlayer7Emulated, ui->comboPlayer8Emulated,
+    };
+
+    player_labels = {
+        ui->labelPlayer1, ui->labelPlayer2, ui->labelPlayer3, ui->labelPlayer4,
+        ui->labelPlayer5, ui->labelPlayer6, ui->labelPlayer7, ui->labelPlayer8,
+    };
+
+    connected_controller_labels = {
+        ui->labelConnectedPlayer1, ui->labelConnectedPlayer2, ui->labelConnectedPlayer3,
+        ui->labelConnectedPlayer4, ui->labelConnectedPlayer5, ui->labelConnectedPlayer6,
+        ui->labelConnectedPlayer7, ui->labelConnectedPlayer8,
+    };
+
+    connected_controller_checkboxes = {
+        ui->checkboxPlayer1Connected, ui->checkboxPlayer2Connected, ui->checkboxPlayer3Connected,
+        ui->checkboxPlayer4Connected, ui->checkboxPlayer5Connected, ui->checkboxPlayer6Connected,
+        ui->checkboxPlayer7Connected, ui->checkboxPlayer8Connected,
+    };
+
+    // Setup/load everything prior to setting up connections.
+    // This avoids unintentionally changing the states of elements while loading them in.
+    SetSupportedControllers();
+    DisableUnsupportedPlayers();
+    LoadConfiguration();
+
+    for (std::size_t i = 0; i < NUM_PLAYERS; ++i) {
+        SetExplainText(i);
+        UpdateControllerIcon(i);
+        UpdateLEDPattern(i);
+        UpdateBorderColor(i);
+
+        connect(player_groupboxes[i], &QGroupBox::toggled, [this, i](bool checked) {
+            if (checked) {
+                for (std::size_t index = 0; index <= i; ++index) {
+                    connected_controller_checkboxes[index]->setChecked(checked);
+                }
+            } else {
+                for (std::size_t index = i; index < NUM_PLAYERS; ++index) {
+                    connected_controller_checkboxes[index]->setChecked(checked);
+                }
+            }
+        });
+
+        connect(emulated_controllers[i], qOverload<int>(&QComboBox::currentIndexChanged),
+                [this, i](int) {
+                    UpdateControllerIcon(i);
+                    UpdateControllerState(i);
+                    UpdateLEDPattern(i);
+                    CheckIfParametersMet();
+                });
+
+        connect(connected_controller_checkboxes[i], &QCheckBox::stateChanged, [this, i](int state) {
+            player_groupboxes[i]->setChecked(state == Qt::Checked);
+            UpdateControllerIcon(i);
+            UpdateControllerState(i);
+            UpdateLEDPattern(i);
+            UpdateBorderColor(i);
+            CheckIfParametersMet();
+        });
+
+        if (i == 0) {
+            connect(emulated_controllers[i], qOverload<int>(&QComboBox::currentIndexChanged),
+                    [this](int index) {
+                        UpdateDockedState(GetControllerTypeFromIndex(index) ==
+                                          Settings::ControllerType::Handheld);
+                    });
+        }
+    }
+
+    connect(ui->inputConfigButton, &QPushButton::clicked, this,
+            &QtControllerSelectorDialog::CallConfigureInputDialog);
+
+    connect(ui->buttonBox, &QDialogButtonBox::accepted, this,
+            &QtControllerSelectorDialog::ApplyConfiguration);
+
+    // If keep_controllers_connected is false, forcefully disconnect all controllers
+    if (!parameters.keep_controllers_connected) {
+        for (auto player : player_groupboxes) {
+            player->setChecked(false);
+        }
+    }
+
+    CheckIfParametersMet();
+
+    resize(0, 0);
+}
+
+QtControllerSelectorDialog::~QtControllerSelectorDialog() = default;
+
+void QtControllerSelectorDialog::ApplyConfiguration() {
+    // Update the controller state once more, just to be sure they are properly applied.
+    for (std::size_t index = 0; index < NUM_PLAYERS; ++index) {
+        UpdateControllerState(index);
+    }
+
+    const bool pre_docked_mode = Settings::values.use_docked_mode;
+    Settings::values.use_docked_mode = ui->radioDocked->isChecked();
+    OnDockedModeChanged(pre_docked_mode, Settings::values.use_docked_mode);
+
+    Settings::values.vibration_enabled = ui->vibrationGroup->isChecked();
+}
+
+void QtControllerSelectorDialog::LoadConfiguration() {
+    for (std::size_t index = 0; index < NUM_PLAYERS; ++index) {
+        const auto connected = Settings::values.players[index].connected ||
+                               (index == 0 && Settings::values.players[8].connected);
+        player_groupboxes[index]->setChecked(connected);
+        connected_controller_checkboxes[index]->setChecked(connected);
+        emulated_controllers[index]->setCurrentIndex(
+            GetIndexFromControllerType(Settings::values.players[index].controller_type));
