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 /******************************************************************
33 * This file is part of Android's set of stable system headers
34 * exposed by the Android NDK (Native Development Kit).
36 * Third-party source AND binary code relies on the definitions
37 * here to be FROZEN ON ALL UPCOMING PLATFORM RELEASES.
39 * - DO NOT MODIFY ENUMS (EXCEPT IF YOU ADD NEW 32-BIT VALUES)
40 * - DO NOT MODIFY CONSTANTS OR FUNCTIONAL MACROS
41 * - DO NOT CHANGE THE SIGNATURE OF FUNCTIONS IN ANY WAY
42 * - DO NOT CHANGE THE LAYOUT OR SIZE OF STRUCTURES
46 * Structures and functions to receive and process input events in
49 * NOTE: These functions MUST be implemented by /system/lib/libui.so
53 #include <sys/types.h>
54 #include <android/keycodes.h>
55 #include <android/looper.h>
62 * Key states (may be returned by queries about the current state of a
63 * particular key code, scan code or switch).
66 /** The key state is unknown or the requested key itself is not supported. */
67 AKEY_STATE_UNKNOWN = -1,
72 /** The key is down. */
75 /** The key is down but is a virtual key press that is being emulated by the system. */
76 AKEY_STATE_VIRTUAL = 2
80 * Meta key / modifer state.
83 /** No meta keys are pressed. */
86 /** This mask is used to check whether one of the ALT meta keys is pressed. */
89 /** This mask is used to check whether the left ALT meta key is pressed. */
90 AMETA_ALT_LEFT_ON = 0x10,
92 /** This mask is used to check whether the right ALT meta key is pressed. */
93 AMETA_ALT_RIGHT_ON = 0x20,
95 /** This mask is used to check whether one of the SHIFT meta keys is pressed. */
96 AMETA_SHIFT_ON = 0x01,
98 /** This mask is used to check whether the left SHIFT meta key is pressed. */
99 AMETA_SHIFT_LEFT_ON = 0x40,
101 /** This mask is used to check whether the right SHIFT meta key is pressed. */
102 AMETA_SHIFT_RIGHT_ON = 0x80,
104 /** This mask is used to check whether the SYM meta key is pressed. */
107 /** This mask is used to check whether the FUNCTION meta key is pressed. */
108 AMETA_FUNCTION_ON = 0x08,
110 /** This mask is used to check whether one of the CTRL meta keys is pressed. */
111 AMETA_CTRL_ON = 0x1000,
113 /** This mask is used to check whether the left CTRL meta key is pressed. */
114 AMETA_CTRL_LEFT_ON = 0x2000,
116 /** This mask is used to check whether the right CTRL meta key is pressed. */
117 AMETA_CTRL_RIGHT_ON = 0x4000,
119 /** This mask is used to check whether one of the META meta keys is pressed. */
120 AMETA_META_ON = 0x10000,
122 /** This mask is used to check whether the left META meta key is pressed. */
123 AMETA_META_LEFT_ON = 0x20000,
125 /** This mask is used to check whether the right META meta key is pressed. */
126 AMETA_META_RIGHT_ON = 0x40000,
128 /** This mask is used to check whether the CAPS LOCK meta key is on. */
129 AMETA_CAPS_LOCK_ON = 0x100000,
131 /** This mask is used to check whether the NUM LOCK meta key is on. */
132 AMETA_NUM_LOCK_ON = 0x200000,
134 /** This mask is used to check whether the SCROLL LOCK meta key is on. */
135 AMETA_SCROLL_LOCK_ON = 0x400000,
142 * Input events are opaque structures. Use the provided accessors functions to
143 * read their properties.
145 typedef struct AInputEvent AInputEvent;
151 /** Indicates that the input event is a key event. */
152 AINPUT_EVENT_TYPE_KEY = 1,
154 /** Indicates that the input event is a motion event. */
155 AINPUT_EVENT_TYPE_MOTION = 2
162 /** The key has been pressed down. */
163 AKEY_EVENT_ACTION_DOWN = 0,
165 /** The key has been released. */
166 AKEY_EVENT_ACTION_UP = 1,
169 * Multiple duplicate key events have occurred in a row, or a
170 * complex string is being delivered. The repeat_count property
171 * of the key event contains the number of times the given key
172 * code should be executed.
174 AKEY_EVENT_ACTION_MULTIPLE = 2
181 /** This mask is set if the device woke because of this key event. */
182 AKEY_EVENT_FLAG_WOKE_HERE = 0x1,
184 /** This mask is set if the key event was generated by a software keyboard. */
185 AKEY_EVENT_FLAG_SOFT_KEYBOARD = 0x2,
187 /** This mask is set if we don't want the key event to cause us to leave touch mode. */
188 AKEY_EVENT_FLAG_KEEP_TOUCH_MODE = 0x4,
191 * This mask is set if an event was known to come from a trusted
192 * part of the system. That is, the event is known to come from
193 * the user, and could not have been spoofed by a third party
196 AKEY_EVENT_FLAG_FROM_SYSTEM = 0x8,
199 * This mask is used for compatibility, to identify enter keys that are
200 * coming from an IME whose enter key has been auto-labelled "next" or
201 * "done". This allows TextView to dispatch these as normal enter keys
202 * for old applications, but still do the appropriate action when
205 AKEY_EVENT_FLAG_EDITOR_ACTION = 0x10,
208 * When associated with up key events, this indicates that the key press
209 * has been canceled. Typically this is used with virtual touch screen
210 * keys, where the user can slide from the virtual key area on to the
211 * display: in that case, the application will receive a canceled up
212 * event and should not perform the action normally associated with the
213 * key. Note that for this to work, the application can not perform an
214 * action for a key until it receives an up or the long press timeout has
217 AKEY_EVENT_FLAG_CANCELED = 0x20,
220 * This key event was generated by a virtual (on-screen) hard key area.
221 * Typically this is an area of the touchscreen, outside of the regular
222 * display, dedicated to "hardware" buttons.
