自学教程：C++ CallNextEventHandler函数代码示例

static OSStatus playerEvtHandler(EventHandlerCallRef nextHdlr, EventRef thisEvt, void *pvUserData){    ControlRef cRef;    ControlID cID;    OSStatus iErr;    UInt32 iSize, iPos;    HIPoint pMouse;    Rect rDims;    int iPct;        if ( (kEventClassWindow == GetEventClass(thisEvt)) &&         (kEventWindowClose == GetEventKind(thisEvt)) )    {        HideWindow(g_refPlayerWin);        g_bVisible = false;        return noErr;    }    else if ( (kEventClassControl == GetEventClass(thisEvt)) &&              (kEventControlClick == GetEventKind(thisEvt)) )    {        if (noErr != (iErr = GetEventParameter(thisEvt, kEventParamWindowMouseLocation, typeHIPoint, NULL, sizeof(Point), NULL, &pMouse)))        {            fprintf(stderr, "playerEvtHandler() - GetEventParameter(HitTest) failed, returning %lu!/n", (unsigned long) iErr);        }        cID.signature = FOUR_CHAR_CODE('fpos');        cID.id = 7;        if (noErr == (iErr = GetControlByID(g_refPlayerWin, &cID, &cRef)))        {            GetControlBounds(cRef, &rDims);            iSize = rDims.right - rDims.left;            iPos = (UInt32) pMouse.x - rDims.left;            iPct = (int) (100.0 * ((double) iPos) / ((double) iSize));        }        else        {            fprintf(stderr, "playerEvtHandler() - GetControlByID() failed, returning %lu!/n", (unsigned long) iErr);        }                attemptSeekTo(iPct);                return CallNextEventHandler(nextHdlr, thisEvt);            }    else    {        return CallNextEventHandler(nextHdlr, thisEvt);    }}

// -----------------------------------------------------------------------------//	HITestViewInitialize// -----------------------------------------------------------------------------//	The view is constructed.  Do anything necessary to initialize it.//OSStatus HITestViewInitialize(	EventHandlerCallRef		inCallRef,	EventRef			inEvent,	HITestViewData*			inData ){	OSStatus				err;	// Let any parent classes have a chance at initialization	err = CallNextEventHandler( inCallRef, inEvent );	require_noerr( err, TroubleInSuperClass );	// Extract the bounds from the initialization event	err = GetEventParameter( inEvent, 'redx', typeFloat,			NULL, sizeof( float ), NULL, &inData->red );	require_noerr( err, ParameterMissing );	err = GetEventParameter( inEvent, 'gren', typeFloat,			NULL, sizeof( float ), NULL, &inData->green );	require_noerr( err, ParameterMissing );	err = GetEventParameter( inEvent, 'blue', typeFloat,			NULL, sizeof( float ), NULL, &inData->blue );	require_noerr( err, ParameterMissing );	ParameterMissing:TroubleInSuperClass:	return err;}

//------------------------------------------------------------------------pascal OSStatus pxWindowNative::doKeyUp (EventHandlerCallRef nextHandler, EventRef theEvent, void* userData){	char key_code;	char char_code;	UInt32 modifier;		GetEventParameter (theEvent, kEventParamKeyMacCharCodes, typeChar, NULL, sizeof(char), NULL, &key_code);	GetEventParameter (theEvent, kEventParamKeyModifiers, typeUInt32, NULL, sizeof(UInt32), NULL, &modifier);	UInt32 kc;	GetEventParameter (theEvent, kEventParamKeyCode, typeUInt32, NULL, sizeof(UInt32), NULL, &kc);//	printf("VK UP: %lx/n", kc);	pxWindowNative* w = (pxWindowNative*)userData;	if (kc == 0x24) kc = 0x4c;	unsigned long flags = 0;		if (modifier & shiftKey) flags |= PX_MOD_SHIFT;	if (modifier & optionKey) flags |= PX_MOD_ALT;	if (modifier & controlKey) flags |= PX_MOD_CONTROL;	w->onKeyUp(kc, flags);	return CallNextEventHandler (nextHandler, theEvent);}

