1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _ANDROID_INPUT_H 18 #define _ANDROID_INPUT_H 19 20 /****************************************************************** 21 * 22 * IMPORTANT NOTICE: 23 * 24 * This file is part of Android's set of stable system headers 25 * exposed by the Android NDK (Native Development Kit). 26 * 27 * Third-party source AND binary code relies on the definitions 28 * here to be FROZEN ON ALL UPCOMING PLATFORM RELEASES. 29 * 30 * - DO NOT MODIFY ENUMS (EXCEPT IF YOU ADD NEW 32-BIT VALUES) 31 * - DO NOT MODIFY CONSTANTS OR FUNCTIONAL MACROS 32 * - DO NOT CHANGE THE SIGNATURE OF FUNCTIONS IN ANY WAY 33 * - DO NOT CHANGE THE LAYOUT OR SIZE OF STRUCTURES 34 */ 35 36 /* 37 * Structures and functions to receive and process input events in 38 * native code. 39 * 40 * NOTE: These functions MUST be implemented by /system/lib/libui.so 41 */ 42 43 #include <stdint.h> 44 #include <sys/types.h> 45 #include <android/keycodes.h> 46 #include <android/looper.h> 47 48 #ifdef __cplusplus 49 extern "C" { 50 #endif 51 52 /* 53 * Key states (may be returned by queries about the current state of a 54 * particular key code, scan code or switch). 55 */ 56 enum { 57 /* The key state is unknown or the requested key itself is not supported. */ 58 AKEY_STATE_UNKNOWN = -1, 59 60 /* The key is up. */ 61 AKEY_STATE_UP = 0, 62 63 /* The key is down. */ 64 AKEY_STATE_DOWN = 1, 65 66 /* The key is down but is a virtual key press that is being emulated by the system. */ 67 AKEY_STATE_VIRTUAL = 2 68 }; 69 70 /* 71 * Meta key / modifer state. 72 */ 73 enum { 74 /* No meta keys are pressed. */ 75 AMETA_NONE = 0, 76 77 /* This mask is used to check whether one of the ALT meta keys is pressed. */ 78 AMETA_ALT_ON = 0x02, 79 80 /* This mask is used to check whether the left ALT meta key is pressed. */ 81 AMETA_ALT_LEFT_ON = 0x10, 82 83 /* This mask is used to check whether the right ALT meta key is pressed. */ 84 AMETA_ALT_RIGHT_ON = 0x20, 85 86 /* This mask is used to check whether one of the SHIFT meta keys is pressed. */ 87 AMETA_SHIFT_ON = 0x01, 88 89 /* This mask is used to check whether the left SHIFT meta key is pressed. */ 90 AMETA_SHIFT_LEFT_ON = 0x40, 91 92 /* This mask is used to check whether the right SHIFT meta key is pressed. */ 93 AMETA_SHIFT_RIGHT_ON = 0x80, 94 95 /* This mask is used to check whether the SYM meta key is pressed. */ 96 AMETA_SYM_ON = 0x04, 97 98 /* This mask is used to check whether the FUNCTION meta key is pressed. */ 99 AMETA_FUNCTION_ON = 0x08, 100 101 /* This mask is used to check whether one of the CTRL meta keys is pressed. */ 102 AMETA_CTRL_ON = 0x1000, 103 104 /* This mask is used to check whether the left CTRL meta key is pressed. */ 105 AMETA_CTRL_LEFT_ON = 0x2000, 106 107 /* This mask is used to check whether the right CTRL meta key is pressed. */ 108 AMETA_CTRL_RIGHT_ON = 0x4000, 109 110 /* This mask is used to check whether one of the META meta keys is pressed. */ 111 AMETA_META_ON = 0x10000, 112 113 /* This mask is used to check whether the left META meta key is pressed. */ 114 AMETA_META_LEFT_ON = 0x20000, 115 116 /* This mask is used to check whether the right META meta key is pressed. */ 117 AMETA_META_RIGHT_ON = 0x40000, 118 119 /* This mask is used to check whether the CAPS LOCK meta key is on. */ 120 AMETA_CAPS_LOCK_ON = 0x100000, 121 122 /* This mask is used to check whether the NUM LOCK meta key is on. */ 123 AMETA_NUM_LOCK_ON = 0x200000, 124 125 /* This mask is used to check whether the SCROLL LOCK meta key is on. */ 126 AMETA_SCROLL_LOCK_ON = 0x400000, 127 }; 128 129 /* 130 * Input events. 131 * 132 * Input events are opaque structures. Use the provided accessors functions to 133 * read their properties. 134 */ 135 struct AInputEvent; 136 typedef struct AInputEvent AInputEvent; 137 138 /* 139 * Input event types. 140 */ 141 enum { 142 /* Indicates that the input event is a key event. */ 143 AINPUT_EVENT_TYPE_KEY = 1, 144 145 /* Indicates that the input event is a motion event. */ 146 AINPUT_EVENT_TYPE_MOTION = 2 147 }; 148 149 /* 150 * Key event actions. 151 */ 152 enum { 153 /* The key has been pressed down. */ 154 AKEY_EVENT_ACTION_DOWN = 0, 155 156 /* The key has been released. */ 157 AKEY_EVENT_ACTION_UP = 1, 158 159 /* Multiple duplicate key events have occurred in a row, or a complex string is 160 * being delivered. The repeat_count property of the key event contains the number 161 * of times the given key code should be executed. 162 */ 163 AKEY_EVENT_ACTION_MULTIPLE = 2 164 }; 165 166 /* 167 * Key event flags. 