224 AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY = 0x40,
227 * This flag is set for the first key repeat that occurs after the
228 * long press timeout.
230 AKEY_EVENT_FLAG_LONG_PRESS = 0x80,
233 * Set when a key event has AKEY_EVENT_FLAG_CANCELED set because a long
234 * press action was executed while it was down.
236 AKEY_EVENT_FLAG_CANCELED_LONG_PRESS = 0x100,
239 * Set for AKEY_EVENT_ACTION_UP when this event's key code is still being
240 * tracked from its initial down. That is, somebody requested that tracking
241 * started on the key down and a long press has not caused
242 * the tracking to be canceled.
244 AKEY_EVENT_FLAG_TRACKING = 0x200,
247 * Set when a key event has been synthesized to implement default behavior
248 * for an event that the application did not handle.
249 * Fallback key events are generated by unhandled trackball motions
250 * (to emulate a directional keypad) and by certain unhandled key presses
251 * that are declared in the key map (such as special function numeric keypad
252 * keys when numlock is off).
254 AKEY_EVENT_FLAG_FALLBACK = 0x400,
258 * Bit shift for the action bits holding the pointer index as
259 * defined by AMOTION_EVENT_ACTION_POINTER_INDEX_MASK.
261 #define AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT 8
263 /** Motion event actions */
265 /** Bit mask of the parts of the action code that are the action itself. */
266 AMOTION_EVENT_ACTION_MASK = 0xff,
269 * Bits in the action code that represent a pointer index, used with
270 * AMOTION_EVENT_ACTION_POINTER_DOWN and AMOTION_EVENT_ACTION_POINTER_UP. Shifting
271 * down by AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT provides the actual pointer
272 * index where the data for the pointer going up or down can be found.
274 AMOTION_EVENT_ACTION_POINTER_INDEX_MASK = 0xff00,
276 /** A pressed gesture has started, the motion contains the initial starting location. */
277 AMOTION_EVENT_ACTION_DOWN = 0,
280 * A pressed gesture has finished, the motion contains the final release location
281 * as well as any intermediate points since the last down or move event.
283 AMOTION_EVENT_ACTION_UP = 1,
286 * A change has happened during a press gesture (between AMOTION_EVENT_ACTION_DOWN and
287 * AMOTION_EVENT_ACTION_UP). The motion contains the most recent point, as well as
288 * any intermediate points since the last down or move event.
290 AMOTION_EVENT_ACTION_MOVE = 2,
293 * The current gesture has been aborted.
294 * You will not receive any more points in it. You should treat this as
295 * an up event, but not perform any action that you normally would.
297 AMOTION_EVENT_ACTION_CANCEL = 3,
300 * A movement has happened outside of the normal bounds of the UI element.
301 * This does not provide a full gesture, but only the initial location of the movement/touch.
303 AMOTION_EVENT_ACTION_OUTSIDE = 4,
306 * A non-primary pointer has gone down.
307 * The bits in AMOTION_EVENT_ACTION_POINTER_INDEX_MASK indicate which pointer changed.
309 AMOTION_EVENT_ACTION_POINTER_DOWN = 5,
312 * A non-primary pointer has gone up.
313 * The bits in AMOTION_EVENT_ACTION_POINTER_INDEX_MASK indicate which pointer changed.
315 AMOTION_EVENT_ACTION_POINTER_UP = 6,
318 * A change happened but the pointer is not down (unlike AMOTION_EVENT_ACTION_MOVE).
319 * The motion contains the most recent point, as well as any intermediate points since
320 * the last hover move event.
322 AMOTION_EVENT_ACTION_HOVER_MOVE = 7,
325 * The motion event contains relative vertical and/or horizontal scroll offsets.
326 * Use getAxisValue to retrieve the information from AMOTION_EVENT_AXIS_VSCROLL
327 * and AMOTION_EVENT_AXIS_HSCROLL.
328 * The pointer may or may not be down when this event is dispatched.
329 * This action is always delivered to the winder under the pointer, which
330 * may not be the window currently touched.
332 AMOTION_EVENT_ACTION_SCROLL = 8,
334 /** The pointer is not down but has entered the boundaries of a window or view. */
335 AMOTION_EVENT_ACTION_HOVER_ENTER = 9,
337 /** The pointer is not down but has exited the boundaries of a window or view. */
338 AMOTION_EVENT_ACTION_HOVER_EXIT = 10,
340 /* One or more buttons have been pressed. */
341 AMOTION_EVENT_ACTION_BUTTON_PRESS = 11,
343 /* One or more buttons have been released. */
344 AMOTION_EVENT_ACTION_BUTTON_RELEASE = 12,
348 * Motion event flags.
352 * This flag indicates that the window that received this motion event is partly
353 * or wholly obscured by another visible window above it. This flag is set to true
354 * even if the event did not directly pass through the obscured area.
355 * A security sensitive application can check this flag to identify situations in which
356 * a malicious application may have covered up part of its content for the purpose
357 * of misleading the user or hijacking touches. An appropriate response might be
358 * to drop the suspect touches or to take additional precautions to confirm the user's
361 AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED = 0x1,
365 * Motion event edge touch flags.
368 /** No edges intersected. */
369 AMOTION_EVENT_EDGE_FLAG_NONE = 0,
371 /** Flag indicating the motion event intersected the top edge of the screen. */
372 AMOTION_EVENT_EDGE_FLAG_TOP = 0x01,
374 /** Flag indicating the motion event intersected the bottom edge of the screen. */
375 AMOTION_EVENT_EDGE_FLAG_BOTTOM = 0x02,
377 /** Flag indicating the motion event intersected the left edge of the screen. */
378 AMOTION_EVENT_EDGE_FLAG_LEFT = 0x04,
380 /** Flag indicating the motion event intersected the right edge of the screen. */
381 AMOTION_EVENT_EDGE_FLAG_RIGHT = 0x08
385 * Constants that identify each individual axis of a motion event.
