Android.Input.pas

{
  Copyright (C) 2010 The Android Open Source Project

  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
  with the License. You may obtain a copy of the License at
   http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
  on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for
  the specific language governing permissions and limitations under the License.

  Android NDK C/C++ file:
    android/input.h

  Original source code was taken from:
    %NDK_DIR%/platforms/android-9/arch-arm/usr/include/

  Pascal translation by Yuriy Kotsarenko, August 2015.
}
unit Android.Input;

{
  IMPORTANT NOTICE:

    This file is part of Android's set of stable system headers exposed by the Android NDK (Native Development Kit).

    Third-party source AND binary code relies on the definitions here to be FROZEN ON ALL UPCOMING PLATFORM RELEASES.

    - DO NOT MODIFY ENUMS (EXCEPT IF YOU ADD NEW 32-BIT VALUES)
    - DO NOT MODIFY CONSTANTS OR FUNCTIONAL MACROS
    - DO NOT CHANGE THE SIGNATURE OF FUNCTIONS IN ANY WAY
    - DO NOT CHANGE THE LAYOUT OR SIZE OF STRUCTURES
}

{
  Structures and functions to receive and process input events in native code.

  NOTE: These functions MUST be implemented by /system/lib/libui.so
}

interface

{$INCLUDE Android.Config.inc}

uses
  unixtype, Android.Looper;

{$INCLUDE Android.LibDefs.inc}

type
{
  Input events.

  Input events are opaque structures.  Use the provided accessors functions to read their properties.
}
  PPAInputEvent = ^PAInputEvent;
  PAInputEvent = ^AInputEvent;
  AInputEvent = record
  end;

{
  Input queue

  An input queue is the facility through which you retrieve input events.
}
  PAInputQueue = ^AInputQueue;
  AInputQueue = record
  end;

const
{
  Key states (may be returned by queries about the current state of a particular key code, scan code or switch).
}

  { The key state is unknown or the requested key itself is not supported. }
  AKEY_STATE_UNKNOWN = - 1;

  { The key is up. }
  AKEY_STATE_UP = 0;

  { The key is down. }
  AKEY_STATE_DOWN = 1;

  { The key is down but is a virtual key press that is being emulated by the system. }
  AKEY_STATE_VIRTUAL = 2;

{
  Meta key / modifer state.
}
  { No meta keys are pressed.}
  AMETA_NONE = 0;

  { This mask is used to check whether one of the ALT meta keys is pressed. }
  AMETA_ALT_ON = $02;

  { This mask is used to check whether the left ALT meta key is pressed. }
  AMETA_ALT_LEFT_ON = $10;

  { This mask is used to check whether the right ALT meta key is pressed. }
  AMETA_ALT_RIGHT_ON = $20;

  { This mask is used to check whether one of the SHIFT meta keys is pressed. }
  AMETA_SHIFT_ON = $01;

  { This mask is used to check whether the left SHIFT meta key is pressed. }
  AMETA_SHIFT_LEFT_ON = $40;

  { This mask is used to check whether the right SHIFT meta key is pressed. }
  AMETA_SHIFT_RIGHT_ON = $80;

  { This mask is used to check whether the SYM meta key is pressed. }
  AMETA_SYM_ON = $04;

{
  Input event types.
}
  { Indicates that the input event is a key event. }
  AINPUT_EVENT_TYPE_KEY = 1;

  { Indicates that the input event is a motion event. }
  AINPUT_EVENT_TYPE_MOTION = 2;

{
  Key event actions.
}
  { The key has been pressed down. }
  AKEY_EVENT_ACTION_DOWN = 0;

  { The key has been released. }
  AKEY_EVENT_ACTION_UP = 1;

  {
    Multiple duplicate key events have occurred in a row, or a complex string is being delivered.
    The repeat_count property of the key event contains the number of times the given key code should be executed.
  }
  AKEY_EVENT_ACTION_MULTIPLE = 2;

{
  Key event flags.
}
  { This mask is set if the device woke because of this key event. }
  AKEY_EVENT_FLAG_WOKE_HERE = $1;

