2 * Copyright (C) 2010 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
26 #ifndef _ANDROID_INPUT_H
27 #define _ANDROID_INPUT_H
29 #include <sys/cdefs.h>
31 /******************************************************************
35 * This file is part of Android's set of stable system headers
36 * exposed by the Android NDK (Native Development Kit).
38 * Third-party source AND binary code relies on the definitions
39 * here to be FROZEN ON ALL UPCOMING PLATFORM RELEASES.
41 * - DO NOT MODIFY ENUMS (EXCEPT IF YOU ADD NEW 32-BIT VALUES)
42 * - DO NOT MODIFY CONSTANTS OR FUNCTIONAL MACROS
43 * - DO NOT CHANGE THE SIGNATURE OF FUNCTIONS IN ANY WAY
44 * - DO NOT CHANGE THE LAYOUT OR SIZE OF STRUCTURES
48 * Structures and functions to receive and process input events in
51 * NOTE: These functions MUST be implemented by /system/lib/libui.so
55 #include <sys/types.h>
56 #include <android/keycodes.h>
57 #include <android/looper.h>
64 * Key states (may be returned by queries about the current state of a
65 * particular key code, scan code or switch).
68 /** The key state is unknown or the requested key itself is not supported. */
69 AKEY_STATE_UNKNOWN = -1,
74 /** The key is down. */
77 /** The key is down but is a virtual key press that is being emulated by the system. */
78 AKEY_STATE_VIRTUAL = 2
82 * Meta key / modifer state.
85 /** No meta keys are pressed. */
88 /** This mask is used to check whether one of the ALT meta keys is pressed. */
91 /** This mask is used to check whether the left ALT meta key is pressed. */
92 AMETA_ALT_LEFT_ON = 0x10,
94 /** This mask is used to check whether the right ALT meta key is pressed. */
95 AMETA_ALT_RIGHT_ON = 0x20,
97 /** This mask is used to check whether one of the SHIFT meta keys is pressed. */
98 AMETA_SHIFT_ON = 0x01,
100 /** This mask is used to check whether the left SHIFT meta key is pressed. */
101 AMETA_SHIFT_LEFT_ON = 0x40,
103 /** This mask is used to check whether the right SHIFT meta key is pressed. */
104 AMETA_SHIFT_RIGHT_ON = 0x80,
106 /** This mask is used to check whether the SYM meta key is pressed. */
109 /** This mask is used to check whether the FUNCTION meta key is pressed. */
110 AMETA_FUNCTION_ON = 0x08,
112 /** This mask is used to check whether one of the CTRL meta keys is pressed. */
113 AMETA_CTRL_ON = 0x1000,
115 /** This mask is used to check whether the left CTRL meta key is pressed. */
116 AMETA_CTRL_LEFT_ON = 0x2000,
118 /** This mask is used to check whether the right CTRL meta key is pressed. */
119 AMETA_CTRL_RIGHT_ON = 0x4000,
121 /** This mask is used to check whether one of the META meta keys is pressed. */
122 AMETA_META_ON = 0x10000,
124 /** This mask is used to check whether the left META meta key is pressed. */
125 AMETA_META_LEFT_ON = 0x20000,
127 /** This mask is used to check whether the right META meta key is pressed. */
128 AMETA_META_RIGHT_ON = 0x40000,
130 /** This mask is used to check whether the CAPS LOCK meta key is on. */
131 AMETA_CAPS_LOCK_ON = 0x100000,
133 /** This mask is used to check whether the NUM LOCK meta key is on. */
134 AMETA_NUM_LOCK_ON = 0x200000,
136 /** This mask is used to check whether the SCROLL LOCK meta key is on. */
137 AMETA_SCROLL_LOCK_ON = 0x400000,
144 * Input events are opaque structures. Use the provided accessors functions to
145 * read their properties.
147 typedef struct AInputEvent AInputEvent;
153 /** Indicates that the input event is a key event. */
154 AINPUT_EVENT_TYPE_KEY = 1,
156 /** Indicates that the input event is a motion event. */
157 AINPUT_EVENT_TYPE_MOTION = 2
164 /** The key has been pressed down. */
165 AKEY_EVENT_ACTION_DOWN = 0,
167 /** The key has been released. */
168 AKEY_EVENT_ACTION_UP = 1,
171 * Multiple duplicate key events have occurred in a row, or a
172 * complex string is being delivered. The repeat_count property
173 * of the key event contains the number of times the given key
174 * code should be executed.
176 AKEY_EVENT_ACTION_MULTIPLE = 2
183 /** This mask is set if the device woke because of this key event. */
184 AKEY_EVENT_FLAG_WOKE_HERE = 0x1,
186 /** This mask is set if the key event was generated by a software keyboard. */
187 AKEY_EVENT_FLAG_SOFT_KEYBOARD = 0x2,
189 /** This mask is set if we don't want the key event to cause us to leave touch mode. */
190 AKEY_EVENT_FLAG_KEEP_TOUCH_MODE = 0x4,
193 * This mask is set if an event was known to come from a trusted
194 * part of the system. That is, the event is known to come from
195 * the user, and could not have been spoofed by a third party
198 AKEY_EVENT_FLAG_FROM_SYSTEM = 0x8,
201 * This mask is used for compatibility, to identify enter keys that are
202 * coming from an IME whose enter key has been auto-labelled "next" or
203 * "done". This allows TextView to dispatch these as normal enter keys
204 * for old applications, but still do the appropriate action when
207 AKEY_EVENT_FLAG_EDITOR_ACTION = 0x10,
210 * When associated with up key events, this indicates that the key press
211 * has been canceled. Typically this is used with virtual touch screen
212 * keys, where the user can slide from the virtual key area on to the
213 * display: in that case, the application will receive a canceled up
214 * event and should not perform the action normally associated with the
215 * key. Note that for this to work, the application can not perform an
216 * action for a key until it receives an up or the long press timeout has
219 AKEY_EVENT_FLAG_CANCELED = 0x20,
222 * This key event was generated by a virtual (on-screen) hard key area.
223 * Typically this is an area of the touchscreen, outside of the regular
224 * display, dedicated to "hardware" buttons.
