/*
     File:       CarbonEventsCore.h
 
     Contains:   Carbon Event Manager
 
     Version:    QuickTime 7.1
 
     Copyright:  © 2006 © 1999-2001 by Apple Computer, Inc., all rights reserved.
 
     Bugs?:      For bug reports, consult the following page on
                 the World Wide Web:
 
                     http://developer.apple.com/bugreporter/
 
*/
#ifndef __CARBONEVENTSCORE__
#define __CARBONEVENTSCORE__

#ifndef __CFSTRING__
#include <CFString.h>
#endif

#ifndef __AEREGISTRY__
#include <AERegistry.h>
#endif

#ifndef __AEDATAMODEL__
#include <AEDataModel.h>
#endif



#if PRAGMA_ONCE
#pragma once
#endif

#ifdef __cplusplus
extern "C" {
#endif

#if PRAGMA_IMPORT
#pragma import on
#endif

#if PRAGMA_STRUCT_ALIGN
    #pragma options align=mac68k
#elif PRAGMA_STRUCT_PACKPUSH
    #pragma pack(push, 2)
#elif PRAGMA_STRUCT_PACK
    #pragma pack(2)
#endif

/*======================================================================================*/
/*  The core data structure of the Carbon Event system                                  */
/*======================================================================================*/
typedef struct OpaqueEventRef*          EventRef;
/*======================================================================================*/
/*  EVENT COMMON                                                                        */
/*======================================================================================*/


/*
 *  Discussion:
 *    The following are all errors which can be returned from the
 *    routines contained in this file.
 */
enum {

  /*
   * This is returned from PostEventToQueue if the event in question is
   * already in the queue you are posting it to (or any other queue).
   */
  eventAlreadyPostedErr         = -9860,

  /*
   * You are attemtping to modify a target that is currently in use,
   * such as when dispatching.
   */
  eventTargetBusyErr            = -9861,

  /*
   * This is obsolete and will be removed.
   */
  eventClassInvalidErr          = -9862,

  /*
   * This is obsolete and will be removed.
   */
  eventClassIncorrectErr        = -9864,

  /*
   * Returned from InstallEventHandler if the handler proc you pass is
   * already installed for a given event type you are trying to
   * register.
   */
  eventHandlerAlreadyInstalledErr = -9866,

  /*
   * A generic error.
   */
  eventInternalErr              = -9868,

  /*
   * This is obsolete and will be removed.
   */
  eventKindIncorrectErr         = -9869,

  /*
   * The piece of data you are requesting from an event is not present.
   */
  eventParameterNotFoundErr     = -9870,

  /*
   * This is what you should return from an event handler when your
   * handler has received an event it doesn't currently want to (or
   * isn't able to) handle. If you handle an event, you should return
   * noErr from your event handler. Any return value other than
   * eventNotHandledErr will cause event handling to stop; the event
   * will not be sent to any other event handler, and the return value
   * will be provided to the original caller of SendEventToTarget.
   */
  eventNotHandledErr            = -9874,

  /*
   * The event loop has timed out. This can be returned from calls to
   * ReceiveNextEvent or RunCurrentEventLoop.
   */
  eventLoopTimedOutErr          = -9875,

  /*
   * The event loop was quit, probably by a call to QuitEventLoop. This
   * can be returned from ReceiveNextEvent or RunCurrentEventLoop.
   */
  eventLoopQuitErr              = -9876,

  /*
   * Returned from RemoveEventFromQueue when trying to remove an event
   * that's not in any queue.
   */
  eventNotInQueueErr            = -9877,
  eventHotKeyExistsErr          = -9878,
  eventHotKeyInvalidErr         = -9879
};

/*======================================================================================*/
/*  EVENT CORE                                                                          */
/*======================================================================================*/
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Event Flags, options                                                              */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

/*
 *  EventPriority
 *  
 *  Discussion:
 *    These values define the relative priority of an event, and are
 *    used when posting events with PostEventToQueue. In general events
 *    are pulled from the queue in order of first posted to last
 *    posted. These priorities are a way to alter that when posting
 *    events. You can post a standard priority event and then a high
 *    priority event and the high priority event will be pulled from
 *    the queue first.
 */
typedef SInt16 EventPriority;
enum {

  /*
   * Lowest priority. Currently only window update events are posted at
   * this priority.
   */
  kEventPriorityLow             = 0,

  /*
   * Normal priority of events. Most events are standard priority.
   */
  kEventPriorityStandard        = 1,

  /*
   * Highest priority.
   */
  kEventPriorityHigh            = 2
};

enum {
  kEventLeaveInQueue            = false,
  kEventRemoveFromQueue         = true
};

/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/* ₯ Event Times                                                                        */
/*                                                                                      */
/* EventTime is in seconds since boot. Use the constants to make life easy.             */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
typedef double                          EventTime;
typedef EventTime                       EventTimeout;
typedef EventTime                       EventTimerInterval;
#define kEventDurationSecond            ((EventTime)1.0)
#define kEventDurationMillisecond       ((EventTime)(kEventDurationSecond/1000))
#define kEventDurationMicrosecond       ((EventTime)(kEventDurationSecond/1000000))
#define kEventDurationNanosecond        ((EventTime)(kEventDurationSecond/1000000000))
#define kEventDurationMinute            ((EventTime)(kEventDurationSecond*60))
#define kEventDurationHour              ((EventTime)(kEventDurationMinute*60))
#define kEventDurationDay               ((EventTime)(kEventDurationHour*24))
#define kEventDurationNoWait            ((EventTime)0.0)
#define kEventDurationForever           ((EventTime)(-1.0))

/* Helpful doodads to convert to and from ticks and event times*/
#ifdef __cplusplus
    inline EventTime TicksToEventTime( UInt32 t ) { return ( (t) / 60.0 ); }
    inline UInt32 EventTimeToTicks( EventTime t ) { return (UInt32)( ((t) * 60) + 0.5 ); }
#else
    #define TicksToEventTime( t )   ((EventTime)( (t) / 60.0 ))
    #define EventTimeToTicks( t )   ((UInt32)( ((t) * 60) + 0.5 ))
#endif  /* defined(__cplusplus) */


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/* EventTypeSpec structure                                                              */
/*                                                                                      */
/* This structure is used in many routines to pass a list of event types to a function. */
/* You typically would declare a const array of these types to pass in.                 */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

/*
 *  EventTypeSpec
 *  
 *  Discussion:
 *    This structure is used to specify an event. Typically, a static
 *    array of EventTypeSpecs are passed into functions such as
 *    InstallEventHandler, as well as routines such as
 *    FlushEventsMatchingListFromQueue.
 */
struct EventTypeSpec {
  UInt32              eventClass;
  UInt32              eventKind;
};
typedef struct EventTypeSpec            EventTypeSpec;
/*A helpful macro for dealing with EventTypeSpecs */
#define GetEventTypeCount( t )  (sizeof( (t) ) / sizeof( EventTypeSpec ))

typedef OSType                          EventParamName;
typedef OSType                          EventParamType;
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ EventLoop                                                                         */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

