refactor: remove IInterface class, that only adds a virtual construcor

src/lib/arch/ArchString.h

@@ -9,7 +9,6 @@
 #pragma once
 
 #include "common/Common.h"
-#include "common/IInterface.h"
 
 #include <stdarg.h>
 
@@ -18,13 +17,13 @@
 This interface defines the string operations required by
 deskflow.  Each architecture must implement this interface.
 */
-class ArchString : public IInterface
+class ArchString
 {
 public:
   ArchString() = default;
   ArchString(const ArchString &) = delete;
   ArchString(ArchString &&) = delete;
-  ~ArchString() override = default;
+  virtual ~ArchString() = default;
 
   ArchString &operator=(const ArchString &) = delete;
   ArchString &operator=(ArchString &&) = delete;

src/lib/arch/IArchDaemon.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -7,7 +8,7 @@
 
 #pragma once
 
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 #include <functional>
 #include <string>
@@ -18,11 +19,12 @@ This interface defines the operations required by deskflow for installing
 uninstalling daeamons and daemonizing a process.  Each architecture must
 implement this interface.
 */
-class IArchDaemon : public IInterface
+class IArchDaemon
 {
 public:
   using DaemonFunc = std::function<int(int, const char **)>;
 
+  virtual ~IArchDaemon() = default;
   //! @name manipulators
   //@{
 

src/lib/arch/IArchLog.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -8,16 +9,17 @@
 #pragma once
 
 #include "base/LogLevel.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 //! Interface for architecture dependent logging
 /*!
 This interface defines the logging operations required by
 deskflow.  Each architecture must implement this interface.
 */
-class IArchLog : public IInterface
+class IArchLog
 {
 public:
+  virtual ~IArchLog() = default;
   //! @name manipulators
   //@{
 

src/lib/arch/IArchMultithread.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -7,7 +8,7 @@
 
 #pragma once
 
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 /*!
 \class ArchCondImpl
@@ -57,13 +58,15 @@ using ArchThread = ArchThreadImpl *;
 This interface defines the multithreading operations required by
 deskflow.  Each architecture must implement this interface.
 */
-class IArchMultithread : public IInterface
+class IArchMultithread
 {
 public:
   //! Type of thread entry point
   using ThreadFunc = void *(*)(void *);
   //! Type of thread identifier
   using ThreadID = unsigned int;
+
+  virtual ~IArchMultithread() = default;
   //! Types of signals
   /*!
   Not all platforms support all signals.  Unsupported signals are

src/lib/arch/IArchNetwork.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -7,7 +8,7 @@
 
 #pragma once
 
-#include "common/IInterface.h"
+#include "common/Common.h"
 #include <string>
 
 #include <vector>
@@ -49,9 +50,10 @@ using ArchNetAddress = ArchNetAddressImpl *;
 This interface defines the networking operations required by
 deskflow.  Each architecture must implement this interface.
 */
-class IArchNetwork : public IInterface
+class IArchNetwork
 {
 public:
+  virtual ~IArchNetwork() = default;
   //! Supported address families
   enum class AddressFamily : uint8_t
   {

src/lib/base/IEventJob.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2004 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -7,7 +8,7 @@
 
 #pragma once
 
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 class Event;
 
@@ -15,9 +16,10 @@ class Event;
 /*!
 An event job is an interface for executing a event handler.
 */
-class IEventJob : public IInterface
+class IEventJob
 {
 public:
+  virtual ~IEventJob() = default;
   //! Run the job
   virtual void run(const Event &) = 0;
 };

src/lib/base/IEventQueue.h

@@ -10,7 +10,7 @@
 
 #include "base/Event.h"
 #include "base/EventTypes.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 #include <functional>
 #include <string>
@@ -28,10 +28,12 @@ on any event becoming available at the head of the queue and can place
 new events at the end of the queue.  Clients can also add and remove
 timers which generate events periodically.
 */
-class IEventQueue : public IInterface
+class IEventQueue
 {
 public:
   using EventHandler = std::function<void(const Event &)>;
+
+  virtual ~IEventQueue() = default;
   class TimerEvent
   {
   public:

src/lib/base/IEventQueueBuffer.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2004 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -8,7 +9,6 @@
 #pragma once
 
 #include "common/Common.h"
-#include "common/IInterface.h"
 
 class Event;
 class EventQueueTimer;
@@ -17,9 +17,10 @@ class EventQueueTimer;
 /*!
 An event queue buffer provides a queue of events for an IEventQueue.
 */
-class IEventQueueBuffer : public IInterface
+class IEventQueueBuffer
 {
 public:
+  virtual ~IEventQueueBuffer() = default;
   enum class Type : uint8_t
   {
     Unknown, //!< No event is available

src/lib/base/IJob.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -7,15 +8,16 @@
 
 #pragma once
 
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 //! Job interface
 /*!
 A job is an interface for executing some function.
 */
-class IJob : public IInterface
+class IJob
 {
 public:
+  virtual ~IJob() = default;
   //! Run the job
   virtual void run() = 0;
 };

src/lib/base/ILogOutputter.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -9,7 +10,7 @@
 