226 AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY = 0x40,
229 * This flag is set for the first key repeat that occurs after the
230 * long press timeout.
232 AKEY_EVENT_FLAG_LONG_PRESS = 0x80,
235 * Set when a key event has AKEY_EVENT_FLAG_CANCELED set because a long
236 * press action was executed while it was down.
238 AKEY_EVENT_FLAG_CANCELED_LONG_PRESS = 0x100,
241 * Set for AKEY_EVENT_ACTION_UP when this event's key code is still being
242 * tracked from its initial down. That is, somebody requested that tracking
243 * started on the key down and a long press has not caused
244 * the tracking to be canceled.
246 AKEY_EVENT_FLAG_TRACKING = 0x200,
249 * Set when a key event has been synthesized to implement default behavior
250 * for an event that the application did not handle.
251 * Fallback key events are generated by unhandled trackball motions
252 * (to emulate a directional keypad) and by certain unhandled key presses
253 * that are declared in the key map (such as special function numeric keypad
254 * keys when numlock is off).
256 AKEY_EVENT_FLAG_FALLBACK = 0x400,
260 * Bit shift for the action bits holding the pointer index as
261 * defined by AMOTION_EVENT_ACTION_POINTER_INDEX_MASK.
263 #define AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT 8
265 /** Motion event actions */
267 /** Bit mask of the parts of the action code that are the action itself. */
268 AMOTION_EVENT_ACTION_MASK = 0xff,
271 * Bits in the action code that represent a pointer index, used with
272 * AMOTION_EVENT_ACTION_POINTER_DOWN and AMOTION_EVENT_ACTION_POINTER_UP. Shifting
273 * down by AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT provides the actual pointer
274 * index where the data for the pointer going up or down can be found.
276 AMOTION_EVENT_ACTION_POINTER_INDEX_MASK = 0xff00,
278 /** A pressed gesture has started, the motion contains the initial starting location. */
279 AMOTION_EVENT_ACTION_DOWN = 0,
282 * A pressed gesture has finished, the motion contains the final release location
283 * as well as any intermediate points since the last down or move event.
285 AMOTION_EVENT_ACTION_UP = 1,
288 * A change has happened during a press gesture (between AMOTION_EVENT_ACTION_DOWN and
289 * AMOTION_EVENT_ACTION_UP). The motion contains the most recent point, as well as
290 * any intermediate points since the last down or move event.
292 AMOTION_EVENT_ACTION_MOVE = 2,
295 * The current gesture has been aborted.
296 * You will not receive any more points in it. You should treat this as
297 * an up event, but not perform any action that you normally would.
299 AMOTION_EVENT_ACTION_CANCEL = 3,
302 * A movement has happened outside of the normal bounds of the UI element.
303 * This does not provide a full gesture, but only the initial location of the movement/touch.
305 AMOTION_EVENT_ACTION_OUTSIDE = 4,
308 * A non-primary pointer has gone down.
309 * The bits in AMOTION_EVENT_ACTION_POINTER_INDEX_MASK indicate which pointer changed.
311 AMOTION_EVENT_ACTION_POINTER_DOWN = 5,
314 * A non-primary pointer has gone up.
315 * The bits in AMOTION_EVENT_ACTION_POINTER_INDEX_MASK indicate which pointer changed.
317 AMOTION_EVENT_ACTION_POINTER_UP = 6,
320 * A change happened but the pointer is not down (unlike AMOTION_EVENT_ACTION_MOVE).
321 * The motion contains the most recent point, as well as any intermediate points since
322 * the last hover move event.
324 AMOTION_EVENT_ACTION_HOVER_MOVE = 7,
327 * The motion event contains relative vertical and/or horizontal scroll offsets.
328 * Use getAxisValue to retrieve the information from AMOTION_EVENT_AXIS_VSCROLL
329 * and AMOTION_EVENT_AXIS_HSCROLL.
330 * The pointer may or may not be down when this event is dispatched.
331 * This action is always delivered to the winder under the pointer, which
332 * may not be the window currently touched.
334 AMOTION_EVENT_ACTION_SCROLL = 8,
336 /** The pointer is not down but has entered the boundaries of a window or view. */
337 AMOTION_EVENT_ACTION_HOVER_ENTER = 9,
339 /** The pointer is not down but has exited the boundaries of a window or view. */
340 AMOTION_EVENT_ACTION_HOVER_EXIT = 10,
342 /* One or more buttons have been pressed. */
343 AMOTION_EVENT_ACTION_BUTTON_PRESS = 11,
345 /* One or more buttons have been released. */
346 AMOTION_EVENT_ACTION_BUTTON_RELEASE = 12,
350 * Motion event flags.
354 * This flag indicates that the window that received this motion event is partly
355 * or wholly obscured by another visible window above it. This flag is set to true
356 * even if the event did not directly pass through the obscured area.
357 * A security sensitive application can check this flag to identify situations in which
358 * a malicious application may have covered up part of its content for the purpose
359 * of misleading the user or hijacking touches. An appropriate response might be
360 * to drop the suspect touches or to take additional precautions to confirm the user's
363 AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED = 0x1,
367 * Motion event edge touch flags.
370 /** No edges intersected. */
371 AMOTION_EVENT_EDGE_FLAG_NONE = 0,
373 /** Flag indicating the motion event intersected the top edge of the screen. */
374 AMOTION_EVENT_EDGE_FLAG_TOP = 0x01,
376 /** Flag indicating the motion event intersected the bottom edge of the screen. */
377 AMOTION_EVENT_EDGE_FLAG_BOTTOM = 0x02,
379 /** Flag indicating the motion event intersected the left edge of the screen. */
380 AMOTION_EVENT_EDGE_FLAG_LEFT = 0x04,
382 /** Flag indicating the motion event intersected the right edge of the screen. */
383 AMOTION_EVENT_EDGE_FLAG_RIGHT = 0x08
387 * Constants that identify each individual axis of a motion event.
388 * @anchor AMOTION_EVENT_AXIS
392 * Axis constant: X axis of a motion event.
394 * - For a touch screen, reports the absolute X screen position of the center of
395 * the touch contact area. The units are display pixels.
396 * - For a touch pad, reports the absolute X surface position of the center of the touch
397 * contact area. The units are device-dependent.