/*
 *  EventLoopRef
 *  
 *  Discussion:
 *    An EventLoopRef represents an 'event loop', which is the
 *    conceptual entity that you 'run' to fetch events from hardware
 *    and other sources and also fires timers that might be installed
 *    with InstallEventLoopTimer. The term 'run' is a bit of a
 *    misnomer, as the event loop's goal is to stay as blocked as
 *    possible to minimize CPU usage for the current application. The
 *    event loop is run implicitly thru APIs like ReceiveNextEvent,
 *    RunApplicationEventLoop, or even WaitNextEvent. It can also be
 *    run explicitly thru a call to RunCurrentEventLoop. Each
 *    preemptive thread can have an event loop. Cooperative threads
 *    share the main thread's event loop.
 */
typedef struct OpaqueEventLoopRef*      EventLoopRef;
/*
 *  GetCurrentEventLoop()
 *  
 *  Discussion:
 *    Returns the current event loop for the current thread. If the
 *    current thread is a cooperative thread, the main event loop is
 *    returned.
 *  
 *  Result:
 *    An event loop reference.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( EventLoopRef )
GetCurrentEventLoop(void);


/*
 *  GetMainEventLoop()
 *  
 *  Discussion:
 *    Returns the event loop object for the main application thread.
 *  
 *  Result:
 *    An event loop reference.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( EventLoopRef )
GetMainEventLoop(void);



/*
 *  RunCurrentEventLoop()
 *  
 *  Discussion:
 *    This routine 'runs' the event loop, returning only if aborted or
 *    the timeout specified is reached. The event loop is mostly
 *    blocked while in this function, occasionally waking up to fire
 *    timers or pick up events. The typical use of this function is to
 *    cause the current thread to wait for some operation to complete,
 *    most likely on another thread of execution.
 *  
 *  Parameters:
 *    
 *    inTimeout:
 *      The time to wait until returning (can be kEventDurationForever).
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
RunCurrentEventLoop(EventTimeout inTimeout);


/*
 *  QuitEventLoop()
 *  
 *  Discussion:
 *    Causes a specific event loop to terminate. Usage of this is
 *    similar to WakeUpProcess, in that it causes the eventloop
 *    specified to return immediately (as opposed to timing out).
 *    Typically this call is used in conjunction with
 *    RunCurrentEventLoop.
 *  
 *  Parameters:
 *    
 *    inEventLoop:
 *      The event loop to terminate.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
QuitEventLoop(EventLoopRef inEventLoop);


/*
 *  GetCFRunLoopFromEventLoop()
 *  
 *  Discussion:
 *    Returns the corresponding CFRunLoopRef for the given EventLoop.
 *    This is not necessarily a one-to-one mapping, hence the need for
 *    this function. In Carbon, all cooperative threads use the same
 *    run loop under the covers, so using CFRunLoopGetCurrent might
 *    yield the wrong result. In general, you would only need to use
 *    this function if you wished to add your own sources to the run
 *    loop. If you don't know what I'm talking about, then you probably
 *    don't need to use this.
 *  
 *  Parameters:
 *    
 *    inEventLoop:
 *      The event loop to get the CFRunLoop for.
 *  
 *  Result:
 *    The CFRunLoopRef for inEventLoop.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        not available in CarbonLib 1.x, is available on Mac OS X version 10.1 and later
 *    Mac OS X:         in version 10.1 and later
 */
EXTERN_API_C( CFTypeRef )
GetCFRunLoopFromEventLoop(EventLoopRef inEventLoop);


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Low-level event fetching                                                          */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*
 *  ReceiveNextEvent()
 *  
 *  Discussion:
 *    This routine tries to fetch the next event of a specified type.
 *    If no events in the event queue match, this routine will run the
 *    current event loop until an event that matches arrives, or the
 *    timeout expires. Except for timers firing, your application is
 *    blocked waiting for events to arrive when inside this function.
 *  
 *  Parameters:
 *    
 *    inNumTypes:
 *      The number of event types we are waiting for (0 if any event
 *      should cause this routine to return).
 *    
 *    inList:
 *      The list of event types we are waiting for (pass NULL if any
 *      event should cause this routine to return).
 *    
 *    inTimeout:
 *      The time to wait (passing kEventDurationForever is preferred).
 *    
 *    inPullEvent:
 *      Pass true for this parameter to actually remove the next
 *      matching event from the queue.
 *    
 *    outEvent:
 *      The next event that matches the list passed in. If inPullEvent
 *      is true, the event is owned by you, and you will need to
 *      release it when done.
 *  
 *  Result:
 *    A result indicating whether an event was received, the timeout
 *    expired, or the current event loop was quit.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
ReceiveNextEvent(
  UInt32                 inNumTypes,
  const EventTypeSpec *  inList,
  EventTimeout           inTimeout,
  Boolean                inPullEvent,
  EventRef *             outEvent);


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Core event lifetime APIs                                                          */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
typedef UInt32 EventAttributes;
enum {
  kEventAttributeNone           = 0,
  kEventAttributeUserEvent      = (1 << 0)
};

/*
 *  [Mac]CreateEvent()
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
#if TARGET_OS_MAC
    #define MacCreateEvent CreateEvent
#endif
EXTERN_API( OSStatus )
MacCreateEvent(
  CFAllocatorRef    inAllocator,       /* can be NULL */
  UInt32            inClassID,
  UInt32            kind,
  EventTime         when,
  EventAttributes   flags,
  EventRef *        outEvent);


/*
 *  CopyEvent()
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( EventRef )
CopyEvent(EventRef inOther);


/*
 *  RetainEvent()
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( EventRef )
RetainEvent(EventRef inEvent);


/*
 *  GetEventRetainCount()
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( UInt32 )
GetEventRetainCount(EventRef inEvent);


/*
 *  ReleaseEvent()
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( void )
ReleaseEvent(EventRef inEvent);


/*
 *  SetEventParameter()
 *  
 *  Discussion:
 *    Sets a piece of data for the given event.
 *  
 *  Parameters:
 *    
 *    inEvent:
 *      The event to set the data for.
 *    
 *    inName:
 *      The symbolic name of the parameter.
 *    
 *    inType:
 *      The symbolic type of the parameter.
 *    
 *    inSize:
 *      The size of the parameter data.
 *    
 *    inDataPtr:
 *      The pointer to the parameter data.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
SetEventParameter(
  EventRef         inEvent,
  EventParamName   inName,
  EventParamType   inType,
  UInt32           inSize,
  const void *     inDataPtr);



/*
 *  GetEventParameter()
 *  
 *  Discussion:
 *    Gets a piece of data from the given event, if it exists.
 *  
 *  Parameters:
 *    
 *    inEvent:
 *      The event to get the parameter from.
 *    
 *    inName:
 *      The symbolic name of the parameter.
 *    
 *    inDesiredType:
 *      The desired type of the parameter. At present we do not support
 *      coercion, so this parameter must be the actual type of data
 *      stored in the event, or an error will be returned.
 *    
 *    outActualType:
 *      The actual type of the parameter, can be NULL if you are not
 *      interested in receiving this information.
 *    
 *    inBufferSize:
 *      The size of the output buffer specified by ioBuffer.
 *    
 *    outActualSize:
 *      The actual size of the data, or NULL if you don't want this
 *      information.
 *    
 *    outData:
 *      The pointer to the buffer which will receive the parameter data.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
GetEventParameter(
  EventRef          inEvent,
  EventParamName    inName,
  EventParamType    inDesiredType,
  EventParamType *  outActualType,       /* can be NULL */
  UInt32            inBufferSize,
  UInt32 *          outActualSize,       /* can be NULL */
  void *            outData);