//------------------------------------------------------------------------pascal OSStatus DoMouseUp (EventHandlerCallRef nextHandler, EventRef theEvent, void* userData){	Point wheresMyMouse;	UInt32 modifier;		GetEventParameter (theEvent, kEventParamMouseLocation, typeQDPoint, NULL, sizeof(Point), NULL, &wheresMyMouse);	GlobalToLocal (&wheresMyMouse);	GetEventParameter (theEvent, kEventParamKeyModifiers, typeUInt32, NULL, sizeof(UInt32), NULL, &modifier);    platform_support * app = reinterpret_cast<platform_support*>(userData);    app->m_specific->m_cur_x = wheresMyMouse.h;    if(app->flip_y())    {        app->m_specific->m_cur_y = app->rbuf_window().height() - wheresMyMouse.v;    }    else    {        app->m_specific->m_cur_y = wheresMyMouse.v;    }    app->m_specific->m_input_flags = mouse_left | get_key_flags(modifier);    if(app->m_ctrls.on_mouse_button_up(app->m_specific->m_cur_x,                                        app->m_specific->m_cur_y))    {        app->on_ctrl_change();        app->force_redraw();    }    app->on_mouse_button_up(app->m_specific->m_cur_x,                             app->m_specific->m_cur_y,                             app->m_specific->m_input_flags);	return CallNextEventHandler (nextHandler, theEvent);}

static pascal OSStatus EventHandler(	EventHandlerCallRef nextHandler,	/* I - Next handler to call */	EventRef            event,		/* I - Event reference */	void                *userData)	/* I - User data (not used) */{	UInt32			kind;			/* Kind of event */	Rect			rect;			/* New window size */	EventMouseButton	button;			/* Mouse button */	Point			point;			/* Mouse position */	kind = GetEventKind(event);	switch (kind)	{	case kEventWindowBoundsChanged:		GetEventParameter(event, kEventParamCurrentBounds, typeQDRectangle, NULL, sizeof(Rect), NULL, &rect);		if (aglContext)			aglUpdateContext(aglContext);		altEngine.resize(rect.right - rect.left, rect.bottom - rect.top);		break;	case kEventWindowShown:		WindowVisible = 1;		break;	case kEventWindowHidden:		WindowVisible = 0;		break;	case kEventMouseDown:		GetEventParameter(event, kEventParamMouseButton, typeMouseButton, NULL, sizeof(EventMouseButton), NULL, &button);		GetEventParameter(event, kEventParamMouseLocation, typeQDPoint, NULL, sizeof(Point), NULL, &point);		//MouseFunc(button, 0, point.h, point.v);		break;	case kEventMouseUp:		GetEventParameter(event, kEventParamMouseButton, typeMouseButton, NULL, sizeof(EventMouseButton), NULL, &button);		GetEventParameter(event, kEventParamMouseLocation, typeQDPoint, NULL, sizeof(Point), NULL, &point);		//MouseFunc(button, 1, point.h, point.v);		break;	case kEventMouseDragged:		GetEventParameter(event, kEventParamMouseLocation, typeQDPoint, NULL, sizeof(Point), NULL, &point);		//MotionFunc(point.h, point.v);		break;	case kEventWindowClose:		altEngine.destroy();		ExitToShell();		break;	default:		return CallNextEventHandler(nextHandler, event);	}	return noErr;}

pascal OSStatus pxWindowNative::doWindowClosed(EventHandlerCallRef nextHandler, EventRef theEvent, void* userData){	pxWindowNative* w = (pxWindowNative*)userData;	w->onClose();	return CallNextEventHandler (nextHandler, theEvent);}	

pascal OSStatusCOSXScreenSaver::launchTerminationCallback(				EventHandlerCallRef nextHandler,				EventRef theEvent, void* userData){	OSStatus		result;    ProcessSerialNumber psn;     EventParamType	actualType;    UInt32			actualSize;    result = GetEventParameter(theEvent, kEventParamProcessID,							   typeProcessSerialNumber, &actualType,							   sizeof(psn), &actualSize, &psn);	if ((result == noErr) &&		(actualSize > 0) &&		(actualType == typeProcessSerialNumber)) {		COSXScreenSaver* screenSaver = (COSXScreenSaver*)userData;		UInt32 eventKind = GetEventKind(theEvent);		if (eventKind == kEventAppLaunched) {			screenSaver->processLaunched(psn);		}		else if (eventKind == kEventAppTerminated) {			screenSaver->processTerminated(psn);		}	}    return (CallNextEventHandler(nextHandler, theEvent));}