+    }
+
+    UpdateDockedState(Settings::values.players[8].connected);
+
+    ui->vibrationGroup->setChecked(Settings::values.vibration_enabled);
+}
+
+void QtControllerSelectorDialog::CallConfigureInputDialog() {
+    const auto max_supported_players = parameters.enable_single_mode ? 1 : parameters.max_players;
+
+    ConfigureInputDialog dialog(this, max_supported_players, input_subsystem);
+
+    dialog.setWindowFlags(Qt::Dialog | Qt::CustomizeWindowHint | Qt::WindowTitleHint |
+                          Qt::WindowSystemMenuHint);
+    dialog.setWindowModality(Qt::WindowModal);
+    dialog.exec();
+
+    dialog.ApplyConfiguration();
+
+    LoadConfiguration();
+    CheckIfParametersMet();
+}
+
+void QtControllerSelectorDialog::CheckIfParametersMet() {
+    // Here, we check and validate the current configuration against all applicable parameters.
+    const auto num_connected_players = static_cast<int>(
+        std::count_if(player_groupboxes.begin(), player_groupboxes.end(),
+                      [this](const QGroupBox* player) { return player->isChecked(); }));
+
+    const auto min_supported_players = parameters.enable_single_mode ? 1 : parameters.min_players;
+    const auto max_supported_players = parameters.enable_single_mode ? 1 : parameters.max_players;
+
+    // First, check against the number of connected players.
+    if (num_connected_players < min_supported_players ||
+        num_connected_players > max_supported_players) {
+        parameters_met = false;
+        ui->buttonBox->setEnabled(parameters_met);
+        return;
+    }
+
+    // Next, check against all connected controllers.
+    const auto all_controllers_compatible = [this] {
+        for (std::size_t index = 0; index < NUM_PLAYERS; ++index) {
+            // Skip controllers that are not used, we only care about the currently connected ones.
+            if (!player_groupboxes[index]->isChecked() || !player_groupboxes[index]->isEnabled()) {
+                continue;
+            }
+
+            const auto compatible = IsControllerCompatible(
+                GetControllerTypeFromIndex(emulated_controllers[index]->currentIndex()),
+                parameters);
+
+            // If any controller is found to be incompatible, return false early.
+            if (!compatible) {
+                return false;
+            }
+        }
+
+        // Reaching here means all currently connected controllers are compatible.
+        return true;
+    }();
+
+    if (!all_controllers_compatible) {
+        parameters_met = false;
+        ui->buttonBox->setEnabled(parameters_met);
+        return;
+    }
+
+    parameters_met = true;
+    ui->buttonBox->setEnabled(parameters_met);
+}
+
+void QtControllerSelectorDialog::SetSupportedControllers() {
+    const QString theme = [this] {
+        if (QIcon::themeName().contains(QStringLiteral("dark"))) {
+            return QStringLiteral("_dark");
+        } else if (QIcon::themeName().contains(QStringLiteral("midnight"))) {
+            return QStringLiteral("_midnight");
+        } else {
+            return QString{};
+        }
+    }();
+
+    if (parameters.enable_single_mode && parameters.allow_handheld) {
+        ui->controllerSupported1->setStyleSheet(
+            QStringLiteral("image: url(:/controller/applet_handheld%0); ").arg(theme));
+    } else {
+        ui->controllerSupported1->setStyleSheet(
+            QStringLiteral("image: url(:/controller/applet_handheld%0_disabled); ").arg(theme));
+    }
+
+    if (parameters.allow_dual_joycons) {
+        ui->controllerSupported2->setStyleSheet(
+            QStringLiteral("image: url(:/controller/applet_dual_joycon%0); ").arg(theme));
+    } else {
+        ui->controllerSupported2->setStyleSheet(
+            QStringLiteral("image: url(:/controller/applet_dual_joycon%0_disabled); ").arg(theme));
+    }
+
+    if (parameters.allow_left_joycon) {
+        ui->controllerSupported3->setStyleSheet(
+            QStringLiteral("image: url(:/controller/applet_joycon_left%0); ").arg(theme));
+    } else {
+        ui->controllerSupported3->setStyleSheet(
+            QStringLiteral("image: url(:/controller/applet_joycon_left%0_disabled); ").arg(theme));
+    }
+
+    if (parameters.allow_right_joycon) {
+        ui->controllerSupported4->setStyleSheet(
+            QStringLiteral("image: url(:/controller/applet_joycon_right%0); ").arg(theme));
+    } else {
+        ui->controllerSupported4->setStyleSheet(
+            QStringLiteral("image: url(:/controller/applet_joycon_right%0_disabled); ").arg(theme));
+    }
+
+    if (parameters.allow_pro_controller) {