/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Getters for 'base-class' event info                                               */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*
 *  GetEventClass()
 *  
 *  Discussion:
 *    Returns the class of the given event, such as mouse, keyboard,
 *    etc.
 *  
 *  Parameters:
 *    
 *    inEvent:
 *      The event in question.
 *  
 *  Result:
 *    The class ID of the event.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( UInt32 )
GetEventClass(EventRef inEvent);


/*
 *  GetEventKind()
 *  
 *  Discussion:
 *    Returns the kind of the given event (mousedown, etc.). Event
 *    kinds overlap between event classes, e.g. kEventMouseDown and
 *    kEventAppActivated have the same value (1). The combination of
 *    class and kind is what determines an event signature.
 *  
 *  Parameters:
 *    
 *    inEvent:
 *      The event in question.
 *  
 *  Result:
 *    The kind of the event.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( UInt32 )
GetEventKind(EventRef inEvent);


/*
 *  GetEventTime()
 *  
 *  Discussion:
 *    Returns the time the event specified occurred, specified in
 *    EventTime, which is a floating point number representing seconds
 *    since the last system startup.
 *  
 *  Parameters:
 *    
 *    inEvent:
 *      The event in question.
 *  
 *  Result:
 *    The time the event occurred.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( EventTime )
GetEventTime(EventRef inEvent);


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Setters for 'base-class' event info                                               */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

/*
 *  SetEventTime()
 *  
 *  Discussion:
 *    This routine allows you to set the time of a given event, if you
 *    so desire. In general, you would never use this routine, except
 *    for those special cases where you reuse an event from time to
 *    time instead of creating a new event each time.
 *  
 *  Parameters:
 *    
 *    inEvent:
 *      The event in question.
 *    
 *    inTime:
 *      The new time.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
SetEventTime(
  EventRef    inEvent,
  EventTime   inTime);


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Event Queue routines (posting, finding, flushing)                                 */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

typedef struct OpaqueEventQueueRef*     EventQueueRef;
/*
 *  GetCurrentEventQueue()
 *  
 *  Discussion:
 *    Returns the current event queue for the current thread. If the
 *    current thread is a cooperative thread, the main event queue is
 *    returned.
 *  
 *  Result:
 *    An event queue reference.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( EventQueueRef )
GetCurrentEventQueue(void);


/*
 *  GetMainEventQueue()
 *  
 *  Discussion:
 *    Returns the event queue object for the main application thread.
 *  
 *  Result:
 *    An event queue reference.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( EventQueueRef )
GetMainEventQueue(void);



/*
 *  EventComparatorProcPtr
 *  
 *  Discussion:
 *    Type of a callback function used by queue searches.
 *  
 *  Parameters:
 *    
 *    inEvent:
 *      The event to compare.
 *    
 *    inCompareData:
 *      The data used to compare the event.
 *  
 *  Result:
 *    A boolean value indicating whether the event matches (true) or
 *    not (false).
 */
typedef CALLBACK_API( Boolean , EventComparatorProcPtr )(EventRef inEvent, void *inCompareData);
typedef STACK_UPP_TYPE(EventComparatorProcPtr)                  EventComparatorUPP;
/*
 *  NewEventComparatorUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( EventComparatorUPP )
NewEventComparatorUPP(EventComparatorProcPtr userRoutine);
#if !OPAQUE_UPP_TYPES
  enum { uppEventComparatorProcInfo = 0x000003D0 };  /* pascal 1_byte Func(4_bytes, 4_bytes) */
  #ifdef __cplusplus
    inline DEFINE_API_C(EventComparatorUPP) NewEventComparatorUPP(EventComparatorProcPtr userRoutine) { return (EventComparatorUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), uppEventComparatorProcInfo, GetCurrentArchitecture()); }
  #else
    #define NewEventComparatorUPP(userRoutine) (EventComparatorUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), uppEventComparatorProcInfo, GetCurrentArchitecture())
  #endif
#endif

/*
 *  DisposeEventComparatorUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( void )
DisposeEventComparatorUPP(EventComparatorUPP userUPP);
#if !OPAQUE_UPP_TYPES
  #ifdef __cplusplus
      inline DEFINE_API_C(void) DisposeEventComparatorUPP(EventComparatorUPP userUPP) { DisposeRoutineDescriptor((UniversalProcPtr)userUPP); }
  #else
      #define DisposeEventComparatorUPP(userUPP) DisposeRoutineDescriptor(userUPP)
  #endif
#endif

/*
 *  InvokeEventComparatorUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( Boolean )
InvokeEventComparatorUPP(
  EventRef            inEvent,
  void *              inCompareData,
  EventComparatorUPP  userUPP);
#if !OPAQUE_UPP_TYPES
  #ifdef __cplusplus
      inline DEFINE_API_C(Boolean) InvokeEventComparatorUPP(EventRef inEvent, void * inCompareData, EventComparatorUPP userUPP) { return (Boolean)CALL_TWO_PARAMETER_UPP(userUPP, uppEventComparatorProcInfo, inEvent, inCompareData); }
  #else
    #define InvokeEventComparatorUPP(inEvent, inCompareData, userUPP) (Boolean)CALL_TWO_PARAMETER_UPP((userUPP), uppEventComparatorProcInfo, (inEvent), (inCompareData))
  #endif
#endif

#if CALL_NOT_IN_CARBON || OLDROUTINENAMES
    /* support for pre-Carbon UPP routines: New...Proc and Call...Proc */
    #define NewEventComparatorProc(userRoutine)                 NewEventComparatorUPP(userRoutine)
    #define CallEventComparatorProc(userRoutine, inEvent, inCompareData) InvokeEventComparatorUPP(inEvent, inCompareData, userRoutine)
#endif /* CALL_NOT_IN_CARBON */

/*
 *  PostEventToQueue()
 *  
 *  Discussion:
 *    Posts an event to the queue specified. This automatically wakes
 *    up the event loop of the thread the queue belongs to. After
 *    posting the event, you should release the event. The event queue
 *    retains it.
 *  
 *  Parameters:
 *    
 *    inQueue:
 *      The event queue to post the event onto.
 *    
 *    inEvent:
 *      The event to post.
 *    
 *    inPriority:
 *      The priority of the event.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
PostEventToQueue(
  EventQueueRef   inQueue,
  EventRef        inEvent,
  EventPriority   inPriority);


/*
 *  FlushEventsMatchingListFromQueue()
 *  
 *  Discussion:
 *    Flushes events matching a specified list of classes and kinds
 *    from an event queue.
 *  
 *  Parameters:
 *    
 *    inQueue:
 *      The event queue to flush events from.
 *    
 *    inNumTypes:
 *      The number of event kinds to flush.
 *    
 *    inList:
 *      The list of event classes and kinds to flush from the queue.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
FlushEventsMatchingListFromQueue(
  EventQueueRef          inQueue,
  UInt32                 inNumTypes,
  const EventTypeSpec *  inList);


/*
 *  FlushSpecificEventsFromQueue()
 *  
 *  Discussion:
 *    Flushes events that match a comparator function.
 *  
 *  Parameters:
 *    
 *    inQueue:
 *      The event queue to flush events from.
 *    
 *    inComparator:
 *      The comparison function to invoke for each event in the queue.
 *    
 *    inCompareData:
 *      The data you wish to pass to your comparison function.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
FlushSpecificEventsFromQueue(
  EventQueueRef        inQueue,
  EventComparatorUPP   inComparator,
  void *               inCompareData);


