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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkObject.cxx.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:43 $ |
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Version: $Revision: 1.4 $ |
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Copyright (c) Insight Software Consortium. All rights reserved. |
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See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. |
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Portions of this code are covered under the VTK copyright. |
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See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.htm for details. |
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This software is distributed WITHOUT ANY WARRANTY; without even |
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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*****PURPOSE. See the above copyright notices for more information. |
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DEF |
=========================================================================*/ |
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#include "itkObject.h" |
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#include "itkObjectFactory.h" |
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#include "itkCommand.h" |
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namespace itk |
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{ |
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/** |
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* Initialize static member that controls warning display. |
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*/ |
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bool Object::m_GlobalWarningDisplay = true; |
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|
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class Observer |
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{ |
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public: |
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Observer(Command* c, |
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const EventObject * event, |
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unsigned long tag) :m_Command(c), |
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IND |
*******************************m_Event(event), |
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*******************************m_Tag(tag) |
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**{ } |
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virtual ~Observer() |
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IVP,IND |
**{ delete m_Event; } |
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IVP |
Command::Pointer m_Command; |
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IVP |
const EventObject * m_Event; |
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IVP |
unsigned long m_Tag; |
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}; |
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|
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class SubjectImplementation |
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{ |
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public: |
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SubjectImplementation() {m_Count = 0;} |
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~SubjectImplementation(); |
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unsigned long AddObserver(const EventObject & event, Command* cmd); |
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unsigned long AddObserver(const EventObject & event, Command* cmd) const; |
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void RemoveObserver(unsigned long tag); |
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void RemoveAllObservers(); |
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void InvokeEvent( const EventObject & event, Object* self); |
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void InvokeEvent( const EventObject & event, const Object* self); |
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Command *GetCommand(unsigned long tag); |
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bool HasObserver(const EventObject & event) const; |
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bool PrintObservers(std::ostream& os, Indent indent) const; |
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private: |
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std::list<Observer* > m_Observers; |
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unsigned long m_Count; |
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}; |
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|
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SubjectImplementation:: |
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~SubjectImplementation() |
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{ |
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for(std::list<Observer* >::iterator i = m_Observers.begin(); |
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IND |
******i != m_Observers.end(); ++i) |
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{ |
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delete (*i); |
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} |
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} |
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|
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unsigned long |
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SubjectImplementation:: |
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AddObserver(const EventObject & event, |
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Command* cmd) |
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{ |
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Observer* ptr = new Observer(cmd, event.MakeObject(), m_Count); |
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m_Observers.push_back(ptr); |
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m_Count++; |
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return ptr->m_Tag; |
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} |
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|
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|
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unsigned long |
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SubjectImplementation:: |
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AddObserver(const EventObject & event, |
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Command* cmd) const |
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{ |
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Observer* ptr = new Observer(cmd, event.MakeObject(), m_Count); |
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SubjectImplementation * me = const_cast<SubjectImplementation *>( this ); |
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me->m_Observers.push_back(ptr); |
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me->m_Count++; |
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return ptr->m_Tag; |
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} |
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|
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void |
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SubjectImplementation:: |
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RemoveObserver(unsigned long tag) |
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{ |
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for(std::list<Observer* >::iterator i = m_Observers.begin(); |
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IND |
******i != m_Observers.end(); ++i) |
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{ |
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if((*i)->m_Tag == tag) |
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{ |
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delete (*i); |