386 * @anchor AMOTION_EVENT_AXIS
390 * Axis constant: X axis of a motion event.
392 * - For a touch screen, reports the absolute X screen position of the center of
393 * the touch contact area. The units are display pixels.
394 * - For a touch pad, reports the absolute X surface position of the center of the touch
395 * contact area. The units are device-dependent.
396 * - For a mouse, reports the absolute X screen position of the mouse pointer.
397 * The units are display pixels.
398 * - For a trackball, reports the relative horizontal displacement of the trackball.
399 * The value is normalized to a range from -1.0 (left) to 1.0 (right).
400 * - For a joystick, reports the absolute X position of the joystick.
401 * The value is normalized to a range from -1.0 (left) to 1.0 (right).
403 AMOTION_EVENT_AXIS_X = 0,
405 * Axis constant: Y axis of a motion event.
407 * - For a touch screen, reports the absolute Y screen position of the center of
408 * the touch contact area. The units are display pixels.
409 * - For a touch pad, reports the absolute Y surface position of the center of the touch
410 * contact area. The units are device-dependent.
411 * - For a mouse, reports the absolute Y screen position of the mouse pointer.
412 * The units are display pixels.
413 * - For a trackball, reports the relative vertical displacement of the trackball.
414 * The value is normalized to a range from -1.0 (up) to 1.0 (down).
415 * - For a joystick, reports the absolute Y position of the joystick.
416 * The value is normalized to a range from -1.0 (up or far) to 1.0 (down or near).
418 AMOTION_EVENT_AXIS_Y = 1,
420 * Axis constant: Pressure axis of a motion event.
422 * - For a touch screen or touch pad, reports the approximate pressure applied to the surface
423 * by a finger or other tool. The value is normalized to a range from
424 * 0 (no pressure at all) to 1 (normal pressure), although values higher than 1
425 * may be generated depending on the calibration of the input device.
426 * - For a trackball, the value is set to 1 if the trackball button is pressed
428 * - For a mouse, the value is set to 1 if the primary mouse button is pressed
431 AMOTION_EVENT_AXIS_PRESSURE = 2,
433 * Axis constant: Size axis of a motion event.
435 * - For a touch screen or touch pad, reports the approximate size of the contact area in
436 * relation to the maximum detectable size for the device. The value is normalized
437 * to a range from 0 (smallest detectable size) to 1 (largest detectable size),
438 * although it is not a linear scale. This value is of limited use.
439 * To obtain calibrated size information, see
440 * {@link AMOTION_EVENT_AXIS_TOUCH_MAJOR} or {@link AMOTION_EVENT_AXIS_TOOL_MAJOR}.
442 AMOTION_EVENT_AXIS_SIZE = 3,
444 * Axis constant: TouchMajor axis of a motion event.
446 * - For a touch screen, reports the length of the major axis of an ellipse that
447 * represents the touch area at the point of contact.
448 * The units are display pixels.
449 * - For a touch pad, reports the length of the major axis of an ellipse that
450 * represents the touch area at the point of contact.
451 * The units are device-dependent.
453 AMOTION_EVENT_AXIS_TOUCH_MAJOR = 4,
455 * Axis constant: TouchMinor axis of a motion event.
457 * - For a touch screen, reports the length of the minor axis of an ellipse that
458 * represents the touch area at the point of contact.
459 * The units are display pixels.
460 * - For a touch pad, reports the length of the minor axis of an ellipse that
461 * represents the touch area at the point of contact.
462 * The units are device-dependent.
464 * When the touch is circular, the major and minor axis lengths will be equal to one another.
466 AMOTION_EVENT_AXIS_TOUCH_MINOR = 5,
468 * Axis constant: ToolMajor axis of a motion event.
470 * - For a touch screen, reports the length of the major axis of an ellipse that
471 * represents the size of the approaching finger or tool used to make contact.
472 * - For a touch pad, 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 * The units are device-dependent.
476 * When the touch is circular, the major and minor axis lengths will be equal to one another.
478 * The tool size may be larger than the touch size since the tool may not be fully
479 * in contact with the touch sensor.
481 AMOTION_EVENT_AXIS_TOOL_MAJOR = 6,
483 * Axis constant: ToolMinor axis of a motion event.
485 * - For a touch screen, reports the length of the minor axis of an ellipse that
486 * represents the size of the approaching finger or tool used to make contact.
487 * - For a touch pad, 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 * The units are device-dependent.
491 * When the touch is circular, the major and minor axis lengths will be equal to one another.
493 * The tool size may be larger than the touch size since the tool may not be fully
494 * in contact with the touch sensor.
496 AMOTION_EVENT_AXIS_TOOL_MINOR = 7,
498 * Axis constant: Orientation axis of a motion event.
500 * - For a touch screen or touch pad, reports the orientation of the finger
501 * or tool in radians relative to the vertical plane of the device.
502 * An angle of 0 radians indicates that the major axis of contact is oriented
503 * upwards, is perfectly circular or is of unknown orientation. A positive angle
504 * indicates that the major axis of contact is oriented to the right. A negative angle
505 * indicates that the major axis of contact is oriented to the left.
506 * The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
507 * (finger pointing fully right).
508 * - For a stylus, the orientation indicates the direction in which the stylus
509 * is pointing in relation to the vertical axis of the current orientation of the screen.
510 * The range is from -PI radians to PI radians, where 0 is pointing up,
511 * -PI/2 radians is pointing left, -PI or PI radians is pointing down, and PI/2 radians
512 * is pointing right. See also {@link AMOTION_EVENT_AXIS_TILT}.
514 AMOTION_EVENT_AXIS_ORIENTATION = 8,
516 * Axis constant: Vertical Scroll axis of a motion event.
518 * - For a mouse, reports the relative movement of the vertical scroll wheel.
519 * The value is normalized to a range from -1.0 (down) to 1.0 (up).
521 * This axis should be used to scroll views vertically.
