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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Carbon/index.html">Carbon</a> > <a href="../../samplecode/Carbon/idxAccessibility-date.html">Accessibility</a> > <A HREF="javascript:location.replace('index.html');">ImageMapView</A> >
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<h2>/HIFramework/TObject.cp</h2>
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<p><strong>View Source Code:</strong>
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<option value="listing1.html">/HIFramework/HIFramework.h</option>
<option value="listing2.html">/HIFramework/TCarbonEvent.cp</option>
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<option value="listing4.html">/HIFramework/TEventHandler.cp</option>
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<option value="listing6.html">/HIFramework/TObject.cp</option>
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<p><strong><a href="ImageMapView.zip">Download Sample</a></strong> (“ImageMapView.zip”, 277.8K)<BR>
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<!--googleon: index -->
<pre class="sourcecodebox">/*
File: TObject.cp
Version: 1.1
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
("Apple") in consideration of your agreement to the following terms, and your
use, installation, modification or redistribution of this Apple software
constitutes acceptance of these terms. If you do not agree with these terms,
please do not use, install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject
to these terms, Apple grants you a personal, non-exclusive license, under Apple's
copyrights in this original Apple software (the "Apple Software"), to use,
reproduce, modify and redistribute the Apple Software, with or without
modifications, in source and/or binary forms; provided that if you redistribute
the Apple Software in its entirety and without modifications, you must retain
this notice and the following text and disclaimers in all such redistributions of
the Apple Software. Neither the name, trademarks, service marks or logos of
Apple Computer, Inc. may be used to endorse or promote products derived from the
Apple Software without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or implied,
are granted by Apple herein, including but not limited to any patent rights that
may be infringed by your derivative works or by other works in which the Apple
Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
(INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Copyright © 2000-2005 Apple Computer, Inc., All Rights Reserved
*/
#include "TObject.h"
#include "TCarbonEvent.h"
//-----------------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------------
//
static const EventTypeSpec kHIObjectEvents[] =
{
{ kEventClassHIObject, kEventHIObjectConstruct },
{ kEventClassHIObject, kEventHIObjectInitialize },
{ kEventClassHIObject, kEventHIObjectDestruct },
{ kEventClassHIObject, kEventHIObjectPrintDebugInfo }
};
//-----------------------------------------------------------------------------------
// TObject HIObjectRef constructor
//-----------------------------------------------------------------------------------
//
TObject::TObject(
HIObjectRef inObject )
{
fObjectRef = inObject;
}
//-----------------------------------------------------------------------------------
// TObject destructor
//-----------------------------------------------------------------------------------
//
TObject::~TObject()
{
}
//-----------------------------------------------------------------------------------
// Initialize
//-----------------------------------------------------------------------------------
// Perform any initialization work.
//
OSStatus
TObject::Initialize(
TCarbonEvent& inEvent )
{
return noErr;
}
//-----------------------------------------------------------------------------------
// PrintDebugInfoSelf
//-----------------------------------------------------------------------------------
// Prints debugging info specific to this object. Subclasses should call the
// inherited method at the end of handling this so that superclass debugging info
// also gets printed out.
//
void
TObject::PrintDebugInfoSelf()
{
fprintf( stdout, "TObject\n" );
}
//-----------------------------------------------------------------------------------
// RegisterSubclass
//-----------------------------------------------------------------------------------
// This routine should be called by subclasses so they can be created as HIObjects.
//
OSStatus
TObject::RegisterSubclass(
CFStringRef inID,
CFStringRef inBaseID,
ConstructProc inProc )
{
return HIObjectRegisterSubclass( inID, inBaseID, 0, ObjectEventHandler,
GetEventTypeCount( kHIObjectEvents ), kHIObjectEvents, (void*) inProc, NULL );
}
//-----------------------------------------------------------------------------------
// CreateInitializationEvent
//-----------------------------------------------------------------------------------
// Create a basic intialization event.