/*
 *  FlushEventQueue()
 *  
 *  Discussion:
 *    Flushes all events from an event queue.
 *  
 *  Parameters:
 *    
 *    inQueue:
 *      The event queue to flush.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
FlushEventQueue(EventQueueRef inQueue);


/*
 *  FindSpecificEventInQueue()
 *  
 *  Discussion:
 *    Returns the first event that matches a comparator function, or
 *    NULL if no events match.
 *  
 *  Parameters:
 *    
 *    inQueue:
 *      The event queue to search.
 *    
 *    inComparator:
 *      The comparison function to invoke for each event in the queue.
 *    
 *    inCompareData:
 *      The data you wish to pass to your comparison function.
 *  
 *  Result:
 *    An event reference. The event is still in the queue when
 *    FindSpecificEventInQueue returns; you can remove it from the
 *    queue with RemoveEventFromQueue. The returned event does not need
 *    to be released by the caller.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( EventRef )
FindSpecificEventInQueue(
  EventQueueRef        inQueue,
  EventComparatorUPP   inComparator,
  void *               inCompareData);


/*
 *  GetNumEventsInQueue()
 *  
 *  Discussion:
 *    Returns the number of events in an event queue.
 *  
 *  Parameters:
 *    
 *    inQueue:
 *      The event queue to query.
 *  
 *  Result:
 *    The number of items in the queue.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( UInt32 )
GetNumEventsInQueue(EventQueueRef inQueue);


/*
 *  RemoveEventFromQueue()
 *  
 *  Discussion:
 *    Removes the given event from the queue which it was posted. When
 *    you call this function, the event ownership is transferred to
 *    you, the caller, at no charge. You must release the event when
 *    you are through with it.
 *  
 *  Parameters:
 *    
 *    inQueue:
 *      The queue to remove the event from.
 *    
 *    inEvent:
 *      The event to remove.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
RemoveEventFromQueue(
  EventQueueRef   inQueue,
  EventRef        inEvent);


/*
 *  IsEventInQueue()
 *  
 *  Discussion:
 *    Returns true if the specified event is posted to a queue.
 *  
 *  Parameters:
 *    
 *    inQueue:
 *      The queue to check.
 *    
 *    inEvent:
 *      The event in question.
 *  
 *  Result:
 *    A boolean value.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( Boolean )
IsEventInQueue(
  EventQueueRef   inQueue,
  EventRef        inEvent);


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  Queue-synchronized event state                                                      */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*
 *  GetCurrentEvent()
 *  
 *  Summary:
 *    Returns the user input event currently being handled.
 *  
 *  Discussion:
 *    When an event with kEventAttributeUserEvent is dispatched by the
 *    event dispatcher target, it is recorded internally by the Event
 *    Manager. At any time during the handling of that event,
 *    GetCurrentEvent may be used to retrieve the original EventRef.
 *  
 *  Result:
 *    The user input (mouse or keyboard) event currently being handled.
 *    May be NULL if no event is currently being handled, or if the
 *    current event was not a user input event. The returned event is
 *    not retained, and its lifetime should be considered to be no
 *    longer than the current function; if you need to keep the event
 *    alive past that time, you should retain it.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        not available in CarbonLib 1.x, is available on Mac OS X version 10.2 and later
 *    Mac OS X:         in version 10.2 and later
 */
EXTERN_API_C( EventRef )
GetCurrentEvent(void);


/*
 *  GetCurrentEventButtonState()
 *  
 *  Summary:
 *    Returns the current queue-synchronized mouse button state on the
 *    primary input device.
 *  
 *  Discussion:
 *    At any point in the handling of user input, there are two
 *    different mouse button states: the queue-synchronized state and
 *    the hardware state. The hardware state reflects the actual
 *    current state of the mouse attached to the user's machine. The
 *    queue-synchronized state reflects the state according to the
 *    events that have been processed at that point by the application.
 *    These two states may be different if there are unprocessed events
 *    in the event queue, or if events are being artificially
 *    introduced into the event queue from an outside source.
 *    GetCurrentEventButtonState returns the queue-synchronized button
 *    state. It is generally better to use this API than to use the
 *    Button function or the GetCurrentButtonState function (which
 *    return the hardware state). This gives a more consistent user
 *    experience when the user input queue is being remoted controlled
 *    or manipulated via non-hardware event sources such as speech or
 *    AppleEvents; using GetCurrentEventButtonState is also much faster
 *    than using Button or GetCurrentButtonState.
 *    
 *    Note that GetCurrentEventButtonState only returns a valid button
 *    state if your application is the active application. If your
 *    application is not active, then user input events are not flowing
 *    through the event dispatcher and the queue-synchronized state is
 *    not updated.
 *  
 *  Result:
 *    The queue-synchronized state of the mouse buttons. Bit zero
 *    indicates the state of the primary button, bit one the state of
 *    the secondary button, and so on.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        not available in CarbonLib 1.x, is available on Mac OS X version 10.2 and later
 *    Mac OS X:         in version 10.2 and later
 */
EXTERN_API_C( UInt32 )
GetCurrentEventButtonState(void);


/*
 *  GetCurrentEventKeyModifiers()
 *  
 *  Summary:
 *    Returns the current queue-synchronized keyboard modifier state.
 *  
 *  Discussion:
 *    At any point in the handling of user input, there are two
 *    different keyboard modifier states: the queue-synchronized state
 *    and the hardware state. The hardware state reflects the actual
 *    current state of the keyboard attached to the user's machine. The
 *    queue-synchronized state reflects the state according to the
 *    events that have been processed at that point by the application.
 *    These two states may be different if there are unprocessed events
 *    in the event queue, or if events are being artificially
 *    introduced into the event queue from an outside source.
 *    GetCurrentEventKeyModifiers returns the queue-synchronized
 *    modifier state. It is generally better to use this API than to
 *    use the GetCurrentKeyModifiers API (which returns the hardware
 *    state). This gives a more consistent user experience when the
 *    user input queue is being remoted controlled or manipulated via
 *    non-hardware event sources such as speech or AppleEvents; using
 *    GetCurrentEventKeyModifiers is also much faster than using
 *    EventAvail(0, &eventRecord) or GetCurrentKeyModifiers.
 *    
 *    Note that GetCurrentEventKeyModifiers only returns a valid
 *    modifier state if your application is the active application. If
 *    your application is not active, then user input events are not
 *    flowing through the event dispatcher and the queue-synchronized
 *    state is not updated.
 *  
 *  Result:
 *    The queue-synchronized state of the keyboard modifiers. The
 *    format of the return value is the same as the modifiers field of
 *    an EventRecord (but only includes keyboard modifiers and not the
 *    other modifier flags included in an EventRecord).
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        not available in CarbonLib 1.x, is available on Mac OS X version 10.2 and later
 *    Mac OS X:         in version 10.2 and later
 */
EXTERN_API_C( UInt32 )
GetCurrentEventKeyModifiers(void);