523 AMOTION_EVENT_AXIS_VSCROLL = 9,
525 * Axis constant: Horizontal Scroll axis of a motion event.
527 * - For a mouse, reports the relative movement of the horizontal scroll wheel.
528 * The value is normalized to a range from -1.0 (left) to 1.0 (right).
530 * This axis should be used to scroll views horizontally.
532 AMOTION_EVENT_AXIS_HSCROLL = 10,
534 * Axis constant: Z axis of a motion event.
536 * - For a joystick, reports the absolute Z position of the joystick.
537 * The value is normalized to a range from -1.0 (high) to 1.0 (low).
538 * <em>On game pads with two analog joysticks, this axis is often reinterpreted
539 * to report the absolute X position of the second joystick instead.</em>
541 AMOTION_EVENT_AXIS_Z = 11,
543 * Axis constant: X Rotation axis of a motion event.
545 * - For a joystick, reports the absolute rotation angle about the X axis.
546 * The value is normalized to a range from -1.0 (counter-clockwise) to 1.0 (clockwise).
548 AMOTION_EVENT_AXIS_RX = 12,
550 * Axis constant: Y Rotation axis of a motion event.
552 * - For a joystick, reports the absolute rotation angle about the Y axis.
553 * The value is normalized to a range from -1.0 (counter-clockwise) to 1.0 (clockwise).
555 AMOTION_EVENT_AXIS_RY = 13,
557 * Axis constant: Z Rotation axis of a motion event.
559 * - For a joystick, reports the absolute rotation angle about the Z axis.
560 * The value is normalized to a range from -1.0 (counter-clockwise) to 1.0 (clockwise).
561 * On game pads with two analog joysticks, this axis is often reinterpreted
562 * to report the absolute Y position of the second joystick instead.
564 AMOTION_EVENT_AXIS_RZ = 14,
566 * Axis constant: Hat X axis of a motion event.
568 * - For a joystick, reports the absolute X position of the directional hat control.
569 * The value is normalized to a range from -1.0 (left) to 1.0 (right).
571 AMOTION_EVENT_AXIS_HAT_X = 15,
573 * Axis constant: Hat Y axis of a motion event.
575 * - For a joystick, reports the absolute Y position of the directional hat control.
576 * The value is normalized to a range from -1.0 (up) to 1.0 (down).
578 AMOTION_EVENT_AXIS_HAT_Y = 16,
580 * Axis constant: Left Trigger axis of a motion event.
582 * - For a joystick, reports the absolute position of the left trigger control.
583 * The value is normalized to a range from 0.0 (released) to 1.0 (fully pressed).
585 AMOTION_EVENT_AXIS_LTRIGGER = 17,
587 * Axis constant: Right Trigger axis of a motion event.
589 * - For a joystick, reports the absolute position of the right trigger control.
590 * The value is normalized to a range from 0.0 (released) to 1.0 (fully pressed).
592 AMOTION_EVENT_AXIS_RTRIGGER = 18,
594 * Axis constant: Throttle axis of a motion event.
596 * - For a joystick, reports the absolute position of the throttle control.
597 * The value is normalized to a range from 0.0 (fully open) to 1.0 (fully closed).
599 AMOTION_EVENT_AXIS_THROTTLE = 19,
601 * Axis constant: Rudder axis of a motion event.
603 * - For a joystick, reports the absolute position of the rudder control.
604 * The value is normalized to a range from -1.0 (turn left) to 1.0 (turn right).
606 AMOTION_EVENT_AXIS_RUDDER = 20,
608 * Axis constant: Wheel axis of a motion event.
610 * - For a joystick, reports the absolute position of the steering wheel control.
611 * The value is normalized to a range from -1.0 (turn left) to 1.0 (turn right).
613 AMOTION_EVENT_AXIS_WHEEL = 21,
615 * Axis constant: Gas axis of a motion event.
617 * - For a joystick, reports the absolute position of the gas (accelerator) control.
618 * The value is normalized to a range from 0.0 (no acceleration)
619 * to 1.0 (maximum acceleration).
621 AMOTION_EVENT_AXIS_GAS = 22,
623 * Axis constant: Brake axis of a motion event.
625 * - For a joystick, reports the absolute position of the brake control.
626 * The value is normalized to a range from 0.0 (no braking) to 1.0 (maximum braking).
628 AMOTION_EVENT_AXIS_BRAKE = 23,
630 * Axis constant: Distance axis of a motion event.
632 * - For a stylus, reports the distance of the stylus from the screen.
633 * A value of 0.0 indicates direct contact and larger values indicate increasing
634 * distance from the surface.
636 AMOTION_EVENT_AXIS_DISTANCE = 24,
638 * Axis constant: Tilt axis of a motion event.
640 * - For a stylus, reports the tilt angle of the stylus in radians where
641 * 0 radians indicates that the stylus is being held perpendicular to the
642 * surface, and PI/2 radians indicates that the stylus is being held flat
643 * against the surface.
645 AMOTION_EVENT_AXIS_TILT = 25,
647 * Axis constant: Generic 1 axis of a motion event.
648 * The interpretation of a generic axis is device-specific.
650 AMOTION_EVENT_AXIS_GENERIC_1 = 32,
652 * Axis constant: Generic 2 axis of a motion event.
653 * The interpretation of a generic axis is device-specific.
655 AMOTION_EVENT_AXIS_GENERIC_2 = 33,
657 * Axis constant: Generic 3 axis of a motion event.
658 * The interpretation of a generic axis is device-specific.
660 AMOTION_EVENT_AXIS_GENERIC_3 = 34,
662 * Axis constant: Generic 4 axis of a motion event.
663 * The interpretation of a generic axis is device-specific.
665 AMOTION_EVENT_AXIS_GENERIC_4 = 35,
667 * Axis constant: Generic 5 axis of a motion event.
668 * The interpretation of a generic axis is device-specific.
670 AMOTION_EVENT_AXIS_GENERIC_5 = 36,
672 * Axis constant: Generic 6 axis of a motion event.
