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diff --git a/vncviewer/GestureEvent.h b/vncviewer/GestureEvent.h
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+/* Copyright 2019 Aaron Sowry for Cendio AB
+ * Copyright 2020 Samuel Mannehed for Cendio AB
+ * 
+ * This 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 software 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 software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __GESTUREEVENT_H__
+#define __GESTUREEVENT_H__
+
+enum GestureEventGesture {
+  GestureOneTap,
+  GestureTwoTap,
+  GestureThreeTap,
+  GestureDrag,
+  GestureLongPress,
+  GestureTwoDrag,
+  GesturePinch,
+};
+
+enum GestureEventType {
+  GestureBegin,
+  GestureUpdate,
+  GestureEnd,
+};
+
+// magnitude is used by two gestures:
+//  GestureTwoDrag: distance moved since GestureBegin
+//  GesturePinch: distance between fingers
+struct GestureEvent {
+  double eventX;
+  double eventY;
+  double magnitudeX;
+  double magnitudeY;
+  GestureEventGesture gesture;
+  GestureEventType type;
+};
+
+#endif // __GESTUREEVENT_H__