  { This mask is set if the key event was generated by a software keyboard. }
  AKEY_EVENT_FLAG_SOFT_KEYBOARD = $2;

  { This mask is set if we don't want the key event to cause us to leave touch mode. }
  AKEY_EVENT_FLAG_KEEP_TOUCH_MODE = $4;

  { This mask is set if an event was known to come from a trusted part of the system.
    That is, the event is known to come from the user, and could not have been spoofed by a third party component. }
  AKEY_EVENT_FLAG_FROM_SYSTEM = $8;

  { This mask is used for compatibility, to identify enter keys that are coming from an IME whose enter key has been
    auto-labelled "next" or * "done".
    This allows TextView to dispatch these as normal enter keys for old applications, but still do the appropriate
    action when receiving them. }
  AKEY_EVENT_FLAG_EDITOR_ACTION = $10;

  { When associated with up key events, this indicates that the key press has been canceled.  Typically this is used
    with virtual touch screen keys, where the user can slide from the virtual key area on to the display: in that case,
    the application will receive a canceled up event and should not perform the action normally associated with the key.
    Note that for this to work, the application can not perform an action for a key until it receives an up or the long
    press timeout has expired.}
  AKEY_EVENT_FLAG_CANCELED = $20;

  { This key event was generated by a virtual (on-screen) hard key area.
    Typically this is an area of the touchscreen, outside of the regular display, dedicated to "hardware" buttons. }
  AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY = $40;

  { This flag is set for the first key repeat that occurs after the long press timeout. }
  AKEY_EVENT_FLAG_LONG_PRESS = $80;

  { Set when a key event has AKEY_EVENT_FLAG_CANCELED set because a long press action was executed while it was down. }
  AKEY_EVENT_FLAG_CANCELED_LONG_PRESS = $100;

  { Set for AKEY_EVENT_ACTION_UP when this event's key code is still being tracked from its initial down.
    That is, somebody requested that tracking started on the key down and a long press has not caused the tracking to
    be canceled. }
  AKEY_EVENT_FLAG_TRACKING = $200;

{
  Motion event actions.
}

{
  Bit shift for the action bits holding the pointer index as defined by AMOTION_EVENT_ACTION_POINTER_INDEX_MASK.
}
  AMOTION_EVENT_ACTION_PointerIndex_SHIFT = 8;

  { Bit mask of the parts of the action code that are the action itself. }
  AMOTION_EVENT_ACTION_MASK = $FF;

  { Bits in the action code that represent a pointer index, used with AMOTION_EVENT_ACTION_POINTER_DOWN and
    AMOTION_EVENT_ACTION_POINTER_UP.
    Shifting down by AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT provides the actual pointer index where the data for the
    pointer going up or down can be found.
  }
  AMOTION_EVENT_ACTION_PointerIndex_MASK = $FF00;

  { A pressed gesture has started, the motion contains the initial starting location. }
  AMOTION_EVENT_ACTION_DOWN = 0;

  { A pressed gesture has finished, the motion contains the final release location as well as any intermediate points
    since the last down or move event. }
  AMOTION_EVENT_ACTION_UP = 1;

  { A change has happened during a press gesture (between AMOTION_EVENT_ACTION_DOWN and AMOTION_EVENT_ACTION_UP).
    The motion contains the most recent point, as well as any intermediate points since the last down or move event. }
  AMOTION_EVENT_ACTION_MOVE = 2;

  { The current gesture has been aborted.
    You will not receive any more points in it.
    You should treat this as an up event, but not perform any action that you normally would.
  }
  AMOTION_EVENT_ACTION_CANCEL = 3;

  { A movement has happened outside of the normal bounds of the UI element.
    This does not provide a full gesture, but only the initial location of the movement/touch. }
  AMOTION_EVENT_ACTION_OUTSIDE = 4;

  { A non-primary pointer has gone down.
    The bits in AMOTION_EVENT_ACTION_POINTER_INDEX_MASK indicate which pointer changed. }
  AMOTION_EVENT_ACTION_POINTER_DOWN = 5;

