IKeyboard interface

This is the main interface for platform specific implementations.
It is a singleton design, since we need one object per process.

refs #83

src/blackcore/keyboard.cpp

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2013 VATSIM Community / contributors
+ *  This Source Code Form is subject to the terms of the Mozilla Public
+ *  License, v. 2.0. If a copy of the MPL was not distributed with this
+ *  file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "keyboard.h"
+
+#if defined(Q_OS_WIN)
+    #include "blackcore/win/keyboard_windows.h"
+#endif
+
+namespace BlackCore
+{
+    IKeyboard *IKeyboard::m_instance = nullptr;
+
+    IKeyboard::IKeyboard(QObject *parent) :
+        QObject(parent)
+    {
+    }
+
+    IKeyboard *IKeyboard::getInstance()
+    {
+        if (!m_instance)
+        {
+#if defined(Q_OS_WIN)
+            m_instance = new CKeyboardWindows;
+#elif defined(Q_OS_OSX)
+#elif defined(Q_OS_LINUX)
+#endif
+            Q_ASSERT_X(m_instance, "IKeyboard::getInstance", "Pointer to IKeyboard is NULL!");
+            m_instance->init();
+        }
+        return m_instance;
+    }
+
+    bool operator==(IKeyboard::RegistrationHandle const &lhs, IKeyboard::RegistrationHandle const &rhs)
+    {
+        if ((lhs.m_key == rhs.m_key) && (lhs.m_receiver == rhs.m_receiver))
+            return true;
+        else
+            return false;
+    }
+
+} // BlackCore