+        ui->controllerSupported5->setStyleSheet(
+            QStringLiteral("image: url(:/controller/applet_pro_controller%0); ").arg(theme));
+    } else {
+        ui->controllerSupported5->setStyleSheet(
+            QStringLiteral("image: url(:/controller/applet_pro_controller%0_disabled); ")
+                .arg(theme));
+    }
+
+    // enable_single_mode overrides min_players and max_players.
+    if (parameters.enable_single_mode) {
+        ui->numberSupportedLabel->setText(QStringLiteral("1"));
+        return;
+    }
+
+    if (parameters.min_players == parameters.max_players) {
+        ui->numberSupportedLabel->setText(QStringLiteral("%1").arg(parameters.max_players));
+    } else {
+        ui->numberSupportedLabel->setText(
+            QStringLiteral("%1 - %2").arg(parameters.min_players).arg(parameters.max_players));
+    }
+}
+
+void QtControllerSelectorDialog::UpdateControllerIcon(std::size_t player_index) {
+    if (!player_groupboxes[player_index]->isChecked()) {
+        connected_controller_icons[player_index]->setStyleSheet(QString{});
+        player_labels[player_index]->show();
+        return;
+    }
+
+    const QString stylesheet = [this, player_index] {
+        switch (GetControllerTypeFromIndex(emulated_controllers[player_index]->currentIndex())) {
+        case Settings::ControllerType::ProController:
+            return QStringLiteral("image: url(:/controller/applet_pro_controller%0); ");
+        case Settings::ControllerType::DualJoyconDetached:
+            return QStringLiteral("image: url(:/controller/applet_dual_joycon%0); ");
+        case Settings::ControllerType::LeftJoycon:
+            return QStringLiteral("image: url(:/controller/applet_joycon_left%0); ");
+        case Settings::ControllerType::RightJoycon:
+            return QStringLiteral("image: url(:/controller/applet_joycon_right%0); ");
+        case Settings::ControllerType::Handheld:
+            return QStringLiteral("image: url(:/controller/applet_handheld%0); ");
+        default:
+            return QString{};
+        }
+    }();
+
+    const QString theme = [this] {
+        if (QIcon::themeName().contains(QStringLiteral("dark"))) {
+            return QStringLiteral("_dark");
+        } else if (QIcon::themeName().contains(QStringLiteral("midnight"))) {
+            return QStringLiteral("_midnight");
+        } else {
+            return QString{};
+        }
+    }();
+
+    connected_controller_icons[player_index]->setStyleSheet(stylesheet.arg(theme));
+    player_labels[player_index]->hide();
+}
+
+void QtControllerSelectorDialog::UpdateControllerState(std::size_t player_index) {
+    auto& player = Settings::values.players[player_index];
+
+    player.controller_type =
+        GetControllerTypeFromIndex(emulated_controllers[player_index]->currentIndex());
+    player.connected = player_groupboxes[player_index]->isChecked();
+
+    // Player 2-8
+    if (player_index != 0) {
+        UpdateController(player.controller_type, player_index, player.connected);
+        return;
+    }
+
+    // Player 1 and Handheld
+    auto& handheld = Settings::values.players[8];
+    // If Handheld is selected, copy all the settings from Player 1 to Handheld.
+    if (player.controller_type == Settings::ControllerType::Handheld) {
+        handheld = player;
+        handheld.connected = player_groupboxes[player_index]->isChecked();
+        player.connected = false; // Disconnect Player 1
+    } else {
+        player.connected = player_groupboxes[player_index]->isChecked();
+        handheld.connected = false; // Disconnect Handheld
+    }
+
+    UpdateController(player.controller_type, player_index, player.connected);
+    UpdateController(Settings::ControllerType::Handheld, 8, handheld.connected);
+}
+
+void QtControllerSelectorDialog::UpdateLEDPattern(std::size_t player_index) {
+    if (!player_groupboxes[player_index]->isChecked() ||
+        GetControllerTypeFromIndex(emulated_controllers[player_index]->currentIndex()) ==
+            Settings::ControllerType::Handheld) {
+        led_patterns_boxes[player_index][0]->setChecked(false);
+        led_patterns_boxes[player_index][1]->setChecked(false);
+        led_patterns_boxes[player_index][2]->setChecked(false);
+        led_patterns_boxes[player_index][3]->setChecked(false);
+        return;
+    }
+
+    led_patterns_boxes[player_index][0]->setChecked(led_patterns[player_index][0]);
+    led_patterns_boxes[player_index][1]->setChecked(led_patterns[player_index][1]);
+    led_patterns_boxes[player_index][2]->setChecked(led_patterns[player_index][2]);
