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/*
* tkMacOSXEvent.c --
*
* This file contains the basic Mac OS X Event handling routines.
*
* Copyright (c) 1995-1997 Sun Microsystems, Inc.
* Copyright 2001, Apple Computer, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tkMacOSXEvent.c,v 1.3.2.2 2005/08/09 07:39:55 das Exp $
*/
#include <stdio.h>
#include "tkMacOSXInt.h"
#include "tkMacOSXEvent.h"
#include "tkMacOSXDebug.h"
/*
* Enable this define to get debug printing for events not handled.
*/
/*#define TK_MAC_DEBUG 1 */
/*
* Forward declarations of procedures used in this file.
*/
static int TkMacOSXProcessAppleEvent(
TkMacOSXEvent * eventPtr, MacEventStatus * statusPtr);
static int ReceiveAndProcessEvent (void);
/*
* Global data used in this file.
*/
static EventTargetRef targetRef;
/*
*----------------------------------------------------------------------
*
* tkMacOSXFlushWindows --
*
* This routine flushes all the Carbon windows of the application. It
* is called by the setup procedure for the Tcl/Carbon event source.
*
* Results:
* None.
*
* Side effects:
* Flushes all Carbon windows
*
*----------------------------------------------------------------------
*/
void
tkMacOSXFlushWindows ()
{
WindowRef wRef = GetWindowList();
while (wRef) {
CGrafPtr portPtr = GetWindowPort(wRef);
if (QDIsPortBuffered(portPtr)) {
QDFlushPortBuffer(portPtr, NULL);
}
wRef = GetNextWindow(wRef);
}
}
int
XSync (Display *display, Bool flag)
{
tkMacOSXFlushWindows();
display->request++;
return 0;
}
/*
*----------------------------------------------------------------------
*
* TkMacOSXCountAndProcessMacEvents --
*
* This routine receives any Carbon events that are in the queue and
* converts them to Tk events. It is called by the event set-up and
* check routines
*
* Results:
* The number of events in the queue.
*
* Side effects:
* Tells the Window Manager to deliver events to the event queue of the
* current thread. Receives any Carbon events on the queue and converts
* them to Tk events.
*
*----------------------------------------------------------------------
*/
int
TkMacOSXCountAndProcessMacEvents()
{
EventQueueRef qPtr;
int eventCount;
qPtr = GetMainEventQueue();
eventCount = GetNumEventsInQueue(qPtr);
if (eventCount) {
int n, err;
for (n = 0, err = 0;n<eventCount && !err;n++) {
err = ReceiveAndProcessEvent();
}
}
return eventCount;
}
/*
*----------------------------------------------------------------------
*
* TkMacOSXProcessAppleEvent --
*
* This processes Apple events
*
* Results:
* 0 on success
* -1 on failure
*
* Side effects:
* Calls the Tk high-level event handler
*
*----------------------------------------------------------------------
*/
static int
TkMacOSXProcessAppleEvent(TkMacOSXEvent * eventPtr, MacEventStatus * statusPtr)
{
int err;
EventRecord eventRecord;
if (ConvertEventRefToEventRecord(eventPtr->eventRef,
&eventRecord )) {
err = TkMacOSXDoHLEvent(&eventRecord);
if (err != noErr) {
char buf1 [ 256 ];
char buf2 [ 256 ];
fprintf(stderr,
"TkMacOSXDoHLEvent failed : %s,%s,%d\n",
CarbonEventToAscii(eventPtr->eventRef, buf1),
ClassicEventToAscii(&eventRecord,buf2), err);
statusPtr->err = 1;
}
} else {
statusPtr->err = 1;
fprintf(stderr,"ConvertEventRefToEventRecord failed\n");
}
return 0;
}
/*
*----------------------------------------------------------------------
*
* TkMacOSXProcessEvent --
*
* This dispatches a filtered Carbon event to the appropriate handler
*
* Note on MacEventStatus.stopProcessing: Please be conservative in the
* individual handlers and don't assume the event is fully handled
* unless you *really* need to ensure that other handlers don't see the
* event anymore. Some OS manager or library might be interested in
* events even after they are already handled on the Tk level.
*
* Results:
* 0 on success
* -1 on failure
*
* Side effects:
* Converts a Carbon event to a Tk event
*
*----------------------------------------------------------------------
*/
int
TkMacOSXProcessEvent(TkMacOSXEvent * eventPtr, MacEventStatus * statusPtr)
{
switch (eventPtr->eClass) {
case kEventClassMouse:
TkMacOSXProcessMouseEvent(eventPtr, statusPtr);
break;
case kEventClassWindow:
TkMacOSXProcessWindowEvent(eventPtr, statusPtr);
break;
case kEventClassKeyboard:
TkMacOSXProcessKeyboardEvent(eventPtr, statusPtr);
break;
case kEventClassApplication:
TkMacOSXProcessApplicationEvent(eventPtr, statusPtr);
break;
case kEventClassAppleEvent:
TkMacOSXProcessAppleEvent(eventPtr, statusPtr);
break;
case kEventClassWish:
statusPtr->stopProcessing = 1;
break;
default:
#ifdef TK_MAC_DEBUG
if (0)
{
char buf [ 256 ];
fprintf(stderr,
"Unrecognised event : %s\n",
CarbonEventToAscii(eventPtr->eventRef, buf));
}
#endif
break;
}
return 0;
}
/*
*----------------------------------------------------------------------
*
* ReceiveAndProcessEvent --
*
* This receives a carbon event and converts it to a Tk event
*
* Results:
* 0 on success
* Mac OS error number on failure
*
* Side effects:
* This receives the next Carbon event and converts it to the
* appropriate Tk event
*
*----------------------------------------------------------------------
*/
static int
ReceiveAndProcessEvent()
{
TkMacOSXEvent macEvent;
MacEventStatus eventStatus;
int err;
char buf [ 256 ];
/*
* This is a poll, since we have already counted the events coming
* into this routine, and are guaranteed to have one waiting.
*/
err = ReceiveNextEvent(0, NULL, kEventDurationNoWait,
true, &macEvent.eventRef);
if (err != noErr) {
return err;
} else {
macEvent.eClass = GetEventClass(macEvent.eventRef);
macEvent.eKind = GetEventKind(macEvent.eventRef);
macEvent.interp = NULL;
bzero(&eventStatus, sizeof(eventStatus));
TkMacOSXProcessEvent(&macEvent,&eventStatus);
if (!eventStatus.stopProcessing) {
if (!targetRef) {
targetRef = GetEventDispatcherTarget();
}
err = SendEventToEventTarget(macEvent.eventRef,targetRef);
if (err != noErr
#if !TK_MAC_DEBUG
&& err != eventNotHandledErr
#endif
) {
fprintf(stderr,
"RCNE SendEventToEventTarget (%s) failed, %d\n",
CarbonEventToAscii(macEvent.eventRef, buf),err);
}
}
ReleaseEvent(macEvent.eventRef);
return 0;
}
}
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