  { A non-primary pointer has gone up.
    The bits in AMOTION_EVENT_ACTION_POINTER_INDEX_MASK indicate which pointer changed. }
  AMOTION_EVENT_ACTION_POINTER_UP = 6;

{
  Motion event flags.
}
  { This flag indicates that the window that received this motion event is partly or wholly obscured by another visible
    window above it. This flag is set to true even if the event did not directly pass through the obscured area.
    A security sensitive application can check this flag to identify situations in which a malicious application may
    have covered up part of its content for the purpose of misleading the user or hijacking touches. An appropriate
    response might be to drop the suspect touches or to take additional precautions to confirm the user's actual
    intent.}
  AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED = $1;

{
  Motion event edge touch flags.
}
  { No edges intersected }
  AMOTION_EVENT_EDGE_FLAG_NONE = 0;

  { Flag indicating the motion event intersected the top edge of the screen. }
  AMOTION_EVENT_EDGE_FLAG_TOP = $01;

  { Flag indicating the motion event intersected the bottom edge of the screen. }
  AMOTION_EVENT_EDGE_FLAG_BOTTOM = $02;

  { Flag indicating the motion event intersected the left edge of the screen. }
  AMOTION_EVENT_EDGE_FLAG_LEFT = $04;

  { Flag indicating the motion event intersected the right edge of the screen. }
  AMOTION_EVENT_EDGE_FLAG_RIGHT = $08;

{
  Input sources.

  Refer to the documentation on android.view.InputDevice for more details about input sources and their correct
  interpretation.
}
  AINPUT_SOURCE_CLASS_MASK = $000000FF;

  AINPUT_SOURCE_CLASS_BUTTON = $00000001;
  AINPUT_SOURCE_CLASS_POINTER = $00000002;
  AINPUT_SOURCE_CLASS_NAVIGATION = $00000004;
  AINPUT_SOURCE_CLASS_POSITION = $00000008;

  AINPUT_SOURCE_UNKNOWN = $00000000;

  AINPUT_SOURCE_KEYBOARD = $00000100 or AINPUT_SOURCE_CLASS_BUTTON;
  AINPUT_SOURCE_DPAD = $00000200 or AINPUT_SOURCE_CLASS_BUTTON;
  AINPUT_SOURCE_TOUCHSCREEN = $00001000 or AINPUT_SOURCE_CLASS_POINTER;
  AINPUT_SOURCE_MOUSE = $00002000 or AINPUT_SOURCE_CLASS_POINTER;
  AINPUT_SOURCE_TRACKBALL = $00010000 or AINPUT_SOURCE_CLASS_NAVIGATION;
  AINPUT_SOURCE_TOUCHPAD = $00100000 or AINPUT_SOURCE_CLASS_POSITION;

  AINPUT_SOURCE_ANY = $FFFFFF00;

{
  Keyboard types.

  Refer to the documentation on android.view.InputDevice for more details.
}
  AINPUT_KEYBOARD_TYPE_NONE = 0;
  AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC = 1;
  AINPUT_KEYBOARD_TYPE_ALPHABETIC = 2;

{
  Constants used to retrieve information about the range of motion for a particular coordinate of a motion event.

  Refer to the documentation on android.view.InputDevice for more details about input sources and their correct
  interpretation.
}
  AINPUT_MOTION_RANGE_X = 0;
  AINPUT_MOTION_RANGE_Y = 1;
  AINPUT_MOTION_RANGE_PRESSURE = 2;
  AINPUT_MOTION_RANGE_SIZE = 3;
  AINPUT_MOTION_RANGE_TOUCH_MAJOR = 4;
  AINPUT_MOTION_RANGE_TOUCH_MINOR = 5;
  AINPUT_MOTION_RANGE_TOOL_MAJOR = 6;
  AINPUT_MOTION_RANGE_TOOL_MINOR = 7;
  AINPUT_MOTION_RANGE_ORIENTATION = 8;

{
  Input event accessors.