168 */ 169 enum { 170 /* This mask is set if the device woke because of this key event. */ 171 AKEY_EVENT_FLAG_WOKE_HERE = 0x1, 172 173 /* This mask is set if the key event was generated by a software keyboard. */ 174 AKEY_EVENT_FLAG_SOFT_KEYBOARD = 0x2, 175 176 /* This mask is set if we don't want the key event to cause us to leave touch mode. */ 177 AKEY_EVENT_FLAG_KEEP_TOUCH_MODE = 0x4, 178 179 /* This mask is set if an event was known to come from a trusted part 180 * of the system. That is, the event is known to come from the user, 181 * and could not have been spoofed by a third party component. */ 182 AKEY_EVENT_FLAG_FROM_SYSTEM = 0x8, 183 184 /* This mask is used for compatibility, to identify enter keys that are 185 * coming from an IME whose enter key has been auto-labelled "next" or 186 * "done". This allows TextView to dispatch these as normal enter keys 187 * for old applications, but still do the appropriate action when 188 * receiving them. */ 189 AKEY_EVENT_FLAG_EDITOR_ACTION = 0x10, 190 191 /* When associated with up key events, this indicates that the key press 192 * has been canceled. Typically this is used with virtual touch screen 193 * keys, where the user can slide from the virtual key area on to the 194 * display: in that case, the application will receive a canceled up 195 * event and should not perform the action normally associated with the 196 * key. Note that for this to work, the application can not perform an 197 * action for a key until it receives an up or the long press timeout has 198 * expired. */ 199 AKEY_EVENT_FLAG_CANCELED = 0x20, 200 201 /* This key event was generated by a virtual (on-screen) hard key area. 202 * Typically this is an area of the touchscreen, outside of the regular 203 * display, dedicated to "hardware" buttons. */ 204 AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY = 0x40, 205 206 /* This flag is set for the first key repeat that occurs after the 207 * long press timeout. */ 208 AKEY_EVENT_FLAG_LONG_PRESS = 0x80, 209 210 /* Set when a key event has AKEY_EVENT_FLAG_CANCELED set because a long 211 * press action was executed while it was down. */ 212 AKEY_EVENT_FLAG_CANCELED_LONG_PRESS = 0x100, 213 214 /* Set for AKEY_EVENT_ACTION_UP when this event's key code is still being 215 * tracked from its initial down. That is, somebody requested that tracking 216 * started on the key down and a long press has not caused 217 * the tracking to be canceled. */ 218 AKEY_EVENT_FLAG_TRACKING = 0x200, 219 220 /* Set when a key event has been synthesized to implement default behavior 221 * for an event that the application did not handle. 222 * Fallback key events are generated by unhandled trackball motions 223 * (to emulate a directional keypad) and by certain unhandled key presses 224 * that are declared in the key map (such as special function numeric keypad 225 * keys when numlock is off). */ 226 AKEY_EVENT_FLAG_FALLBACK = 0x400, 227 }; 228 229 /* 230 * Motion event actions. 231 */ 232 233 /* Bit shift for the action bits holding the pointer index as 234 * defined by AMOTION_EVENT_ACTION_POINTER_INDEX_MASK. 235 */ 236 #define AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT 8 237 238 enum { 239 /* Bit mask of the parts of the action code that are the action itself. 240 */ 241 AMOTION_EVENT_ACTION_MASK = 0xff, 242 243 /* Bits in the action code that represent a pointer index, used with 244 * AMOTION_EVENT_ACTION_POINTER_DOWN and AMOTION_EVENT_ACTION_POINTER_UP. Shifting 245 * down by AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT provides the actual pointer 246 * index where the data for the pointer going up or down can be found. 247 */ 248 AMOTION_EVENT_ACTION_POINTER_INDEX_MASK = 0xff00, 249 250 /* A pressed gesture has started, the motion contains the initial starting location. 251 */ 252 AMOTION_EVENT_ACTION_DOWN = 0, 253 254 /* A pressed gesture has finished, the motion contains the final release location 255 * as well as any intermediate points since the last down or move event. 256 */ 257 AMOTION_EVENT_ACTION_UP = 1, 258 259 /* A change has happened during a press gesture (between AMOTION_EVENT_ACTION_DOWN and 260 * AMOTION_EVENT_ACTION_UP). The motion contains the most recent point, as well as 261 * any intermediate points since the last down or move event. 262 */ 263 AMOTION_EVENT_ACTION_MOVE = 2, 264 265 /* The current gesture has been aborted. 266 * You will not receive any more points in it. You should treat this as 267 * an up event, but not perform any action that you normally would. 