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  Multiple-button support                                                             */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*
 *  GetCurrentButtonState()
 *  
 *  Summary:
 *    Returns the current hardware mouse button state on the primary
 *    input device.
 *  
 *  Discussion:
 *    In most cases, you should not use GetCurrentButtonState, but
 *    should use the GetCurrentEventButtonState function instead.
 *    GetCurrentEventButtonState is much faster than
 *    GetCurrentButtonState because it returns the locally cached
 *    button state; GetCurrentButtonState must get the mouse button
 *    state from the window server, which is slower. Using
 *    GetCurrentButtonState also can prevent your application from
 *    being operated by remote posting of events, since the hardware
 *    input device is not actually changing state in that case. Most
 *    commonly, you might need to use GetCurrentButtonState when your
 *    application is not the active application (as determined by the
 *    Process Manager function GetFrontProcess). In that case, the
 *    cached button state returned by GetCurrentEventButtonState is not
 *    valid because mouse button events are not flowing to your
 *    application, and you must use GetCurrentButtonState to determine
 *    the current hardware state.
 *  
 *  Result:
 *    The state of the mouse buttons on the mouse hardware. Bit zero
 *    indicates the state of the primary button, bit one the state of
 *    the secondary button, and so on.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        not available in CarbonLib 1.x, is available on Mac OS X version 10.2 and later
 *    Mac OS X:         in version 10.2 and later
 */
EXTERN_API_C( UInt32 )
GetCurrentButtonState(void);


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Helpful utilities                                                                 */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

/*
 *  GetCurrentEventTime()
 *  
 *  Discussion:
 *    Returns the current time since last system startup in seconds.
 *  
 *  Result:
 *    EventTime.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( EventTime )
GetCurrentEventTime(void);


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Timers                                                                            */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

/*
 *  EventLoopTimerRef
 *  
 *  Discussion:
 *    An EventLoopTimerRef represents what we term a 'timer'. A timer
 *    is a function that is called either once or at regular intervals.
 *    It executes at task level and should not be confused with Time
 *    Manager Tasks or any other interrupt-level callback. This means
 *    you can call Toolbox routines, allocate memory and draw. When a
 *    timer 'fires', it calls a callback that you specify when the
 *    timer is installed. Timers in general have two uses - as a
 *    timeout mechanism and as a periodic task. An everyday example of
 *    using a timer for a timeout might be a light that goes out if no
 *    motion is detected in a room for 5 minutes. For this, you might
 *    install a timer which will fire in 5 minutes. If motion is
 *    detected, you would reset the timer fire time and let the clock
 *    start over. If no motion is detected for the full 5 minutes, the
 *    timer will fire and you could power off the light. A periodic
 *    timer is one that fires at regular intervals (say every second or
 *    so). You might use such a timer to blink the insertion point in
 *    your editor, etc. One advantage of timers is that you can install
 *    the timer right from the code that wants the time. For example,
 *    the standard Toolbox Edit Text control can install a timer to
 *    blink the cursor when it's active, meaning that IdleControls is a
 *    no-op for that control and doesn't need to be called. When the
 *    control is inactive, it removes its timer and doesn't waste CPU
 *    time in that state. NOTE: Currently, if you do decide to draw
 *    when your timer is called, be sure to save and restore the
 *    current port so that calling your timer doesn't inadvertently
 *    change the port out from under someone.
 */
typedef struct __EventLoopTimer*        EventLoopTimerRef;

/*
 *  EventLoopTimerProcPtr
 *  
 *  Discussion:
 *    Called when a timer fires.
 *  
 *  Parameters:
 *    
 *    inTimer:
 *      The timer that fired.
 *    
 *    inUserData:
 *      The data passed into InstallEventLoopTimer.
 */
typedef CALLBACK_API( void , EventLoopTimerProcPtr )(EventLoopTimerRef inTimer, void *inUserData);

/*
 *  Discussion:
 *    Event Loop Idle Timer Messages
 */
enum {

  /*
   * The user has gone idle (not touched an input device) for the
   * duration specified in your idle timer. This is the first message
   * you will receive. Start your engines!
   */
  kEventLoopIdleTimerStarted    = 1,

  /*
   * If you specified an interval on your idle timer, your idle timer
   * proc will be called with this message, letting you know it is
   * merely firing at the interval specified. If you did not specify an
   * interval, this message is not sent.
   */
  kEventLoopIdleTimerIdling     = 2,

  /*
   * The user is back! Stop everything! This is your cue to stop any
   * processing if you need to.
   */
  kEventLoopIdleTimerStopped    = 3
};

typedef UInt16                          EventLoopIdleTimerMessage;

/*
 *  EventLoopIdleTimerProcPtr
 *  
 *  Discussion:
 *    Called when an idle timer fires.
 *  
 *  Parameters:
 *    
 *    inTimer:
 *      The timer that fired.
 *    
 *    inState:
 *      The current state of the timer.
 *    
 *    inUserData:
 *      The data passed into InstallEventLoopTimer.
 */
typedef CALLBACK_API( void , EventLoopIdleTimerProcPtr )(EventLoopTimerRef inTimer, EventLoopIdleTimerMessage inState, void *inUserData);
typedef STACK_UPP_TYPE(EventLoopTimerProcPtr)                   EventLoopTimerUPP;
typedef STACK_UPP_TYPE(EventLoopIdleTimerProcPtr)               EventLoopIdleTimerUPP;
/*
 *  NewEventLoopTimerUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( EventLoopTimerUPP )
NewEventLoopTimerUPP(EventLoopTimerProcPtr userRoutine);
#if !OPAQUE_UPP_TYPES
  enum { uppEventLoopTimerProcInfo = 0x000003C0 };  /* pascal no_return_value Func(4_bytes, 4_bytes) */
  #ifdef __cplusplus
    inline DEFINE_API_C(EventLoopTimerUPP) NewEventLoopTimerUPP(EventLoopTimerProcPtr userRoutine) { return (EventLoopTimerUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), uppEventLoopTimerProcInfo, GetCurrentArchitecture()); }
  #else
    #define NewEventLoopTimerUPP(userRoutine) (EventLoopTimerUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), uppEventLoopTimerProcInfo, GetCurrentArchitecture())
  #endif
#endif

#if CALL_NOT_IN_CARBON
/*
 *  NewEventLoopIdleTimerUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        not available
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( EventLoopIdleTimerUPP )
NewEventLoopIdleTimerUPP(EventLoopIdleTimerProcPtr userRoutine);
#if !OPAQUE_UPP_TYPES
  enum { uppEventLoopIdleTimerProcInfo = 0x00000EC0 };  /* pascal no_return_value Func(4_bytes, 2_bytes, 4_bytes) */
  #ifdef __cplusplus
    inline DEFINE_API_C(EventLoopIdleTimerUPP) NewEventLoopIdleTimerUPP(EventLoopIdleTimerProcPtr userRoutine) { return (EventLoopIdleTimerUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), uppEventLoopIdleTimerProcInfo, GetCurrentArchitecture()); }
  #else
    #define NewEventLoopIdleTimerUPP(userRoutine) (EventLoopIdleTimerUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), uppEventLoopIdleTimerProcInfo, GetCurrentArchitecture())
  #endif
#endif

#endif  /* CALL_NOT_IN_CARBON */

/*
 *  DisposeEventLoopTimerUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( void )
DisposeEventLoopTimerUPP(EventLoopTimerUPP userUPP);
#if !OPAQUE_UPP_TYPES
  #ifdef __cplusplus
      inline DEFINE_API_C(void) DisposeEventLoopTimerUPP(EventLoopTimerUPP userUPP) { DisposeRoutineDescriptor((UniversalProcPtr)userUPP); }
  #else
      #define DisposeEventLoopTimerUPP(userUPP) DisposeRoutineDescriptor(userUPP)
  #endif
#endif