398 * - For a mouse, reports the absolute X screen position of the mouse pointer.
399 * The units are display pixels.
400 * - For a trackball, reports the relative horizontal displacement of the trackball.
401 * The value is normalized to a range from -1.0 (left) to 1.0 (right).
402 * - For a joystick, reports the absolute X position of the joystick.
403 * The value is normalized to a range from -1.0 (left) to 1.0 (right).
405 AMOTION_EVENT_AXIS_X = 0,
407 * Axis constant: Y axis of a motion event.
409 * - For a touch screen, reports the absolute Y screen position of the center of
410 * the touch contact area. The units are display pixels.
411 * - For a touch pad, reports the absolute Y surface position of the center of the touch
412 * contact area. The units are device-dependent.
413 * - For a mouse, reports the absolute Y screen position of the mouse pointer.
414 * The units are display pixels.
415 * - For a trackball, reports the relative vertical displacement of the trackball.
416 * The value is normalized to a range from -1.0 (up) to 1.0 (down).
417 * - For a joystick, reports the absolute Y position of the joystick.
418 * The value is normalized to a range from -1.0 (up or far) to 1.0 (down or near).
420 AMOTION_EVENT_AXIS_Y = 1,
422 * Axis constant: Pressure axis of a motion event.
424 * - For a touch screen or touch pad, reports the approximate pressure applied to the surface
425 * by a finger or other tool. The value is normalized to a range from
426 * 0 (no pressure at all) to 1 (normal pressure), although values higher than 1
427 * may be generated depending on the calibration of the input device.
428 * - For a trackball, the value is set to 1 if the trackball button is pressed
430 * - For a mouse, the value is set to 1 if the primary mouse button is pressed
433 AMOTION_EVENT_AXIS_PRESSURE = 2,
435 * Axis constant: Size axis of a motion event.
437 * - For a touch screen or touch pad, reports the approximate size of the contact area in
438 * relation to the maximum detectable size for the device. The value is normalized
439 * to a range from 0 (smallest detectable size) to 1 (largest detectable size),
440 * although it is not a linear scale. This value is of limited use.
441 * To obtain calibrated size information, see
442 * {@link AMOTION_EVENT_AXIS_TOUCH_MAJOR} or {@link AMOTION_EVENT_AXIS_TOOL_MAJOR}.
444 AMOTION_EVENT_AXIS_SIZE = 3,
446 * Axis constant: TouchMajor axis of a motion event.
448 * - For a touch screen, reports the length of the major axis of an ellipse that
449 * represents the touch area at the point of contact.
450 * The units are display pixels.
451 * - For a touch pad, reports the length of the major axis of an ellipse that
452 * represents the touch area at the point of contact.
453 * The units are device-dependent.
455 AMOTION_EVENT_AXIS_TOUCH_MAJOR = 4,
457 * Axis constant: TouchMinor axis of a motion event.
459 * - For a touch screen, reports the length of the minor axis of an ellipse that
460 * represents the touch area at the point of contact.
461 * The units are display pixels.
462 * - For a touch pad, reports the length of the minor axis of an ellipse that
463 * represents the touch area at the point of contact.
464 * The units are device-dependent.
466 * When the touch is circular, the major and minor axis lengths will be equal to one another.
468 AMOTION_EVENT_AXIS_TOUCH_MINOR = 5,
470 * Axis constant: ToolMajor axis of a motion event.
472 * - For a touch screen, reports the length of the major axis of an ellipse that
473 * represents the size of the approaching finger or tool used to make contact.
474 * - For a touch pad, reports the length of the major axis of an ellipse that
475 * represents the size of the approaching finger or tool used to make contact.
476 * The units are device-dependent.
478 * When the touch is circular, the major and minor axis lengths will be equal to one another.
480 * The tool size may be larger than the touch size since the tool may not be fully
481 * in contact with the touch sensor.
483 AMOTION_EVENT_AXIS_TOOL_MAJOR = 6,
485 * Axis constant: ToolMinor axis of a motion event.
487 * - For a touch screen, reports the length of the minor axis of an ellipse that
488 * represents the size of the approaching finger or tool used to make contact.
489 * - For a touch pad, reports the length of the minor axis of an ellipse that
490 * represents the size of the approaching finger or tool used to make contact.
491 * The units are device-dependent.
493 * When the touch is circular, the major and minor axis lengths will be equal to one another.
495 * The tool size may be larger than the touch size since the tool may not be fully
496 * in contact with the touch sensor.
498 AMOTION_EVENT_AXIS_TOOL_MINOR = 7,
500 * Axis constant: Orientation axis of a motion event.
502 * - For a touch screen or touch pad, reports the orientation of the finger
503 * or tool in radians relative to the vertical plane of the device.
504 * An angle of 0 radians indicates that the major axis of contact is oriented
505 * upwards, is perfectly circular or is of unknown orientation. A positive angle
506 * indicates that the major axis of contact is oriented to the right. A negative angle
507 * indicates that the major axis of contact is oriented to the left.
508 * The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
509 * (finger pointing fully right).
510 * - For a stylus, the orientation indicates the direction in which the stylus
511 * is pointing in relation to the vertical axis of the current orientation of the screen.
512 * The range is from -PI radians to PI radians, where 0 is pointing up,
513 * -PI/2 radians is pointing left, -PI or PI radians is pointing down, and PI/2 radians
514 * is pointing right. See also {@link AMOTION_EVENT_AXIS_TILT}.
516 AMOTION_EVENT_AXIS_ORIENTATION = 8,
518 * Axis constant: Vertical Scroll axis of a motion event.
520 * - For a mouse, reports the relative movement of the vertical scroll wheel.
521 * The value is normalized to a range from -1.0 (down) to 1.0 (up).
523 * This axis should be used to scroll views vertically.
525 AMOTION_EVENT_AXIS_VSCROLL = 9,
527 * Axis constant: Horizontal Scroll axis of a motion event.
529 * - For a mouse, reports the relative movement of the horizontal scroll wheel.
530 * The value is normalized to a range from -1.0 (left) to 1.0 (right).
532 * This axis should be used to scroll views horizontally.