268 */ 269 AMOTION_EVENT_ACTION_CANCEL = 3, 270 271 /* A movement has happened outside of the normal bounds of the UI element. 272 * This does not provide a full gesture, but only the initial location of the movement/touch. 273 */ 274 AMOTION_EVENT_ACTION_OUTSIDE = 4, 275 276 /* A non-primary pointer has gone down. 277 * The bits in AMOTION_EVENT_ACTION_POINTER_INDEX_MASK indicate which pointer changed. 278 */ 279 AMOTION_EVENT_ACTION_POINTER_DOWN = 5, 280 281 /* A non-primary pointer has gone up. 282 * The bits in AMOTION_EVENT_ACTION_POINTER_INDEX_MASK indicate which pointer changed. 283 */ 284 AMOTION_EVENT_ACTION_POINTER_UP = 6, 285 286 /* A change happened but the pointer is not down (unlike AMOTION_EVENT_ACTION_MOVE). 287 * The motion contains the most recent point, as well as any intermediate points since 288 * the last hover move event. 289 */ 290 AMOTION_EVENT_ACTION_HOVER_MOVE = 7, 291 292 /* The motion event contains relative vertical and/or horizontal scroll offsets. 293 * Use getAxisValue to retrieve the information from AMOTION_EVENT_AXIS_VSCROLL 294 * and AMOTION_EVENT_AXIS_HSCROLL. 295 * The pointer may or may not be down when this event is dispatched. 296 * This action is always delivered to the winder under the pointer, which 297 * may not be the window currently touched. 298 */ 299 AMOTION_EVENT_ACTION_SCROLL = 8, 300 301 /* The pointer is not down but has entered the boundaries of a window or view. 302 */ 303 AMOTION_EVENT_ACTION_HOVER_ENTER = 9, 304 305 /* The pointer is not down but has exited the boundaries of a window or view. 306 */ 307 AMOTION_EVENT_ACTION_HOVER_EXIT = 10, 308 }; 309 310 /* 311 * Motion event flags. 312 */ 313 enum { 314 /* This flag indicates that the window that received this motion event is partly 315 * or wholly obscured by another visible window above it. This flag is set to true 316 * even if the event did not directly pass through the obscured area. 317 * A security sensitive application can check this flag to identify situations in which 318 * a malicious application may have covered up part of its content for the purpose 319 * of misleading the user or hijacking touches. An appropriate response might be 320 * to drop the suspect touches or to take additional precautions to confirm the user's 321 * actual intent. 322 */ 323 AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED = 0x1, 324 }; 325 326 /* 327 * Motion event edge touch flags. 328 */ 329 enum { 330 /* No edges intersected */ 331 AMOTION_EVENT_EDGE_FLAG_NONE = 0, 332 333 /* Flag indicating the motion event intersected the top edge of the screen. */ 334 AMOTION_EVENT_EDGE_FLAG_TOP = 0x01, 335 336 /* Flag indicating the motion event intersected the bottom edge of the screen. */ 337 AMOTION_EVENT_EDGE_FLAG_BOTTOM = 0x02, 338 339 /* Flag indicating the motion event intersected the left edge of the screen. */ 340 AMOTION_EVENT_EDGE_FLAG_LEFT = 0x04, 341 342 /* Flag indicating the motion event intersected the right edge of the screen. */ 343 AMOTION_EVENT_EDGE_FLAG_RIGHT = 0x08 344 }; 345 346 /* 347 * Constants that identify each individual axis of a motion event. 348 * Refer to the documentation on the MotionEvent class for descriptions of each axis. 349 */ 350 enum { 351 AMOTION_EVENT_AXIS_X = 0, 352 AMOTION_EVENT_AXIS_Y = 1, 353 AMOTION_EVENT_AXIS_PRESSURE = 2, 354 AMOTION_EVENT_AXIS_SIZE = 3, 355 AMOTION_EVENT_AXIS_TOUCH_MAJOR = 4, 356 AMOTION_EVENT_AXIS_TOUCH_MINOR = 5, 357 AMOTION_EVENT_AXIS_TOOL_MAJOR = 6, 358 AMOTION_EVENT_AXIS_TOOL_MINOR = 7, 359 AMOTION_EVENT_AXIS_ORIENTATION = 8, 360 AMOTION_EVENT_AXIS_VSCROLL = 9, 361 AMOTION_EVENT_AXIS_HSCROLL = 10, 362 AMOTION_EVENT_AXIS_Z = 11, 363 AMOTION_EVENT_AXIS_RX = 12, 364 AMOTION_EVENT_AXIS_RY = 13, 365 AMOTION_EVENT_AXIS_RZ = 14, 366 AMOTION_EVENT_AXIS_HAT_X = 15, 367 AMOTION_EVENT_AXIS_HAT_Y = 16, 368 AMOTION_EVENT_AXIS_LTRIGGER = 17, 369 AMOTION_EVENT_AXIS_RTRIGGER = 18, 370 AMOTION_EVENT_AXIS_THROTTLE = 19, 371 AMOTION_EVENT_AXIS_RUDDER = 20, 372 AMOTION_EVENT_AXIS_WHEEL = 21, 373 AMOTION_EVENT_AXIS_GAS = 22, 374 AMOTION_EVENT_AXIS_BRAKE = 23, 375 AMOTION_EVENT_AXIS_DISTANCE = 24, 376 AMOTION_EVENT_AXIS_TILT = 25, 377 AMOTION_EVENT_AXIS_GENERIC_1 = 32, 378 AMOTION_EVENT_AXIS_GENERIC_2 = 33, 379 AMOTION_EVENT_AXIS_GENERIC_3 = 34, 380 AMOTION_EVENT_AXIS_GENERIC_4 = 35, 381 AMOTION_EVENT_AXIS_GENERIC_5 = 36, 382 AMOTION_EVENT_AXIS_GENERIC_6 = 37, 383 AMOTION_EVENT_AXIS_GENERIC_7 = 38, 384 AMOTION_EVENT_AXIS_GENERIC_8 = 39, 385 AMOTION_EVENT_AXIS_GENERIC_9 = 40, 386 AMOTION_EVENT_AXIS_GENERIC_10 = 41, 387 AMOTION_EVENT_AXIS_GENERIC_11 = 42, 388 AMOTION_EVENT_AXIS_GENERIC_12 = 43, 389 AMOTION_EVENT_AXIS_GENERIC_13 = 44, 390 AMOTION_EVENT_AXIS_GENERIC_14 = 45, 391 AMOTION_EVENT_AXIS_GENERIC_15 = 46, 392 AMOTION_EVENT_AXIS_GENERIC_16 = 47, 393 394 // NOTE: If you add a new axis here you must also add it to several other files. 