673 * The interpretation of a generic axis is device-specific.
675 AMOTION_EVENT_AXIS_GENERIC_6 = 37,
677 * Axis constant: Generic 7 axis of a motion event.
678 * The interpretation of a generic axis is device-specific.
680 AMOTION_EVENT_AXIS_GENERIC_7 = 38,
682 * Axis constant: Generic 8 axis of a motion event.
683 * The interpretation of a generic axis is device-specific.
685 AMOTION_EVENT_AXIS_GENERIC_8 = 39,
687 * Axis constant: Generic 9 axis of a motion event.
688 * The interpretation of a generic axis is device-specific.
690 AMOTION_EVENT_AXIS_GENERIC_9 = 40,
692 * Axis constant: Generic 10 axis of a motion event.
693 * The interpretation of a generic axis is device-specific.
695 AMOTION_EVENT_AXIS_GENERIC_10 = 41,
697 * Axis constant: Generic 11 axis of a motion event.
698 * The interpretation of a generic axis is device-specific.
700 AMOTION_EVENT_AXIS_GENERIC_11 = 42,
702 * Axis constant: Generic 12 axis of a motion event.
703 * The interpretation of a generic axis is device-specific.
705 AMOTION_EVENT_AXIS_GENERIC_12 = 43,
707 * Axis constant: Generic 13 axis of a motion event.
708 * The interpretation of a generic axis is device-specific.
710 AMOTION_EVENT_AXIS_GENERIC_13 = 44,
712 * Axis constant: Generic 14 axis of a motion event.
713 * The interpretation of a generic axis is device-specific.
715 AMOTION_EVENT_AXIS_GENERIC_14 = 45,
717 * Axis constant: Generic 15 axis of a motion event.
718 * The interpretation of a generic axis is device-specific.
720 AMOTION_EVENT_AXIS_GENERIC_15 = 46,
722 * Axis constant: Generic 16 axis of a motion event.
723 * The interpretation of a generic axis is device-specific.
725 AMOTION_EVENT_AXIS_GENERIC_16 = 47,
727 // NOTE: If you add a new axis here you must also add it to several other files.
728 // Refer to frameworks/base/core/java/android/view/MotionEvent.java for the full list.
732 * Constants that identify buttons that are associated with motion events.
733 * Refer to the documentation on the MotionEvent class for descriptions of each button.
737 AMOTION_EVENT_BUTTON_PRIMARY = 1 << 0,
739 AMOTION_EVENT_BUTTON_SECONDARY = 1 << 1,
741 AMOTION_EVENT_BUTTON_TERTIARY = 1 << 2,
743 AMOTION_EVENT_BUTTON_BACK = 1 << 3,
745 AMOTION_EVENT_BUTTON_FORWARD = 1 << 4,
746 AMOTION_EVENT_BUTTON_STYLUS_PRIMARY = 1 << 5,
747 AMOTION_EVENT_BUTTON_STYLUS_SECONDARY = 1 << 6,
751 * Constants that identify tool types.
752 * Refer to the documentation on the MotionEvent class for descriptions of each tool type.
756 AMOTION_EVENT_TOOL_TYPE_UNKNOWN = 0,
758 AMOTION_EVENT_TOOL_TYPE_FINGER = 1,
760 AMOTION_EVENT_TOOL_TYPE_STYLUS = 2,
762 AMOTION_EVENT_TOOL_TYPE_MOUSE = 3,
764 AMOTION_EVENT_TOOL_TYPE_ERASER = 4,
768 * Input source masks.
770 * Refer to the documentation on android.view.InputDevice for more details about input sources
771 * and their correct interpretation.
775 AINPUT_SOURCE_CLASS_MASK = 0x000000ff,
778 AINPUT_SOURCE_CLASS_NONE = 0x00000000,
780 AINPUT_SOURCE_CLASS_BUTTON = 0x00000001,
782 AINPUT_SOURCE_CLASS_POINTER = 0x00000002,
784 AINPUT_SOURCE_CLASS_NAVIGATION = 0x00000004,
786 AINPUT_SOURCE_CLASS_POSITION = 0x00000008,
788 AINPUT_SOURCE_CLASS_JOYSTICK = 0x00000010,
796 AINPUT_SOURCE_UNKNOWN = 0x00000000,
799 AINPUT_SOURCE_KEYBOARD = 0x00000100 | AINPUT_SOURCE_CLASS_BUTTON,
801 AINPUT_SOURCE_DPAD = 0x00000200 | AINPUT_SOURCE_CLASS_BUTTON,
803 AINPUT_SOURCE_GAMEPAD = 0x00000400 | AINPUT_SOURCE_CLASS_BUTTON,
805 AINPUT_SOURCE_TOUCHSCREEN = 0x00001000 | AINPUT_SOURCE_CLASS_POINTER,
807 AINPUT_SOURCE_MOUSE = 0x00002000 | AINPUT_SOURCE_CLASS_POINTER,
809 AINPUT_SOURCE_STYLUS = 0x00004000 | AINPUT_SOURCE_CLASS_POINTER,
811 AINPUT_SOURCE_TRACKBALL = 0x00010000 | AINPUT_SOURCE_CLASS_NAVIGATION,
813 AINPUT_SOURCE_TOUCHPAD = 0x00100000 | AINPUT_SOURCE_CLASS_POSITION,
815 AINPUT_SOURCE_TOUCH_NAVIGATION = 0x00200000 | AINPUT_SOURCE_CLASS_NONE,
817 AINPUT_SOURCE_JOYSTICK = 0x01000000 | AINPUT_SOURCE_CLASS_JOYSTICK,
820 AINPUT_SOURCE_ANY = 0xffffff00,
826 * Refer to the documentation on android.view.InputDevice for more details.