534 AMOTION_EVENT_AXIS_HSCROLL = 10,
536 * Axis constant: Z axis of a motion event.
538 * - For a joystick, reports the absolute Z position of the joystick.
539 * The value is normalized to a range from -1.0 (high) to 1.0 (low).
540 * <em>On game pads with two analog joysticks, this axis is often reinterpreted
541 * to report the absolute X position of the second joystick instead.</em>
543 AMOTION_EVENT_AXIS_Z = 11,
545 * Axis constant: X Rotation axis of a motion event.
547 * - For a joystick, reports the absolute rotation angle about the X axis.
548 * The value is normalized to a range from -1.0 (counter-clockwise) to 1.0 (clockwise).
550 AMOTION_EVENT_AXIS_RX = 12,
552 * Axis constant: Y Rotation axis of a motion event.
554 * - For a joystick, reports the absolute rotation angle about the Y axis.
555 * The value is normalized to a range from -1.0 (counter-clockwise) to 1.0 (clockwise).
557 AMOTION_EVENT_AXIS_RY = 13,
559 * Axis constant: Z Rotation axis of a motion event.
561 * - For a joystick, reports the absolute rotation angle about the Z axis.
562 * The value is normalized to a range from -1.0 (counter-clockwise) to 1.0 (clockwise).
563 * On game pads with two analog joysticks, this axis is often reinterpreted
564 * to report the absolute Y position of the second joystick instead.
566 AMOTION_EVENT_AXIS_RZ = 14,
568 * Axis constant: Hat X axis of a motion event.
570 * - For a joystick, reports the absolute X position of the directional hat control.
571 * The value is normalized to a range from -1.0 (left) to 1.0 (right).
573 AMOTION_EVENT_AXIS_HAT_X = 15,
575 * Axis constant: Hat Y axis of a motion event.
577 * - For a joystick, reports the absolute Y position of the directional hat control.
578 * The value is normalized to a range from -1.0 (up) to 1.0 (down).
580 AMOTION_EVENT_AXIS_HAT_Y = 16,
582 * Axis constant: Left Trigger axis of a motion event.
584 * - For a joystick, reports the absolute position of the left trigger control.
585 * The value is normalized to a range from 0.0 (released) to 1.0 (fully pressed).
587 AMOTION_EVENT_AXIS_LTRIGGER = 17,
589 * Axis constant: Right Trigger axis of a motion event.
591 * - For a joystick, reports the absolute position of the right trigger control.
592 * The value is normalized to a range from 0.0 (released) to 1.0 (fully pressed).
594 AMOTION_EVENT_AXIS_RTRIGGER = 18,
596 * Axis constant: Throttle axis of a motion event.
598 * - For a joystick, reports the absolute position of the throttle control.
599 * The value is normalized to a range from 0.0 (fully open) to 1.0 (fully closed).
601 AMOTION_EVENT_AXIS_THROTTLE = 19,
603 * Axis constant: Rudder axis of a motion event.
605 * - For a joystick, reports the absolute position of the rudder control.
606 * The value is normalized to a range from -1.0 (turn left) to 1.0 (turn right).
608 AMOTION_EVENT_AXIS_RUDDER = 20,
610 * Axis constant: Wheel axis of a motion event.
612 * - For a joystick, reports the absolute position of the steering wheel control.
613 * The value is normalized to a range from -1.0 (turn left) to 1.0 (turn right).
615 AMOTION_EVENT_AXIS_WHEEL = 21,
617 * Axis constant: Gas axis of a motion event.
619 * - For a joystick, reports the absolute position of the gas (accelerator) control.
620 * The value is normalized to a range from 0.0 (no acceleration)
621 * to 1.0 (maximum acceleration).
623 AMOTION_EVENT_AXIS_GAS = 22,
625 * Axis constant: Brake axis of a motion event.
627 * - For a joystick, reports the absolute position of the brake control.
628 * The value is normalized to a range from 0.0 (no braking) to 1.0 (maximum braking).
630 AMOTION_EVENT_AXIS_BRAKE = 23,
632 * Axis constant: Distance axis of a motion event.
634 * - For a stylus, reports the distance of the stylus from the screen.
635 * A value of 0.0 indicates direct contact and larger values indicate increasing
636 * distance from the surface.
638 AMOTION_EVENT_AXIS_DISTANCE = 24,
640 * Axis constant: Tilt axis of a motion event.
642 * - For a stylus, reports the tilt angle of the stylus in radians where
643 * 0 radians indicates that the stylus is being held perpendicular to the
644 * surface, and PI/2 radians indicates that the stylus is being held flat
645 * against the surface.
647 AMOTION_EVENT_AXIS_TILT = 25,
649 * Axis constant: Generic scroll axis of a motion event.
651 * - This is used for scroll axis motion events that can't be classified as strictly
652 * vertical or horizontal. The movement of a rotating scroller is an example of this.
654 AMOTION_EVENT_AXIS_SCROLL = 26,
656 * Axis constant: The movement of x position of a motion event.
658 * - For a mouse, reports a difference of x position between the previous position.
659 * This is useful when pointer is captured, in that case the mouse pointer doesn't
660 * change the location but this axis reports the difference which allows the app
661 * to see how the mouse is moved.
663 AMOTION_EVENT_AXIS_RELATIVE_X = 27,
665 * Axis constant: The movement of y position of a motion event.
667 * Same as {@link RELATIVE_X}, but for y position.
669 AMOTION_EVENT_AXIS_RELATIVE_Y = 28,
671 * Axis constant: Generic 1 axis of a motion event.
672 * The interpretation of a generic axis is device-specific.
674 AMOTION_EVENT_AXIS_GENERIC_1 = 32,
676 * Axis constant: Generic 2 axis of a motion event.
677 * The interpretation of a generic axis is device-specific.
679 AMOTION_EVENT_AXIS_GENERIC_2 = 33,
681 * Axis constant: Generic 3 axis of a motion event.
682 * The interpretation of a generic axis is device-specific.
684 AMOTION_EVENT_AXIS_GENERIC_3 = 34,
686 * Axis constant: Generic 4 axis of a motion event.
687 * The interpretation of a generic axis is device-specific.
