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| 1 // Copyright 2015 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. | |
| 4 | |
| 5 #ifndef CONTENT_BROWSER_WEB_CONTENTS_AURA_OVERSCROLL_WINDOW_DELEGATE_H_ | |
| 6 #define CONTENT_BROWSER_WEB_CONTENTS_AURA_OVERSCROLL_WINDOW_DELEGATE_H_ | |
| 7 | |
| 8 #include "content/browser/renderer_host/overscroll_controller.h" | |
| 9 #include "content/browser/web_contents/aura/overscroll_navigation_overlay.h" | |
| 10 #include "content/browser/web_contents/web_contents_impl.h" | |
| 11 #include "ui/aura_extra/image_window_delegate.h" | |
| 12 | |
| 13 namespace content { | |
| 14 | |
| 15 // The window delegate for the overscroll window. This processes UI trackpad and | |
| 16 // touch events and converts them to overscroll event. The delegate destroys | |
| 17 // itself when the window is destroyed. | |
| 18 class CONTENT_EXPORT OverscrollWindowDelegate | |
| 19 : public aura_extra::ImageWindowDelegate { | |
| 20 public: | |
| 21 OverscrollWindowDelegate(OverscrollControllerDelegate* delegate, | |
| 22 const gfx::Image& image); | |
| 23 | |
| 24 private: | |
| 25 FRIEND_TEST_ALL_PREFIXES(OverscrollWindowDelegateTest, BasicOverscrollModes); | |
| 26 | |
| 27 ~OverscrollWindowDelegate() override; | |
| 28 | |
| 29 // Starts the overscroll gesture. | |
| 30 void StartOverscroll(); | |
| 31 | |
| 32 // Resets the overscroll state. | |
| 33 void ResetOverscroll(); | |
| 34 | |
| 35 // Completes or resets the overscroll from the current state. | |
| 36 void CompleteOrResetOverscroll(); | |
| 37 | |
| 38 // Updates the current horizontal overscroll. | |
| 39 void UpdateOverscroll(float delta_x); | |
| 40 | |
| 41 // Overridden from ui::EventHandler. | |
| 42 void OnKeyEvent(ui::KeyEvent* event) override; | |
| 43 void OnMouseEvent(ui::MouseEvent* event) override; | |
| 44 void OnScrollEvent(ui::ScrollEvent* event) override; | |
| 45 void OnGestureEvent(ui::GestureEvent* event) override; | |
| 46 | |
| 47 // Delegate to which we forward overscroll events. | |
| 48 OverscrollControllerDelegate* delegate_; | |
| 49 | |
| 50 // The current overscroll mode. | |
| 51 OverscrollMode overscroll_mode_; | |
| 52 | |
| 53 // The latest delta_x scroll update. | |
| 54 float delta_x_; | |
| 55 | |
| 56 // The ratio of overscroll at which we consider the overscroll completed. | |
| 57 const float complete_threshold_ratio_; | |
| 58 | |
| 59 // The threshold for starting the overscroll gesture, for touchscreen or | |
| 60 // touchpads. | |
| 61 const float start_threshold_touchscreen_; | |
| 62 const float start_threshold_touchpad_; | |
| 63 | |
| 64 // The threshold for starting the overscroll gesture for the current touch | |
| 65 // input. | |
| 66 float active_start_threshold_; | |
| 67 | |
| 68 DISALLOW_COPY_AND_ASSIGN(OverscrollWindowDelegate); | |
| 69 }; | |
| 70 | |
| 71 } // namespace content | |
| 72 | |
| 73 #endif // CONTENT_BROWSER_WEB_CONTENTS_AURA_OVERSCROLL_WINDOW_DELEGATE_H_ | |
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Chromium Code Reviews
Issue 1076743003:
Revert of Refactor GestureNavigation to eliminate code redundancy (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master