| // 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 ASH_TOUCH_TOUCH_OBSERVER_HUD_H_ |
| #define ASH_TOUCH_TOUCH_OBSERVER_HUD_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <string> |
| |
| #include "ash/ash_export.h" |
| #include "ash/display/window_tree_host_manager.h" |
| #include "base/macros.h" |
| #include "base/values.h" |
| #include "ui/display/display_observer.h" |
| #include "ui/display/manager/display_configurator.h" |
| #include "ui/events/event_handler.h" |
| #include "ui/views/widget/widget_observer.h" |
| |
| namespace views { |
| class Label; |
| class View; |
| class Widget; |
| } |
| |
| namespace ash { |
| class TouchHudCanvas; |
| class TouchLog; |
| |
| // A heads-up display to show touch traces on the screen and log touch events. |
| // Implemented as an event filter which handles system level gesture events. |
| // Objects of this class manage their own lifetime. |
| class ASH_EXPORT TouchObserverHUD |
| : public ui::EventHandler, |
| public views::WidgetObserver, |
| public display::DisplayObserver, |
| public display::DisplayConfigurator::Observer, |
| public WindowTreeHostManager::Observer { |
| public: |
| enum Mode { |
| FULLSCREEN, |
| REDUCED_SCALE, |
| INVISIBLE, |
| }; |
| |
| explicit TouchObserverHUD(aura::Window* initial_root); |
| ~TouchObserverHUD() override; |
| |
| // Clears touch points and traces from the screen. |
| void Clear(); |
| |
| // Removes the HUD from the screen. |
| void Remove(); |
| |
| // Returns the log of touch events for all displays as a dictionary mapping id |
| // of each display to its touch log. |
| static std::unique_ptr<base::DictionaryValue> GetAllAsDictionary(); |
| |
| // Changes the display mode (e.g. scale, visibility). Calling this repeatedly |
| // cycles between a fixed number of display modes. |
| void ChangeToNextMode(); |
| |
| // Returns log of touch events as a list value. Each item in the list is a |
| // trace of one touch point. |
| std::unique_ptr<base::ListValue> GetLogAsList() const; |
| |
| // ui::EventHandler: |
| void OnTouchEvent(ui::TouchEvent* event) override; |
| |
| // views::WidgetObserver: |
| void OnWidgetDestroying(views::Widget* widget) override; |
| |
| // display::DisplayObserver: |
| void OnDisplayRemoved(const display::Display& old_display) override; |
| void OnDisplayMetricsChanged(const display::Display& display, |
| uint32_t metrics) override; |
| |
| // display::DisplayConfigurator::Observer: |
| void OnDisplayModeChanged( |
| const display::DisplayConfigurator::DisplayStateList& outputs) override; |
| |
| // WindowTreeHostManager::Observer: |
| void OnDisplaysInitialized() override; |
| void OnDisplayConfigurationChanging() override; |
| void OnDisplayConfigurationChanged() override; |
| |
| private: |
| friend class TouchObserverHUDTest; |
| |
| void SetMode(Mode mode); |
| |
| void UpdateTouchPointLabel(int index); |
| |
| const int64_t display_id_; |
| aura::Window* root_window_; |
| views::Widget* widget_; |
| |
| static constexpr int kMaxTouchPoints = 32; |
| |
| Mode mode_; |
| |
| std::unique_ptr<TouchLog> touch_log_; |
| |
| TouchHudCanvas* canvas_; |
| views::View* label_container_; |
| views::Label* touch_labels_[kMaxTouchPoints]; |
| |
| DISALLOW_COPY_AND_ASSIGN(TouchObserverHUD); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_TOUCH_TOUCH_OBSERVER_HUD_H_ |