#if CALL_NOT_IN_CARBON
/*
 *  DisposeEventLoopIdleTimerUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        not available
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( void )
DisposeEventLoopIdleTimerUPP(EventLoopIdleTimerUPP userUPP);
#if !OPAQUE_UPP_TYPES
  #ifdef __cplusplus
      inline DEFINE_API_C(void) DisposeEventLoopIdleTimerUPP(EventLoopIdleTimerUPP userUPP) { DisposeRoutineDescriptor((UniversalProcPtr)userUPP); }
  #else
      #define DisposeEventLoopIdleTimerUPP(userUPP) DisposeRoutineDescriptor(userUPP)
  #endif
#endif

#endif  /* CALL_NOT_IN_CARBON */

/*
 *  InvokeEventLoopTimerUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( void )
InvokeEventLoopTimerUPP(
  EventLoopTimerRef  inTimer,
  void *             inUserData,
  EventLoopTimerUPP  userUPP);
#if !OPAQUE_UPP_TYPES
  #ifdef __cplusplus
      inline DEFINE_API_C(void) InvokeEventLoopTimerUPP(EventLoopTimerRef inTimer, void * inUserData, EventLoopTimerUPP userUPP) { CALL_TWO_PARAMETER_UPP(userUPP, uppEventLoopTimerProcInfo, inTimer, inUserData); }
  #else
    #define InvokeEventLoopTimerUPP(inTimer, inUserData, userUPP) CALL_TWO_PARAMETER_UPP((userUPP), uppEventLoopTimerProcInfo, (inTimer), (inUserData))
  #endif
#endif

#if CALL_NOT_IN_CARBON
/*
 *  InvokeEventLoopIdleTimerUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        not available
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( void )
InvokeEventLoopIdleTimerUPP(
  EventLoopTimerRef          inTimer,
  EventLoopIdleTimerMessage  inState,
  void *                     inUserData,
  EventLoopIdleTimerUPP      userUPP);
#if !OPAQUE_UPP_TYPES
  #ifdef __cplusplus
      inline DEFINE_API_C(void) InvokeEventLoopIdleTimerUPP(EventLoopTimerRef inTimer, EventLoopIdleTimerMessage inState, void * inUserData, EventLoopIdleTimerUPP userUPP) { CALL_THREE_PARAMETER_UPP(userUPP, uppEventLoopIdleTimerProcInfo, inTimer, inState, inUserData); }
  #else
    #define InvokeEventLoopIdleTimerUPP(inTimer, inState, inUserData, userUPP) CALL_THREE_PARAMETER_UPP((userUPP), uppEventLoopIdleTimerProcInfo, (inTimer), (inState), (inUserData))
  #endif
#endif

#endif  /* CALL_NOT_IN_CARBON */

#if CALL_NOT_IN_CARBON || OLDROUTINENAMES
    /* support for pre-Carbon UPP routines: New...Proc and Call...Proc */
    #define NewEventLoopTimerProc(userRoutine)                  NewEventLoopTimerUPP(userRoutine)
    #define NewEventLoopIdleTimerProc(userRoutine)              NewEventLoopIdleTimerUPP(userRoutine)
    #define CallEventLoopTimerProc(userRoutine, inTimer, inUserData) InvokeEventLoopTimerUPP(inTimer, inUserData, userRoutine)
    #define CallEventLoopIdleTimerProc(userRoutine, inTimer, inState, inUserData) InvokeEventLoopIdleTimerUPP(inTimer, inState, inUserData, userRoutine)
#endif /* CALL_NOT_IN_CARBON */

/*
 *  InstallEventLoopTimer()
 *  
 *  Discussion:
 *    Installs a timer onto the event loop specified. The timer can
 *    either fire once or repeatedly at a specified interval depending
 *    on the parameters passed to this function.
 *  
 *  Parameters:
 *    
 *    inEventLoop:
 *      The event loop to add the timer.
 *    
 *    inFireDelay:
 *      The delay before first firing this timer (can be 0, to request
 *      that the timer be fired as soon as control returns to your
 *      event loop). In Mac OS X and CarbonLib 1.5 and later, you may
 *      pass kEventDurationForever to stop the timer from firing at all
 *      until SetEventLoopTimerNextFireTime is used to start it; in
 *      earlier CarbonLibs, to achieve the same effect, just pass zero
 *      and then immediately call SetEventLoopTimerNextFireTime( timer,
 *      kEventDurationForever ) before returning control to your event
 *      loop.
 *    
 *    inInterval:
 *      The timer interval (pass 0 for a one-shot timer, which executes
 *      once but does not repeat). In Mac OS X and CarbonLib 1.5 and
 *      later, you may also pass kEventDurationForever to create a
 *      one-shot timer.
 *    
 *    inTimerProc:
 *      The routine to call when the timer fires.
 *    
 *    inTimerData:
 *      Data to pass to the timer proc when called.
 *    
 *    outTimer:
 *      A reference to the newly installed timer.
 *  
 *  Result:
 *    An operating system status code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
InstallEventLoopTimer(
  EventLoopRef         inEventLoop,
  EventTimerInterval   inFireDelay,
  EventTimerInterval   inInterval,
  EventLoopTimerUPP    inTimerProc,
  void *               inTimerData,
  EventLoopTimerRef *  outTimer);


/*
 *  InstallEventLoopIdleTimer()
 *  
 *  Discussion:
 *    Installs a timer onto the event loop specified. Idle timers are
 *    only called when there is no user activity occuring in the
 *    application. This means that the user is not actively
 *    clicking/typing, and is also not in the middle of tracking a
 *    control, menu, or window. TrackMouseLocation actually disables
 *    all idle timers automatically for you.
 *  
 *  Parameters:
 *    
 *    inEventLoop:
 *      The event loop to add the timer.
 *    
 *    inDelay:
 *      The delay before firing this timer after a user input event has
 *      come in. For example, if you want to start your timer 2 seconds
 *      after the user stops typing, etc. you would pass 2.0 into this
 *      parameter. Each time the user types a key (or whatever), this
 *      timer is reset. If we are considered to be idle when an idle
 *      timer is installed, the first time it fires will be inDelay
 *      seconds from the time it is installed. So if you installed it
 *      in the middle of control tracking, say, it wouldn't fire until
 *      the user stopped tracking. But if you installed it at app
 *      startup and the user hasn't typed/clicked, it would fire in
 *      inDelay seconds.
 *    
 *    inInterval:
 *      The timer interval (pass 0 for a one-shot timer, which executes
 *      once but does not repeat). You may also pass
 *      kEventDurationForever to create a one-shot timer.
 *    
 *    inTimerProc:
 *      The routine to call when the timer fires.
 *    
 *    inTimerData:
 *      Data to pass to the timer proc when called.
 *    
 *    outTimer:
 *      A reference to the newly installed timer.
 *  
 *  Result:
 *    An operating system status code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
InstallEventLoopIdleTimer(
  EventLoopRef            inEventLoop,
  EventTimerInterval      inDelay,
  EventTimerInterval      inInterval,
  EventLoopIdleTimerUPP   inTimerProc,
  void *                  inTimerData,
  EventLoopTimerRef *     outTimer);