+    led_patterns_boxes[player_index][3]->setChecked(led_patterns[player_index][3]);
+}
+
+void QtControllerSelectorDialog::UpdateBorderColor(std::size_t player_index) {
+    if (!parameters.enable_border_color ||
+        player_index >= static_cast<std::size_t>(parameters.max_players) ||
+        player_groupboxes[player_index]->styleSheet().contains(QStringLiteral("QGroupBox"))) {
+        return;
+    }
+
+    player_groupboxes[player_index]->setStyleSheet(
+        player_groupboxes[player_index]->styleSheet().append(
+            QStringLiteral("QGroupBox#groupPlayer%1Connected:checked "
+                           "{ border: 1px solid rgba(%2, %3, %4, %5); }")
+                .arg(player_index + 1)
+                .arg(parameters.border_colors[player_index][0])
+                .arg(parameters.border_colors[player_index][1])
+                .arg(parameters.border_colors[player_index][2])
+                .arg(parameters.border_colors[player_index][3])));
+}
+
+void QtControllerSelectorDialog::SetExplainText(std::size_t player_index) {
+    if (!parameters.enable_explain_text ||
+        player_index >= static_cast<std::size_t>(parameters.max_players)) {
+        return;
+    }
+
+    explain_text_labels[player_index]->setText(QString::fromStdString(
+        Common::StringFromFixedZeroTerminatedBuffer(parameters.explain_text[player_index].data(),
+                                                    parameters.explain_text[player_index].size())));
+}
+
+void QtControllerSelectorDialog::UpdateDockedState(bool is_handheld) {
+    // Disallow changing the console mode if the controller type is handheld.
+    ui->radioDocked->setEnabled(!is_handheld);
+    ui->radioUndocked->setEnabled(!is_handheld);
+
+    ui->radioDocked->setChecked(Settings::values.use_docked_mode);
+    ui->radioUndocked->setChecked(!Settings::values.use_docked_mode);
+
+    // Also force into undocked mode if the controller type is handheld.
+    if (is_handheld) {
+        ui->radioUndocked->setChecked(true);
+    }
+}
+
+void QtControllerSelectorDialog::DisableUnsupportedPlayers() {
+    const auto max_supported_players = parameters.enable_single_mode ? 1 : parameters.max_players;
+
+    switch (max_supported_players) {
+    case 0:
+    default:
+        UNREACHABLE();
+        return;
+    case 1:
+        ui->widgetSpacer->hide();
+        ui->widgetSpacer2->hide();
+        ui->widgetSpacer3->hide();
+        ui->widgetSpacer4->hide();
+        break;
+    case 2:
+        ui->widgetSpacer->hide();
+        ui->widgetSpacer2->hide();
+        ui->widgetSpacer3->hide();
+        break;
+    case 3:
+        ui->widgetSpacer->hide();
+        ui->widgetSpacer2->hide();
+        break;
+    case 4:
+        ui->widgetSpacer->hide();
+        break;
+    case 5:
+    case 6:
+    case 7:
+    case 8:
+        break;
+    }
+
+    for (std::size_t index = max_supported_players; index < NUM_PLAYERS; ++index) {
+        // Disconnect any unsupported players here and disable or hide them if applicable.
+        Settings::values.players[index].connected = false;
+        UpdateController(Settings::values.players[index].controller_type, index, false);
+        // Hide the player widgets when max_supported_controllers is less than or equal to 4.
+        if (max_supported_players <= 4) {
+            player_widgets[index]->hide();
+        }
+
+        // Disable and hide the following to prevent these from interaction.
+        player_widgets[index]->setDisabled(true);
+        connected_controller_checkboxes[index]->setDisabled(true);
+        connected_controller_labels[index]->hide();
+        connected_controller_checkboxes[index]->hide();
+    }
+}
+
+QtControllerSelector::QtControllerSelector(GMainWindow& parent) {
+    connect(this, &QtControllerSelector::MainWindowReconfigureControllers, &parent,
+            &GMainWindow::ControllerSelectorReconfigureControllers, Qt::QueuedConnection);
+    connect(&parent, &GMainWindow::ControllerSelectorReconfigureFinished, this,
+            &QtControllerSelector::MainWindowReconfigureFinished, Qt::QueuedConnection);
+}
+
+QtControllerSelector::~QtControllerSelector() = default;
+
+void QtControllerSelector::ReconfigureControllers(
+    std::function<void()> callback, Core::Frontend::ControllerParameters parameters) const {
+    this->callback = std::move(callback);
+    emit MainWindowReconfigureControllers(parameters);
+}
+
+void QtControllerSelector::MainWindowReconfigureFinished() {
+    // Acquire the HLE mutex
+    std::lock_guard<std::recursive_mutex> lock(HLE::g_hle_lock);
+    callback();
+}