689 AMOTION_EVENT_AXIS_GENERIC_4 = 35,
691 * Axis constant: Generic 5 axis of a motion event.
692 * The interpretation of a generic axis is device-specific.
694 AMOTION_EVENT_AXIS_GENERIC_5 = 36,
696 * Axis constant: Generic 6 axis of a motion event.
697 * The interpretation of a generic axis is device-specific.
699 AMOTION_EVENT_AXIS_GENERIC_6 = 37,
701 * Axis constant: Generic 7 axis of a motion event.
702 * The interpretation of a generic axis is device-specific.
704 AMOTION_EVENT_AXIS_GENERIC_7 = 38,
706 * Axis constant: Generic 8 axis of a motion event.
707 * The interpretation of a generic axis is device-specific.
709 AMOTION_EVENT_AXIS_GENERIC_8 = 39,
711 * Axis constant: Generic 9 axis of a motion event.
712 * The interpretation of a generic axis is device-specific.
714 AMOTION_EVENT_AXIS_GENERIC_9 = 40,
716 * Axis constant: Generic 10 axis of a motion event.
717 * The interpretation of a generic axis is device-specific.
719 AMOTION_EVENT_AXIS_GENERIC_10 = 41,
721 * Axis constant: Generic 11 axis of a motion event.
722 * The interpretation of a generic axis is device-specific.
724 AMOTION_EVENT_AXIS_GENERIC_11 = 42,
726 * Axis constant: Generic 12 axis of a motion event.
727 * The interpretation of a generic axis is device-specific.
729 AMOTION_EVENT_AXIS_GENERIC_12 = 43,
731 * Axis constant: Generic 13 axis of a motion event.
732 * The interpretation of a generic axis is device-specific.
734 AMOTION_EVENT_AXIS_GENERIC_13 = 44,
736 * Axis constant: Generic 14 axis of a motion event.
737 * The interpretation of a generic axis is device-specific.
739 AMOTION_EVENT_AXIS_GENERIC_14 = 45,
741 * Axis constant: Generic 15 axis of a motion event.
742 * The interpretation of a generic axis is device-specific.
744 AMOTION_EVENT_AXIS_GENERIC_15 = 46,
746 * Axis constant: Generic 16 axis of a motion event.
747 * The interpretation of a generic axis is device-specific.
749 AMOTION_EVENT_AXIS_GENERIC_16 = 47,
751 // NOTE: If you add a new axis here you must also add it to several other files.
752 // Refer to frameworks/base/core/java/android/view/MotionEvent.java for the full list.
756 * Constants that identify buttons that are associated with motion events.
757 * Refer to the documentation on the MotionEvent class for descriptions of each button.
761 AMOTION_EVENT_BUTTON_PRIMARY = 1 << 0,
763 AMOTION_EVENT_BUTTON_SECONDARY = 1 << 1,
765 AMOTION_EVENT_BUTTON_TERTIARY = 1 << 2,
767 AMOTION_EVENT_BUTTON_BACK = 1 << 3,
769 AMOTION_EVENT_BUTTON_FORWARD = 1 << 4,
770 AMOTION_EVENT_BUTTON_STYLUS_PRIMARY = 1 << 5,
771 AMOTION_EVENT_BUTTON_STYLUS_SECONDARY = 1 << 6,
775 * Constants that identify tool types.
776 * Refer to the documentation on the MotionEvent class for descriptions of each tool type.
780 AMOTION_EVENT_TOOL_TYPE_UNKNOWN = 0,
782 AMOTION_EVENT_TOOL_TYPE_FINGER = 1,
784 AMOTION_EVENT_TOOL_TYPE_STYLUS = 2,
786 AMOTION_EVENT_TOOL_TYPE_MOUSE = 3,
788 AMOTION_EVENT_TOOL_TYPE_ERASER = 4,
792 * Input source masks.
794 * Refer to the documentation on android.view.InputDevice for more details about input sources
795 * and their correct interpretation.
799 AINPUT_SOURCE_CLASS_MASK = 0x000000ff,
802 AINPUT_SOURCE_CLASS_NONE = 0x00000000,
804 AINPUT_SOURCE_CLASS_BUTTON = 0x00000001,
806 AINPUT_SOURCE_CLASS_POINTER = 0x00000002,
808 AINPUT_SOURCE_CLASS_NAVIGATION = 0x00000004,
810 AINPUT_SOURCE_CLASS_POSITION = 0x00000008,
812 AINPUT_SOURCE_CLASS_JOYSTICK = 0x00000010,
820 AINPUT_SOURCE_UNKNOWN = 0x00000000,
823 AINPUT_SOURCE_KEYBOARD = 0x00000100 | AINPUT_SOURCE_CLASS_BUTTON,
825 AINPUT_SOURCE_DPAD = 0x00000200 | AINPUT_SOURCE_CLASS_BUTTON,
827 AINPUT_SOURCE_GAMEPAD = 0x00000400 | AINPUT_SOURCE_CLASS_BUTTON,
829 AINPUT_SOURCE_TOUCHSCREEN = 0x00001000 | AINPUT_SOURCE_CLASS_POINTER,
831 AINPUT_SOURCE_MOUSE = 0x00002000 | AINPUT_SOURCE_CLASS_POINTER,
833 AINPUT_SOURCE_STYLUS = 0x00004000 | AINPUT_SOURCE_CLASS_POINTER,
834 /** bluetooth stylus */
835 AINPUT_SOURCE_BLUETOOTH_STYLUS = 0x00008000 | AINPUT_SOURCE_STYLUS,
837 AINPUT_SOURCE_TRACKBALL = 0x00010000 | AINPUT_SOURCE_CLASS_NAVIGATION,
838 /** mouse relative */
839 AINPUT_SOURCE_MOUSE_RELATIVE = 0x00020000 | AINPUT_SOURCE_CLASS_NAVIGATION,
841 AINPUT_SOURCE_TOUCHPAD = 0x00100000 | AINPUT_SOURCE_CLASS_POSITION,
843 AINPUT_SOURCE_TOUCH_NAVIGATION = 0x00200000 | AINPUT_SOURCE_CLASS_NONE,
845 AINPUT_SOURCE_JOYSTICK = 0x01000000 | AINPUT_SOURCE_CLASS_JOYSTICK,
846 /** rotary encoder */
847 AINPUT_SOURCE_ROTARY_ENCODER = 0x00400000 | AINPUT_SOURCE_CLASS_NONE,
850 AINPUT_SOURCE_ANY = 0xffffff00,
856 * Refer to the documentation on android.view.InputDevice for more details.
