QtUtils: Add BlockUserInputFilter

Source/Core/DolphinQt2/QtUtils/BlockUserInputFilter.cpp

@@ -0,0 +1,21 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "DolphinQt2/QtUtils/BlockUserInputFilter.h"
+
+#include <QEvent>
+
+BlockUserInputFilter* BlockUserInputFilter::Instance()
+{
+  static BlockUserInputFilter s_block_user_input_filter;
+  return &s_block_user_input_filter;
+}
+
+bool BlockUserInputFilter::eventFilter(QObject* object, QEvent* event)
+{
+  const QEvent::Type event_type = event->type();
+  return event_type == QEvent::KeyPress || event_type == QEvent::KeyRelease ||
+         event_type == QEvent::MouseButtonPress || event_type == QEvent::MouseButtonRelease ||
+         event_type == QEvent::MouseButtonDblClick;
+}

Source/Core/DolphinQt2/QtUtils/BlockUserInputFilter.h

@@ -0,0 +1,19 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QObject>
+
+class QEvent;
+
+class BlockUserInputFilter : public QObject
+{
+public:
+  static BlockUserInputFilter* Instance();
+
+private:
+  BlockUserInputFilter() = default;
+  bool eventFilter(QObject* object, QEvent* event) override;
+};