src/yuzu/applets/controller.h

@@ -0,0 +1,133 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <memory>
+#include <QDialog>
+#include "core/frontend/applets/controller.h"
+
+class GMainWindow;
+class QCheckBox;
+class QComboBox;
+class QDialogButtonBox;
+class QGroupBox;
+class QLabel;
+
+namespace InputCommon {
+class InputSubsystem;
+}
+
+namespace Ui {
+class QtControllerSelectorDialog;
+}
+
+class QtControllerSelectorDialog final : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit QtControllerSelectorDialog(QWidget* parent,
+                                        Core::Frontend::ControllerParameters parameters_,
+                                        InputCommon::InputSubsystem* input_subsystem_);
+    ~QtControllerSelectorDialog() override;
+
+private:
+    // Applies the current configuration.
+    void ApplyConfiguration();
+
+    // Loads the current input configuration into the frontend applet.
+    void LoadConfiguration();
+
+    // Initializes the "Configure Input" Dialog.
+    void CallConfigureInputDialog();
+
+    // Checks the current configuration against the given parameters and
+    // sets the value of parameters_met.
+    void CheckIfParametersMet();
+
+    // Sets the controller icons for "Supported Controller Types".
+    void SetSupportedControllers();
+
+    // Updates the controller icons per player.
+    void UpdateControllerIcon(std::size_t player_index);
+
+    // Updates the controller state (type and connection status) per player.
+    void UpdateControllerState(std::size_t player_index);
+
+    // Updates the LED pattern per player.
+    void UpdateLEDPattern(std::size_t player_index);
+
+    // Updates the border color per player.
+    void UpdateBorderColor(std::size_t player_index);
+
+    // Sets the "Explain Text" per player.
+    void SetExplainText(std::size_t player_index);
+
+    // Updates the console mode.
+    void UpdateDockedState(bool is_handheld);
+
+    // Disables and disconnects unsupported players based on the given parameters.
+    void DisableUnsupportedPlayers();
+
+    std::unique_ptr<Ui::QtControllerSelectorDialog> ui;
+
+    // Parameters sent in from the backend HLE applet.
+    Core::Frontend::ControllerParameters parameters;
+
+    InputCommon::InputSubsystem* input_subsystem;
+
+    // This is true if and only if all parameters are met. Otherwise, this is false.
+    // This determines whether the "OK" button can be clicked to exit the applet.
+    bool parameters_met{false};
+
+    static constexpr std::size_t NUM_PLAYERS = 8;
+
+    // Widgets encapsulating the groupboxes and comboboxes per player.
+    std::array<QWidget*, NUM_PLAYERS> player_widgets;
+
+    // Groupboxes encapsulating the controller icons and LED patterns per player.
+    std::array<QGroupBox*, NUM_PLAYERS> player_groupboxes;
+
+    // Icons for currently connected controllers/players.
+    std::array<QWidget*, NUM_PLAYERS> connected_controller_icons;
+
+    // Labels that represent the player numbers in place of the controller icons.
+    std::array<QLabel*, NUM_PLAYERS> player_labels;
+
+    // LED patterns for currently connected controllers/players.
+    std::array<std::array<QCheckBox*, 4>, NUM_PLAYERS> led_patterns_boxes;
+
+    // Labels representing additional information known as "Explain Text" per player.
+    std::array<QLabel*, NUM_PLAYERS> explain_text_labels;
+
+    // Comboboxes with a list of emulated controllers per player.
+    std::array<QComboBox*, NUM_PLAYERS> emulated_controllers;
+
+    // Labels representing the number of connected controllers
+    // above the "Connected Controllers" checkboxes.
+    std::array<QLabel*, NUM_PLAYERS> connected_controller_labels;
+
+    // Checkboxes representing the "Connected Controllers".
+    std::array<QCheckBox*, NUM_PLAYERS> connected_controller_checkboxes;
+};
+
+class QtControllerSelector final : public QObject, public Core::Frontend::ControllerApplet {
+    Q_OBJECT
+
+public:
+    explicit QtControllerSelector(GMainWindow& parent);
+    ~QtControllerSelector() override;
+
+    void ReconfigureControllers(std::function<void()> callback,
+                                Core::Frontend::ControllerParameters parameters) const override;
+
+signals:
+    void MainWindowReconfigureControllers(Core::Frontend::ControllerParameters parameters) const;
+
+private:
+    void MainWindowReconfigureFinished();
+
+    mutable std::function<void()> callback;
+};