/*OvalsDrawEventHandler : Handles the draw events for the "Ovals" window.Parameter DescriptionsinHandler : A reference to the current handler call chain. This is passed to your handler so that you can call CallNextEventHandler if you need to.inEvent : The event that triggered this call.inUserData : The application-specific data you passed in to InstallEventHandler.*/OSStatus OvalsDrawEventHandler (EventHandlerCallRef inHandler, EventRef inEvent, void* inUserData) {	OSStatus status = eventNotHandledErr;	CGContextRef context;    CGRect r;		//CallNextEventHandler in order to make sure the default handling of the inEvent 	// (drawing the white background) happens	status = CallNextEventHandler( inHandler, inEvent );	require_noerr(status, CantCallNextEventHandler);		// Get the CGContextRef	status = GetEventParameter (inEvent, 								kEventParamCGContextRef, 								typeCGContextRef, 								NULL, 								sizeof (CGContextRef),								NULL,								&context);	require_noerr(status, CantGetEventParameter);		// Draw the outer oval in the left portion of the window    r.size.height = 210;    r.origin.x = 20;    r.origin.y = 20;    r.size.width = 210;    frameOval(context, r);		// Draw the inner oval in the left portion of the window    r.size.height = 145;    r.origin.x = 75;    r.origin.y = 55;    r.size.width = 100;    frameOval(context, r);	    /* Set the fill color to green. */    CGContextSetRGBFillColor(context, 0, 1, 0, 1);		// Draw and fill the outter oval in the right portion of the window    r.size.height = 210;    r.origin.x = 270;    r.origin.y = 20;    r.size.width = 210;    paintOval(context, r);	    /* Set the fill color to yellow. */    CGContextSetRGBFillColor(context, 1, 1, 0, 1);		// Draw and fill the inner oval in the right portion of the window    r.size.height = 145;    r.origin.x = 325;    r.origin.y = 55;    r.size.width = 100;    paintOval(context, r);CantCallNextEventHandler:CantGetEventParameter:				return status;}

//------------------------------------------------------------------------pascal OSStatus DoWindowClose (EventHandlerCallRef nextHandler, EventRef theEvent, void* userData){	userData;		QuitApplicationEventLoop ();	return CallNextEventHandler (nextHandler, theEvent);}

pascal OSStatus quit_event_handler(EventHandlerCallRef call_ref, EventRef event, void *ignore)                 {  OSStatus err;  err = CallNextEventHandler(call_ref, event);  if(err == noErr) {    g_quit_seen = 1;  }  return err;}

static OSStatus infoEvtHandler(EventHandlerCallRef nextHdlr, EventRef thisEvt, void *pvUserData){    if ( (kEventClassWindow != GetEventClass(thisEvt)) ||         (kEventWindowClose != GetEventKind(thisEvt)) )    {        return CallNextEventHandler(nextHdlr, thisEvt);    }    HideWindow(g_refInfoWin);    g_bVisible = false;    return noErr;}

OSStatus QuartzWindow::handle_event(EventHandlerCallRef handler_call_chain, EventRef e) {  put_event(e);   // Hack: if this is a user-level window (not SPY) and if it is window-close,  // must leave it for Self, otherwise let standard handler do it  if ( myContext == NULL  &&  GetEventClass  &&   GetEventClass(e) == kEventClassWindow   &&   GetEventKind(e)  == kEventWindowClose )    return noErr;  return CallNextEventHandler(handler_call_chain, e);   // In future, could return either eventNotHandledErr or noErr}

