1 files changed, 81 insertions, 0 deletions
diff --git a/vncviewer/GestureHandler.h b/vncviewer/GestureHandler.h
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+++ b/vncviewer/GestureHandler.h
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+/* Copyright 2019 Aaron Sowry for Cendio AB
+ * Copyright 2020 Pierre Ossman 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 __GESTUREHANDLER_H__
+#define __GESTUREHANDLER_H__
+
+#include <set>
+#include <map>
+
+#include <rfb/Timer.h>
+
+#include "GestureEvent.h"
+
+class GestureHandler : public rfb::Timer::Callback {
+  public:
+    GestureHandler();
+    virtual ~GestureHandler();
+
+    void handleTouchBegin(int id, double x, double y);
+    void handleTouchUpdate(int id, double x, double y);
+    void handleTouchEnd(int id);
+
+  protected:
+    virtual void handleGestureEvent(const GestureEvent& event) = 0;
+
+  private:
+    bool hasDetectedGesture();
+
+    virtual bool handleTimeout(rfb::Timer* t);
+    void longpressTimeout();
+    void twoTouchTimeout();
+
+    void pushEvent(GestureEventType t);
+    GestureEventGesture stateToGesture(unsigned char state);
+
+    void getPosition(double *firstX, double *firstY,
+                     double *lastX, double *lastY);
+    void getAverageMovement(double *h, double *v);
+    void getAverageDistance(double *firstX, double *firstY,
+                            double *lastX, double *lastY);
+
+  private:
+    struct GHTouch {
+      struct timeval started;
+      bool active;
+      double firstX;
+      double firstY;
+      double lastX;
+      double lastY;
+      int angle;
+    };
+
+    unsigned char state;
+
+    std::map<int, GHTouch> tracked;
+    std::set<int> ignored;
+
+    bool waitingRelease;
+    struct timeval releaseStart;
+
+    rfb::Timer longpressTimer;
+    rfb::Timer twoTouchTimer;
+};
+
+#endif // __GESTUREHANDLER_H__