| // Copyright (c) 2012 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. |
| |
| #ifndef UI_AURA_ENV_H_ |
| #define UI_AURA_ENV_H_ |
| |
| #include "base/memory/scoped_ptr.h" |
| #include "base/observer_list.h" |
| #include "base/supports_user_data.h" |
| #include "ui/aura/aura_export.h" |
| #include "ui/events/event_handler.h" |
| #include "ui/events/event_target.h" |
| #include "ui/gfx/geometry/point.h" |
| |
| namespace ui { |
| class ContextFactory; |
| class PlatformEventSource; |
| } |
| namespace aura { |
| |
| namespace test { |
| class EnvTestHelper; |
| } |
| |
| class EnvObserver; |
| class InputStateLookup; |
| class Window; |
| class WindowTreeHost; |
| |
| // A singleton object that tracks general state within Aura. |
| class AURA_EXPORT Env : public ui::EventTarget, public base::SupportsUserData { |
| public: |
| // Creates the single Env instance (if it hasn't been created yet). If |
| // |create_event_source| is true a PlatformEventSource is created. |
| // TODO(sky): nuke |create_event_source|. Only necessary while mojo's |
| // nativeviewportservice lives in the same process as the viewmanager. |
| static void CreateInstance(bool create_event_source); |
| static Env* GetInstance(); |
| static void DeleteInstance(); |
| |
| void AddObserver(EnvObserver* observer); |
| void RemoveObserver(EnvObserver* observer); |
| |
| int mouse_button_flags() const { return mouse_button_flags_; } |
| void set_mouse_button_flags(int mouse_button_flags) { |
| mouse_button_flags_ = mouse_button_flags; |
| } |
| // Returns true if a mouse button is down. This may query the native OS, |
| // otherwise it uses |mouse_button_flags_|. |
| bool IsMouseButtonDown() const; |
| |
| // Gets/sets the last mouse location seen in a mouse event in the screen |
| // coordinates. |
| const gfx::Point& last_mouse_location() const { return last_mouse_location_; } |
| void set_last_mouse_location(const gfx::Point& last_mouse_location) { |
| last_mouse_location_ = last_mouse_location; |
| } |
| |
| // Whether any touch device is currently down. |
| bool is_touch_down() const { return is_touch_down_; } |
| void set_touch_down(bool value) { is_touch_down_ = value; } |
| |
| void set_context_factory(ui::ContextFactory* context_factory) { |
| context_factory_ = context_factory; |
| } |
| ui::ContextFactory* context_factory() { return context_factory_; } |
| |
| private: |
| friend class test::EnvTestHelper; |
| friend class Window; |
| friend class WindowTreeHost; |
| |
| Env(); |
| ~Env() override; |
| |
| // See description of CreateInstance() for deatils of |create_event_source|. |
| void Init(bool create_event_source); |
| |
| // Called by the Window when it is initialized. Notifies observers. |
| void NotifyWindowInitialized(Window* window); |
| |
| // Called by the WindowTreeHost when it is initialized. Notifies observers. |
| void NotifyHostInitialized(WindowTreeHost* host); |
| |
| // Invoked by WindowTreeHost when it is activated. Notifies observers. |
| void NotifyHostActivated(WindowTreeHost* host); |
| |
| // Overridden from ui::EventTarget: |
| bool CanAcceptEvent(const ui::Event& event) override; |
| ui::EventTarget* GetParentTarget() override; |
| scoped_ptr<ui::EventTargetIterator> GetChildIterator() const override; |
| ui::EventTargeter* GetEventTargeter() override; |
| |
| ObserverList<EnvObserver> observers_; |
| |
| int mouse_button_flags_; |
| // Location of last mouse event, in screen coordinates. |
| gfx::Point last_mouse_location_; |
| bool is_touch_down_; |
| |
| scoped_ptr<InputStateLookup> input_state_lookup_; |
| scoped_ptr<ui::PlatformEventSource> event_source_; |
| |
| ui::ContextFactory* context_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(Env); |
| }; |
| |
| } // namespace aura |
| |
| #endif // UI_AURA_ENV_H_ |