860 AINPUT_KEYBOARD_TYPE_NONE = 0,
861 /** non alphabetic */
862 AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC = 1,
864 AINPUT_KEYBOARD_TYPE_ALPHABETIC = 2,
868 * Constants used to retrieve information about the range of motion for a particular
869 * coordinate of a motion event.
871 * Refer to the documentation on android.view.InputDevice for more details about input sources
872 * and their correct interpretation.
874 * @deprecated These constants are deprecated. Use {@link AMOTION_EVENT_AXIS AMOTION_EVENT_AXIS_*} constants instead.
878 AINPUT_MOTION_RANGE_X = AMOTION_EVENT_AXIS_X,
880 AINPUT_MOTION_RANGE_Y = AMOTION_EVENT_AXIS_Y,
882 AINPUT_MOTION_RANGE_PRESSURE = AMOTION_EVENT_AXIS_PRESSURE,
884 AINPUT_MOTION_RANGE_SIZE = AMOTION_EVENT_AXIS_SIZE,
886 AINPUT_MOTION_RANGE_TOUCH_MAJOR = AMOTION_EVENT_AXIS_TOUCH_MAJOR,
888 AINPUT_MOTION_RANGE_TOUCH_MINOR = AMOTION_EVENT_AXIS_TOUCH_MINOR,
890 AINPUT_MOTION_RANGE_TOOL_MAJOR = AMOTION_EVENT_AXIS_TOOL_MAJOR,
892 AINPUT_MOTION_RANGE_TOOL_MINOR = AMOTION_EVENT_AXIS_TOOL_MINOR,
894 AINPUT_MOTION_RANGE_ORIENTATION = AMOTION_EVENT_AXIS_ORIENTATION,
899 * Input event accessors.
901 * Note that most functions can only be used on input events that are of a given type.
902 * Calling these functions on input events of other types will yield undefined behavior.
905 /*** Accessors for all input events. ***/
907 /** Get the input event type. */
908 int32_t AInputEvent_getType(const AInputEvent* event);
910 /** Get the id for the device that an input event came from.
912 * Input events can be generated by multiple different input devices.
913 * Use the input device id to obtain information about the input
914 * device that was responsible for generating a particular event.
916 * An input device id of 0 indicates that the event didn't come from a physical device;
917 * other numbers are arbitrary and you shouldn't depend on the values.
918 * Use the provided input device query API to obtain information about input devices.
920 int32_t AInputEvent_getDeviceId(const AInputEvent* event);
922 /** Get the input event source. */
923 int32_t AInputEvent_getSource(const AInputEvent* event);
925 /*** Accessors for key events only. ***/
927 /** Get the key event action. */
928 int32_t AKeyEvent_getAction(const AInputEvent* key_event);
930 /** Get the key event flags. */
931 int32_t AKeyEvent_getFlags(const AInputEvent* key_event);
934 * Get the key code of the key event.
935 * This is the physical key that was pressed, not the Unicode character.
937 int32_t AKeyEvent_getKeyCode(const AInputEvent* key_event);
940 * Get the hardware key id of this key event.
941 * These values are not reliable and vary from device to device.
943 int32_t AKeyEvent_getScanCode(const AInputEvent* key_event);
945 /** Get the meta key state. */
946 int32_t AKeyEvent_getMetaState(const AInputEvent* key_event);
949 * Get the repeat count of the event.
950 * For both key up an key down events, this is the number of times the key has
951 * repeated with the first down starting at 0 and counting up from there. For
952 * multiple key events, this is the number of down/up pairs that have occurred.
954 int32_t AKeyEvent_getRepeatCount(const AInputEvent* key_event);
957 * Get the time of the most recent key down event, in the
958 * java.lang.System.nanoTime() time base. If this is a down event,
959 * this will be the same as eventTime.
960 * Note that when chording keys, this value is the down time of the most recently
961 * pressed key, which may not be the same physical key of this event.
963 int64_t AKeyEvent_getDownTime(const AInputEvent* key_event);
966 * Get the time this event occurred, in the
967 * java.lang.System.nanoTime() time base.
969 int64_t AKeyEvent_getEventTime(const AInputEvent* key_event);
971 /*** Accessors for motion events only. ***/
973 /** Get the combined motion event action code and pointer index. */
974 int32_t AMotionEvent_getAction(const AInputEvent* motion_event);
976 /** Get the motion event flags. */
977 int32_t AMotionEvent_getFlags(const AInputEvent* motion_event);
980 * Get the state of any meta / modifier keys that were in effect when the
981 * event was generated.
983 int32_t AMotionEvent_getMetaState(const AInputEvent* motion_event);
985 #if __ANDROID_API__ >= 14
986 /** Get the button state of all buttons that are pressed. */
987 int32_t AMotionEvent_getButtonState(const AInputEvent* motion_event);
991 * Get a bitfield indicating which edges, if any, were touched by this motion event.
992 * For touch events, clients can use this to determine if the user's finger was
993 * touching the edge of the display.
995 int32_t AMotionEvent_getEdgeFlags(const AInputEvent* motion_event);
998 * Get the time when the user originally pressed down to start a stream of
999 * position events, in the java.lang.System.nanoTime() time base.
1001 int64_t AMotionEvent_getDownTime(const AInputEvent* motion_event);
1004 * Get the time when this specific event was generated,
1005 * in the java.lang.System.nanoTime() time base.
1007 int64_t AMotionEvent_getEventTime(const AInputEvent* motion_event);
1010 * Get the X coordinate offset.
1011 * For touch events on the screen, this is the delta that was added to the raw
1012 * screen coordinates to adjust for the absolute position of the containing windows
1015 float AMotionEvent_getXOffset(const AInputEvent* motion_event);
1018 * Get the Y coordinate offset.