// --------------------------------------------------------------------------------------static pascal OSStatus listBoxControlEventHandler(EventHandlerCallRef nextHandler, 													EventRef event, void *prefsDialog){	OSStatus result = eventNotHandledErr;	UInt32 eventClass, eventKind;	DialogRef dialog;	WindowRef dialogWindow;		eventClass = GetEventClass(event);	eventKind = GetEventKind(event);		switch (eventClass)	{		case kEventClassTextInput:			switch (eventKind)			{				case kEventTextInputUnicodeForKeyEvent:						/* The strategy here is to first let the default handler handle 						   the event (i.e. change the selected cell in the category list 						   box control), then react to that change by showing the 						   correct category panel.  However the key pressed could 						   potentially cause the default or cancel button to get hit.  						   In this case, our window handler will be called which will 						   dispose of the dialog.  If this is the case, we need to not 						   postprocess the event.  We will test for this by getting the 						   dialog's window, retaining it, calling the default handler, 						   then getting the window's retain count.  If the retain count 						   is back to 1, then we know the dialog is already disposed. */					dialog = (DialogRef)prefsDialog;					dialogWindow = GetDialogWindow(dialog);					RetainWindow(dialogWindow);		// hold onto the dialog's window										result = CallNextEventHandler(nextHandler, event);					if (result == noErr)	// we don't need to postprocess if nothing happened					{						ItemCount retainCount;												retainCount = GetWindowRetainCount(dialogWindow);						if (retainCount > 1)		// if we're the last one holding the window							handleDialogItemHit(dialog, iIconList);		// then there's no 					}			// need to postprocess anything because it's about to go away										ReleaseWindow(dialogWindow);					break;			}			break;	}		return result;}

//------------------------------------------------------------------------pascal OSStatus DoWindowDrawContent (EventHandlerCallRef nextHandler, EventRef theEvent, void* userData){    platform_support * app = reinterpret_cast<platform_support*>(userData);    if(app)    {        if(app->m_specific->m_redraw_flag)        {            app->on_draw();            app->m_specific->m_redraw_flag = false;        }        app->m_specific->display_pmap(app->m_specific->m_window, &app->rbuf_window());    }	return CallNextEventHandler (nextHandler, theEvent);}

static OSStatus EventHandler(EventHandlerCallRef next_handler, EventRef event, void* p){	switch (GetEventClass(event))	{		case kEventClassWindow:		{			switch (GetEventKind(event))			{				case kEventWindowClose:					Shell::RequestExit();					break;			}		}		break;	}//	InputMacOSX::ProcessCarbonEvent(event);	return CallNextEventHandler(next_handler, event);}

//default keyboard event handlerstatic OSStatus KeyEventHandler(EventHandlerCallRef nextHandler, EventRef event, void *userData){    OSStatus result = noErr;	UInt32 class = GetEventClass (event);	UInt32 kind = GetEventKind (event); 	result = CallNextEventHandler(nextHandler, event);		if(class == kEventClassKeyboard)	{		char macCharCodes;		UInt32 macKeyCode;		UInt32 macKeyModifiers;			GetEventParameter(event, kEventParamKeyMacCharCodes, typeChar, NULL, sizeof(macCharCodes), NULL, &macCharCodes);		GetEventParameter(event, kEventParamKeyCode, typeUInt32, NULL, sizeof(macKeyCode), NULL, &macKeyCode);		GetEventParameter(event, kEventParamKeyModifiers, typeUInt32, NULL, sizeof(macKeyModifiers), NULL, &macKeyModifiers);				if(macKeyModifiers != 256)		{			if (kind == kEventRawKeyRepeat || kind == kEventRawKeyDown)			{				int key = convert_key(macKeyCode, macCharCodes);				if(key != -1)					mplayer_put_key(key);			}		}		else if(macKeyModifiers == 256)		{			switch(macCharCodes)			{				case '[': SetWindowAlpha(theWindow, winAlpha-=0.05); break;				case ']': SetWindowAlpha(theWindow, winAlpha+=0.05); break;					}			}		else			result = eventNotHandledErr;	}	    return result;}