/* GOING AWAY!!!! DO NOT CALL THIS API!!!!! USE INSTALLEVENTLOOPIDLETIMER ABOVE!!!! */
/*
 *  InstallIdleTimer()
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
InstallIdleTimer(
  EventLoopRef         inEventLoop,
  EventTimerInterval   inDelay,
  EventTimerInterval   inInterval,
  EventLoopTimerUPP    inTimerProc,
  void *               inTimerData,
  EventLoopTimerRef *  outTimer);


/*
 *  RemoveEventLoopTimer()
 *  
 *  Discussion:
 *    Removes a timer that was previously installed by a call to
 *    InstallEventLoopTimer. You call this function when you are done
 *    using a timer.
 *  
 *  Parameters:
 *    
 *    inTimer:
 *      The timer to remove.
 *  
 *  Result:
 *    An operating system status code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
RemoveEventLoopTimer(EventLoopTimerRef inTimer);


/*
 *  SetEventLoopTimerNextFireTime()
 *  
 *  Discussion:
 *    This routine is used to 'reset' a timer. It controls the next
 *    time the timer fires. This will override any interval you might
 *    have set. For example, if you have a timer that fires every
 *    second, and you call this function setting the next time to five
 *    seconds from now, the timer will sleep for five seconds, then
 *    fire. It will then resume its one-second interval after that. It
 *    is as if you removed the timer and reinstalled it with a new
 *    first-fire delay.
 *  
 *  Parameters:
 *    
 *    inTimer:
 *      The timer to adjust
 *    
 *    inNextFire:
 *      The interval from the current time to wait until firing the
 *      timer again. You may pass kEventDurationForever to stop the
 *      timer from firing at all.
 *  
 *  Result:
 *    An operating system status code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
SetEventLoopTimerNextFireTime(
  EventLoopTimerRef    inTimer,
  EventTimerInterval   inNextFire);




/*======================================================================================*/
/*  EVENT HANDLERS                                                                      */
/*======================================================================================*/

typedef struct OpaqueEventHandlerRef*   EventHandlerRef;
typedef struct OpaqueEventHandlerCallRef*  EventHandlerCallRef;

/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ EventHandler specification                                                        */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

/*
 *  EventHandlerProcPtr
 *  
 *  Discussion:
 *    Callback for receiving events sent to a target this callback is
 *    installed on.
 *  
 *  Parameters:
 *    
 *    inHandlerCallRef:
 *      A reference to the current handler call chain. This is sent to
 *      your handler so that you can call CallNextEventHandler if you
 *      need to.
 *    
 *    inEvent:
 *      The Event.
 *    
 *    inUserData:
 *      The app-specified data you passed in a call to
 *      InstallEventHandler.
 *  
 *  Result:
 *    An operating system result code. Returning noErr indicates you
 *    handled the event. Returning eventNotHandledErr indicates you did
 *    not handle the event and perhaps the toolbox should take other
 *    action.
 */
typedef CALLBACK_API( OSStatus , EventHandlerProcPtr )(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void *inUserData);
typedef STACK_UPP_TYPE(EventHandlerProcPtr)                     EventHandlerUPP;
/*
 *  NewEventHandlerUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( EventHandlerUPP )
NewEventHandlerUPP(EventHandlerProcPtr userRoutine);
#if !OPAQUE_UPP_TYPES
  enum { uppEventHandlerProcInfo = 0x00000FF0 };  /* pascal 4_bytes Func(4_bytes, 4_bytes, 4_bytes) */
  #ifdef __cplusplus
    inline DEFINE_API_C(EventHandlerUPP) NewEventHandlerUPP(EventHandlerProcPtr userRoutine) { return (EventHandlerUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), uppEventHandlerProcInfo, GetCurrentArchitecture()); }
  #else
    #define NewEventHandlerUPP(userRoutine) (EventHandlerUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), uppEventHandlerProcInfo, GetCurrentArchitecture())
  #endif
#endif

/*
 *  DisposeEventHandlerUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( void )
DisposeEventHandlerUPP(EventHandlerUPP userUPP);
#if !OPAQUE_UPP_TYPES
  #ifdef __cplusplus
      inline DEFINE_API_C(void) DisposeEventHandlerUPP(EventHandlerUPP userUPP) { DisposeRoutineDescriptor((UniversalProcPtr)userUPP); }
  #else
      #define DisposeEventHandlerUPP(userUPP) DisposeRoutineDescriptor(userUPP)
  #endif
#endif

/*
 *  InvokeEventHandlerUPP()
 *  
 *  Availability:
 *    Non-Carbon CFM:   available as macro/inline
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API_C( OSStatus )
InvokeEventHandlerUPP(
  EventHandlerCallRef  inHandlerCallRef,
  EventRef             inEvent,
  void *               inUserData,
  EventHandlerUPP      userUPP);
#if !OPAQUE_UPP_TYPES
  #ifdef __cplusplus
      inline DEFINE_API_C(OSStatus) InvokeEventHandlerUPP(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void * inUserData, EventHandlerUPP userUPP) { return (OSStatus)CALL_THREE_PARAMETER_UPP(userUPP, uppEventHandlerProcInfo, inHandlerCallRef, inEvent, inUserData); }
  #else
    #define InvokeEventHandlerUPP(inHandlerCallRef, inEvent, inUserData, userUPP) (OSStatus)CALL_THREE_PARAMETER_UPP((userUPP), uppEventHandlerProcInfo, (inHandlerCallRef), (inEvent), (inUserData))
  #endif
#endif

#if CALL_NOT_IN_CARBON || OLDROUTINENAMES
    /* support for pre-Carbon UPP routines: New...Proc and Call...Proc */
    #define NewEventHandlerProc(userRoutine)                    NewEventHandlerUPP(userRoutine)
    #define CallEventHandlerProc(userRoutine, inHandlerCallRef, inEvent, inUserData) InvokeEventHandlerUPP(inHandlerCallRef, inEvent, inUserData, userRoutine)
#endif /* CALL_NOT_IN_CARBON */

typedef struct OpaqueEventTargetRef*    EventTargetRef;
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Installing Event Handlers                                                         */
/*                                                                                      */
/* Use these routines to install event handlers for a specific toolbox object. You may  */
/* pass zero for inNumTypes and NULL for inList if you need to be in a situation where  */
/* you know you will be receiving events, but not exactly which ones at the time you    */
/* are installing the handler. Later, your application can call the Add/Remove routines */
/* listed below this section.                                                           */
/*                                                                                      */
/* You can only install a specific handler once. The combination of inHandler and       */
/* inUserData is considered the 'signature' of a handler. Any attempt to install a new  */
/* handler with the same proc and user data as an already-installed handler will result */
/* in eventHandlerAlreadyInstalledErr. Installing the same proc and user data on a      */
/* different object is legal.                                                           */
/*                                                                                      */
/* Upon successful completion of this routine, you are returned an EventHandlerRef,     */
/* which you can use in various other calls, and is passed to your event handler. You   */
/* use it to extract information about the handler, such as the target (window, etc.)   */
/* if you have the same handler installed for different objects and need to perform     */
/* actions on the current target (say, call a window manager function).                 */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*
 *  InstallEventHandler()
 *  
 *  Discussion:
 *    Installs an event handler on a specified target. Your handler
 *    proc will be called with the events you registered with when an
 *    event of the corresponding type and class are send to the target
 *    you are installing your handler on.
 *  
 *  Parameters:
 *    
 *    inTarget:
 *      The target to register your handler with.
 *    
 *    inHandler:
 *      A pointer to your handler function.
 *    
 *    inNumTypes:
 *      The number of events you are registering for.
 *    
 *    inList:
 *      A pointer to an array of EventTypeSpec entries representing the
 *      events you are interested in.
 *    
 *    inUserData:
 *      The value passed in this parameter is passed on to your event
 *      handler proc when it is called.
 *    
 *    outRef:
 *      Receives an EventHandlerRef, which you can use later to remove
 *      the handler. You can pass null if you don't want the reference
 *      - when the target is disposed, the handler will be disposed as
 *      well.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
InstallEventHandler(
  EventTargetRef         inTarget,
  EventHandlerUPP        inHandler,
  UInt32                 inNumTypes,
  const EventTypeSpec *  inList,
  void *                 inUserData,
  EventHandlerRef *      outRef);          /* can be NULL */


