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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DETAILS_H_ | 5 #ifndef UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DETAILS_H_ |
6 #define UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DETAILS_H_ | 6 #define UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DETAILS_H_ |
7 | 7 |
8 #include <string.h> | 8 #include <string.h> |
9 | 9 |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
11 #include "ui/events/event_constants.h" | 11 #include "ui/events/event_constants.h" |
12 #include "ui/events/events_base_export.h" | 12 #include "ui/events/events_base_export.h" |
13 #include "ui/gfx/geometry/rect.h" | 13 #include "ui/gfx/geometry/rect.h" |
14 #include "ui/gfx/geometry/rect_conversions.h" | 14 #include "ui/gfx/geometry/rect_conversions.h" |
15 | 15 |
16 namespace ui { | 16 namespace ui { |
17 | 17 |
18 struct EVENTS_BASE_EXPORT GestureEventDetails { | 18 struct EVENTS_BASE_EXPORT GestureEventDetails { |
19 public: | 19 public: |
20 // The definition of ScrollUnits below is consistent with that in | |
21 // //src/third_party/WebKit/public/platform/WebGestureEvent.h | |
22 enum class ScrollUnits { | |
23 PRECISE_PIXELS = 0, // generated by high precision devices. | |
24 PIXELS, // large pixel jump duration; should animate to delta. | |
sky
2017/02/17 22:52:31
Are you sure this isn't DIPs and what you are call
chengx
2017/02/17 23:19:18
I agree the names here, which originate from WebGe
| |
25 PAGE // page (visible viewport) based scrolling. | |
26 }; | |
27 | |
20 GestureEventDetails(); | 28 GestureEventDetails(); |
21 explicit GestureEventDetails(EventType type); | 29 explicit GestureEventDetails(EventType type); |
22 GestureEventDetails(EventType type, float delta_x, float delta_y); | 30 |
31 // ScrollUnits::PRECISE_PIXELS is the default in WebGestureEvent.h too. | |
32 GestureEventDetails(EventType type, | |
33 float delta_x, | |
34 float delta_y, | |
35 ScrollUnits units = ScrollUnits::PRECISE_PIXELS); | |
23 | 36 |
24 // The caller is responsible for ensuring that the gesture data from |other| | 37 // The caller is responsible for ensuring that the gesture data from |other| |
25 // is compatible and sufficient for that expected by gestures of |type|. | 38 // is compatible and sufficient for that expected by gestures of |type|. |
26 GestureEventDetails(EventType type, const GestureEventDetails& other); | 39 GestureEventDetails(EventType type, const GestureEventDetails& other); |
27 | 40 |
28 EventType type() const { return type_; } | 41 EventType type() const { return type_; } |
29 | 42 |
30 GestureDeviceType device_type() const { return device_type_; } | 43 GestureDeviceType device_type() const { return device_type_; } |
31 void set_device_type(GestureDeviceType device_type) { | 44 void set_device_type(GestureDeviceType device_type) { |
32 device_type_ = device_type; | 45 device_type_ = device_type; |
(...skipping 18 matching lines...) Expand all Loading... | |
51 float scroll_x_hint() const { | 64 float scroll_x_hint() const { |
52 DCHECK_EQ(ET_GESTURE_SCROLL_BEGIN, type_); | 65 DCHECK_EQ(ET_GESTURE_SCROLL_BEGIN, type_); |
53 return data_.scroll_begin.x_hint; | 66 return data_.scroll_begin.x_hint; |
54 } | 67 } |
55 | 68 |
56 float scroll_y_hint() const { | 69 float scroll_y_hint() const { |
57 DCHECK_EQ(ET_GESTURE_SCROLL_BEGIN, type_); | 70 DCHECK_EQ(ET_GESTURE_SCROLL_BEGIN, type_); |
58 return data_.scroll_begin.y_hint; | 71 return data_.scroll_begin.y_hint; |
59 } | 72 } |
60 | 73 |
74 ScrollUnits scroll_begin_units() const { | |
75 DCHECK_EQ(ET_GESTURE_SCROLL_BEGIN, type_); | |