830 AINPUT_KEYBOARD_TYPE_NONE = 0,
831 /** non alphabetic */
832 AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC = 1,
834 AINPUT_KEYBOARD_TYPE_ALPHABETIC = 2,
838 * Constants used to retrieve information about the range of motion for a particular
839 * coordinate of a motion event.
841 * Refer to the documentation on android.view.InputDevice for more details about input sources
842 * and their correct interpretation.
844 * @deprecated These constants are deprecated. Use {@link AMOTION_EVENT_AXIS AMOTION_EVENT_AXIS_*} constants instead.
848 AINPUT_MOTION_RANGE_X = AMOTION_EVENT_AXIS_X,
850 AINPUT_MOTION_RANGE_Y = AMOTION_EVENT_AXIS_Y,
852 AINPUT_MOTION_RANGE_PRESSURE = AMOTION_EVENT_AXIS_PRESSURE,
854 AINPUT_MOTION_RANGE_SIZE = AMOTION_EVENT_AXIS_SIZE,
856 AINPUT_MOTION_RANGE_TOUCH_MAJOR = AMOTION_EVENT_AXIS_TOUCH_MAJOR,
858 AINPUT_MOTION_RANGE_TOUCH_MINOR = AMOTION_EVENT_AXIS_TOUCH_MINOR,
860 AINPUT_MOTION_RANGE_TOOL_MAJOR = AMOTION_EVENT_AXIS_TOOL_MAJOR,
862 AINPUT_MOTION_RANGE_TOOL_MINOR = AMOTION_EVENT_AXIS_TOOL_MINOR,
864 AINPUT_MOTION_RANGE_ORIENTATION = AMOTION_EVENT_AXIS_ORIENTATION,
869 * Input event accessors.
871 * Note that most functions can only be used on input events that are of a given type.
872 * Calling these functions on input events of other types will yield undefined behavior.
875 /*** Accessors for all input events. ***/
877 /** Get the input event type. */
878 int32_t AInputEvent_getType(const AInputEvent* event);
880 /** Get the id for the device that an input event came from.
882 * Input events can be generated by multiple different input devices.
883 * Use the input device id to obtain information about the input
884 * device that was responsible for generating a particular event.
886 * An input device id of 0 indicates that the event didn't come from a physical device;
887 * other numbers are arbitrary and you shouldn't depend on the values.
888 * Use the provided input device query API to obtain information about input devices.
890 int32_t AInputEvent_getDeviceId(const AInputEvent* event);
892 /** Get the input event source. */
893 int32_t AInputEvent_getSource(const AInputEvent* event);
895 /*** Accessors for key events only. ***/
897 /** Get the key event action. */
898 int32_t AKeyEvent_getAction(const AInputEvent* key_event);
900 /** Get the key event flags. */
901 int32_t AKeyEvent_getFlags(const AInputEvent* key_event);
904 * Get the key code of the key event.
905 * This is the physical key that was pressed, not the Unicode character.
907 int32_t AKeyEvent_getKeyCode(const AInputEvent* key_event);
910 * Get the hardware key id of this key event.
911 * These values are not reliable and vary from device to device.
913 int32_t AKeyEvent_getScanCode(const AInputEvent* key_event);
915 /** Get the meta key state. */
916 int32_t AKeyEvent_getMetaState(const AInputEvent* key_event);
919 * Get the repeat count of the event.
920 * For both key up an key down events, this is the number of times the key has
921 * repeated with the first down starting at 0 and counting up from there. For
922 * multiple key events, this is the number of down/up pairs that have occurred.
924 int32_t AKeyEvent_getRepeatCount(const AInputEvent* key_event);
927 * Get the time of the most recent key down event, in the
928 * java.lang.System.nanoTime() time base. If this is a down event,
929 * this will be the same as eventTime.
930 * Note that when chording keys, this value is the down time of the most recently
931 * pressed key, which may not be the same physical key of this event.
933 int64_t AKeyEvent_getDownTime(const AInputEvent* key_event);
936 * Get the time this event occurred, in the
937 * java.lang.System.nanoTime() time base.
939 int64_t AKeyEvent_getEventTime(const AInputEvent* key_event);
941 /*** Accessors for motion events only. ***/
943 /** Get the combined motion event action code and pointer index. */
944 int32_t AMotionEvent_getAction(const AInputEvent* motion_event);
946 /** Get the motion event flags. */
947 int32_t AMotionEvent_getFlags(const AInputEvent* motion_event);
950 * Get the state of any meta / modifier keys that were in effect when the
951 * event was generated.
953 int32_t AMotionEvent_getMetaState(const AInputEvent* motion_event);
955 /** Get the button state of all buttons that are pressed. */
956 int32_t AMotionEvent_getButtonState(const AInputEvent* motion_event);
959 * Get a bitfield indicating which edges, if any, were touched by this motion event.
960 * For touch events, clients can use this to determine if the user's finger was
961 * touching the edge of the display.
963 int32_t AMotionEvent_getEdgeFlags(const AInputEvent* motion_event);
966 * Get the time when the user originally pressed down to start a stream of
967 * position events, in the java.lang.System.nanoTime() time base.
969 int64_t AMotionEvent_getDownTime(const AInputEvent* motion_event);
972 * Get the time when this specific event was generated,
973 * in the java.lang.System.nanoTime() time base.
975 int64_t AMotionEvent_getEventTime(const AInputEvent* motion_event);
978 * Get the X coordinate offset.
979 * For touch events on the screen, this is the delta that was added to the raw
980 * screen coordinates to adjust for the absolute position of the containing windows
983 float AMotionEvent_getXOffset(const AInputEvent* motion_event);
986 * Get the Y coordinate offset.
987 * For touch events on the screen, this is the delta that was added to the raw
988 * screen coordinates to adjust for the absolute position of the containing windows
991 float AMotionEvent_getYOffset(const AInputEvent* motion_event);
994 * Get the precision of the X coordinates being reported.
995 * You can multiply this number with an X coordinate sample to find the
996 * actual hardware value of the X coordinate.
