diff --git a/libs/ui/KisMouseClickEater.cpp b/libs/ui/KisMouseClickEater.cpp
index 8641a0bb60..eea726bd8c 100644
--- a/libs/ui/KisMouseClickEater.cpp
+++ b/libs/ui/KisMouseClickEater.cpp
@@ -1,70 +1,88 @@
+/*
+ *  Copyright (c) 2019 Dmitry Kazakov <dimula73@gmail.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
 #include "KisMouseClickEater.h"
 
 #include <QMouseEvent>
 #include "kis_debug.h"
 
 KisMouseClickEater::KisMouseClickEater(Qt::MouseButtons buttons,
                                        int clicksToEat,
                                        QObject *parent)
     : QObject(parent),
       m_buttons(buttons),
       m_clicksToEat(clicksToEat)
 {
     reset();
 }
 
 KisMouseClickEater::~KisMouseClickEater()
 {
 }
 
 void KisMouseClickEater::reset()
 {
     m_clicksHappened = 0;
     m_timeSinceReset.start();
     m_blockTimedRelease = false;
 }
 
 bool KisMouseClickEater::eventFilter(QObject *watched, QEvent *event)
 {
 #ifdef Q_OS_WIN
     const int tabletMouseEventsFlowDelay = 500;
 #else
     const int tabletMouseEventsFlowDelay = 100;
 #endif
 
     if (event->type() == QEvent::TabletMove) {
         m_blockTimedRelease = true;
     }
 
     if (!m_blockTimedRelease &&
         m_timeSinceReset.elapsed() > tabletMouseEventsFlowDelay) {
 
         return QObject::eventFilter(watched, event);
     }
 
     if (event->type() == QEvent::MouseButtonPress ||
         event->type() == QEvent::MouseButtonRelease) {
 
         QMouseEvent *mevent = static_cast<QMouseEvent*>(event);
         if (mevent->button() & m_buttons) {
             if (m_clicksHappened >= m_clicksToEat) {
                 return false;
             }
 
             if (event->type() == QEvent::MouseButtonRelease) {
                 m_clicksHappened++;
             }
 
             return true;
         }
     }
 
     if (event->type() == QEvent::MouseMove) {
         QMouseEvent *mevent = static_cast<QMouseEvent*>(event);
         if (mevent->buttons() & m_buttons) {
             return m_clicksHappened < m_clicksToEat;
         }
     }
 
     return QObject::eventFilter(watched, event);
 }
diff --git a/libs/ui/KisMouseClickEater.h b/libs/ui/KisMouseClickEater.h
index eaa470aaab..ec5054e63b 100644
--- a/libs/ui/KisMouseClickEater.h
+++ b/libs/ui/KisMouseClickEater.h
@@ -1,29 +1,47 @@
+/*
+ *  Copyright (c) 2019 Dmitry Kazakov <dimula73@gmail.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
 #ifndef KISMOUSECLICKEATER_H
 #define KISMOUSECLICKEATER_H
 
 #include <QtGlobal>
 #include <QObject>
 #include <QElapsedTimer>
 
 
 class KisMouseClickEater : public QObject
 {
 public:
     KisMouseClickEater(Qt::MouseButtons buttons,
                        int clicksToEat = 1,
                        QObject *parent = 0);
 
     ~KisMouseClickEater();
 
     void reset();
     bool eventFilter(QObject *watched, QEvent *event) override;
 
 private:
     Qt::MouseButtons m_buttons = Qt::NoButton;
     int m_clicksToEat = 1;
     int m_clicksHappened = 0;
     bool m_blockTimedRelease = false;
     QElapsedTimer m_timeSinceReset;
 };
 
 #endif // KISMOUSECLICKEATER_H