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 17namespace ui { 18 19class Event; 20class EventDeviceInfo; 21class EventModifiersEvdev; 22class CursorDelegateEvdev; 23 24typedef 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. 39class 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 OnGestureContactInitiated(const Gesture* gesture); 63 void OnGestureFling(const Gesture* gesture, const GestureFling* fling); 64 void OnGestureSwipe(const Gesture* gesture, const GestureSwipe* swipe); 65 void OnGestureSwipeLift(const Gesture* gesture, 66 const GestureSwipeLift* swipelift); 67 void OnGesturePinch(const Gesture* gesture, const GesturePinch* pinch); 68 void OnGestureMetrics(const Gesture* gesture, const GestureMetrics* metrics); 69 70 void Dispatch(Event* event); 71 void DispatchMouseButton(unsigned int modifier, bool down); 72 73 // Shared modifier state. 74 EventModifiersEvdev* modifiers_; 75 76 // Shared cursor state. 77 CursorDelegateEvdev* cursor_; 78 79 // Callback for dispatching events. 80 EventDispatchCallback dispatch_callback_; 81 82 // Gestures interpretation state. 83 gestures::GestureInterpreter* interpreter_; 84 85 DISALLOW_COPY_AND_ASSIGN(GestureInterpreterLibevdevCros); 86}; 87 88} // namspace ui 89 90#endif // UI_EVENTS_OZONE_EVDEV_LIBGESTURES_GLUE_GESTURE_INTERPRETER_LIBEVDEV_CROS_H_ 91