pascal OSStatusCOSXScreen::userSwitchCallback(EventHandlerCallRef nextHandler,								EventRef theEvent,								void* inUserData){	COSXScreen* screen = (COSXScreen*)inUserData;	UInt32 kind        = GetEventKind(theEvent);	IEventQueue* events = screen->getEvents();	if (kind == kEventSystemUserSessionDeactivated) {		LOG((CLOG_DEBUG "user session deactivated"));		events->addEvent(CEvent(events->forIScreen().suspend(),									screen->getEventTarget()));	}	else if (kind == kEventSystemUserSessionActivated) {		LOG((CLOG_DEBUG "user session activated"));		events->addEvent(CEvent(events->forIScreen().resume(),									screen->getEventTarget()));	}	return (CallNextEventHandler(nextHandler, theEvent));}

/*	Handle the messages necessary for creating the custom StarMenuFame	class.*/OSStatus HandleStarFrameObjectEvents(	EventHandlerCallRef inCallRef,	EventRef inEvent,	StarFrameData* frameData){	OSStatus err = eventNotHandledErr;	switch ( GetEventKind( inEvent ) ) {		case kEventHIObjectConstruct:			frameData = (StarFrameData *) calloc(1, sizeof(StarFrameData));			frameData->menu = NULL;			GetEventParameter(inEvent, kEventParamHIObjectInstance, typeHIObjectRef, NULL, sizeof( frameData->hiSelf ), NULL, &frameData->hiSelf );			// This important step actually associates our frameData with the view being initialized			SetEventParameter(inEvent, kEventParamHIObjectInstance, typeVoidPtr, sizeof( frameData ), &frameData );			err = noErr;		break;		case kEventHIObjectInitialize:			err = CallNextEventHandler( inCallRef, inEvent );			if ( err == noErr ) {				GetEventParameter(inEvent, kEventParamMenuRef, typeMenuRef, NULL, sizeof(frameData->menu), NULL, &frameData->menu);				GetEventParameter(inEvent, kEventParamMenuType, typeThemeMenuType, NULL, sizeof( frameData->menuType ), NULL, &frameData->menuType );			}			err = noErr;		break;		case kEventHIObjectDestruct:			free( (void*) frameData );			err = noErr;		break;		default:		break;	}	return err;}

//------------------------------------------------------------------------pascal OSStatus DoKeyUp (EventHandlerCallRef nextHandler, EventRef theEvent, void* userData){	char key_code;	UInt32 modifier;		GetEventParameter (theEvent, kEventParamKeyMacCharCodes, typeChar, NULL, sizeof(char), NULL, &key_code);	GetEventParameter (theEvent, kEventParamKeyModifiers, typeUInt32, NULL, sizeof(UInt32), NULL, &modifier);	platform_support * app = reinterpret_cast<platform_support*>(userData);    app->m_specific->m_last_translated_key = 0;    switch(modifier)     {        case controlKey:            app->m_specific->m_input_flags &= ~kbd_ctrl;            break;        case shiftKey:            app->m_specific->m_input_flags &= ~kbd_shift;            break;    }    	return CallNextEventHandler (nextHandler, theEvent);}