//
EventRef
TObject::CreateInitializationEvent()
{
OSStatus result = noErr;
EventRef event;
result = CreateEvent( NULL, kEventClassHIObject, kEventHIObjectInitialize,
GetCurrentEventTime(), 0, &event );
require_noerr_action( result, CantCreateEvent, event = NULL );
CantCreateEvent:
return event;
}
//-----------------------------------------------------------------------------------
// ObjectEventHandler
//-----------------------------------------------------------------------------------
// Our static event handler proc. We handle any HIObject based events directly in
// here at present. This handler is only called by the non-Event system dispatch
// of HIObject creation/destruction.
//
OSStatus
TObject::ObjectEventHandler(
EventHandlerCallRef inCallRef,
EventRef inEvent,
void* inUserData )
{
OSStatus result = eventNotHandledErr;
TObject* instance = (TObject*) inUserData;
TCarbonEvent event( inEvent );
switch ( event.GetClass() )
{
case kEventClassHIObject:
switch ( event.GetKind() )
{
case kEventHIObjectConstruct:
{
HIObjectRef object;
result = event.GetParameter<HIObjectRef>( kEventParamHIObjectInstance,
typeHIObjectRef, &object );
require_noerr( result, ParameterMissing );
// on entry for our construct event, we're passed the
// creation proc we registered with for this class.
// we use it now to create the instance, and then we
// replace the instance parameter data with said instance
// as type void.
result = (*(ConstructProc)inUserData)( object, &instance );
if ( result == noErr )
{
event.SetParameter<TObject*>( kEventParamHIObjectInstance,
typeVoidPtr, instance );
}
}
break;
case kEventHIObjectInitialize:
result = CallNextEventHandler( inCallRef, inEvent );
if ( result == noErr )
result = instance->Initialize( event );
break;
case kEventHIObjectPrintDebugInfo:
instance->PrintDebugInfoSelf();
// don't set result, let it propagate
break;
case kEventHIObjectDestruct:
delete instance;
// result is unimportant
break;
}
break;
}
ParameterMissing:
return result;
}
//-----------------------------------------------------------------------------------
// HandleEvent
//-----------------------------------------------------------------------------------
// Per-instance event handler. Override this method to handle additional events.
// From the overridden method, be sure to call this superclass method.
//
OSStatus
TObject::HandleEvent(
EventHandlerCallRef inCallRef,
TCarbonEvent& inEvent )
{
OSStatus result = eventNotHandledErr;
switch ( inEvent.GetClass() )
{
case kEventClassAccessibility:
{
AXUIElementRef element;
UInt64 identifier;
result = inEvent.GetParameter<AXUIElementRef>( kEventParamAccessibleObject, typeCFTypeRef, &element );
require_noerr( result, ParameterMissing );
AXUIElementGetIdentifier( element, &identifier );
switch ( inEvent.GetKind() )
{
case kEventAccessibleGetChildAtPoint:
{
CFTypeRef child = NULL;
HIPoint where;
result = inEvent.GetParameter<HIPoint>( kEventParamMouseLocation, typeHIPoint, &where );
require_noerr( result, ParameterMissing );
result = CopyAccessibleChildAtPoint( inCallRef, inEvent, element, identifier, where, &child );
if ( result == noErr && child != NULL )
result = inEvent.SetParameter<CFTypeRef>( kEventParamAccessibleChild, typeCFTypeRef, child );
}
break;
case kEventAccessibleGetFocusedChild:
{
CFTypeRef child = NULL;
result = CopyAccessibleFocusedChild( inCallRef, inEvent, element, identifier, &child );
if ( result == noErr && child != NULL )
result = inEvent.SetParameter<CFTypeRef>( kEventParamAccessibleChild, typeCFTypeRef, child );
}
break;
case kEventAccessibleGetAllAttributeNames:
{
CFMutableArrayRef namesArray;
result = inEvent.GetParameter<CFMutableArrayRef>( kEventParamAccessibleAttributeNames,
typeCFMutableArrayRef, &namesArray );
require_noerr( result, ParameterMissing );
result = GetAccessibleAttributeNames( inCallRef, inEvent, element, identifier, namesArray );
}
break;
case kEventAccessibleGetAllParameterizedAttributeNames:
{
CFMutableArrayRef namesArray;
result = inEvent.GetParameter<CFMutableArrayRef>( kEventParamAccessibleAttributeNames,
typeCFMutableArrayRef, &namesArray );
require_noerr( result, ParameterMissing );
