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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. |
| (...skipping 76 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
| 87 /** | 87 /** |
| 88 * @} | 88 * @} |
| 89 */ | 89 */ |
| 90 | 90 |
| 91 /** | 91 /** |
| 92 * @addtogroup Structs | 92 * @addtogroup Structs |
| 93 * @{ | 93 * @{ |
| 94 */ | 94 */ |
| 95 | 95 |
| 96 /** | 96 /** |
| 97 * The PP_InputEvent_Key struct represents a key up or key down event. | 97 * The <code>PP_InputEvent_Key</code> struct represents a key up or key down |
| 98 * event. | |
| 98 * | 99 * |
| 99 * Key up and key down events correspond to physical keys on the keyboard. The | 100 * Key up and key down events correspond to physical keys on the keyboard. The |
| 100 * actual character that the user typed (if any) will be delivered in a | 101 * actual character that the user typed (if any) will be delivered in a |
| 101 * "character" event. | 102 * "character" event. |
| 102 * | 103 * |
| 103 * If the user loses focus on the module while a key is down, a key up | 104 * If the user loses focus on the module while a key is down, a key up |
| 104 * event might not occur. For example, if the module has focus and the user | 105 * event might not occur. For example, if the module has focus and the user |
| 105 * presses and holds the shift key, the module will see a "shift down" message. | 106 * presses and holds the shift key, the module will see a "shift down" message. |
| 106 * Then if the user clicks elsewhere on the web page, the module's focus will | 107 * Then if the user clicks elsewhere on the web page, the module's focus will |
| 107 * be lost and no more input events will be delivered. | 108 * be lost and no more input events will be delivered. |
| 108 * | 109 * |
| 109 * If your module depends on receiving key up events, it should also handle | 110 * If your module depends on receiving key up events, it should also handle |
| 110 * "lost focus" as the equivalent of "all keys up." | 111 * "lost focus" as the equivalent of "all keys up." |
| 111 */ | 112 */ |
| 112 struct PP_InputEvent_Key { | 113 struct PP_InputEvent_Key { |
| 113 /** This value is a bit field combination of the EVENT_MODIFIER flags. */ | 114 /** This value is a bit field combination of the EVENT_MODIFIER flags. */ |
| 114 uint32_t modifier; | 115 uint32_t modifier; |
| 115 | 116 |
| 116 /** | 117 /** |
| 117 * |key_code| reflects the DOM KeyboardEvent |keyCode| field. | 118 * This value reflects the DOM KeyboardEvent <code>keyCode</code> field. |
| 118 * Chrome populates this with the Windows-style Virtual Key code of the key. | 119 * Chrome populates this with the Windows-style Virtual Key code of the key. |
| 119 */ | 120 */ |
| 120 | 121 |
| 121 uint32_t key_code; | 122 uint32_t key_code; |
| 122 }; | 123 }; |
| 123 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_InputEvent_Key, 8); | 124 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_InputEvent_Key, 8); |
| 124 /** | 125 /** |
| 125 * @} | 126 * @} |
| 126 */ | 127 */ |
| 127 | 128 |
| 128 /** | 129 /** |
| 129 * @addtogroup Structs | 130 * @addtogroup Structs |
| 130 * @{ | 131 * @{ |
| 131 */ | 132 */ |
| 132 | 133 |
| 133 /** | 134 /** |
| 134 * The PP_InputEvent_Character struct represents a typed character event. | 135 * The <code>PP_InputEvent_Character</code> struct represents a typed character |
| 136 * event. | |
| 135 * | 137 * |
| 136 * Normally, the program will receive a key down event, followed by a character | 138 * Normally, the program will receive a key down event, followed by a character |
| 137 * event, followed by a key up event. The character event will have any | 139 * event, followed by a key up event. The character event will have any |
| 138 * modifier keys applied. Obvious examples are symbols, where Shift-5 gives you | 140 * modifier keys applied. Obvious examples are symbols, where Shift-5 gives you |
| 139 * a '%'. The key down and up events will give you the scan code for the "5" | 141 * a '%'. The key down and up events will give you the scan code for the "5" |
| 140 * key, and the character event will give you the '%' character. | 142 * key, and the character event will give you the '%' character. |
| 141 * | 143 * |
| 142 * You may not get a character event for all key down events if the key doesn't | 144 * You may not get a character event for all key down events if the key doesn't |
| 143 * generate a character. Likewise, you may actually get multiple character | 145 * generate a character. Likewise, you may actually get multiple character |
| 144 * events in a row. For example, some locales have an accent key that modifies | 146 * events in a row. For example, some locales have an accent key that modifies |
| 145 * the next character typed. You might get this stream of events: accent down, | 147 * the next character typed. You might get this stream of events: accent down, |
| 146 * accent up (it didn't generate a character), letter key down, letter with | 148 * accent up (it didn't generate a character), letter key down, letter with |
| 147 * accent character event (it was modified by the previous accent key), letter | 149 * accent character event (it was modified by the previous accent key), letter |
| 148 * key up. If the letter can't be combined with the accent, like an umlaut and | 150 * key up. If the letter can't be combined with the accent, like an umlaut and |
| 149 * an 'R', the system might send unlaut down, umlaut up, 'R' key down, umlaut | 151 * an 'R', the system might send unlaut down, umlaut up, 'R' key down, umlaut |
| 150 * character (can't combine it with 'R', so just send the raw unlaut so it | 152 * character (can't combine it with 'R', so just send the raw unlaut so it |
| 151 * isn't lost"), 'R' character event, 'R' key up. | 153 * isn't lost"), 'R' character event, 'R' key up. |
| 152 */ | 154 */ |
| 153 struct PP_InputEvent_Character { | 155 struct PP_InputEvent_Character { |
| 154 /** A combination of the EVENT_MODIFIER flags. */ | 156 /** A combination of the <code>EVENT_MODIFIER</code> flags. */ |
|
dmichael (off chromium)
2011/06/27 15:45:41
EVENT_MODIFIER->PP_InputEvent_Modifier
jond
2011/06/29 21:14:38
Done.