1019 * For touch events on the screen, this is the delta that was added to the raw
1020 * screen coordinates to adjust for the absolute position of the containing windows
1023 float AMotionEvent_getYOffset(const AInputEvent* motion_event);
1026 * Get the precision of the X coordinates being reported.
1027 * You can multiply this number with an X coordinate sample to find the
1028 * actual hardware value of the X coordinate.
1030 float AMotionEvent_getXPrecision(const AInputEvent* motion_event);
1033 * Get the precision of the Y coordinates being reported.
1034 * You can multiply this number with a Y coordinate sample to find the
1035 * actual hardware value of the Y coordinate.
1037 float AMotionEvent_getYPrecision(const AInputEvent* motion_event);
1040 * Get the number of pointers of data contained in this event.
1043 size_t AMotionEvent_getPointerCount(const AInputEvent* motion_event);
1046 * Get the pointer identifier associated with a particular pointer
1047 * data index in this event. The identifier tells you the actual pointer
1048 * number associated with the data, accounting for individual pointers
1049 * going up and down since the start of the current gesture.
1051 int32_t AMotionEvent_getPointerId(const AInputEvent* motion_event, size_t pointer_index);
1053 #if __ANDROID_API__ >= 14
1055 * Get the tool type of a pointer for the given pointer index.
1056 * The tool type indicates the type of tool used to make contact such as a
1057 * finger or stylus, if known.
1059 int32_t AMotionEvent_getToolType(const AInputEvent* motion_event, size_t pointer_index);
1063 * Get the original raw X coordinate of this event.
1064 * For touch events on the screen, this is the original location of the event
1065 * on the screen, before it had been adjusted for the containing window
1068 float AMotionEvent_getRawX(const AInputEvent* motion_event, size_t pointer_index);
1071 * Get the original raw X coordinate of this event.
1072 * For touch events on the screen, this is the original location of the event
1073 * on the screen, before it had been adjusted for the containing window
1076 float AMotionEvent_getRawY(const AInputEvent* motion_event, size_t pointer_index);
1079 * Get the current X coordinate of this event for the given pointer index.
1080 * Whole numbers are pixels; the value may have a fraction for input devices
1081 * that are sub-pixel precise.
1083 float AMotionEvent_getX(const AInputEvent* motion_event, size_t pointer_index);
1086 * Get the current Y coordinate of this event for the given pointer index.
1087 * Whole numbers are pixels; the value may have a fraction for input devices
1088 * that are sub-pixel precise.
1090 float AMotionEvent_getY(const AInputEvent* motion_event, size_t pointer_index);
1093 * Get the current pressure of this event for the given pointer index.
1094 * The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure),
1095 * although values higher than 1 may be generated depending on the calibration of
1098 float AMotionEvent_getPressure(const AInputEvent* motion_event, size_t pointer_index);
1101 * Get the current scaled value of the approximate size for the given pointer index.
1102 * This represents some approximation of the area of the screen being
1103 * pressed; the actual value in pixels corresponding to the
1104 * touch is normalized with the device specific range of values
1105 * and scaled to a value between 0 and 1. The value of size can be used to
1106 * determine fat touch events.
1108 float AMotionEvent_getSize(const AInputEvent* motion_event, size_t pointer_index);
1111 * Get the current length of the major axis of an ellipse that describes the touch area
1112 * at the point of contact for the given pointer index.
1114 float AMotionEvent_getTouchMajor(const AInputEvent* motion_event, size_t pointer_index);
1117 * Get the current length of the minor axis of an ellipse that describes the touch area
1118 * at the point of contact for the given pointer index.
1120 float AMotionEvent_getTouchMinor(const AInputEvent* motion_event, size_t pointer_index);
1123 * Get the current length of the major axis of an ellipse that describes the size
1124 * of the approaching tool for the given pointer index.
1125 * The tool area represents the estimated size of the finger or pen that is
1126 * touching the device independent of its actual touch area at the point of contact.
1128 float AMotionEvent_getToolMajor(const AInputEvent* motion_event, size_t pointer_index);
1131 * Get the current length of the minor axis of an ellipse that describes the size
1132 * of the approaching tool for the given pointer index.
1133 * The tool area represents the estimated size of the finger or pen that is
1134 * touching the device independent of its actual touch area at the point of contact.
1136 float AMotionEvent_getToolMinor(const AInputEvent* motion_event, size_t pointer_index);
1139 * Get the current orientation of the touch area and tool area in radians clockwise from
1140 * vertical for the given pointer index.
1141 * An angle of 0 degrees indicates that the major axis of contact is oriented
1142 * upwards, is perfectly circular or is of unknown orientation. A positive angle
1143 * indicates that the major axis of contact is oriented to the right. A negative angle
1144 * indicates that the major axis of contact is oriented to the left.
1145 * The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
1146 * (finger pointing fully right).
1148 float AMotionEvent_getOrientation(const AInputEvent* motion_event, size_t pointer_index);
1150 #if __ANDROID_API__ >= 13
1151 /** Get the value of the request axis for the given pointer index. */
1152 float AMotionEvent_getAxisValue(const AInputEvent* motion_event,
1153 int32_t axis, size_t pointer_index);
1157 * Get the number of historical points in this event. These are movements that
1158 * have occurred between this event and the previous event. This only applies
1159 * to AMOTION_EVENT_ACTION_MOVE events -- all other actions will have a size of 0.
1160 * Historical samples are indexed from oldest to newest.
1162 size_t AMotionEvent_getHistorySize(const AInputEvent* motion_event);
1165 * Get the time that a historical movement occurred between this event and
1166 * the previous event, in the java.lang.System.nanoTime() time base.
1168 int64_t AMotionEvent_getHistoricalEventTime(const AInputEvent* motion_event,
1169 size_t history_index);
1172 * Get the historical raw X coordinate of this event for the given pointer index that
1173 * occurred between this event and the previous motion event.
1174 * For touch events on the screen, this is the original location of the event
1175 * on the screen, before it had been adjusted for the containing window
1177 * Whole numbers are pixels; the value may have a fraction for input devices
1178 * that are sub-pixel precise.
1180 float AMotionEvent_getHistoricalRawX(const AInputEvent* motion_event, size_t pointer_index,
1181 size_t history_index);
1184 * Get the historical raw Y coordinate of this event for the given pointer index that
1185 * occurred between this event and the previous motion event.
