blob: 12fee961b7a75d23104c9b784dc49ad6398627d2 [file] [log] [blame]
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#pragma once
#include "base/memory/singleton.h"
#include "views/view.h"
namespace ui {
enum TouchStatus;
namespace views {
class TouchEvent;
// A GestureManager singleton detects gestures occurring in the
// incoming feed of touch events across all of the RootViews in
// the system. In response to a given touch event, the GestureManager
// updates its internal state and optionally dispatches synthetic
// events to the invoking view.
class VIEWS_EXPORT GestureManager {
virtual ~GestureManager();
static GestureManager* GetInstance();
// Invoked for each touch event that could contribute to the current gesture.
// Takes the event and the View that originated it and which will also
// be the target of any generated synthetic event. Finally, status
// specifies if a touch sequence is in progress or not, so that the
// GestureManager state can correctly reflect events that are handled
// already.
// Returns true if the event resulted in firing a synthetic event.
virtual bool ProcessTouchEventForGesture(const TouchEvent& event,
View* source,
ui::TouchStatus status);
// TODO(rjkroege): Write the remainder of this class.
// It will appear in a subsequent CL.
friend struct DefaultSingletonTraits<GestureManager>;
} // namespace views