  Note that most functions can only be used on input events that are of a given type.
  Calling these functions on input events of other types will yield undefined behavior.
}

{ Accessors for all input events. }

{ Get the input event type.}
function AInputEvent_getType(event: PAinputEvent): LongInt; cdecl;
  external libandroid name 'AInputEvent_getType';

{ Get the id for the device that an input event came from.

  Input events can be generated by multiple different input devices.
  Use the input device id to obtain information about the input device that was responsible for generating a
  particular event.

  An input device id of 0 indicates that the event didn't come from a physical device; other numbers are arbitrary
  and you shouldn't depend on the values.
  Use the provided input device query API to obtain information about input devices. }
function AInputEvent_getDeviceId(event: PAinputEvent): LongInt; cdecl;
  external libandroid name 'AInputEvent_getDeviceId';

{ Get the input event source. }
function AInputEvent_getSource(event: PAinputEvent): LongInt; cdecl;
  external libandroid name 'AInputEvent_getSource';

{
  Accessors for key events only.
}

{ Get the key event action.}
function AKeyEvent_getAction(key_event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AKeyEvent_getAction';

{ Get the key event flags.}
function AKeyEvent_getFlags(key_event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AKeyEvent_getFlags';

{ Get the key code of the key event.
  This is the physical key that was pressed, not the Unicode character. }
function AKeyEvent_getKeyCode(key_event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AKeyEvent_getKeyCode';

{ Get the hardware key id of this key event.
  These values are not reliable and vary from device to device. }
function AKeyEvent_getScanCode(key_event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AKeyEvent_getScanCode';

{ Get the meta key state.}
function AKeyEvent_getMetaState(key_event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AKeyEvent_getMetaState';

{ Get the repeat count of the event.
  For both key up an key down events, this is the number of times the key has repeated with the first down starting
  at 0 and counting up from there. For multiple key events, this is the number of down/up pairs that have occurred. }
function AKeyEvent_getRepeatCount(key_event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AKeyEvent_getRepeatCount';

{ Get the time of the most recent key down event, in the java.lang.System.nanoTime() time base. If this is a down
  event, this will be the same as eventTime. Note that when chording keys, this value is the down time of the most
  recently pressed key, which may not be the same physical key of this event. }
function AKeyEvent_getDownTime(key_event: PAInputEvent): Int64; cdecl;
  external libandroid name 'AKeyEvent_getDownTime';

{ Get the time this event occurred, in the java.lang.System.nanoTime() time base. }
function AKeyEvent_getEventTime(key_event: PAInputEvent): Int64; cdecl;
  external libandroid name 'AKeyEvent_getEventTime';

{
  Accessors for motion events only.
}

{ Get the combined motion event action code and pointer index. }
function AMotionEvent_getAction(motion_event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AMotionEvent_getAction';

{ Get the motion event flags.}
function AMotionEvent_getFlags(motion_event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AMotionEvent_getFlags';

{ Get the state of any meta / modifier keys that were in effect when the event was generated. }
function AMotionEvent_getMetaState(motion_event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AMotionEvent_getMetaState';

{ Get a bitfield indicating which edges, if any, were touched by this motion event.
  For touch events, clients can use this to determine if the user's finger was touching the edge of the display. }
function AMotionEvent_getEdgeFlags(motion_event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AMotionEvent_getEdgeFlags';

{ Get the time when the user originally pressed down to start a stream of position events,
  in the java.lang.System.nanoTime() time base. }
function AMotionEvent_getDownTime(motion_event: PAInputEvent): Int64; cdecl;
  external libandroid name 'AMotionEvent_getDownTime';

{ Get the time when this specific event was generated, in the java.lang.System.nanoTime() time base.}
function AMotionEvent_getEventTime(motion_event: PAInputEvent): Int64; cdecl;
  external libandroid name 'AMotionEvent_getEventTime';

{ Get the X coordinate offset.
  For touch events on the screen, this is the delta that was added to the raw screen coordinates to adjust for the
  absolute position of the containing windows and views. }
function AMotionEvent_getXOffset(motion_event: PAInputEvent): Single; cdecl;
  external libandroid name 'AMotionEvent_getXOffset';