395 // Refer to frameworks/base/core/java/android/view/MotionEvent.java for the full list. 396 }; 397 398 /* 399 * Constants that identify buttons that are associated with motion events. 400 * Refer to the documentation on the MotionEvent class for descriptions of each button. 401 */ 402 enum { 403 AMOTION_EVENT_BUTTON_PRIMARY = 1 << 0, 404 AMOTION_EVENT_BUTTON_SECONDARY = 1 << 1, 405 AMOTION_EVENT_BUTTON_TERTIARY = 1 << 2, 406 AMOTION_EVENT_BUTTON_BACK = 1 << 3, 407 AMOTION_EVENT_BUTTON_FORWARD = 1 << 4, 408 }; 409 410 /* 411 * Constants that identify tool types. 412 * Refer to the documentation on the MotionEvent class for descriptions of each tool type. 413 */ 414 enum { 415 AMOTION_EVENT_TOOL_TYPE_UNKNOWN = 0, 416 AMOTION_EVENT_TOOL_TYPE_FINGER = 1, 417 AMOTION_EVENT_TOOL_TYPE_STYLUS = 2, 418 AMOTION_EVENT_TOOL_TYPE_MOUSE = 3, 419 AMOTION_EVENT_TOOL_TYPE_ERASER = 4, 420 }; 421 422 /* 423 * Input sources. 424 * 425 * Refer to the documentation on android.view.InputDevice for more details about input sources 426 * and their correct interpretation. 427 */ 428 enum { 429 AINPUT_SOURCE_CLASS_MASK = 0x000000ff, 430 431 AINPUT_SOURCE_CLASS_NONE = 0x00000000, 432 AINPUT_SOURCE_CLASS_BUTTON = 0x00000001, 433 AINPUT_SOURCE_CLASS_POINTER = 0x00000002, 434 AINPUT_SOURCE_CLASS_NAVIGATION = 0x00000004, 435 AINPUT_SOURCE_CLASS_POSITION = 0x00000008, 436 AINPUT_SOURCE_CLASS_JOYSTICK = 0x00000010, 437 }; 438 439 enum { 440 AINPUT_SOURCE_UNKNOWN = 0x00000000, 441 442 AINPUT_SOURCE_KEYBOARD = 0x00000100 | AINPUT_SOURCE_CLASS_BUTTON, 443 AINPUT_SOURCE_DPAD = 0x00000200 | AINPUT_SOURCE_CLASS_BUTTON, 444 AINPUT_SOURCE_GAMEPAD = 0x00000400 | AINPUT_SOURCE_CLASS_BUTTON, 445 AINPUT_SOURCE_TOUCHSCREEN = 0x00001000 | AINPUT_SOURCE_CLASS_POINTER, 446 AINPUT_SOURCE_MOUSE = 0x00002000 | AINPUT_SOURCE_CLASS_POINTER, 447 AINPUT_SOURCE_STYLUS = 0x00004000 | AINPUT_SOURCE_CLASS_POINTER, 448 AINPUT_SOURCE_TRACKBALL = 0x00010000 | AINPUT_SOURCE_CLASS_NAVIGATION, 449 AINPUT_SOURCE_TOUCHPAD = 0x00100000 | AINPUT_SOURCE_CLASS_POSITION, 450 AINPUT_SOURCE_TOUCH_NAVIGATION = 0x00200000 | AINPUT_SOURCE_CLASS_NONE, 451 AINPUT_SOURCE_JOYSTICK = 0x01000000 | AINPUT_SOURCE_CLASS_JOYSTICK, 452 453 AINPUT_SOURCE_ANY = 0xffffff00, 454 }; 455 456 /* 457 * Keyboard types. 458 * 459 * Refer to the documentation on android.view.InputDevice for more details. 460 */ 461 enum { 462 AINPUT_KEYBOARD_TYPE_NONE = 0, 463 AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC = 1, 464 AINPUT_KEYBOARD_TYPE_ALPHABETIC = 2, 465 }; 466 467 /* 468 * Constants used to retrieve information about the range of motion for a particular 469 * coordinate of a motion event. 470 * 471 * Refer to the documentation on android.view.InputDevice for more details about input sources 472 * and their correct interpretation. 473 * 474 * DEPRECATION NOTICE: These constants are deprecated. Use AMOTION_EVENT_AXIS_* constants instead. 475 */ 476 enum { 477 AINPUT_MOTION_RANGE_X = AMOTION_EVENT_AXIS_X, 478 AINPUT_MOTION_RANGE_Y = AMOTION_EVENT_AXIS_Y, 479 AINPUT_MOTION_RANGE_PRESSURE = AMOTION_EVENT_AXIS_PRESSURE, 480 AINPUT_MOTION_RANGE_SIZE = AMOTION_EVENT_AXIS_SIZE, 481 AINPUT_MOTION_RANGE_TOUCH_MAJOR = AMOTION_EVENT_AXIS_TOUCH_MAJOR, 482 AINPUT_MOTION_RANGE_TOUCH_MINOR = AMOTION_EVENT_AXIS_TOUCH_MINOR, 483 AINPUT_MOTION_RANGE_TOOL_MAJOR = AMOTION_EVENT_AXIS_TOOL_MAJOR, 484 AINPUT_MOTION_RANGE_TOOL_MINOR = AMOTION_EVENT_AXIS_TOOL_MINOR, 485 AINPUT_MOTION_RANGE_ORIENTATION = AMOTION_EVENT_AXIS_ORIENTATION, 486 } __attribute__ ((deprecated)); 487 488 489 /* 490 * Input event accessors. 491 * 492 * Note that most functions can only be used on input events that are of a given type. 493 * Calling these functions on input events of other types will yield undefined behavior. 494 */ 495 496 /*** Accessors for all input events. ***/ 497 498 /* Get the input event type. */ 499 int32_t AInputEvent_getType(const AInputEvent* event); 500 501 /* Get the id for the device that an input event came from. 502 * 503 * Input events can be generated by multiple different input devices. 504 * Use the input device id to obtain information about the input 505 * device that was responsible for generating a particular event. 