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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef UI_APP_LIST_PAGINATION_MODEL_H_ | 5 #ifndef UI_APP_LIST_PAGINATION_MODEL_H_ |
| 6 #define UI_APP_LIST_PAGINATION_MODEL_H_ | 6 #define UI_APP_LIST_PAGINATION_MODEL_H_ |
| 7 | 7 |
| 8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
| 9 #include "base/compiler_specific.h" | 9 #include "base/compiler_specific.h" |
| 10 #include "base/memory/scoped_ptr.h" | 10 #include "base/memory/scoped_ptr.h" |
| 11 #include "base/observer_list.h" | 11 #include "base/observer_list.h" |
| 12 #include "base/time/time.h" | 12 #include "base/time/time.h" |
| 13 #include "ui/app_list/app_list_export.h" | 13 #include "ui/app_list/app_list_export.h" |
| 14 #include "ui/base/animation/animation_delegate.h" | 14 #include "ui/gfx/animation/animation_delegate.h" |
| 15 | 15 |
| 16 namespace ui { | 16 namespace gfx { |
| 17 class SlideAnimation; | 17 class SlideAnimation; |
| 18 } | 18 } |
| 19 | 19 |
| 20 namespace app_list { | 20 namespace app_list { |
| 21 | 21 |
| 22 class PaginationModelObserver; | 22 class PaginationModelObserver; |
| 23 | 23 |
| 24 // A simple pagination model that consists of two numbers: the total pages and | 24 // A simple pagination model that consists of two numbers: the total pages and |
| 25 // the currently selected page. The model is a single selection model that at | 25 // the currently selected page. The model is a single selection model that at |
| 26 // the most one page can become selected at any time. | 26 // the most one page can become selected at any time. |
| 27 class APP_LIST_EXPORT PaginationModel : public ui::AnimationDelegate { | 27 class APP_LIST_EXPORT PaginationModel : public gfx::AnimationDelegate { |
| 28 public: | 28 public: |
| 29 // Holds info for transition animation and touch scroll. | 29 // Holds info for transition animation and touch scroll. |
| 30 struct Transition { | 30 struct Transition { |
| 31 Transition(int target_page, double progress) | 31 Transition(int target_page, double progress) |
| 32 : target_page(target_page), | 32 : target_page(target_page), |
| 33 progress(progress) { | 33 progress(progress) { |
| 34 } | 34 } |
| 35 | 35 |
| 36 bool Equals(const Transition& rhs) const { | 36 bool Equals(const Transition& rhs) const { |
| 37 return target_page == rhs.target_page && progress == rhs.progress; | 37 return target_page == rhs.target_page && progress == rhs.progress; |
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| 106 // When there is no transition, current page is the currently selected page. | 106 // When there is no transition, current page is the currently selected page. |
| 107 // If there is a transition, current page is the transition target page or the | 107 // If there is a transition, current page is the transition target page or the |
| 108 // pending transition target page. When current page + |delta| goes beyond | 108 // pending transition target page. When current page + |delta| goes beyond |
| 109 // valid range and |selected_page_| is at the range ends, invalid page number | 109 // valid range and |selected_page_| is at the range ends, invalid page number |
| 110 // -1 or |total_pages_| is returned to indicate the situation. | 110 // -1 or |total_pages_| is returned to indicate the situation. |
| 111 int CalculateTargetPage(int delta) const; | 111 int CalculateTargetPage(int delta) const; |
| 112 | 112 |
| 113 void StartTransitionAnimation(const Transition& transition); | 113 void StartTransitionAnimation(const Transition& transition); |
| 114 void ResetTransitionAnimation(); | 114 void ResetTransitionAnimation(); |
| 115 | 115 |
| 116 // ui::AnimationDelegate overrides: | 116 // gfx::AnimationDelegate overrides: |
| 117 virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE; | 117 virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE; |
| 118 virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE; | 118 virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE; |
| 119 | 119 |
| 120 int total_pages_; | 120 int total_pages_; |
| 121 int selected_page_; | 121 int selected_page_; |
| 122 | 122 |
| 123 Transition transition_; | 123 Transition transition_; |
| 124 | 124 |
| 125 // Pending selected page when SelectedPage is called during a transition. If | 125 // Pending selected page when SelectedPage is called during a transition. If |
| 126 // multiple SelectPage is called while a transition is in progress, only the | 126 // multiple SelectPage is called while a transition is in progress, only the |
| 127 // last target page is remembered here. | 127 // last target page is remembered here. |
| 128 int pending_selected_page_; | 128 int pending_selected_page_; |
| 129 | 129 |
| 130 scoped_ptr<ui::SlideAnimation> transition_animation_; | 130 scoped_ptr<gfx::SlideAnimation> transition_animation_; |
| 131 int transition_duration_ms_; // Transition duration in millisecond. | 131 int transition_duration_ms_; // Transition duration in millisecond. |
| 132 int overscroll_transition_duration_ms_; | 132 int overscroll_transition_duration_ms_; |
| 133 | 133 |
| 134 int last_overscroll_target_page_; | 134 int last_overscroll_target_page_; |
| 135 base::TimeTicks last_overscroll_animation_start_time_; | 135 base::TimeTicks last_overscroll_animation_start_time_; |
| 136 | 136 |
| 137 ObserverList<PaginationModelObserver> observers_; | 137 ObserverList<PaginationModelObserver> observers_; |
| 138 | 138 |
| 139 DISALLOW_COPY_AND_ASSIGN(PaginationModel); | 139 DISALLOW_COPY_AND_ASSIGN(PaginationModel); |
| 140 }; | 140 }; |
| 141 | 141 |
| 142 } // namespace app_list | 142 } // namespace app_list |
| 143 | 143 |
| 144 #endif // UI_APP_LIST_PAGINATION_MODEL_H_ | 144 #endif // UI_APP_LIST_PAGINATION_MODEL_H_ |
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