1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_EVENTS_OZONE_EVDEV_LIBGESTURES_GLUE_GESTURE_INTERPRETER_LIBEVDEV_CROS_H_ 6 #define UI_EVENTS_OZONE_EVDEV_LIBGESTURES_GLUE_GESTURE_INTERPRETER_LIBEVDEV_CROS_H_ 7 8 #include <gestures/gestures.h> 9 #include <libevdev/libevdev.h> 10 11 #include "base/callback.h" 12 #include "base/memory/scoped_ptr.h" 13 #include "ui/events/ozone/evdev/cursor_delegate_evdev.h" 14 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h" 15 #include "ui/events/ozone/evdev/libgestures_glue/event_reader_libevdev_cros.h" 16 17 namespace ui { 18 19 class Event; 20 class EventDeviceInfo; 21 class EventModifiersEvdev; 22 class CursorDelegateEvdev; 23 24 typedef base::Callback<void(Event*)> EventDispatchCallback; 25 26 // Convert libevdev-cros events to ui::Events using libgestures. 27 // 28 // This builds a GestureInterpreter for an input device (touchpad or 29 // mouse). 30 // 31 // Raw input events must be preprocessed into a form suitable for 32 // libgestures. The kernel protocol only emits changes to the device state, 33 // so changes must be accumulated until a sync event. The full device state 34 // at sync is then processed by libgestures. 35 // 36 // Once we have the state at sync, we convert it to a HardwareState object 37 // and forward it to libgestures. If any gestures are produced, they are 38 // converted to ui::Events and dispatched. 39 class EVENTS_OZONE_EVDEV_EXPORT GestureInterpreterLibevdevCros 40 : public EventReaderLibevdevCros::Delegate { 41 public: 42 GestureInterpreterLibevdevCros(EventModifiersEvdev* modifiers, 43 CursorDelegateEvdev* cursor, 44 const EventDispatchCallback& callback); 45 virtual ~GestureInterpreterLibevdevCros(); 46 47 // Overriden from ui::EventReaderLibevdevCros::Delegate 48 virtual void OnLibEvdevCrosOpen(Evdev* evdev, 49 EventStateRec* evstate) OVERRIDE; 50 virtual void OnLibEvdevCrosEvent(Evdev* evdev, 51 EventStateRec* evstate, 52 const timeval& time) OVERRIDE; 53 54 // Handler for gesture events generated from libgestures. 55 void OnGestureReady(const Gesture* gesture); 56 57 private: 58 void OnGestureMove(const Gesture* gesture, const GestureMove* move); 59 void OnGestureScroll(const Gesture* gesture, const GestureScroll* move); 60 void OnGestureButtonsChange(const Gesture* gesture, 61 const GestureButtonsChange* move); 62 void Dispatch(Event* event); 63 void DispatchMouseButton(unsigned int modifier, bool down); 64 65 // Shared modifier state. 66 EventModifiersEvdev* modifiers_; 67 68 // Shared cursor state. 69 CursorDelegateEvdev* cursor_; 70 71 // Callback for dispatching events. 72 EventDispatchCallback dispatch_callback_; 73 74 // Gestures interpretation state. 75 gestures::GestureInterpreter* interpreter_; 76 77 DISALLOW_COPY_AND_ASSIGN(GestureInterpreterLibevdevCros); 78 }; 79 80 } // namspace ui 81 82 #endif // UI_EVENTS_OZONE_EVDEV_LIBGESTURES_GLUE_GESTURE_INTERPRETER_LIBEVDEV_CROS_H_ 83