506 * 507 * An input device id of 0 indicates that the event didn't come from a physical device; 508 * other numbers are arbitrary and you shouldn't depend on the values. 509 * Use the provided input device query API to obtain information about input devices. 510 */ 511 int32_t AInputEvent_getDeviceId(const AInputEvent* event); 512 513 /* Get the input event source. */ 514 int32_t AInputEvent_getSource(const AInputEvent* event); 515 516 /*** Accessors for key events only. ***/ 517 518 /* Get the key event action. */ 519 int32_t AKeyEvent_getAction(const AInputEvent* key_event); 520 521 /* Get the key event flags. */ 522 int32_t AKeyEvent_getFlags(const AInputEvent* key_event); 523 524 /* Get the key code of the key event. 525 * This is the physical key that was pressed, not the Unicode character. */ 526 int32_t AKeyEvent_getKeyCode(const AInputEvent* key_event); 527 528 /* Get the hardware key id of this key event. 529 * These values are not reliable and vary from device to device. */ 530 int32_t AKeyEvent_getScanCode(const AInputEvent* key_event); 531 532 /* Get the meta key state. */ 533 int32_t AKeyEvent_getMetaState(const AInputEvent* key_event); 534 535 /* Get the repeat count of the event. 536 * For both key up an key down events, this is the number of times the key has 537 * repeated with the first down starting at 0 and counting up from there. For 538 * multiple key events, this is the number of down/up pairs that have occurred. */ 539 int32_t AKeyEvent_getRepeatCount(const AInputEvent* key_event); 540 541 /* Get the time of the most recent key down event, in the 542 * java.lang.System.nanoTime() time base. If this is a down event, 543 * this will be the same as eventTime. 544 * Note that when chording keys, this value is the down time of the most recently 545 * pressed key, which may not be the same physical key of this event. */ 546 int64_t AKeyEvent_getDownTime(const AInputEvent* key_event); 547 548 /* Get the time this event occurred, in the 549 * java.lang.System.nanoTime() time base. */ 550 int64_t AKeyEvent_getEventTime(const AInputEvent* key_event); 551 552 /*** Accessors for motion events only. ***/ 553 554 /* Get the combined motion event action code and pointer index. */ 555 int32_t AMotionEvent_getAction(const AInputEvent* motion_event); 556 557 /* Get the motion event flags. */ 558 int32_t AMotionEvent_getFlags(const AInputEvent* motion_event); 559 560 /* Get the state of any meta / modifier keys that were in effect when the 561 * event was generated. */ 562 int32_t AMotionEvent_getMetaState(const AInputEvent* motion_event); 563 564 /* Get the button state of all buttons that are pressed. */ 565 int32_t AMotionEvent_getButtonState(const AInputEvent* motion_event); 566 567 /* Get a bitfield indicating which edges, if any, were touched by this motion event. 568 * For touch events, clients can use this to determine if the user's finger was 569 * touching the edge of the display. */ 570 int32_t AMotionEvent_getEdgeFlags(const AInputEvent* motion_event); 571 572 /* Get the time when the user originally pressed down to start a stream of 573 * position events, in the java.lang.System.nanoTime() time base. */ 574 int64_t AMotionEvent_getDownTime(const AInputEvent* motion_event); 575 576 /* Get the time when this specific event was generated, 577 * in the java.lang.System.nanoTime() time base. */ 578 int64_t AMotionEvent_getEventTime(const AInputEvent* motion_event); 579 580 /* Get the X coordinate offset. 581 * For touch events on the screen, this is the delta that was added to the raw 582 * screen coordinates to adjust for the absolute position of the containing windows 583 * and views. */ 584 float AMotionEvent_getXOffset(const AInputEvent* motion_event); 585 586 /* Get the precision of the Y coordinates being reported. 587 * For touch events on the screen, this is the delta that was added to the raw 588 * screen coordinates to adjust for the absolute position of the containing windows 589 * and views. */ 590 float AMotionEvent_getYOffset(const AInputEvent* motion_event); 591 592 /* Get the precision of the X coordinates being reported. 593 * You can multiply this number with an X coordinate sample to find the 594 * actual hardware value of the X coordinate. */ 595 float AMotionEvent_getXPrecision(const AInputEvent* motion_event); 596 597 /* Get the precision of the Y coordinates being reported. 