 #include "base/Log.h"
 #include "base/LogLevel.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 //! Outputter interface
 /*!
@@ -17,9 +18,11 @@ Type of outputter interface.  The logger performs all output through
 outputters.  ILogOutputter overrides must not call any log functions
 directly or indirectly.
 */
-class ILogOutputter : public IInterface
+class ILogOutputter
 {
 public:
+  virtual ~ILogOutputter() = default;
+
   //! @name manipulators
   //@{
 

src/lib/common/CMakeLists.txt

@@ -5,7 +5,6 @@ configure_file(Constants.h.in Constants.h @ONLY)
 
 add_library(common STATIC
   Common.h
-  IInterface.h
   Settings.h
   Settings.cpp
   QSettingsProxy.cpp

src/lib/common/IInterface.h

@@ -1,22 +0,0 @@
-/*
- * Deskflow -- mouse and keyboard sharing utility
- * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
- * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
- * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
- */
-
-#pragma once
-
-#include "Common.h"
-
-//! Base class of interfaces
-/*!
-This is the base class of all interface classes.  An interface class has
-only pure virtual methods.
-*/
-class IInterface
-{
-public:
-  //! Interface destructor does nothing
-  virtual ~IInterface() = default;
-};

src/lib/deskflow/IApp.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2012 Nick Bolton
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -7,7 +8,7 @@
 
 #pragma once
 
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 using StartupFunc = int (*)(int, char **);
 
@@ -18,9 +19,10 @@ class Screen;
 
 class IEventQueue;
 
-class IApp : public IInterface
+class IApp
 {
 public:
+  virtual ~IApp() = default;
   virtual void setByeFunc(void (*bye)(int)) = 0;
   virtual deskflow::ArgsBase &argsBase() const = 0;
   virtual int standardStartup(int argc, char **argv) = 0;

src/lib/deskflow/IAppUtil.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -7,15 +8,16 @@
 
 #pragma once
 
-#include "common/IInterface.h"
+#include "common/Common.h"
 #include "deskflow/IApp.h"
 
 #include <string>
 #include <vector>
 
-class IAppUtil : public IInterface
+class IAppUtil
 {
 public:
+  virtual ~IAppUtil() = default;
   virtual void adoptApp(IApp *app) = 0;
   virtual IApp &app() const = 0;
   virtual int run(int argc, char **argv) = 0;

src/lib/deskflow/IClipboard.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -8,7 +9,7 @@
 #pragma once
 
 #include "base/EventTypes.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 #include <string>
 
@@ -16,9 +17,10 @@
 /*!
 This interface defines the methods common to all clipboards.
 */
-class IClipboard : public IInterface
+class IClipboard
 {
 public:
+  virtual ~IClipboard() = default;
   //! Timestamp type
   /*!
   Timestamp type.  Timestamps are in milliseconds from some

src/lib/deskflow/IKeyState.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2003 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -10,7 +11,7 @@
 #include "base/Event.h"
 #include "base/EventTypes.h"
 #include "base/IEventQueue.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 #include "deskflow/KeyTypes.h"
 
 #include <set>
@@ -20,10 +21,11 @@
 This interface provides access to set and query the keyboard state and
 to synthesize key events.
 */
-class IKeyState : public IInterface
+class IKeyState
 {
 public:
   explicit IKeyState(const IEventQueue *events);
+  virtual ~IKeyState() = default;
   inline static const auto s_numButtons = 0x200;
 
   //! Key event data

src/lib/deskflow/INode.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -7,8 +8,10 @@
 
 #pragma once
 
-#include "common/IInterface.h"
+#include "common/Common.h"
 
-class INode : public IInterface
+class INode
 {
+public:
+  virtual ~INode() = default;
 };

src/lib/deskflow/IPrimaryScreen.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2003 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -9,7 +10,7 @@
 
 #include "base/Event.h"
 #include "base/EventTypes.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 #include "deskflow/KeyTypes.h"
 #include "deskflow/MouseTypes.h"
 
@@ -18,9 +19,10 @@
 This interface defines the methods common to all platform dependent
 primary screen implementations.
 */
-class IPrimaryScreen : public IInterface
+class IPrimaryScreen
 {
 public:
+  virtual ~IPrimaryScreen() = default;
   //! Button event data
   class ButtonInfo
   {

src/lib/deskflow/IScreen.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2003 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -9,7 +10,7 @@
 
 #include "base/Event.h"
 #include "base/EventTypes.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 #include "deskflow/ClipboardTypes.h"
 
 class IClipboard;
@@ -18,9 +19,10 @@ class IClipboard;
 /*!
 This interface defines the methods common to all screens.
 */
-class IScreen : public IInterface
+class IScreen
 {
 public:
+  virtual ~IScreen() = default;
   struct ClipboardInfo
   {
   public:

src/lib/deskflow/IScreenSaver.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -8,15 +9,16 @@
 #pragma once
 