//------------------------------------------------------------------------pascal OSStatus DoKeyDown (EventHandlerCallRef nextHandler, EventRef theEvent, void* userData){	char key_code;	UInt32 modifier;		GetEventParameter (theEvent, kEventParamKeyMacCharCodes, typeChar, NULL, sizeof(char), NULL, &key_code);	GetEventParameter (theEvent, kEventParamKeyModifiers, typeUInt32, NULL, sizeof(UInt32), NULL, &modifier);	platform_support * app = reinterpret_cast<platform_support*>(userData);	app->m_specific->m_last_translated_key = 0;    switch(modifier)     {        case controlKey:            app->m_specific->m_input_flags |= kbd_ctrl;            break;        case shiftKey:            app->m_specific->m_input_flags |= kbd_shift;            break;        default:            app->m_specific->translate(key_code);            break;    }    if(app->m_specific->m_last_translated_key)    {        bool left  = false;        bool up    = false;        bool right = false;        bool down  = false;        switch(app->m_specific->m_last_translated_key)        {        case key_left:            left = true;            break;        case key_up:            up = true;            break;        case key_right:            right = true;            break;        case key_down:            down = true;            break;		//On a Mac, screenshots are handled by the system.        case key_f2:                                    app->copy_window_to_img(agg::platform_support::max_images - 1);            app->save_img(agg::platform_support::max_images - 1, "screenshot");            break;        }        if(app->m_ctrls.on_arrow_keys(left, right, down, up))        {            app->on_ctrl_change();            app->force_redraw();        }        else        {            app->on_key(app->m_specific->m_cur_x,                        app->m_specific->m_cur_y,                        app->m_specific->m_last_translated_key,                        app->m_specific->m_input_flags);        }    }	return CallNextEventHandler (nextHandler, theEvent);}

OSStatus CL_DisplayWindow_OpenGL::on_window_event(EventHandlerCallRef call_ref, EventRef event_ref, void *user_data){	CL_DisplayWindow_OpenGL *self = (CL_DisplayWindow_OpenGL *) user_data;	OSStatus result = CallNextEventHandler(call_ref, event_ref);	UInt32 event_class = GetEventClass(event_ref);	UInt32 event_kind = GetEventKind(event_ref);		if (event_class == kEventClassKeyboard)	{		Point mouse_pos;		UInt32 key_modifiers = 0;		UInt32 click_count = 0;		UInt32 key_code = 0;                		// Todo:		// KeyboardLayoutRef layout;		// KLGetCurrentKeyboardLayout(&layout);		// KLGetKeyboardLayoutProperty(layout, kKLuchrData, &data);		// call UCKeyTranslate to get unicode string for keys being pressed.		GetMouse(&mouse_pos);		GetEventParameter(event_ref, kEventParamKeyModifiers, typeUInt32, 0, sizeof(UInt32), 0, &key_modifiers);		GetEventParameter(event_ref, kEventParamKeyCode, typeUInt32, 0, sizeof(UInt32), 0, &key_code);		GetEventParameter(event_ref, kEventParamClickCount, typeUInt32, 0, sizeof(UInt32), 0, &click_count);		if (!self->fullscreen) {			Rect wbounds;			GetWindowBounds(self->window_ref, kWindowContentRgn, &wbounds);			mouse_pos.h -= wbounds.left;			mouse_pos.v -= wbounds.top;		}		static unsigned long state = 0;		static Ptr keymap = nil;		Ptr new_keymap;		// Get the current keyboard map resource		new_keymap = (Ptr)GetScriptManagerVariable(smKCHRCache);		if (new_keymap != keymap)		{			keymap = new_keymap;			state = 0;		}		CL_InputEvent event;		event.str = KeyTranslate(keymap, key_code|key_modifiers, &state) & 0xffff;		event.device = self->keyboard;		event.mouse_pos = CL_Point(mouse_pos.h, mouse_pos.v);		event.repeat_count = click_count;		self->mouse_pos = event.mouse_pos; // if kEventParamMouseLocation is not valid here, reverse this.				switch (event_kind)		{		case kEventRawKeyModifiersChanged:			{				std::set<int> current_keys = modifiercode_to_clkeys(key_modifiers);				for (std::set<int>::iterator i=current_keys.begin(); i!=current_keys.end(); i++)				{					if (!self->prev_modifier_keys.count(*i))					{						event.id = *i;						event.type = CL_InputEvent::pressed;						self->keyboard.sig_key_down().call(event);					}				}				for (std::set<int>::iterator i=self->prev_modifier_keys.begin(); i!=self->prev_modifier_keys.end(); i++)				{					if (!current_keys.count(*i))					{						event.id = *i;						event.type = CL_InputEvent::released;						self->keyboard.sig_key_up().call(event);					}				}				self->prev_modifier_keys = current_keys;				return noErr;			}				case kEventRawKeyDown:			// first tests for cmd-q(12) or cmd-w(13) to close the window if needed			if ((key_modifiers & cmdKey) && (key_code==12 || key_code==13))			{				EventRef close_event;				CreateEvent(NULL, kEventClassWindow, kEventWindowClose, 0, kEventAttributeNone, &close_event);				EventTargetRef target = GetWindowEventTarget(self->window_ref);				SendEventToEventTarget(close_event, target);				return noErr;			}			else			{				event.id = keycode_to_clkey(key_code);				event.type = CL_InputEvent::pressed;				self->keyboard.sig_key_down().call(event);				return noErr;			}					case kEventRawKeyRepeat://.........这里部分代码省略.........

