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Side by Side Diff: ppapi/c/pp_input_event.h

Issue 7308010: Formatting changes (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 5 months ago
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1 /* Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 /* Copyright (c) 2011 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 PPAPI_C_PP_INPUT_EVENT_H_ 5 #ifndef PPAPI_C_PP_INPUT_EVENT_H_
6 #define PPAPI_C_PP_INPUT_EVENT_H_ 6 #define PPAPI_C_PP_INPUT_EVENT_H_
7 7
8 /** 8 /**
9 * @file 9 * @file
10 * This file defines the API used to handle mouse and keyboard input events. 10 * This file defines the API used to handle mouse and keyboard input events.
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231 * events. 231 * events.
232 */ 232 */
233 struct PP_InputEvent_Wheel { 233 struct PP_InputEvent_Wheel {
234 /** 234 /**
235 * This value represents a combination of the <code>EVENT_MODIFIER</code> 235 * This value represents a combination of the <code>EVENT_MODIFIER</code>
236 * flags. 236 * flags.
237 */ 237 */
238 uint32_t modifier; 238 uint32_t modifier;
239 239
240 /** 240 /**
241 * Indicates the amount vertically and horizontally the user has requested 241 * This value indicates the amount vertically and horizontally the user has
der Springer 2011/08/09 20:40:40 Horizontal only. And this sentence is pretty awkw
jond 2011/08/10 21:05:59 Done.
242 * to scroll by with their mouse wheel. A scroll down or to the right (where 242 * requested to scroll by with their mouse wheel. A scroll down or to the
243 * the content moves up or left) is represented as positive values, and 243 * right (where the content moves up or left) is represented as positive
244 * a scroll up or to the left (where the content moves down or right) is 244 * values, and a scroll up or to the left (where the content moves down or
der Springer 2011/08/09 20:40:40 Remove references to "up/down" in this section.
jond 2011/08/10 21:05:59 Done.
245 * represented as negative values. 245 * right) is represented as negative values.
246 * 246 *
247 * The units are either in pixels (when scroll_by_page is false) or pages 247 * The units are either in pixels (when scroll_by_page is false) or pages
248 * (when scroll_by_page is true). For example, delta_y = -3 means scroll up 3 248 * (when scroll_by_page is true). For example, delta_y = -3 means scroll up 3
249 * pixels when scroll_by_page is false, and scroll up 3 pages when 249 * pixels when scroll_by_page is false, and scroll up 3 pages when
250 * scroll_by_page is true. 250 * scroll_by_page is true.
251 * 251 *
252 * This amount is system dependent and will take into account the user's 252 * This amount is system dependent and will take into account the user's
253 * preferred scroll sensitivity and potentially also nonlinear acceleration 253 * preferred scroll sensitivity and potentially also nonlinear acceleration
254 * based on the speed of the scrolling. 254 * based on the speed of the scrolling.
255 * 255 *
256 * Devices will be of varying resolution. Some mice with large detents will 256 * Devices will be of varying resolution. Some mice with large detents will
257 * only generate integer scroll amounts. But fractional values are also 257 * only generate integer scroll amounts. But fractional values are also
258 * possible, for example, on some trackpads and newer mice that don't have 258 * possible, for example, on some trackpads and newer mice that don't have
259 * "clicks". 259 * "clicks".
260 */ 260 */
261 float delta_x; 261 float delta_x;
262 262
263 /** This value represents */ 263 /**
264 * This value indicates the amount vertically and horizontally the user has
der Springer 2011/08/09 20:40:40 Vertical only. Also, this sentence is awkward (se
jond 2011/08/10 21:05:59 Done.
265 * requested to scroll by with their mouse wheel. A scroll down or to the
266 * right (where the content moves up or left) is represented as positive
der Springer 2011/08/09 20:40:40 Remove references to "left/right" in this section.
jond 2011/08/10 21:05:59 Done.
267 * values, and a scroll up or to the left (where the content moves down or
268 * right) is represented as negative values.
269 *
270 * The units are either in pixels (when scroll_by_page is false) or pages
271 * (when scroll_by_page is true). For example, delta_y = -3 means scroll up 3
272 * pixels when scroll_by_page is false, and scroll up 3 pages when
273 * scroll_by_page is true.
274 *
275 * This amount is system dependent and will take into account the user's
276 * preferred scroll sensitivity and potentially also nonlinear acceleration
277 * based on the speed of the scrolling.
278 *
279 * Devices will be of varying resolution. Some mice with large detents will
280 * only generate integer scroll amounts. But fractional values are also
281 * possible, for example, on some trackpads and newer mice that don't have
282 * "clicks".
283 */
264 float delta_y; 284 float delta_y;
265 285
266 /** 286 /**
267 * The number of "clicks" of the scroll wheel that have produced the 287 * The number of "clicks" of the scroll wheel that have produced the
268 * event. The value may have system-specific acceleration applied to it, 288 * event. The value may have system-specific acceleration applied to it,
269 * depending on the device. The positive and negative meanings are the same 289 * depending on the device. The positive and negative meanings are the same
270 * as for <code>delta_x</code> and <code>delta_y</code>. 290 * as for <code>delta_x</code> and <code>delta_y</code>.
271 * 291 *
272 * If you are scrolling, you probably want to use the delta values above. 292 * If you are scrolling, you probably want to use the delta values above.
273 * These tick events can be useful if you aren't doing actual scrolling and 293 * These tick events can be useful if you aren't doing actual scrolling and
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337 */ 357 */
338 char padding[64]; 358 char padding[64];
339 } u; 359 } u;
340 }; 360 };
341 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_InputEvent, 80); 361 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_InputEvent, 80);
342 /** 362 /**
343 * @} 363 * @}
344 */ 364 */
345 365
346 #endif /* PPAPI_C_PP_INPUT_EVENT_H_ */ 366 #endif /* PPAPI_C_PP_INPUT_EVENT_H_ */
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