{ Get the precision of the Y coordinates being reported.
  For touch events on the screen, this is the delta that was added to the raw screen coordinates to adjust for the
  absolute position of the containing windows and views. }
function AMotionEvent_getYOffset(motion_event: PAInputEvent): Single; cdecl;
  external libandroid name 'AMotionEvent_getYOffset';

{ Get the precision of the X coordinates being reported.
  You can multiply this number with an X coordinate sample to find the actual hardware value of the X coordinate. }
function AMotionEvent_getXPrecision(motion_event: PAInputEvent): Single; cdecl;
  external libandroid name 'AMotionEvent_getXPrecision';

{ Get the precision of the Y coordinates being reported.
  You can multiply this number with a Y coordinate sample to find the actual hardware value of the Y coordinate. }
function AMotionEvent_getYPrecision(motion_event: PAInputEvent): Single; cdecl;
  external libandroid name 'AMotionEvent_getYPrecision';

{ Get the number of pointers of data contained in this event.
  Always >= 1. }
function AMotionEvent_getPointerCount(motion_event: PAInputEvent): size_t; cdecl;
  external libandroid name 'AMotionEvent_getPointerCount';

{ Get the pointer identifier associated with a particular pointer data index is this event. The identifier tells you
  the actual pointer number associated with the data, accounting for individual pointers going up and down since the
  start of the current gesture. }
function AMotionEvent_getPointerId(motion_event: PAInputEvent; pointer_index: size_t): LongInt; cdecl;
  external libandroid name 'AMotionEvent_getPointerId';

{ Get the original raw X coordinate of this event.
  For touch events on the screen, this is the original location of the event on the screen, before it had been adjusted
  for the containing window and views. }
function AMotionEvent_getRawX(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getRawX';

{ Get the original raw X coordinate of this event.
  For touch events on the screen, this is the original location of the event on the screen, before it had been adjusted
  for the containing window and views. }
function AMotionEvent_getRawY(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getRawY';

{ Get the current X coordinate of this event for the given pointer index.
  Whole numbers are pixels; the value may have a fraction for input devices that are sub-pixel precise. }
function AMotionEvent_getX(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getX';

{ Get the current Y coordinate of this event for the given pointer index.
  Whole numbers are pixels; the value may have a fraction for input devices that are sub-pixel precise. }
function AMotionEvent_getY(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getY';

{ Get the current pressure of this event for the given pointer index.
  The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure), although values higher than 1 may
  be generated depending on the calibration of the input device. }
function AMotionEvent_getPressure(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getPressure';

{ Get the current scaled value of the approximate size for the given pointer index.
  This represents some approximation of the area of the screen being pressed; the actual value in pixels corresponding
  to the touch is normalized with the device specific range of values and scaled to a value between 0 and 1. The value
  of size can be used to determine fat touch events. }
function AMotionEvent_getSize(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getSize';

{ Get the current length of the major axis of an ellipse that describes the touch area at the point of contact for the
  given pointer index. }
function AMotionEvent_getTouchMajor(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getTouchMajor';

{ Get the current length of the minor axis of an ellipse that describes the touch area at the point of contact for the
  given pointer index. }
function AMotionEvent_getTouchMinor(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getTouchMinor';

{ Get the current length of the major axis of an ellipse that describes the size of the approaching tool for the given
  pointer index.
  The tool area represents the estimated size of the finger or pen that is touching the device independent of its
  actual touch area at the point of contact. }
function AMotionEvent_getToolMajor(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getToolMajor';

{ Get the current length of the minor axis of an ellipse that describes the size of the approaching tool for the given
  pointer index.
  The tool area represents the estimated size of the finger or pen that is touching the device independent of its
  actual touch area at the point of contact. }
function AMotionEvent_getToolMinor(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getToolMinor';

{ Get the current orientation of the touch area and tool area in radians clockwise from vertical for the given pointer
  index.
  An angle of 0 degrees indicates that the major axis of contact is oriented upwards, is perfectly circular or is of
  unknown orientation. A positive angle indicates that the major axis of contact is oriented to the right. A negative
  angle indicates that the major axis of contact is oriented to the left.
  The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians (finger pointing fully right). }
function AMotionEvent_getOrientation(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getOrientation';