jond
2011/06/29 21:14:38
Done.
| |
| 155 uint32_t modifier; | 157 uint32_t modifier; |
| 156 | 158 |
| 157 /** | 159 /** |
| 158 * This value represents the typed character as a single null-terminated UTF-8 | 160 * This value represents the typed character as a single null-terminated UTF-8 |
| 159 * character. Any unused bytes will be filled with null bytes. Since the | 161 * character. Any unused bytes will be filled with null bytes. Since the |
| 160 * maximum UTF-8 character is 4 bytes, there will always be at least one null | 162 * maximum UTF-8 character is 4 bytes, there will always be at least one null |
| 161 * at the end so you can treat this as a null-termianted UTF-8 string. | 163 * at the end so you can treat this as a null-termianted UTF-8 string. |
| 162 */ | 164 */ |
| 163 char text[5]; | 165 char text[5]; |
| 164 }; | 166 }; |
| 165 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_InputEvent_Character, 12); | 167 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_InputEvent_Character, 12); |
| 166 /** | 168 /** |
| 167 * @} | 169 * @} |
| 168 */ | 170 */ |
| 169 | 171 |
| 170 /** | 172 /** |
| 171 * @addtogroup Structs | 173 * @addtogroup Structs |
| 172 * @{ | 174 * @{ |
| 173 */ | 175 */ |
| 174 | 176 |
| 175 /** | 177 /** |
| 176 * The PP_InputEvent_Mouse struct represents all mouse events except | 178 * The <code>PP_InputEvent_Mouse</code> struct represents all mouse events |
| 177 * mouse wheel events. | 179 * except mouse wheel events. |
| 178 */ | 180 */ |
| 179 struct PP_InputEvent_Mouse { | 181 struct PP_InputEvent_Mouse { |
| 180 /** This value is a bit field combination of the EVENT_MODIFIER flags. */ | 182 /** |
| 183 * This value is a bit field combination of the <code>EVENT_MODIFIER</code> | |
|
dmichael (off chromium)
2011/06/27 15:45:41
EVENT_MODIFIER->PP_InputEvent_Modifier
jond
2011/06/29 21:14:38
Done.
| |
| 184 * flags. | |
| 185 */ | |
| 181 uint32_t modifier; | 186 uint32_t modifier; |
| 182 | 187 |
| 183 /** | 188 /** |
| 184 * This value represents the button that changed for mouse down or up events. | 189 * This value represents the button that changed for mouse down or up events. |
| 185 * This value will be PP_EVENT_MOUSEBUTTON_NONE for mouse move, enter, and | 190 * This value will be <code>PP_EVENT_MOUSEBUTTON_NONE</code> for mouse move, |
| 186 * leave events. | 191 * enter, and leave events. |
| 187 */ | 192 */ |
| 188 PP_InputEvent_MouseButton button; | 193 PP_InputEvent_MouseButton button; |
| 189 | 194 |
| 190 /** | 195 /** |
| 191 * This values represents the x coordinate of the mouse when the event | 196 * This values represents the x coordinate of the mouse when the event |
| 192 * occurred. | 197 * occurred. |
| 193 * | 198 * |
| 194 * In most, but not all, cases these coordinates will just be integers. | 199 * In most, but not all, cases these coordinates will just be integers. |
| 195 * For example, the plugin element might be arbitrarily scaled or transformed | 200 * For example, the plugin element might be arbitrarily scaled or transformed |
| 196 * in the DOM, and translating a mouse event into the coordinate space of the | 201 * in the DOM, and translating a mouse event into the coordinate space of the |
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| 215 /** | 220 /** |
| 216 * @} | 221 * @} |
| 217 */ | 222 */ |
| 218 | 223 |
| 219 /** | 224 /** |
| 220 * @addtogroup Structs | 225 * @addtogroup Structs |
| 221 * @{ | 226 * @{ |
| 222 */ | 227 */ |
| 223 | 228 |
| 224 /** | 229 /** |
| 225 * The PP_InputEvent_Wheel struct represents all mouse wheel events. | 230 * The <code>PP_InputEvent_Wheel</code> struct represents all mouse wheel |
| 231 * events. | |
| 226 */ | 232 */ |
| 227 struct PP_InputEvent_Wheel { | 233 struct PP_InputEvent_Wheel { |
| 228 /** This value represents a combination of the EVENT_MODIFIER flags. */ | 234 /** |
| 235 * This value represents a combination of the <code>EVENT_MODIFIER</code> | |
| 236 * flags. | |
| 237 */ | |
| 229 uint32_t modifier; | 238 uint32_t modifier; |
| 230 | 239 |
| 231 /** | 240 /** |
| 232 * Indicates the amount vertically and horizontally the user has requested | 241 * Indicates the amount vertically and horizontally the user has requested |
| 233 * to scroll by with their mouse wheel. A scroll down or to the right (where | 242 * to scroll by with their mouse wheel. A scroll down or to the right (where |