static pascal OSStatus windowEventHandler(EventHandlerCallRef nextHandler, EventRef theEvent, void *inUserData){    CvWindow* window = NULL;    UInt32 eventKind, eventClass;    OSErr err = noErr;    int event = 0;    UInt32 count = 0;    HIPoint point = {0,0};    EventMouseButton eventMouseButton = 0;//FD    UInt32 modifiers;//FD        WindowRef theWindow = (WindowRef)inUserData;    if (theWindow == NULL)        return eventNotHandledErr;    window = icvWindowByHandle(theWindow);    if ( window == NULL)        return eventNotHandledErr;        eventKind = GetEventKind(theEvent);    eventClass = GetEventClass(theEvent);            switch (eventClass) {    case kEventClassMouse : {        switch (eventKind){        case kEventMouseUp :        case kEventMouseDown :         case kEventMouseMoved : {            err = CallNextEventHandler(nextHandler, theEvent);            if (err != eventNotHandledErr)                return err;            err = GetEventParameter(theEvent, kEventParamMouseButton, typeMouseButton, NULL, sizeof(eventMouseButton), NULL, &eventMouseButton);            err = GetEventParameter(theEvent, kEventParamKeyModifiers, typeUInt32, NULL, sizeof(modifiers), NULL, &modifiers);            err = GetEventParameter(theEvent,kEventParamClickCount,typeUInt32,NULL,sizeof(UInt32),NULL,&count);            if (err == noErr){                if (count >1) event += 6;            } else {                event = CV_EVENT_MOUSEMOVE;            }                        if (eventKind == kEventMouseUp)                event +=4;            if (eventKind == kEventMouseDown)                event +=1;                        err = GetEventParameter(theEvent, kEventParamWindowMouseLocation, typeHIPoint, NULL, sizeof(point), NULL, &point);            if (eventKind != kEventMouseMoved){                switch(eventMouseButton){                    case kEventMouseButtonPrimary:                        if (modifiers & controlKey) /* ctrl-click for right button */                            event += 1;                        break;                    case kEventMouseButtonSecondary:                        event += 1;                        break;                    case kEventMouseButtonTertiary:                        event += 2;                        break;                }            }            int c = icvCountTrackbarInWindow(window);                        if (window->on_mouse != NULL){                int lx,ly;                Rect structure, content;                GetWindowBounds(theWindow, kWindowStructureRgn, &structure);                GetWindowBounds(theWindow, kWindowContentRgn, &content);                lx = point.x - content.left + structure.left;                ly = point.y - window->trackbarheight  - content.top + structure.top; /* minus la taille des trackbars */                if (window->flags & CV_WINDOW_AUTOSIZE) {//FD                                                         //printf("was %d,%d/n", lx, ly);                    /* scale the mouse coordinates */                    lx = lx * window->imageWidth / (content.right - content.left);                    ly = ly * window->imageHeight / (content.bottom - content.top - window->trackbarheight);                    //printf("now %d,%d/n", lx, ly);                }                //fprintf(stdout,"final OpenCV event is %d/n",event);                //fprintf(stdout,"event @ %d %d which is localy %d %d offset of %d/n",point.h, point.v ,lx,ly,yOffset);                if (lx>0 && ly >0){ /* a remettre dans les coordonn
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