DolphinQt: Refactor, add ConfigControl class

This reduces code duplication in the different ConfigControls. This is
helpful for the next commit, which will modify the now deduplicated
code.

Source/Core/DolphinQt/Config/ConfigControls/ConfigControl.h

@@ -0,0 +1,72 @@
+// Copyright 2024 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <QFont>
+#include <QMouseEvent>
+#include <QSignalBlocker>
+
+#include "Common/Config/Enums.h"
+#include "DolphinQt/Settings.h"
+
+namespace Config
+{
+template <typename T>
+class Info;
+struct Location;
+}  // namespace Config
+
+template <class Derived>
+class ConfigControl : public Derived
+{
+public:
+  ConfigControl(const Config::Location& location) : m_location(location) { ConnectConfig(); }
+  ConfigControl(const QString& label, const Config::Location& location)
+      : Derived(label), m_location(location)
+  {
+    ConnectConfig();
+  }
+  ConfigControl(const Qt::Orientation& orient, const Config::Location& location)
+      : Derived(orient), m_location(location)
+  {
+    ConnectConfig();
+  }
+
+  const Config::Location GetLocation() const { return m_location; }
+
+protected:
+  void ConnectConfig()
+  {
+    Derived::connect(&Settings::Instance(), &Settings::ConfigChanged, this, [this] {
+      QFont bf = Derived::font();
+      bf.setBold(IsConfigLocal());
+      Derived::setFont(bf);
+
+      const QSignalBlocker blocker(this);
+      OnConfigChanged();
+    });
+  }
+
+  template <typename T>
+  void SaveValue(const Config::Info<T>& setting, const T& value)
+  {
+    Config::SetBaseOrCurrent(setting, value);
+  }
+
+  template <typename T>
+  const T ReadValue(const Config::Info<T>& setting) const
+  {
+    return Config::Get(setting);
+  }
+
+  virtual void OnConfigChanged() {};
+
+private:
+  bool IsConfigLocal() const
+  {
+    return Config::GetActiveLayerForConfig(m_location) != Config::LayerType::Base;
+  }
+
+  const Config::Location m_location;
+};