598 * You can multiply this number with a Y coordinate sample to find the 599 * actual hardware value of the Y coordinate. */ 600 float AMotionEvent_getYPrecision(const AInputEvent* motion_event); 601 602 /* Get the number of pointers of data contained in this event. 603 * Always >= 1. */ 604 size_t AMotionEvent_getPointerCount(const AInputEvent* motion_event); 605 606 /* Get the pointer identifier associated with a particular pointer 607 * data index in this event. The identifier tells you the actual pointer 608 * number associated with the data, accounting for individual pointers 609 * going up and down since the start of the current gesture. */ 610 int32_t AMotionEvent_getPointerId(const AInputEvent* motion_event, size_t pointer_index); 611 612 /* Get the tool type of a pointer for the given pointer index. 613 * The tool type indicates the type of tool used to make contact such as a 614 * finger or stylus, if known. */ 615 int32_t AMotionEvent_getToolType(const AInputEvent* motion_event, size_t pointer_index); 616 617 /* Get the original raw X coordinate of this event. 618 * For touch events on the screen, this is the original location of the event 619 * on the screen, before it had been adjusted for the containing window 620 * and views. */ 621 float AMotionEvent_getRawX(const AInputEvent* motion_event, size_t pointer_index); 622 623 /* Get the original raw X coordinate of this event. 624 * For touch events on the screen, this is the original location of the event 625 * on the screen, before it had been adjusted for the containing window 626 * and views. */ 627 float AMotionEvent_getRawY(const AInputEvent* motion_event, size_t pointer_index); 628 629 /* Get the current X coordinate of this event for the given pointer index. 630 * Whole numbers are pixels; the value may have a fraction for input devices 631 * that are sub-pixel precise. */ 632 float AMotionEvent_getX(const AInputEvent* motion_event, size_t pointer_index); 633 634 /* Get the current Y coordinate of this event for the given pointer index. 635 * Whole numbers are pixels; the value may have a fraction for input devices 636 * that are sub-pixel precise. */ 637 float AMotionEvent_getY(const AInputEvent* motion_event, size_t pointer_index); 638 639 /* Get the current pressure of this event for the given pointer index. 640 * The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure), 641 * although values higher than 1 may be generated depending on the calibration of 642 * the input device. */ 643 float AMotionEvent_getPressure(const AInputEvent* motion_event, size_t pointer_index); 644 645 /* Get the current scaled value of the approximate size for the given pointer index. 646 * This represents some approximation of the area of the screen being 647 * pressed; the actual value in pixels corresponding to the 648 * touch is normalized with the device specific range of values 649 * and scaled to a value between 0 and 1. The value of size can be used to 650 * determine fat touch events. */ 651 float AMotionEvent_getSize(const AInputEvent* motion_event, size_t pointer_index); 652 653 /* Get the current length of the major axis of an ellipse that describes the touch area 654 * at the point of contact for the given pointer index. */ 655 float AMotionEvent_getTouchMajor(const AInputEvent* motion_event, size_t pointer_index); 656 657 /* Get the current length of the minor axis of an ellipse that describes the touch area 658 * at the point of contact for the given pointer index. */ 659 float AMotionEvent_getTouchMinor(const AInputEvent* motion_event, size_t pointer_index); 660 661 /* Get the current length of the major axis of an ellipse that describes the size 662 * of the approaching tool for the given pointer index. 663 * The tool area represents the estimated size of the finger or pen that is 664 * touching the device independent of its actual touch area at the point of contact. */ 665 float AMotionEvent_getToolMajor(const AInputEvent* motion_event, size_t pointer_index); 666 667 /* Get the current length of the minor axis of an ellipse that describes the size 668 * of the approaching tool for the given pointer index. 669 * The tool area represents the estimated size of the finger or pen that is 670 * touching the device independent of its actual touch area at the point of contact. */ 671 float AMotionEvent_getToolMinor(const AInputEvent* motion_event, size_t pointer_index); 672 673 /* Get the current orientation of the touch area and tool area in radians clockwise from 674 * vertical for the given pointer index. 