1186 * For touch events on the screen, this is the original location of the event
1187 * on the screen, before it had been adjusted for the containing window
1189 * Whole numbers are pixels; the value may have a fraction for input devices
1190 * that are sub-pixel precise.
1192 float AMotionEvent_getHistoricalRawY(const AInputEvent* motion_event, size_t pointer_index,
1193 size_t history_index);
1196 * Get the historical X coordinate of this event for the given pointer index that
1197 * occurred between this event and the previous motion event.
1198 * Whole numbers are pixels; the value may have a fraction for input devices
1199 * that are sub-pixel precise.
1201 float AMotionEvent_getHistoricalX(const AInputEvent* motion_event, size_t pointer_index,
1202 size_t history_index);
1205 * Get the historical Y coordinate of this event for the given pointer index that
1206 * occurred between this event and the previous motion event.
1207 * Whole numbers are pixels; the value may have a fraction for input devices
1208 * that are sub-pixel precise.
1210 float AMotionEvent_getHistoricalY(const AInputEvent* motion_event, size_t pointer_index,
1211 size_t history_index);
1214 * Get the historical pressure of this event for the given pointer index that
1215 * occurred between this event and the previous motion event.
1216 * The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure),
1217 * although values higher than 1 may be generated depending on the calibration of
1220 float AMotionEvent_getHistoricalPressure(const AInputEvent* motion_event, size_t pointer_index,
1221 size_t history_index);
1224 * Get the current scaled value of the approximate size for the given pointer index that
1225 * occurred between this event and the previous motion event.
1226 * This represents some approximation of the area of the screen being
1227 * pressed; the actual value in pixels corresponding to the
1228 * touch is normalized with the device specific range of values
1229 * and scaled to a value between 0 and 1. The value of size can be used to
1230 * determine fat touch events.
1232 float AMotionEvent_getHistoricalSize(const AInputEvent* motion_event, size_t pointer_index,
1233 size_t history_index);
1236 * Get the historical length of the major axis of an ellipse that describes the touch area
1237 * at the point of contact for the given pointer index that
1238 * occurred between this event and the previous motion event.
1240 float AMotionEvent_getHistoricalTouchMajor(const AInputEvent* motion_event, size_t pointer_index,
1241 size_t history_index);
1244 * Get the historical length of the minor axis of an ellipse that describes the touch area
1245 * at the point of contact for the given pointer index that
1246 * occurred between this event and the previous motion event.
1248 float AMotionEvent_getHistoricalTouchMinor(const AInputEvent* motion_event, size_t pointer_index,
1249 size_t history_index);
1252 * Get the historical length of the major axis of an ellipse that describes the size
1253 * of the approaching tool for the given pointer index that
1254 * occurred between this event and the previous motion event.
1255 * The tool area represents the estimated size of the finger or pen that is
1256 * touching the device independent of its actual touch area at the point of contact.
1258 float AMotionEvent_getHistoricalToolMajor(const AInputEvent* motion_event, size_t pointer_index,
1259 size_t history_index);
1262 * Get the historical length of the minor axis of an ellipse that describes the size
1263 * of the approaching tool for the given pointer index that
1264 * occurred between this event and the previous motion event.
1265 * The tool area represents the estimated size of the finger or pen that is
1266 * touching the device independent of its actual touch area at the point of contact.
1268 float AMotionEvent_getHistoricalToolMinor(const AInputEvent* motion_event, size_t pointer_index,
1269 size_t history_index);
1272 * Get the historical orientation of the touch area and tool area in radians clockwise from
1273 * vertical for the given pointer index that
1274 * occurred between this event and the previous motion event.
1275 * An angle of 0 degrees indicates that the major axis of contact is oriented
1276 * upwards, is perfectly circular or is of unknown orientation. A positive angle
1277 * indicates that the major axis of contact is oriented to the right. A negative angle
1278 * indicates that the major axis of contact is oriented to the left.
1279 * The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
1280 * (finger pointing fully right).
1282 float AMotionEvent_getHistoricalOrientation(const AInputEvent* motion_event, size_t pointer_index,
1283 size_t history_index);
1285 #if __ANDROID_API__ >= 13
1287 * Get the historical value of the request axis for the given pointer index
1288 * that occurred between this event and the previous motion event.
1290 float AMotionEvent_getHistoricalAxisValue(const AInputEvent* motion_event,
1291 int32_t axis, size_t pointer_index, size_t history_index);
1299 * An input queue is the facility through which you retrieve input
1302 typedef struct AInputQueue AInputQueue;
1305 * Add this input queue to a looper for processing. See
1306 * ALooper_addFd() for information on the ident, callback, and data params.
1308 void AInputQueue_attachLooper(AInputQueue* queue, ALooper* looper,
1309 int ident, ALooper_callbackFunc callback, void* data);
1312 * Remove the input queue from the looper it is currently attached to.
1314 void AInputQueue_detachLooper(AInputQueue* queue);
1317 * Returns true if there are one or more events available in the
1318 * input queue. Returns 1 if the queue has events; 0 if
1319 * it does not have events; and a negative value if there is an error.
1321 int32_t AInputQueue_hasEvents(AInputQueue* queue);
1324 * Returns the next available event from the queue. Returns a negative
1325 * value if no events are available or an error has occurred.
1327 int32_t AInputQueue_getEvent(AInputQueue* queue, AInputEvent** outEvent);
1330 * Sends the key for standard pre-dispatching -- that is, possibly deliver
1331 * it to the current IME to be consumed before the app. Returns 0 if it
1332 * was not pre-dispatched, meaning you can process it right now. If non-zero
1333 * is returned, you must abandon the current event processing and allow the
1334 * event to appear again in the event queue (if it does not get consumed during
1337 int32_t AInputQueue_preDispatchEvent(AInputQueue* queue, AInputEvent* event);
1340 * Report that dispatching has finished with the given event.
1341 * This must be called after receiving an event with AInputQueue_get_event().
1343 void AInputQueue_finishEvent(AInputQueue* queue, AInputEvent* event, int handled);
1349 #endif // _ANDROID_INPUT_H