1 // Copyright (c) 2012 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.
8 #include "base/memory/scoped_ptr.h"
9 #include "base/observer_list.h"
10 #include "ui/aura/aura_export.h"
11 #include "ui/events/event_handler.h"
12 #include "ui/events/event_target.h"
13 #include "ui/gfx/point.h"
16 #include "ui/aura/device_list_updater_aurax11.h"
26 class InputStateLookup;
30 // A singleton object that tracks general state within Aura.
31 // TODO(beng): manage RootWindows.
32 class AURA_EXPORT Env : public ui::EventTarget {
37 static void CreateInstance();
38 static Env* GetInstance();
39 static void DeleteInstance();
41 void AddObserver(EnvObserver* observer);
42 void RemoveObserver(EnvObserver* observer);
44 void set_mouse_button_flags(int mouse_button_flags) {
45 mouse_button_flags_ = mouse_button_flags;
47 // Returns true if a mouse button is down. This may query the native OS,
48 // otherwise it uses |mouse_button_flags_|.
49 bool IsMouseButtonDown() const;
51 // Gets/sets the last mouse location seen in a mouse event in the screen
53 const gfx::Point& last_mouse_location() const { return last_mouse_location_; }
54 void set_last_mouse_location(const gfx::Point& last_mouse_location) {
55 last_mouse_location_ = last_mouse_location;
58 // Whether any touch device is currently down.
59 bool is_touch_down() const { return is_touch_down_; }
60 void set_touch_down(bool value) { is_touch_down_ = value; }
62 // Invoked by RootWindow when its host is activated.
63 void RootWindowActivated(RootWindow* root_window);
66 friend class test::EnvTestHelper;
68 friend class WindowTreeHost;
72 // Called by the Window when it is initialized. Notifies observers.
73 void NotifyWindowInitialized(Window* window);
75 // Called by the RootWindow when it is initialized. Notifies observers.
76 void NotifyRootWindowInitialized(RootWindow* root_window);
78 // Overridden from ui::EventTarget:
79 virtual bool CanAcceptEvent(const ui::Event& event) OVERRIDE;
80 virtual ui::EventTarget* GetParentTarget() OVERRIDE;
81 virtual scoped_ptr<ui::EventTargetIterator> GetChildIterator() const OVERRIDE;
82 virtual ui::EventTargeter* GetEventTargeter() OVERRIDE;
84 ObserverList<EnvObserver> observers_;
86 static Env* instance_;
87 int mouse_button_flags_;
88 // Location of last mouse event, in screen coordinates.
89 gfx::Point last_mouse_location_;
93 DeviceListUpdaterAuraX11 device_list_updater_aurax11_;
96 scoped_ptr<InputStateLookup> input_state_lookup_;
98 DISALLOW_COPY_AND_ASSIGN(Env);
103 #endif // UI_AURA_ENV_H_