| // Copyright 2018 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 CHROMECAST_GRAPHICS_GESTURES_MULTIPLE_TAP_DETECTOR_H_ |
| #define CHROMECAST_GRAPHICS_GESTURES_MULTIPLE_TAP_DETECTOR_H_ |
| |
| #include <deque> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/timer/timer.h" |
| #include "base/values.h" |
| #include "ui/events/event.h" |
| #include "ui/events/event_rewriter.h" |
| #include "ui/events/gesture_detection/gesture_detector.h" |
| #include "ui/events/gestures/gesture_provider_aura.h" |
| #include "ui/gfx/geometry/point.h" |
| |
| namespace aura { |
| class Window; |
| } |
| |
| namespace ui { |
| class Event; |
| class TouchEvent; |
| } // namespace ui |
| |
| namespace chromecast { |
| |
| class MultipleTapDetectorDelegate { |
| public: |
| virtual ~MultipleTapDetectorDelegate() = default; |
| virtual void OnTripleTap(const gfx::Point& touch_location) = 0; |
| virtual void OnDoubleTap(const gfx::Point& touch_location) {} |
| }; |
| |
| enum class MultiTapState { |
| NONE, |
| TOUCH, |
| INTERVAL_WAIT, |
| }; |
| |
| // An event rewriter responsible for detecting triple-tap or double-tap events |
| // on the root window. |
| class MultipleTapDetector : public ui::EventRewriter { |
| public: |
| MultipleTapDetector(aura::Window* root_window, |
| MultipleTapDetectorDelegate* delegate); |
| ~MultipleTapDetector() override; |
| |
| void set_enabled(bool enabled) { enabled_ = enabled; } |
| bool enabled() const { return enabled_; } |
| |
| // Overridden from ui::EventRewriter |
| ui::EventRewriteStatus RewriteEvent( |
| const ui::Event& event, |
| std::unique_ptr<ui::Event>* rewritten_event) override; |
| ui::EventRewriteStatus NextDispatchEvent( |
| const ui::Event& last_event, |
| std::unique_ptr<ui::Event>* new_event) override; |
| |
| private: |
| friend class MultipleTapDetectorTest; |
| |
| // Expiration event for maximum time between taps in a tap. |
| void OnTapIntervalTimerFired(); |
| // Expiration event for a finger that is pressed too long during a multi tap. |
| void OnLongPressIntervalTimerFired(); |
| void TapDetectorStateReset(); |
| |
| void DispatchEvent(ui::TouchEvent* event); |
| |
| // A default gesture detector config, so we can share the same |
| // timeout and pixel slop constants. |
| ui::GestureDetector::Config gesture_detector_config_; |
| |
| aura::Window* root_window_; |
| MultipleTapDetectorDelegate* delegate_; |
| |
| bool enabled_; |
| |
| MultiTapState tap_state_; |
| int tap_count_; |
| gfx::Point last_tap_location_; |
| base::OneShotTimer triple_tap_timer_; |
| std::deque<ui::TouchEvent> stashed_events_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MultipleTapDetector); |
| }; |
| |
| } // namespace chromecast |
| |
| #endif // CHROMECAST_GRAPHICS_GESTURES_MULTIPLE_TAP_DETECTOR_H_ |