src/yuzu/configuration/configure_input.cpp

@@ -70,7 +70,8 @@ ConfigureInput::ConfigureInput(QWidget* parent)
 
 ConfigureInput::~ConfigureInput() = default;
 
-void ConfigureInput::Initialize(InputCommon::InputSubsystem* input_subsystem) {
+void ConfigureInput::Initialize(InputCommon::InputSubsystem* input_subsystem,
+                                std::size_t max_players) {
     player_controllers = {
         new ConfigureInputPlayer(this, 0, ui->consoleInputSettings, input_subsystem),
         new ConfigureInputPlayer(this, 1, ui->consoleInputSettings, input_subsystem),
@@ -93,6 +94,11 @@ void ConfigureInput::Initialize(InputCommon::InputSubsystem* input_subsystem) {
         ui->checkboxPlayer7Connected, ui->checkboxPlayer8Connected,
     };
 
+    std::array<QLabel*, 8> player_connected_labels = {
+        ui->label,   ui->label_3, ui->label_4, ui->label_5,
+        ui->label_6, ui->label_7, ui->label_8, ui->label_9,
+    };
+
     for (std::size_t i = 0; i < player_tabs.size(); ++i) {
         player_tabs[i]->setLayout(new QHBoxLayout(player_tabs[i]));
         player_tabs[i]->layout()->addWidget(player_controllers[i]);
@@ -112,6 +118,13 @@ void ConfigureInput::Initialize(InputCommon::InputSubsystem* input_subsystem) {
         connect(player_connected[i], &QCheckBox::stateChanged, [this, i](int state) {
             player_controllers[i]->ConnectPlayer(state == Qt::Checked);
         });
+
+        // Remove/hide all the elements that exceed max_players, if applicable.
+        if (i >= max_players) {
+            ui->tabWidget->removeTab(static_cast<int>(max_players));
+            player_connected[i]->hide();
+            player_connected_labels[i]->hide();
+        }
     }
     // Only the first player can choose handheld mode so connect the signal just to player 1
     connect(player_controllers[0], &ConfigureInputPlayer::HandheldStateChanged,
@@ -175,8 +188,7 @@ void ConfigureInput::RetranslateUI() {
 
 void ConfigureInput::LoadConfiguration() {
     LoadPlayerControllerIndices();
-    UpdateDockedState(Settings::values.players[0].controller_type ==
-                      Settings::ControllerType::Handheld);
+    UpdateDockedState(Settings::values.players[8].connected);
 
     ui->vibrationGroup->setChecked(Settings::values.vibration_enabled);
 }
@@ -208,14 +220,14 @@ void ConfigureInput::RestoreDefaults() {
 }
 
 void ConfigureInput::UpdateDockedState(bool is_handheld) {
-    // If the controller type is handheld only, disallow changing docked mode
+    // Disallow changing the console mode if the controller type is handheld.
     ui->radioDocked->setEnabled(!is_handheld);
     ui->radioUndocked->setEnabled(!is_handheld);
 
     ui->radioDocked->setChecked(Settings::values.use_docked_mode);
     ui->radioUndocked->setChecked(!Settings::values.use_docked_mode);
 
-    // If its handheld only, force docked mode off (since you can't play handheld in a dock)
+    // Also force into undocked mode if the controller type is handheld.
     if (is_handheld) {
         ui->radioUndocked->setChecked(true);
     }

src/yuzu/configuration/configure_input.h

@@ -37,7 +37,7 @@ public:
     ~ConfigureInput() override;
 