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m_Observers.erase(i); |
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return; |
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} |
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} |
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} |
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void |
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SubjectImplementation:: |
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RemoveAllObservers() |
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{ |
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for(std::list<Observer* >::iterator i = m_Observers.begin(); |
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IND |
******i != m_Observers.end(); ++i) |
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{ |
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delete (*i); |
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} |
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m_Observers.clear(); |
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} |
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void |
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SubjectImplementation:: |
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InvokeEvent( const EventObject & event, |
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Object* self) |
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{ |
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for(std::list<Observer* >::iterator i = m_Observers.begin(); |
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******i != m_Observers.end(); ++i) |
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{ |
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const EventObject * e = (*i)->m_Event; |
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if(e->CheckEvent(&event)) |
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{ |
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(*i)->m_Command->Execute(self, event); |
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} |
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} |
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} |
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void |
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SubjectImplementation:: |
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InvokeEvent( const EventObject & event, |
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const Object* self) |
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{ |
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for(std::list<Observer* >::iterator i = m_Observers.begin(); |
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IND |
******i != m_Observers.end(); ++i) |
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{ |
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const EventObject * e = (*i)->m_Event; |
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if(e->CheckEvent(&event)) |
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{ |
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(*i)->m_Command->Execute(self, event); |
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} |
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} |
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} |
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Command* |
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SubjectImplementation:: |
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GetCommand(unsigned long tag) |
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{ |
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for(std::list<Observer* >::iterator i = m_Observers.begin(); |
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******i != m_Observers.end(); ++i) |
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{ |
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if ( (*i)->m_Tag == tag) |
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{ |
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return (*i)->m_Command; |
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} |
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} |
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return 0; |
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} |
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|
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bool |
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SubjectImplementation:: |
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HasObserver(const EventObject & event) const |
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{ |
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for(std::list<Observer* >::const_iterator i = m_Observers.begin(); |
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IND |
******i != m_Observers.end(); ++i) |
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{ |
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const EventObject * e = (*i)->m_Event; |
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if(e->CheckEvent(&event)) |
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{ |
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return true; |
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} |
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} |
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return false; |
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} |
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|
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bool |
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SubjectImplementation:: |
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PrintObservers(std::ostream& os, Indent indent) const |
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{ |
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if(m_Observers.empty()) |
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{ |
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return false; |
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} |
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for(std::list<Observer* >::const_iterator i = m_Observers.begin(); |
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IND |
******i != m_Observers.end(); ++i) |
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{ |
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const EventObject * e = (*i)->m_Event; |
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const Command* c = (*i)->m_Command; |
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os << indent << e->GetEventName() << "(" << c->GetNameOfClass() << ")\n"; |
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} |
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return true; |
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} |
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|
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Object::Pointer |
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Object::New() |
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{ |
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Pointer smartPtr; |
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Object *rawPtr = ::itk::ObjectFactory<Object>::Create(); |
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if(rawPtr == NULL) |
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{ |
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rawPtr = new Object; |
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} |
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smartPtr = rawPtr; |
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rawPtr->UnRegister(); |
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return smartPtr; |
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} |
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|
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LightObject::Pointer |
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Object::CreateAnother() const |
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{ |