998 float AMotionEvent_getXPrecision(const AInputEvent* motion_event);
1001 * Get the precision of the Y coordinates being reported.
1002 * You can multiply this number with a Y coordinate sample to find the
1003 * actual hardware value of the Y coordinate.
1005 float AMotionEvent_getYPrecision(const AInputEvent* motion_event);
1008 * Get the number of pointers of data contained in this event.
1011 size_t AMotionEvent_getPointerCount(const AInputEvent* motion_event);
1014 * Get the pointer identifier associated with a particular pointer
1015 * data index in this event. The identifier tells you the actual pointer
1016 * number associated with the data, accounting for individual pointers
1017 * going up and down since the start of the current gesture.
1019 int32_t AMotionEvent_getPointerId(const AInputEvent* motion_event, size_t pointer_index);
1022 * Get the tool type of a pointer for the given pointer index.
1023 * The tool type indicates the type of tool used to make contact such as a
1024 * finger or stylus, if known.
1026 int32_t AMotionEvent_getToolType(const AInputEvent* motion_event, size_t pointer_index);
1029 * Get the original raw X coordinate of this event.
1030 * For touch events on the screen, this is the original location of the event
1031 * on the screen, before it had been adjusted for the containing window
1034 float AMotionEvent_getRawX(const AInputEvent* motion_event, size_t pointer_index);
1037 * Get the original raw X coordinate of this event.
1038 * For touch events on the screen, this is the original location of the event
1039 * on the screen, before it had been adjusted for the containing window
1042 float AMotionEvent_getRawY(const AInputEvent* motion_event, size_t pointer_index);
1045 * Get the current X coordinate of this event for the given pointer index.
1046 * Whole numbers are pixels; the value may have a fraction for input devices
1047 * that are sub-pixel precise.
1049 float AMotionEvent_getX(const AInputEvent* motion_event, size_t pointer_index);
1052 * Get the current Y coordinate of this event for the given pointer index.
1053 * Whole numbers are pixels; the value may have a fraction for input devices
1054 * that are sub-pixel precise.
1056 float AMotionEvent_getY(const AInputEvent* motion_event, size_t pointer_index);
1059 * Get the current pressure of this event for the given pointer index.
1060 * The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure),
1061 * although values higher than 1 may be generated depending on the calibration of
1064 float AMotionEvent_getPressure(const AInputEvent* motion_event, size_t pointer_index);
1067 * Get the current scaled value of the approximate size for the given pointer index.
1068 * This represents some approximation of the area of the screen being
1069 * pressed; the actual value in pixels corresponding to the
1070 * touch is normalized with the device specific range of values
1071 * and scaled to a value between 0 and 1. The value of size can be used to
1072 * determine fat touch events.
1074 float AMotionEvent_getSize(const AInputEvent* motion_event, size_t pointer_index);
1077 * Get the current length of the major axis of an ellipse that describes the touch area
1078 * at the point of contact for the given pointer index.
1080 float AMotionEvent_getTouchMajor(const AInputEvent* motion_event, size_t pointer_index);
1083 * Get the current length of the minor axis of an ellipse that describes the touch area
1084 * at the point of contact for the given pointer index.
1086 float AMotionEvent_getTouchMinor(const AInputEvent* motion_event, size_t pointer_index);
1089 * Get the current length of the major axis of an ellipse that describes the size
1090 * of the approaching tool for the given pointer index.
1091 * The tool area represents the estimated size of the finger or pen that is
1092 * touching the device independent of its actual touch area at the point of contact.
1094 float AMotionEvent_getToolMajor(const AInputEvent* motion_event, size_t pointer_index);
1097 * Get the current length of the minor axis of an ellipse that describes the size
1098 * of the approaching tool for the given pointer index.
1099 * The tool area represents the estimated size of the finger or pen that is
1100 * touching the device independent of its actual touch area at the point of contact.
1102 float AMotionEvent_getToolMinor(const AInputEvent* motion_event, size_t pointer_index);
1105 * Get the current orientation of the touch area and tool area in radians clockwise from
1106 * vertical for the given pointer index.
1107 * An angle of 0 degrees indicates that the major axis of contact is oriented
1108 * upwards, is perfectly circular or is of unknown orientation. A positive angle
1109 * indicates that the major axis of contact is oriented to the right. A negative angle
1110 * indicates that the major axis of contact is oriented to the left.
1111 * The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
1112 * (finger pointing fully right).
1114 float AMotionEvent_getOrientation(const AInputEvent* motion_event, size_t pointer_index);
1116 /** Get the value of the request axis for the given pointer index. */
1117 float AMotionEvent_getAxisValue(const AInputEvent* motion_event,
1118 int32_t axis, size_t pointer_index);
1121 * Get the number of historical points in this event. These are movements that
1122 * have occurred between this event and the previous event. This only applies
1123 * to AMOTION_EVENT_ACTION_MOVE events -- all other actions will have a size of 0.
1124 * Historical samples are indexed from oldest to newest.
1126 size_t AMotionEvent_getHistorySize(const AInputEvent* motion_event);
1129 * Get the time that a historical movement occurred between this event and
1130 * the previous event, in the java.lang.System.nanoTime() time base.
1132 int64_t AMotionEvent_getHistoricalEventTime(const AInputEvent* motion_event,
1133 size_t history_index);
1136 * Get the historical raw X coordinate of this event for the given pointer index that
1137 * occurred between this event and the previous motion event.
1138 * For touch events on the screen, this is the original location of the event
1139 * on the screen, before it had been adjusted for the containing window
1141 * Whole numbers are pixels; the value may have a fraction for input devices
1142 * that are sub-pixel precise.
1144 float AMotionEvent_getHistoricalRawX(const AInputEvent* motion_event, size_t pointer_index,
1145 size_t history_index);
1148 * Get the historical raw Y coordinate of this event for the given pointer index that
1149 * occurred between this event and the previous motion event.