{ Get the number of historical points in this event. These are movements that have occurred between this event and the
  previous event. This only applies to AMOTION_EVENT_ACTION_MOVE events -- all other actions will have a size of 0.
  Historical samples are indexed from oldest to newest. }
function AMotionEvent_getHistorySize(motion_event: PAInputEvent): size_t; cdecl;
  external libandroid name 'AMotionEvent_getHistorySize';

{ Get the time that a historical movement occurred between this event and the previous event,
  in the java.lang.System.nanoTime() time base. }
function AMotionEvent_getHistoricalEventTime(motion_event: PAInputEvent; history_index: size_t): Int64; cdecl;
  external libandroid name 'AMotionEvent_getHistoricalEventTime';

{ Get the historical raw X coordinate of this event for the given pointer index that occurred between this event and
  the previous motion event.
  For touch events on the screen, this is the original location of the event on the screen, before it had been adjusted
  for the containing window and views.
  Whole numbers are pixels; the value may have a fraction for input devices that are sub-pixel precise. }

// Note: this method is not exported in "libandroid.so".

// function AMotionEvent_getHistoricalRawX(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
//   external libandroid name 'AMotionEvent_getHistoricalRawX';

{ Get the historical raw Y coordinate of this event for the given pointer index that occurred between this event and
  the previous motion event.
  For touch events on the screen, this is the original location of the event on the screen, before it had been adjusted
  for the containing window and views.
  Whole numbers are pixels; the value may have a fraction for input devices that are sub-pixel precise. }

// Note: this method is not exported in "libandroid.so".

// function AMotionEvent_getHistoricalRawY(motion_event: PAInputEvent; pointer_index: size_t): Single; cdecl;
//   external libandroid name 'AMotionEvent_getHistoricalRawY';

{ Get the historical X coordinate of this event for the given pointer index that occurred between this event and the
  previous motion event.
  Whole numbers are pixels; the value may have a fraction for input devices that are sub-pixel precise. }
function AMotionEvent_getHistoricalX(motion_event: PAInputEvent; pointer_index, history_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getHistoricalX';

{ Get the historical Y coordinate of this event for the given pointer index that occurred between this event and the
  previous motion event.
  Whole numbers are pixels; the value may have a fraction for input devices that are sub-pixel precise. }
function AMotionEvent_getHistoricalY(motion_event: PAInputEvent; pointer_index, history_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getHistoricalY';

{ Get the historical pressure of this event for the given pointer index that occurred between this event and the
  previous motion event.
  The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure), although values higher than 1 may
  be generated depending on the calibration of the input device. }
function AMotionEvent_getHistoricalPressure(motion_event: PAInputEvent; pointer_index,
  history_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getHistoricalPressure';

{ Get the current scaled value of the approximate size for the given pointer index that occurred between this event and
  the previous motion event.
  This represents some approximation of the area of the screen being pressed; the actual value in pixels corresponding
  to the touch is normalized with the device specific range of values and scaled to a value between 0 and 1. The value
  of size can be used to determine fat touch events. }
function AMotionEvent_getHistoricalSize(motion_event: PAInputEvent; pointer_index,
  history_index: size_t): Single; cdecl;
  external libandroid name 'AMotionEvent_getHistoricalSize';

{ Get the historical length of the major axis of an ellipse that describes the touch area at the point of contact for
  the given pointer index that occurred between this event and the previous motion event. }

// Note: this method is not exported in "libandroid.so".

// function AMotionEvent_getHistoricalTouchMajor(motion_event: PAInputEvent; pointer_index,
//   history_index: size_t): Single; cdecl;
//   external libandroid name 'AMotionEvent_getHistoricalTouchMajor';

{ Get the historical length of the minor axis of an ellipse that describes the touch area at the point of contact for
  the given pointer index that occurred between this event and the previous motion event. }

// Note: this method is not exported in "libandroid.so".