675 * An angle of 0 degrees indicates that the major axis of contact is oriented 676 * upwards, is perfectly circular or is of unknown orientation. A positive angle 677 * indicates that the major axis of contact is oriented to the right. A negative angle 678 * indicates that the major axis of contact is oriented to the left. 679 * The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians 680 * (finger pointing fully right). */ 681 float AMotionEvent_getOrientation(const AInputEvent* motion_event, size_t pointer_index); 682 683 /* Get the value of the request axis for the given pointer index. */ 684 float AMotionEvent_getAxisValue(const AInputEvent* motion_event, 685 int32_t axis, size_t pointer_index); 686 687 /* Get the number of historical points in this event. These are movements that 688 * have occurred between this event and the previous event. This only applies 689 * to AMOTION_EVENT_ACTION_MOVE events -- all other actions will have a size of 0. 690 * Historical samples are indexed from oldest to newest. */ 691 size_t AMotionEvent_getHistorySize(const AInputEvent* motion_event); 692 693 /* Get the time that a historical movement occurred between this event and 694 * the previous event, in the java.lang.System.nanoTime() time base. */ 695 int64_t AMotionEvent_getHistoricalEventTime(AInputEvent* motion_event, 696 size_t history_index); 697 698 /* Get the historical raw X coordinate of this event for the given pointer index that 699 * occurred between this event and the previous motion event. 700 * For touch events on the screen, this is the original location of the event 701 * on the screen, before it had been adjusted for the containing window 702 * and views. 703 * Whole numbers are pixels; the value may have a fraction for input devices 704 * that are sub-pixel precise. */ 705 float AMotionEvent_getHistoricalRawX(const AInputEvent* motion_event, size_t pointer_index, 706 size_t history_index); 707 708 /* Get the historical raw Y coordinate of this event for the given pointer index that 709 * occurred between this event and the previous motion event. 710 * For touch events on the screen, this is the original location of the event 711 * on the screen, before it had been adjusted for the containing window 712 * and views. 713 * Whole numbers are pixels; the value may have a fraction for input devices 714 * that are sub-pixel precise. */ 715 float AMotionEvent_getHistoricalRawY(const AInputEvent* motion_event, size_t pointer_index, 716 size_t history_index); 717 718 /* Get the historical X coordinate of this event for the given pointer index that 719 * occurred between this event and the previous motion event. 720 * Whole numbers are pixels; the value may have a fraction for input devices 721 * that are sub-pixel precise. */ 722 float AMotionEvent_getHistoricalX(AInputEvent* motion_event, size_t pointer_index, 723 size_t history_index); 724 725 /* Get the historical Y coordinate of this event for the given pointer index that 726 * occurred between this event and the previous motion event. 727 * Whole numbers are pixels; the value may have a fraction for input devices 728 * that are sub-pixel precise. */ 729 float AMotionEvent_getHistoricalY(AInputEvent* motion_event, size_t pointer_index, 730 size_t history_index); 731 732 /* Get the historical pressure of this event for the given pointer index that 733 * occurred between this event and the previous motion event. 734 * The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure), 735 * although values higher than 1 may be generated depending on the calibration of 736 * the input device. */ 737 float AMotionEvent_getHistoricalPressure(AInputEvent* motion_event, size_t pointer_index, 738 size_t history_index); 739 740 /* Get the current scaled value of the approximate size for the given pointer index that 741 * occurred between this event and the previous motion event. 742 * This represents some approximation of the area of the screen being 743 * pressed; the actual value in pixels corresponding to the 744 * touch is normalized with the device specific range of values 745 * and scaled to a value between 0 and 1. The value of size can be used to 746 * determine fat touch events. */ 747 float AMotionEvent_getHistoricalSize(AInputEvent* motion_event, size_t pointer_index, 748 size_t history_index); 749 750 /* Get the historical length of the major axis of an ellipse that describes the touch area 751 * at the point of contact for the given pointer index that 752 * occurred between this event and the previous motion event. */ 753 float AMotionEvent_getHistoricalTouchMajor(const AInputEvent* motion_event, size_t pointer_index, 754 size_t history_index); 755 756 /* Get the historical length of the minor axis of an ellipse that describes the touch area 757 * at the point of contact for the given pointer index that 758 * occurred between this event and the previous motion event. */ 759 float AMotionEvent_getHistoricalTouchMinor(const AInputEvent* motion_event, size_t pointer_index, 760 size_t history_index); 761 762 /* Get the historical length of the major axis of an ellipse that describes the size 763 * of the approaching tool for the given pointer index that 764 * occurred between this event and the previous motion event. 