yuzu: Implement basic controller navigation

src/yuzu/util/controller_navigation.h

@@ -0,0 +1,51 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included
+
+#pragma once
+
+#include <QKeyEvent>
+#include <QObject>
+
+#include "common/input.h"
+#include "common/settings_input.h"
+
+namespace Core::HID {
+using ButtonValues = std::array<Common::Input::ButtonStatus, Settings::NativeButton::NumButtons>;
+using SticksValues = std::array<Common::Input::StickStatus, Settings::NativeAnalog::NumAnalogs>;
+enum class ControllerTriggerType;
+class EmulatedController;
+class HIDCore;
+} // namespace Core::HID
+
+class ControllerNavigation : public QObject {
+    Q_OBJECT
+
+public:
+    explicit ControllerNavigation(Core::HID::HIDCore& hid_core, QWidget* parent = nullptr);
+    ~ControllerNavigation();
+
+    /// Disables events from the emulated controller
+    void UnloadController();
+
+signals:
+    void TriggerKeyboardEvent(Qt::Key key);
+
+private:
+    void TriggerButton(Settings::NativeButton::Values native_button, Qt::Key key);
+    void ControllerUpdateEvent(Core::HID::ControllerTriggerType type);
+
+    void ControllerUpdateButton();
+
+    void ControllerUpdateStick();
+
+    Core::HID::ButtonValues button_values{};
+    Core::HID::SticksValues stick_values{};
+
+    int player1_callback_key{};
+    int handheld_callback_key{};
+    bool is_controller_set{};
+    mutable std::mutex mutex;
+    Core::HID::EmulatedController* player1_controller;
+    Core::HID::EmulatedController* handheld_controller;
+};