// function AMotionEvent_getHistoricalTouchMinor(motion_event: PAInputEvent; pointer_index,
//   history_index: size_t): Single; cdecl;
//   external libandroid name 'AMotionEvent_getHistoricalTouchMinor';

{ Get the historical length of the major axis of an ellipse that describes the size of the approaching tool for the
  given pointer index that occurred between this event and the previous motion event.
  The tool area represents the estimated size of the finger or pen that is touching the device independent of its
  actual touch area at the point of contact. }

// Note: this method is not exported in "libandroid.so".

// function AMotionEvent_getHistoricalToolMajor(motion_event: PAInputEvent; pointer_index,
//   history_index: size_t): Single; cdecl;
//   external libandroid name 'AMotionEvent_getHistoricalToolMajor';

{ Get the historical length of the minor axis of an ellipse that describes the size of the approaching tool for the
  given pointer index that occurred between this event and the previous motion event.
  The tool area represents the estimated size of the finger or pen that is touching the device independent of its
  actual touch area at the point of contact. }

// Note: this method is not exported in "libandroid.so".

// function AMotionEvent_getHistoricalToolMinor(motion_event: PAInputEvent; pointer_index,
//   history_index: size_t): Single; cdecl;
//   external libandroid name 'AMotionEvent_getHistoricalToolMinor';

{ Get the historical orientation of the touch area and tool area in radians clockwise from vertical for the given
  pointer index that occurred between this event and the previous motion event.
  An angle of 0 degrees indicates that the major axis of contact is oriented upwards, is perfectly circular or is of
  unknown orientation. A positive angle indicates that the major axis of contact is oriented to the right. A negative
  angle indicates that the major axis of contact is oriented to the left.
  The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians (finger pointing fully right). }

// Note: this method is not exported in "libandroid.so".

// function AMotionEvent_getHistoricalOrientation(motion_event: PAInputEvent; pointer_index,
//   history_index: size_t): Single; cdecl;
//   external libandroid name 'AMotionEvent_getHistoricalOrientation';

{
  Add this input queue to a looper for processing.
  See ALooper_addFd() for information on the ident, callback, and data params.
}
procedure AInputQueue_attachLooper(queue: PAInputQueue; looper: PALooper; ident: LongInt;
  callback: ALooper_callbackFunc; data: Pointer); cdecl;
  external libandroid name 'AInputQueue_attachLooper';

{
  Remove the input queue from the looper it is currently attached to.
}
procedure AInputQueue_detachLooper(queue: PAInputQueue); cdecl;
  external libandroid name 'AInputQueue_detachLooper';

{
  Returns true if there are one or more events available in the input queue.
  Returns 1 if the queue has events; 0 if it does not have events; and a negative value if there is an error.
}
function AInputQueue_hasEvents(queue: PAInputQueue): LongInt; cdecl;
  external libandroid name 'AInputQueue_hasEvents';

{
  Returns the next available event from the queue. Returns a negative value if no events are available or an error has
  occurred.
}
function AInputQueue_getEvent(queue: PAInputQueue; outEvent: PPAInputEvent): LongInt; cdecl;
  external libandroid name 'AInputQueue_getEvent';

{
  Sends the key for standard pre-dispatching -- that is, possibly deliver it to the current IME to be consumed before
  the app. Returns 0 if it was not pre-dispatched, meaning you can process it right now. If non-zero is returned, you
  must abandon the current event processing and allow the event to appear again in the event queue (if it does not get
  consumed during pre-dispatching).
}
function AInputQueue_preDispatchEvent(queue: PAInputQueue; event: PAInputEvent): LongInt; cdecl;
  external libandroid name 'AInputQueue_preDispatchEvent';

{
  Report that dispatching has finished with the given event.
  This must be called after receiving an event with AInputQueue_get_event().
}
procedure AInputQueue_finishEvent(queue: PAInputQueue; event: PAinputEvent; handled: LongInt); cdecl;
  external libandroid name 'AInputQueue_finishEvent';

implementation

end.