result = GetAccessibleParameterizedAttributeNames( inCallRef, inEvent, element, identifier, namesArray );
}
break;
case kEventAccessibleGetNamedAttribute:
{
CFStringRef attribute;
result = inEvent.GetParameter<CFStringRef>( kEventParamAccessibleAttributeName,
typeCFStringRef, &attribute );
require_noerr( result, ParameterMissing );
result = GetAccessibleNamedAttribute( inCallRef, inEvent, element, identifier, attribute );
}
break;
case kEventAccessibleSetNamedAttribute:
{
CFStringRef attribute;
result = inEvent.GetParameter<CFStringRef>( kEventParamAccessibleAttributeName,
typeCFStringRef, &attribute );
require_noerr( result, ParameterMissing );
result = SetAccessibleNamedAttribute( inCallRef, inEvent, element, identifier, attribute );
}
break;
case kEventAccessibleIsNamedAttributeSettable:
{
CFStringRef attribute;
Boolean isSettable;
result = inEvent.GetParameter<CFStringRef>( kEventParamAccessibleAttributeName,
typeCFStringRef, &attribute );
require_noerr( result, ParameterMissing );
result = IsAccessibleNamedAttributeSettable( inCallRef, inEvent, element, identifier, attribute, &isSettable );
inEvent.SetParameter( kEventParamAccessibleAttributeSettable, isSettable );
}
break;
case kEventAccessibleGetAllActionNames:
{
CFMutableArrayRef array;
result = inEvent.GetParameter<CFMutableArrayRef>( kEventParamAccessibleActionNames,
typeCFMutableArrayRef, &array );
require_noerr( result, ParameterMissing );
result = GetAccessibleActionNames( inCallRef, inEvent, element, identifier, array );
}
break;
case kEventAccessibleGetNamedActionDescription:
{
CFStringRef action;
CFMutableStringRef desc;
CFStringRef selfDesc = NULL;
result = inEvent.GetParameter<CFStringRef>( kEventParamAccessibleActionName,
typeCFStringRef, &action );
require_noerr( result, ParameterMissing );
result = inEvent.GetParameter<CFMutableStringRef>( kEventParamAccessibleActionDescription,
typeCFMutableStringRef, &desc );
require_noerr( result, ParameterMissing );
result = CopyAccessibleNamedActionDescription( inCallRef, inEvent, element, identifier, action, &selfDesc );
CFStringReplaceAll( desc, selfDesc );
CFRelease( selfDesc );
}
break;
case kEventAccessiblePerformNamedAction:
{
CFStringRef action;
result = inEvent.GetParameter<CFStringRef>( kEventParamAccessibleActionName,
typeCFStringRef, &action );
require_noerr( result, ParameterMissing );
result = PerformAccessibleNamedAction( inCallRef, inEvent, element, identifier, action );
}
break;
}
}
break;
}
ParameterMissing:
return result;
}
//-----------------------------------------------------------------------------------
// ActivateInterface
//-----------------------------------------------------------------------------------
// This routine is used to allow a subclass to turn on a specific event or suite of
// events. This allows us to keep event traffic down if we are not interested, but
// register for the events if we are.
//
OSStatus
TObject::ActivateInterface(
UInt32 inInterface )
{
OSStatus result = paramErr;
switch( inInterface )
{
case kAccessibility:
{
static const EventTypeSpec kAccessibilityEvents[] =
{
{ kEventClassAccessibility, kEventAccessibleGetChildAtPoint },
{ kEventClassAccessibility, kEventAccessibleGetFocusedChild },
{ kEventClassAccessibility, kEventAccessibleGetAllAttributeNames },
{ kEventClassAccessibility, kEventAccessibleGetAllParameterizedAttributeNames },
{ kEventClassAccessibility, kEventAccessibleGetNamedAttribute },
{ kEventClassAccessibility, kEventAccessibleSetNamedAttribute },
{ kEventClassAccessibility, kEventAccessibleIsNamedAttributeSettable },
{ kEventClassAccessibility, kEventAccessibleGetAllActionNames },
{ kEventClassAccessibility, kEventAccessibleGetNamedActionDescription },
{ kEventClassAccessibility, kEventAccessiblePerformNamedAction },
};
result = AddEventTypesToHandler( GetEventHandler(), GetEventTypeCount( kAccessibilityEvents ),
kAccessibilityEvents );
}
break;
}
return result;
}
//-----------------------------------------------------------------------------------
// CopyAccessibleChildAtPoint
//-----------------------------------------------------------------------------------
// Read CarbonEvents.h in the kEventAccessibleGetChildAtPoint section to
// see how to override this method.