 #include "base/Event.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 //! Screen saver interface
 /*!
 This interface defines the methods common to all screen savers.
 */
-class IScreenSaver : public IInterface
+class IScreenSaver
 {
 public:
+  virtual ~IScreenSaver() = default;
   // note -- the c'tor/d'tor must *not* enable/disable the screen saver
 
   //! @name manipulators

src/lib/deskflow/ISecondaryScreen.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2003 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -9,7 +10,7 @@
 
 #include "base/Event.h"
 #include "base/EventTypes.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 #include "deskflow/MouseTypes.h"
 
 //! Secondary screen interface
@@ -17,9 +18,10 @@
 This interface defines the methods common to all platform dependent
 secondary screen implementations.
 */
-class ISecondaryScreen : public IInterface
+class ISecondaryScreen
 {
 public:
+  virtual ~ISecondaryScreen() = default;
   //! @name accessors
   //@{
 

src/lib/io/IStream.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2004 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -10,7 +11,7 @@
 #include "base/Event.h"
 #include "base/EventTypes.h"
 #include "base/IEventQueue.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 class IEventQueue;
 
@@ -20,11 +21,11 @@ namespace deskflow {
 /*!
 Defines the interface for all streams.
 */
-class IStream : public IInterface
+class IStream
 {
 public:
   IStream() = default;
-
+  virtual ~IStream() = default;
   //! @name manipulators
   //@{
 

src/lib/net/ISocket.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -9,7 +10,7 @@
 
 #include "base/Event.h"
 #include "base/EventTypes.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 class NetworkAddress;
 
@@ -18,9 +19,10 @@ class NetworkAddress;
 This interface defines the methods common to all network sockets.
 Generated events use \c this as the target.
 */
-class ISocket : public IInterface
+class ISocket
 {
 public:
+  virtual ~ISocket() = default;
   //! @name manipulators
   //@{
 

src/lib/net/ISocketFactory.h

@@ -9,7 +9,7 @@
 #pragma once
 
 #include "arch/IArchNetwork.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 #include "net/SecurityLevel.h"
 
 class IDataSocket;
@@ -20,9 +20,10 @@ class IListenSocket;
 This interface defines the methods common to all factories used to
 create sockets.
 */
-class ISocketFactory : public IInterface
+class ISocketFactory
 {
 public:
+  virtual ~ISocketFactory() = default;
   //! @name accessors
   //@{
 

src/lib/net/ISocketMultiplexerJob.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -8,15 +9,16 @@
 #pragma once
 
 #include "arch/IArchNetwork.h"
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 //! Socket multiplexer job
 /*!
 A socket multiplexer job handles events on a socket.
 */
-class ISocketMultiplexerJob : public IInterface
+class ISocketMultiplexerJob
 {
 public:
+  virtual ~ISocketMultiplexerJob() = default;
   //! @name manipulators
   //@{
 

src/lib/platform/IMSWindowsClipboardFacade.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -7,14 +8,14 @@
 
 #pragma once
 
-#include "common/IInterface.h"
+#include "common/Common.h"
 
 #define WIN32_LEAN_AND_MEAN
 #include <Windows.h>
 
 class IMSWindowsClipboardConverter;
 
-class IMSWindowsClipboardFacade : public IInterface
+class IMSWindowsClipboardFacade
 {
 public:
   virtual void write(HANDLE win32Data, UINT win32Format) = 0;

src/lib/platform/IOSXKeyResource.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2016 Symless Ltd.
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
  */
@@ -8,9 +9,10 @@
 
 #include "deskflow/KeyState.h"
 
-class IOSXKeyResource : public IInterface
+class IOSXKeyResource
 {
 public:
+  virtual ~IOSXKeyResource() = default;
   virtual bool isValid() const = 0;
   virtual uint32_t getNumModifierCombinations() const = 0;
   virtual uint32_t getNumTables() const = 0;

src/lib/platform/MSWindowsClipboard.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -80,9 +81,10 @@ private:
 This interface defines the methods common to all win32 clipboard format
 converters.
 */
-class IMSWindowsClipboardConverter : public IInterface
+class IMSWindowsClipboardConverter
 {
 public:
+  virtual ~IMSWindowsClipboardConverter() = default;
   // accessors
 
   // return the clipboard format this object converts from/to

src/lib/platform/OSXClipboard.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2004 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -50,9 +51,10 @@ private:
 /*!
 This interface defines the methods common to all Scrap book format
 */
-class IOSXClipboardConverter : public IInterface
+class IOSXClipboardConverter
 {
 public:
+  virtual ~IOSXClipboardConverter() = default;
   //! @name accessors
   //@{
 

src/lib/platform/XWindowsClipboard.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -326,9 +327,10 @@ private:
 This interface defines the methods common to all X11 clipboard format
 converters.
 */
-class IXWindowsClipboardConverter : public IInterface
+class IXWindowsClipboardConverter
 {
 public:
+  virtual ~IXWindowsClipboardConverter() = default;
   //! @name accessors
   //@{