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return Object::New().GetPointer(); |
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} |
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/** |
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* Turn debugging output on. |
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*/ |
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void |
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Object |
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::DebugOn() const |
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{ |
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m_Debug = true; |
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} |
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/** |
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* Turn debugging output off. |
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*/ |
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void |
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Object |
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::DebugOff() const |
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{ |
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m_Debug = false; |
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} |
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/** |
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* Get the value of the debug flag. |
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*/ |
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bool |
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Object |
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::GetDebug() const |
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{ |
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return m_Debug; |
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} |
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|
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/** |
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* Set the value of the debug flag. A non-zero value turns debugging on. |
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*/ |
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void |
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Object |
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::SetDebug(bool debugFlag) const |
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{ |
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m_Debug = debugFlag; |
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} |
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/** |
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* Return the modification for this object. |
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*/ |
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unsigned long |
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Object |
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::GetMTime() const |
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{ |
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return m_MTime.GetMTime(); |
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} |
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|
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/** |
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* Make sure this object's modified time is greater than all others. |
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*/ |
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void |
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Object |
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::Modified() const |
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{ |
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m_MTime.Modified(); |
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InvokeEvent( ModifiedEvent() ); |
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} |
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|
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/** |
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* Increase the reference count (mark as used by another object). |
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*/ |
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void |
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Object |
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::Register() const |
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{ |
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itkDebugMacro(<< "Registered, " |
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<< "ReferenceCount = " << (m_ReferenceCount+1)); |
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|
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// call the parent |
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Superclass::Register(); |
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} |
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|
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/** |
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* Decrease the reference count (release by another object). |
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*/ |
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void |
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Object |
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::UnRegister() const |
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{ |
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// call the parent |
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itkDebugMacro(<< "UnRegistered, " |
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<< "ReferenceCount = " << (m_ReferenceCount-1)); |
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|
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if ( (m_ReferenceCount-1) <= 0) |
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{ |
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/** |
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* If there is a delete method, invoke it. |
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*/ |
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this->InvokeEvent(DeleteEvent()); |
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} |
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Superclass::UnRegister(); |
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} |
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|
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|
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/** |
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* Sets the reference count (use with care) |
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*/ |
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void |
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Object |
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::SetReferenceCount(int ref) |
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{ |
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itkDebugMacro(<< "Reference Count set to " << ref); |
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|
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// ReferenceCount in now unlocked. We may have a race condition to |
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// to delete the object. |
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if( ref <= 0 ) |
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{ |
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/** |
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* If there is a delete method, invoke it. |
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*/ |
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this->InvokeEvent(DeleteEvent()); |
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} |
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|
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Superclass::SetReferenceCount(ref); |
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} |
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|