     /// Initializes the input dialog with the given input subsystem.
-    void Initialize(InputCommon::InputSubsystem* input_subsystem_);
+    void Initialize(InputCommon::InputSubsystem* input_subsystem_, std::size_t max_players = 8);
 
     /// Save all button configurations to settings file.
     void ApplyConfiguration();

src/yuzu/configuration/configure_input_dialog.cpp

@@ -0,0 +1,37 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "ui_configure_input_dialog.h"
+#include "yuzu/configuration/configure_input_dialog.h"
+
+ConfigureInputDialog::ConfigureInputDialog(QWidget* parent, std::size_t max_players,
+                                           InputCommon::InputSubsystem* input_subsystem)
+    : QDialog(parent), ui(std::make_unique<Ui::ConfigureInputDialog>()),
+      input_widget(new ConfigureInput(this)) {
+    ui->setupUi(this);
+
+    input_widget->Initialize(input_subsystem, max_players);
+
+    ui->inputLayout->addWidget(input_widget);
+
+    RetranslateUI();
+}
+
+ConfigureInputDialog::~ConfigureInputDialog() = default;
+
+void ConfigureInputDialog::ApplyConfiguration() {
+    input_widget->ApplyConfiguration();
+}
+
+void ConfigureInputDialog::changeEvent(QEvent* event) {
+    if (event->type() == QEvent::LanguageChange) {
+        RetranslateUI();
+    }
+
+    QDialog::changeEvent(event);
+}
+
+void ConfigureInputDialog::RetranslateUI() {
+    ui->retranslateUi(this);
+}

src/yuzu/configuration/configure_input_dialog.h

@@ -0,0 +1,38 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <QDialog>
+#include "yuzu/configuration/configure_input.h"
+
+class QPushButton;
+
+namespace InputCommon {
+class InputSubsystem;
+}
+
+namespace Ui {
+class ConfigureInputDialog;
+}
+
+class ConfigureInputDialog : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit ConfigureInputDialog(QWidget* parent, std::size_t max_players,
+                                  InputCommon::InputSubsystem* input_subsystem);
+    ~ConfigureInputDialog() override;
+
+    void ApplyConfiguration();
+
+private:
+    void changeEvent(QEvent* event) override;
+    void RetranslateUI();
+
+    std::unique_ptr<Ui::ConfigureInputDialog> ui;
+
+    ConfigureInput* input_widget;
+};

src/yuzu/configuration/configure_input_dialog.ui

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ConfigureInputDialog</class>
+ <widget class="QDialog" name="ConfigureInputDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>70</width>
+    <height>540</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Configure Input</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <property name="spacing">
+    <number>2</number>
+   </property>
+   <property name="leftMargin">
+    <number>9</number>
+   </property>
+   <property name="topMargin">
+    <number>9</number>
+   </property>
+   <property name="rightMargin">
+    <number>9</number>
+   </property>
+   <property name="bottomMargin">
+    <number>9</number>
+   </property>
+   <item>
+    <layout class="QHBoxLayout" name="inputLayout"/>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QDialogButtonBox" name="buttonBox">
+       <property name="standardButtons">
+        <set>QDialogButtonBox::Ok</set>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>ConfigureInputDialog</receiver>
+   <slot>accept()</slot>
+  </connection>
+ </connections>
+</ui>

src/yuzu/main.cpp

@@ -11,6 +11,7 @@
 #endif
 
 // VFS includes must be before glad as they will conflict with Windows file api, which uses defines.
+#include "applets/controller.h"
 #include "applets/error.h"
 #include "applets/profile_select.h"
 #include "applets/software_keyboard.h"
@@ -19,7 +20,9 @@
 #include "configuration/configure_per_game.h"
 #include "core/file_sys/vfs.h"
 #include "core/file_sys/vfs_real.h"
+#include "core/frontend/applets/controller.h"
 #include "core/frontend/applets/general_frontend.h"
+#include "core/frontend/applets/software_keyboard.h"
 #include "core/hle/service/acc/profile_manager.h"
 #include "core/hle/service/am/applet_ae.h"
 #include "core/hle/service/am/applet_oe.h"
@@ -84,7 +87,6 @@ static FileSys::VirtualFile VfsDirectoryCreateFileWrapper(const FileSys::Virtual
 #include "core/file_sys/romfs.h"
 #include "core/file_sys/savedata_factory.h"
 #include "core/file_sys/submission_package.h"
-#include "core/frontend/applets/software_keyboard.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/service/am/am.h"
 #include "core/hle/service/filesystem/filesystem.h"
@@ -283,6 +285,23 @@ GMainWindow::~GMainWindow() {
         delete render_window;
 }
 