| 234 * the content moves up or left) is represented as positive values, and | 243 * the content moves up or left) is represented as positive values, and |
| 235 * a scroll up or to the left (where the content moves down or right) is | 244 * a scroll up or to the left (where the content moves down or right) is |
| 236 * represented as negative values. | 245 * represented as negative values. |
| 237 * | 246 * |
| 238 * 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 |
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| 251 */ | 260 */ |
| 252 float delta_x; | 261 float delta_x; |
| 253 | 262 |
| 254 /** This value represents */ | 263 /** This value represents */ |
| 255 float delta_y; | 264 float delta_y; |
| 256 | 265 |
| 257 /** | 266 /** |
| 258 * The number of "clicks" of the scroll wheel that have produced the | 267 * The number of "clicks" of the scroll wheel that have produced the |
| 259 * event. The value may have system-specific acceleration applied to it, | 268 * event. The value may have system-specific acceleration applied to it, |
| 260 * depending on the device. The positive and negative meanings are the same | 269 * depending on the device. The positive and negative meanings are the same |
| 261 * as for |delta|. | 270 * as for <code>delta_x</code> and <code>delta_y</code>. |
| 262 * | 271 * |
| 263 * If you are scrolling, you probably want to use the delta values above. | 272 * If you are scrolling, you probably want to use the delta values above. |
| 264 * These tick events can be useful if you aren't doing actual scrolling and | 273 * These tick events can be useful if you aren't doing actual scrolling and |
| 265 * don't want or pixel values. An example may be cycling between different | 274 * don't want or pixel values. An example may be cycling between different |
| 266 * items in a game. | 275 * items in a game. |
| 267 * | 276 * |
| 268 * You may receive fractional values for the wheel ticks if the mouse wheel | 277 * You may receive fractional values for the wheel ticks if the mouse wheel |
| 269 * is high resolution or doesn't have "clicks". If your program wants | 278 * is high resolution or doesn't have "clicks". If your program wants |
| 270 * discrete events (as in the "picking items" example) you should accumulate | 279 * discrete events (as in the "picking items" example) you should accumulate |
| 271 * fractional click values from multiple messages until the total value | 280 * fractional click values from multiple messages until the total value |
| 272 * reaches positive or negative one. This should represent a similar amount | 281 * reaches positive or negative one. This should represent a similar amount |
| 273 * of scrolling as for a mouse that has a discrete mouse wheel. | 282 * of scrolling as for a mouse that has a discrete mouse wheel. |
| 274 */ | 283 */ |
| 275 float wheel_ticks_x; | 284 float wheel_ticks_x; |
| 276 | 285 |
| 277 /** This value represents */ | 286 /** This value represents */ |
| 278 float wheel_ticks_y; | 287 float wheel_ticks_y; |
| 279 | 288 |
| 280 /** | 289 /** |
| 281 * Indicates if the scroll delta_x/delta_y indicates pages or lines to | 290 * Indicates if the scroll <code>delta_x</code>/<code>delta_y</code> |
| 282 * scroll by. When true, the user is requesting to scroll by pages. | 291 * indicates pages or lines to scroll by. When true, the user is requesting |
| 292 * to scroll by pages. | |
| 283 */ | 293 */ |
| 284 PP_Bool scroll_by_page; | 294 PP_Bool scroll_by_page; |
| 285 }; | 295 }; |
| 286 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_InputEvent_Wheel, 24); | 296 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_InputEvent_Wheel, 24); |
| 287 /** | 297 /** |
| 288 * @} | 298 * @} |
| 289 */ | 299 */ |
| 290 | 300 |
| 291 /** | 301 /** |
| 292 * | 302 * |
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| 327 */ | 337 */ |
| 328 char padding[64]; | 338 char padding[64]; |
| 329 } u; | 339 } u; |
| 330 }; | 340 }; |
| 331 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_InputEvent, 80); | 341 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_InputEvent, 80); |
| 332 /** | 342 /** |
| 333 * @} | 343 * @} |
| 334 */ | 344 */ |
| 335 | 345 |
| 336 #endif /* PPAPI_C_PP_INPUT_EVENT_H_ */ | 346 #endif /* PPAPI_C_PP_INPUT_EVENT_H_ */ |
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