//
OSStatus
TObject::CopyAccessibleChildAtPoint(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
const HIPoint& inWhere,
CFTypeRef* outChild )
{
return eventNotHandledErr;
}
//-----------------------------------------------------------------------------------
// CopyAccessibleFocusedChild
//-----------------------------------------------------------------------------------
// Read CarbonEvents.h in the kEventAccessibleGetFocusedChild section to
// see how to override this method.
//
OSStatus
TObject::CopyAccessibleFocusedChild(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFTypeRef* outChild )
{
return eventNotHandledErr;
}
//-----------------------------------------------------------------------------------
// GetAccessibleAttributeNames
//-----------------------------------------------------------------------------------
// Read CarbonEvents.h in the kEventAccessibleGetAllAttributeNames section to
// see how to override this method.
//
OSStatus
TObject::GetAccessibleAttributeNames(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFMutableArrayRef outNames )
{
return eventNotHandledErr;
}
//-----------------------------------------------------------------------------------
// GetAccessibleParameterizedAttributeNames
//-----------------------------------------------------------------------------------
// Read CarbonEvents.h in the kEventAccessibleGetAllParameterizedAttributeNames
// section to see how to override this method.
//
OSStatus
TObject::GetAccessibleParameterizedAttributeNames(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFMutableArrayRef outNames )
{
return eventNotHandledErr;
}
//-----------------------------------------------------------------------------------
// GetAccessibleNamedAttribute
//-----------------------------------------------------------------------------------
// Read CarbonEvents.h in the kEventAccessibleGetNamedAttribute section to
// see how to override this method.
//
OSStatus
TObject::GetAccessibleNamedAttribute(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inAttribute )
{
return eventNotHandledErr;
}
//-----------------------------------------------------------------------------------
// SetAccessibleNamedAttribute
//-----------------------------------------------------------------------------------
// Read CarbonEvents.h in the kEventAccessibleSetNamedAttribute section to
// see how to override this method.
//
OSStatus
TObject::SetAccessibleNamedAttribute(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inAttribute )
{
return eventNotHandledErr;
}
//-----------------------------------------------------------------------------------
// IsAccessibleNamedAttributeSettable
//-----------------------------------------------------------------------------------
// Read CarbonEvents.h in the kEventAccessibleIsNamedAttributeSettable section to
// see how to override this method.
//
OSStatus
TObject::IsAccessibleNamedAttributeSettable(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inName,
Boolean* outIsSettable )
{
return eventNotHandledErr;
}
//-----------------------------------------------------------------------------------
// GetAccessibleActionNames
//-----------------------------------------------------------------------------------
// Read CarbonEvents.h in the kEventAccessibleGetAllActionNames section to
// see how to override this method.
//
OSStatus
TObject::GetAccessibleActionNames(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFMutableArrayRef outNames )
{
return eventNotHandledErr;
}
//-----------------------------------------------------------------------------------
// CopyAccessibleNamedActionDescription
//-----------------------------------------------------------------------------------
// Read CarbonEvents.h in the kEventAccessibleGetNamedActionDescription section to
// see how to override this method.
//
OSStatus
TObject::CopyAccessibleNamedActionDescription(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inName,
CFStringRef* outDescription )
{
return eventNotHandledErr;
}
//-----------------------------------------------------------------------------------
// PerformAccessibleNamedAction
//-----------------------------------------------------------------------------------
// Read CarbonEvents.h in the kEventAccessiblePerformNamedAction section to
// see how to override this method.
//
OSStatus
TObject::PerformAccessibleNamedAction(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inName )
{
return eventNotHandledErr;
}
</pre>
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