+void GMainWindow::ControllerSelectorReconfigureControllers(
+    const Core::Frontend::ControllerParameters& parameters) {
+    QtControllerSelectorDialog dialog(this, parameters, input_subsystem.get());
+    dialog.setWindowFlags(Qt::Dialog | Qt::CustomizeWindowHint | Qt::WindowTitleHint |
+                          Qt::WindowSystemMenuHint);
+    dialog.setWindowModality(Qt::WindowModal);
+    dialog.exec();
+
+    emit ControllerSelectorReconfigureFinished();
+
+    // Don't forget to apply settings.
+    Settings::Apply();
+    config->Save();
+
+    UpdateStatusButtons();
+}
+
 void GMainWindow::ProfileSelectorSelectProfile() {
     const Service::Account::ProfileManager manager;
     int index = 0;
@@ -291,10 +310,12 @@ void GMainWindow::ProfileSelectorSelectProfile() {
         dialog.setWindowFlags(Qt::Dialog | Qt::CustomizeWindowHint | Qt::WindowTitleHint |
                               Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint);
         dialog.setWindowModality(Qt::WindowModal);
+
         if (dialog.exec() == QDialog::Rejected) {
             emit ProfileSelectorFinishedSelection(std::nullopt);
             return;
         }
+
         index = dialog.GetIndex();
     }
 
@@ -966,13 +987,14 @@ bool GMainWindow::LoadROM(const QString& filename) {
     system.SetFilesystem(vfs);
 
     system.SetAppletFrontendSet({
-        nullptr,                                     // Parental Controls
-        std::make_unique<QtErrorDisplay>(*this),     //
-        nullptr,                                     // Photo Viewer
-        std::make_unique<QtProfileSelector>(*this),  //
-        std::make_unique<QtSoftwareKeyboard>(*this), //
-        std::make_unique<QtWebBrowser>(*this),       //
-        nullptr,                                     // E-Commerce
+        std::make_unique<QtControllerSelector>(*this), // Controller Selector
+        nullptr,                                       // E-Commerce
+        std::make_unique<QtErrorDisplay>(*this),       // Error Display
+        nullptr,                                       // Parental Controls
+        nullptr,                                       // Photo Viewer
+        std::make_unique<QtProfileSelector>(*this),    // Profile Selector
+        std::make_unique<QtSoftwareKeyboard>(*this),   // Software Keyboard
+        std::make_unique<QtWebBrowser>(*this),         // Web Browser
     });
 
     system.RegisterHostThread();
@@ -2047,6 +2069,7 @@ void GMainWindow::OnStartGame() {
 
     emu_thread->SetRunning(true);
 
+    qRegisterMetaType<Core::Frontend::ControllerParameters>("Core::Frontend::ControllerParameters");
     qRegisterMetaType<Core::Frontend::SoftwareKeyboardParameters>(
         "Core::Frontend::SoftwareKeyboardParameters");
     qRegisterMetaType<Core::System::ResultStatus>("Core::System::ResultStatus");

src/yuzu/main.h

@@ -37,6 +37,7 @@ enum class InstalledEntryType;
 class GameListPlaceholder;
 
 namespace Core::Frontend {
+struct ControllerParameters;
 struct SoftwareKeyboardParameters;
 } // namespace Core::Frontend
 
@@ -116,9 +117,12 @@ signals:
 
     void UpdateInstallProgress();
 
+    void ControllerSelectorReconfigureFinished();
+
     void ErrorDisplayFinished();
 
     void ProfileSelectorFinishedSelection(std::optional<Common::UUID> uuid);
+
     void SoftwareKeyboardFinishedText(std::optional<std::u16string> text);
     void SoftwareKeyboardFinishedCheckDialog();
 
@@ -127,6 +131,8 @@ signals:
 
 public slots:
     void OnLoadComplete();
+    void ControllerSelectorReconfigureControllers(
+        const Core::Frontend::ControllerParameters& parameters);
     void ErrorDisplayDisplayError(QString body);
     void ProfileSelectorSelectProfile();
     void SoftwareKeyboardGetText(const Core::Frontend::SoftwareKeyboardParameters& parameters);