76 return data_.scroll_begin.delta_hint_units; | |
77 } | |
78 | |
61 float scroll_x() const { | 79 float scroll_x() const { |
62 DCHECK_EQ(ET_GESTURE_SCROLL_UPDATE, type_); | 80 DCHECK_EQ(ET_GESTURE_SCROLL_UPDATE, type_); |
63 return data_.scroll_update.x; | 81 return data_.scroll_update.x; |
64 } | 82 } |
65 | 83 |
66 float scroll_y() const { | 84 float scroll_y() const { |
67 DCHECK_EQ(ET_GESTURE_SCROLL_UPDATE, type_); | 85 DCHECK_EQ(ET_GESTURE_SCROLL_UPDATE, type_); |
68 return data_.scroll_update.y; | 86 return data_.scroll_update.y; |
69 } | 87 } |
70 | 88 |
89 ScrollUnits scroll_update_units() const { | |
90 DCHECK_EQ(ET_GESTURE_SCROLL_UPDATE, type_); | |
91 return data_.scroll_update.delta_units; | |
92 } | |
93 | |
71 float velocity_x() const { | 94 float velocity_x() const { |
72 DCHECK_EQ(ET_SCROLL_FLING_START, type_); | 95 DCHECK_EQ(ET_SCROLL_FLING_START, type_); |
73 return data_.fling_velocity.x; | 96 return data_.fling_velocity.x; |
74 } | 97 } |
75 | 98 |
76 float velocity_y() const { | 99 float velocity_y() const { |
77 DCHECK_EQ(ET_SCROLL_FLING_START, type_); | 100 DCHECK_EQ(ET_SCROLL_FLING_START, type_); |
78 return data_.fling_velocity.y; | 101 return data_.fling_velocity.y; |
79 } | 102 } |
80 | 103 |
(...skipping 74 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
155 | 178 |
156 private: | 179 private: |
157 EventType type_; | 180 EventType type_; |
158 union Details { | 181 union Details { |
159 Details(); | 182 Details(); |
160 struct { // SCROLL start details. | 183 struct { // SCROLL start details. |
161 // Distance that caused the scroll to start. Generally redundant with | 184 // Distance that caused the scroll to start. Generally redundant with |
162 // the x/y values from the first scroll_update. | 185 // the x/y values from the first scroll_update. |
163 float x_hint; | 186 float x_hint; |
164 float y_hint; | 187 float y_hint; |
188 ScrollUnits delta_hint_units; | |
165 } scroll_begin; | 189 } scroll_begin; |
166 | 190 |
167 struct { // SCROLL delta. | 191 struct { // SCROLL delta. |
168 float x; | 192 float x; |
169 float y; | 193 float y; |
194 ScrollUnits delta_units; | |
170 // Whether any previous scroll update in the current scroll sequence was | 195 // Whether any previous scroll update in the current scroll sequence was |
171 // suppressed because the underlying touch was consumed. | 196 // suppressed because the underlying touch was consumed. |
172 bool previous_update_in_sequence_prevented; | 197 bool previous_update_in_sequence_prevented; |
173 } scroll_update; | 198 } scroll_update; |
174 | 199 |
175 float scale; // PINCH scale. | 200 float scale; // PINCH scale. |
176 | 201 |
177 struct { // FLING velocity. | 202 struct { // FLING velocity. |
178 float x; | 203 float x; |
179 float y; | 204 float y; |
(...skipping 23 matching lines...) Expand all Loading... | |
203 int touch_points_; // Number of active touch points in the gesture. | 228 int touch_points_; // Number of active touch points in the gesture. |
204 | 229 |
205 // Bounding box is an axis-aligned rectangle that contains all the | 230 // Bounding box is an axis-aligned rectangle that contains all the |
206 // enclosing rectangles of the touch-points in the gesture. | 231 // enclosing rectangles of the touch-points in the gesture. |
207 gfx::RectF bounding_box_; | 232 gfx::RectF bounding_box_; |
208 }; | 233 }; |
209 | 234 |
210 } // namespace ui | 235 } // namespace ui |
211 | 236 |
212 #endif // UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DETAILS_H_ | 237 #endif // UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DETAILS_H_ |
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