1150 * For touch events on the screen, this is the original location of the event
1151 * on the screen, before it had been adjusted for the containing window
1153 * Whole numbers are pixels; the value may have a fraction for input devices
1154 * that are sub-pixel precise.
1156 float AMotionEvent_getHistoricalRawY(const AInputEvent* motion_event, size_t pointer_index,
1157 size_t history_index);
1160 * Get the historical X coordinate of this event for the given pointer index that
1161 * occurred between this event and the previous motion event.
1162 * Whole numbers are pixels; the value may have a fraction for input devices
1163 * that are sub-pixel precise.
1165 float AMotionEvent_getHistoricalX(const AInputEvent* motion_event, size_t pointer_index,
1166 size_t history_index);
1169 * Get the historical Y coordinate of this event for the given pointer index that
1170 * occurred between this event and the previous motion event.
1171 * Whole numbers are pixels; the value may have a fraction for input devices
1172 * that are sub-pixel precise.
1174 float AMotionEvent_getHistoricalY(const AInputEvent* motion_event, size_t pointer_index,
1175 size_t history_index);
1178 * Get the historical pressure of this event for the given pointer index that
1179 * occurred between this event and the previous motion event.
1180 * The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure),
1181 * although values higher than 1 may be generated depending on the calibration of
1184 float AMotionEvent_getHistoricalPressure(const AInputEvent* motion_event, size_t pointer_index,
1185 size_t history_index);
1188 * Get the current scaled value of the approximate size for the given pointer index that
1189 * occurred between this event and the previous motion event.
1190 * This represents some approximation of the area of the screen being
1191 * pressed; the actual value in pixels corresponding to the
1192 * touch is normalized with the device specific range of values
1193 * and scaled to a value between 0 and 1. The value of size can be used to
1194 * determine fat touch events.
1196 float AMotionEvent_getHistoricalSize(const AInputEvent* motion_event, size_t pointer_index,
1197 size_t history_index);
1200 * Get the historical length of the major axis of an ellipse that describes the touch area
1201 * at the point of contact for the given pointer index that
1202 * occurred between this event and the previous motion event.
1204 float AMotionEvent_getHistoricalTouchMajor(const AInputEvent* motion_event, size_t pointer_index,
1205 size_t history_index);
1208 * Get the historical length of the minor axis of an ellipse that describes the touch area
1209 * at the point of contact for the given pointer index that
1210 * occurred between this event and the previous motion event.
1212 float AMotionEvent_getHistoricalTouchMinor(const AInputEvent* motion_event, size_t pointer_index,
1213 size_t history_index);
1216 * Get the historical length of the major axis of an ellipse that describes the size
1217 * of the approaching tool for the given pointer index that
1218 * occurred between this event and the previous motion event.
1219 * The tool area represents the estimated size of the finger or pen that is
1220 * touching the device independent of its actual touch area at the point of contact.
1222 float AMotionEvent_getHistoricalToolMajor(const AInputEvent* motion_event, size_t pointer_index,
1223 size_t history_index);
1226 * Get the historical length of the minor axis of an ellipse that describes the size
1227 * of the approaching tool for the given pointer index that
1228 * occurred between this event and the previous motion event.
1229 * The tool area represents the estimated size of the finger or pen that is
1230 * touching the device independent of its actual touch area at the point of contact.
1232 float AMotionEvent_getHistoricalToolMinor(const AInputEvent* motion_event, size_t pointer_index,
1233 size_t history_index);
1236 * Get the historical orientation of the touch area and tool area in radians clockwise from
1237 * vertical for the given pointer index that
1238 * occurred between this event and the previous motion event.
1239 * An angle of 0 degrees indicates that the major axis of contact is oriented
1240 * upwards, is perfectly circular or is of unknown orientation. A positive angle
1241 * indicates that the major axis of contact is oriented to the right. A negative angle
1242 * indicates that the major axis of contact is oriented to the left.
1243 * The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
1244 * (finger pointing fully right).
1246 float AMotionEvent_getHistoricalOrientation(const AInputEvent* motion_event, size_t pointer_index,
1247 size_t history_index);
1250 * Get the historical value of the request axis for the given pointer index
1251 * that occurred between this event and the previous motion event.
1253 float AMotionEvent_getHistoricalAxisValue(const AInputEvent* motion_event,
1254 int32_t axis, size_t pointer_index, size_t history_index);
1261 * An input queue is the facility through which you retrieve input
1264 typedef struct AInputQueue AInputQueue;
1267 * Add this input queue to a looper for processing. See
1268 * ALooper_addFd() for information on the ident, callback, and data params.
1270 void AInputQueue_attachLooper(AInputQueue* queue, ALooper* looper,
1271 int ident, ALooper_callbackFunc callback, void* data);
1274 * Remove the input queue from the looper it is currently attached to.
1276 void AInputQueue_detachLooper(AInputQueue* queue);
1279 * Returns true if there are one or more events available in the
1280 * input queue. Returns 1 if the queue has events; 0 if
1281 * it does not have events; and a negative value if there is an error.
1283 int32_t AInputQueue_hasEvents(AInputQueue* queue);
1286 * Returns the next available event from the queue. Returns a negative
1287 * value if no events are available or an error has occurred.
1289 int32_t AInputQueue_getEvent(AInputQueue* queue, AInputEvent** outEvent);
1292 * Sends the key for standard pre-dispatching -- that is, possibly deliver
1293 * it to the current IME to be consumed before the app. Returns 0 if it
1294 * was not pre-dispatched, meaning you can process it right now. If non-zero
1295 * is returned, you must abandon the current event processing and allow the
1296 * event to appear again in the event queue (if it does not get consumed during
1299 int32_t AInputQueue_preDispatchEvent(AInputQueue* queue, AInputEvent* event);
1302 * Report that dispatching has finished with the given event.
1303 * This must be called after receiving an event with AInputQueue_get_event().
1305 void AInputQueue_finishEvent(AInputQueue* queue, AInputEvent* event, int handled);
1311 #endif // _ANDROID_INPUT_H