765 * The tool area represents the estimated size of the finger or pen that is 766 * touching the device independent of its actual touch area at the point of contact. */ 767 float AMotionEvent_getHistoricalToolMajor(const AInputEvent* motion_event, size_t pointer_index, 768 size_t history_index); 769 770 /* Get the historical length of the minor axis of an ellipse that describes the size 771 * of the approaching tool for the given pointer index that 772 * occurred between this event and the previous motion event. 773 * The tool area represents the estimated size of the finger or pen that is 774 * touching the device independent of its actual touch area at the point of contact. */ 775 float AMotionEvent_getHistoricalToolMinor(const AInputEvent* motion_event, size_t pointer_index, 776 size_t history_index); 777 778 /* Get the historical orientation of the touch area and tool area in radians clockwise from 779 * vertical for the given pointer index that 780 * occurred between this event and the previous motion event. 781 * An angle of 0 degrees indicates that the major axis of contact is oriented 782 * upwards, is perfectly circular or is of unknown orientation. A positive angle 783 * indicates that the major axis of contact is oriented to the right. A negative angle 784 * indicates that the major axis of contact is oriented to the left. 785 * The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians 786 * (finger pointing fully right). */ 787 float AMotionEvent_getHistoricalOrientation(const AInputEvent* motion_event, size_t pointer_index, 788 size_t history_index); 789 790 /* Get the historical value of the request axis for the given pointer index 791 * that occurred between this event and the previous motion event. */ 792 float AMotionEvent_getHistoricalAxisValue(const AInputEvent* motion_event, 793 int32_t axis, size_t pointer_index, size_t history_index); 794 795 796 /* 797 * Input queue 798 * 799 * An input queue is the facility through which you retrieve input 800 * events. 801 */ 802 struct AInputQueue; 803 typedef struct AInputQueue AInputQueue; 804 805 /* 806 * Add this input queue to a looper for processing. See 807 * ALooper_addFd() for information on the ident, callback, and data params. 808 */ 809 void AInputQueue_attachLooper(AInputQueue* queue, ALooper* looper, 810 int ident, ALooper_callbackFunc callback, void* data); 811 812 /* 813 * Remove the input queue from the looper it is currently attached to. 814 */ 815 void AInputQueue_detachLooper(AInputQueue* queue); 816 817 /* 818 * Returns true if there are one or more events available in the 819 * input queue. Returns 1 if the queue has events; 0 if 820 * it does not have events; and a negative value if there is an error. 821 */ 822 int32_t AInputQueue_hasEvents(AInputQueue* queue); 823 824 /* 825 * Returns the next available event from the queue. Returns a negative 826 * value if no events are available or an error has occurred. 827 */ 828 int32_t AInputQueue_getEvent(AInputQueue* queue, AInputEvent** outEvent); 829 830 /* 831 * Sends the key for standard pre-dispatching -- that is, possibly deliver 832 * it to the current IME to be consumed before the app. Returns 0 if it 833 * was not pre-dispatched, meaning you can process it right now. If non-zero 834 * is returned, you must abandon the current event processing and allow the 835 * event to appear again in the event queue (if it does not get consumed during 836 * pre-dispatching). 837 */ 838 int32_t AInputQueue_preDispatchEvent(AInputQueue* queue, AInputEvent* event); 839 840 /* 841 * Report that dispatching has finished with the given event. 842 * This must be called after receiving an event with AInputQueue_get_event(). 843 */ 844 void AInputQueue_finishEvent(AInputQueue* queue, AInputEvent* event, int handled); 845 846 #ifdef __cplusplus 847 } 848 #endif 849 850 #endif // _ANDROID_INPUT_H 851