/*
 *  InstallStandardEventHandler()
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
InstallStandardEventHandler(EventTargetRef inTarget);


/*
 *  RemoveEventHandler()
 *  
 *  Discussion:
 *    Removes an event handler from the target it was bound to.
 *  
 *  Parameters:
 *    
 *    inHandlerRef:
 *      The handler ref to remove (returned in a call to
 *      InstallEventHandler). After you call this function, the handler
 *      ref is considered to be invalid and can no longer be used.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
RemoveEventHandler(EventHandlerRef inHandlerRef);


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Adjusting set of event types after a handler is created                           */
/*                                                                                      */
/* After installing a handler with the routine above, you can adjust the event type     */
/* list telling the toolbox what events to send to that handler by calling the two      */
/* routines below. If you add an event type twice for the same handler, your handler    */
/* will only be called once, but it will take two RemoveEventType calls to stop your    */
/* handler from being called with that event type. In other words, the install count    */
/* for each event type is maintained by the toolbox. This might allow you, for example  */
/* to have subclasses of a window object register for types without caring if the base  */
/* class has already registered for that type. When the subclass removes its types, it  */
/* can successfully do so without affecting the base class's reception of its event     */
/* types, yielding eternal bliss.                                                       */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

/*
 *  AddEventTypesToHandler()
 *  
 *  Discussion:
 *    Adds additional events to an event handler that has already been
 *    installed.
 *  
 *  Parameters:
 *    
 *    inHandlerRef:
 *      The event handler to add the additional events to.
 *    
 *    inNumTypes:
 *      The number of events to add.
 *    
 *    inList:
 *      A pointer to an array of EventTypeSpec entries.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
AddEventTypesToHandler(
  EventHandlerRef        inHandlerRef,
  UInt32                 inNumTypes,
  const EventTypeSpec *  inList);


/*
 *  RemoveEventTypesFromHandler()
 *  
 *  Discussion:
 *    Removes events from an event handler that has already been
 *    installed.
 *  
 *  Parameters:
 *    
 *    inHandlerRef:
 *      The event handler to remove the events from.
 *    
 *    inNumTypes:
 *      The number of events to remove.
 *    
 *    inList:
 *      A pointer to an array of EventTypeSpec entries.
 *  
 *  Result:
 *    An operating system status code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
RemoveEventTypesFromHandler(
  EventHandlerRef        inHandlerRef,
  UInt32                 inNumTypes,
  const EventTypeSpec *  inList);


/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Explicit Propogation                                                              */
/*                                                                                      */
/*  CallNextEventHandler can be used to call thru to all handlers below the current     */
/*  handler being called. You pass the EventHandlerCallRef passed to your EventHandler  */
/*  into this call so that we know how to properly forward the event. The result of     */
/*  this function should normally be the result of your own handler that you called     */
/*  this API from. The typical use of this routine would be to allow the toolbox to do  */
/*  its standard processing and then follow up with some type of embellishment.         */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

/*
 *  CallNextEventHandler()
 *  
 *  Discussion:
 *    Calls thru to the event handlers below you in the event handler
 *    stack of the target to which your handler is bound. You might use
 *    this to call thru to the default toolbox handling in order to
 *    post-process the event. You can only call this routine from
 *    within an event handler.
 *  
 *  Parameters:
 *    
 *    inCallRef:
 *      The event handler call ref passed into your event handler.
 *    
 *    inEvent:
 *      The event to pass thru.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
CallNextEventHandler(
  EventHandlerCallRef   inCallRef,
  EventRef              inEvent);



/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/
/*  ₯ Sending Events                                                                    */
/*ΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡΡ*/

/*
 *  Discussion:
 *    EventTarget Send Options
 */
enum {

  /*
   * The event should be sent to the target given only, and should not
   * propagate to any other target. CallNextEventHandler will do
   * nothing in a handler which has received an event sent in this
   * manner.
   */
  kEventTargetDontPropagate     = (1 << 0),

  /*
   * The event is a notification-style event, and should be received by
   * all handlers. The result is usually meaningless when sent in this
   * manner, though we do maintain the strongest result code while the
   * event falls through each handler. This means that if the first
   * handler to receive the event returned noErr, and the next returned
   * eventNotHandledErr, the result returned would actually be noErr.
   * No handler can stop this event from propagating, i.e. the result
   * code does not alter event flow.
   */
  kEventTargetSendToAllHandlers = (1 << 1)
};

/*
 *  SendEventToEventTarget()
 *  
 *  Discussion:
 *    Sends an event to the specified event target.
 *  
 *  Parameters:
 *    
 *    inEvent:
 *      The event to send.
 *    
 *    inTarget:
 *      The target to send it to.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        in CarbonLib 1.1 and later
 *    Mac OS X:         in version 10.0 and later
 */
EXTERN_API( OSStatus )
SendEventToEventTarget(
  EventRef         inEvent,
  EventTargetRef   inTarget);


/*
 *  SendEventToEventTargetWithOptions()
 *  
 *  Discussion:
 *    Sends an event to the specified event target, optionally
 *    controlling how the event propagates. See the discussion of the
 *    event send options above for more detail.
 *  
 *  Parameters:
 *    
 *    inEvent:
 *      The event to send.
 *    
 *    inTarget:
 *      The target to send it to.
 *    
 *    inOptions:
 *      The options to modify the send behavior. Passing zero for this
 *      makes it behave just like SendEventToEventTarget.
 *  
 *  Result:
 *    An operating system result code.
 *  
 *  Availability:
 *    Non-Carbon CFM:   not available
 *    CarbonLib:        not available in CarbonLib 1.x, is available on Mac OS X version 10.2 and later
 *    Mac OS X:         in version 10.2 and later
 */
EXTERN_API_C( OSStatus )
SendEventToEventTargetWithOptions(
  EventRef         inEvent,
  EventTargetRef   inTarget,
  OptionBits       inOptions);




#if PRAGMA_STRUCT_ALIGN
    #pragma options align=reset
#elif PRAGMA_STRUCT_PACKPUSH
    #pragma pack(pop)
#elif PRAGMA_STRUCT_PACK
    #pragma pack()
#endif

#ifdef PRAGMA_IMPORT_OFF
#pragma import off
#elif PRAGMA_IMPORT
#pragma import reset
#endif

#ifdef __cplusplus
}
#endif

#endif /* __CARBONEVENTSCORE__ */