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|
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/** |
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* Set the value of the global debug output control flag. |
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*/ |
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void |
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Object |
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::SetGlobalWarningDisplay(bool val) |
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{ |
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m_GlobalWarningDisplay = val; |
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} |
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|
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|
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/** |
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* Get the value of the global debug output control flag. |
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*/ |
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bool |
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Object |
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::GetGlobalWarningDisplay() |
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{ |
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return m_GlobalWarningDisplay; |
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} |
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|
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|
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unsigned long |
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Object |
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::AddObserver(const EventObject & event, Command *cmd) |
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{ |
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if (!this->m_SubjectImplementation) |
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{ |
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this->m_SubjectImplementation = new SubjectImplementation; |
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} |
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return this->m_SubjectImplementation->AddObserver(event,cmd); |
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} |
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|
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|
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unsigned long |
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Object |
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::AddObserver(const EventObject & event, Command *cmd) const |
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{ |
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if (!this->m_SubjectImplementation) |
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{ |
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Self * me = const_cast<Self *>( this ); |
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me->m_SubjectImplementation = new SubjectImplementation; |
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} |
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return this->m_SubjectImplementation->AddObserver(event,cmd); |
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} |
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|
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|
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|
Command* |
| 413 |
|
Object |
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::GetCommand(unsigned long tag) |
| 415 |
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{ |
| 416 |
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if (this->m_SubjectImplementation) |
| 417 |
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{ |
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|
return this->m_SubjectImplementation->GetCommand(tag); |
| 419 |
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} |
| 420 |
|
return NULL; |
| 421 |
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} |
| 422 |
|
|
| 423 |
|
void |
| 424 |
|
Object |
| 425 |
|
::RemoveObserver(unsigned long tag) |
| 426 |
|
{ |
| 427 |
|
if (this->m_SubjectImplementation) |
| 428 |
|
{ |
| 429 |
|
this->m_SubjectImplementation->RemoveObserver(tag); |
| 430 |
|
} |
| 431 |
|
} |
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|
|
| 433 |
|
void |
| 434 |
|
Object |
| 435 |
|
::RemoveAllObservers() |
| 436 |
|
{ |
| 437 |
|
if (this->m_SubjectImplementation) |
| 438 |
|
{ |
| 439 |
|
this->m_SubjectImplementation->RemoveAllObservers(); |
| 440 |
|
} |
| 441 |
|
} |
| 442 |
|
|
| 443 |
|
|
| 444 |
|
void |
| 445 |
|
Object |
| 446 |
|
::InvokeEvent( const EventObject & event ) |
| 447 |
|
{ |
| 448 |
|
if (this->m_SubjectImplementation) |
| 449 |
|
{ |
| 450 |
|
this->m_SubjectImplementation->InvokeEvent(event,this); |
| 451 |
|
} |
| 452 |
|
} |
| 453 |
|
|
| 454 |
|
|
| 455 |
|
void |
| 456 |
|
Object |
| 457 |
|
::InvokeEvent( const EventObject & event ) const |
| 458 |
|
{ |
| 459 |
|
if (this->m_SubjectImplementation) |
| 460 |
|
{ |
| 461 |
|
this->m_SubjectImplementation->InvokeEvent(event,this); |
| 462 |
|
} |
| 463 |
|
} |
| 464 |
|
|
| 465 |
|
|
| 466 |
EML |
|
| 467 |
EML |
|
| 468 |
|
bool |
| 469 |
|
Object |
| 470 |
|
::HasObserver( const EventObject & event ) const |
| 471 |
|
{ |
| 472 |
|
if (this->m_SubjectImplementation) |
| 473 |
|
{ |
| 474 |
|
return this->m_SubjectImplementation->HasObserver(event); |
| 475 |
|
} |
| 476 |
|
return false; |
| 477 |
|
} |
| 478 |
|
|
| 479 |
|
|
| 480 |
EML |
|
| 481 |
|
bool |
| 482 |
|
Object |
| 483 |
|
::PrintObservers(std::ostream& os, Indent indent) const |
| 484 |
|
{ |
| 485 |
|
if (this->m_SubjectImplementation) |
| 486 |
|
{ |
| 487 |
|
return this->m_SubjectImplementation->PrintObservers(os, indent); |
| 488 |
|
} |
| 489 |
|
return false; |
| 490 |
|
} |
| 491 |
|
|
| 492 |
|
|
| 493 |
EML |
|
| 494 |
|
/** |
| 495 |
|
* Create an object with Debug turned off and modified time initialized |
| 496 |
|
* to the most recently modified object. |
| 497 |
|
*/ |
| 498 |
|
Object |
| 499 |
|
::Object(): |
| 500 |
IND |
**LightObject(), |
| 501 |
IND |
**m_Debug(false), |
| 502 |
IND |
**m_SubjectImplementation(NULL), |
| 503 |
IND |
**m_MetaDataDictionary(NULL) |
| 504 |
|
{ |
| 505 |
|
this->Modified(); |
| 506 |
|
} |
| 507 |
|
|
| 508 |
|
|
| 509 |
|
Object |
| 510 |
|
::~Object() |
| 511 |
|
{ |
| 512 |
|
itkDebugMacro(<< "Destructing!"); |
| 513 |
|
delete m_SubjectImplementation; |
| 514 |
|
delete m_MetaDataDictionary;//Deleteing a NULL pointer does nothing. |
| 515 |
|
} |
| 516 |
|
|
| 517 |
|
|
| 518 |
|
/** |
| 519 |
|
* Chaining method to print an object's instance variables, as well as |
| 520 |
|
* its superclasses. |
| 521 |
|
*/ |
| 522 |
|
void |
| 523 |
|
Object |
| 524 |
|
::PrintSelf(std::ostream& os, Indent indent) const |
| 525 |
|
{ |
| 526 |
|
Superclass::PrintSelf(os, indent); |
| 527 |
|
|
| 528 |
|
os << indent << "Modified Time: " << this->GetMTime() << std::endl; |
| 529 |
|
os << indent << "Debug: " << (m_Debug ? "On\n" : "Off\n"); |
| 530 |
|
os << indent << "Observers: \n"; |
| 531 |
|
if(!this->PrintObservers(os, indent.GetNextIndent())) |
| 532 |
|
{ |
| 533 |
|
os << indent.GetNextIndent() << "none\n"; |
| 534 |
|
} |
| 535 |
|
} |
| 536 |
|
|
| 537 |
|
MetaDataDictionary & |
| 538 |
|
Object |
| 539 |
|
::GetMetaDataDictionary(void) |
| 540 |
|
{ |
| 541 |
|
if(m_MetaDataDictionary==NULL) |
| 542 |
|
{ |
| 543 |
|
m_MetaDataDictionary=new MetaDataDictionary; |
| 544 |
|
} |
| 545 |
|
return *m_MetaDataDictionary; |
| 546 |
|
} |
| 547 |
|
|
| 548 |
|
const MetaDataDictionary & |
| 549 |
|
Object |
| 550 |
|
::GetMetaDataDictionary(void) const |
| 551 |
|
{ |
| 552 |
|
if(m_MetaDataDictionary==NULL) |
| 553 |
|
{ |
| 554 |
|
m_MetaDataDictionary=new MetaDataDictionary; |
| 555 |
|
} |
| 556 |
|
return *m_MetaDataDictionary; |
| 557 |
|
} |
| 558 |
|
|
| 559 |
|
void |
| 560 |
|
Object |
| 561 |
|
::SetMetaDataDictionary(const MetaDataDictionary & rhs) |
| 562 |
|
{ |
| 563 |
|
if(m_MetaDataDictionary==NULL) |
| 564 |
|
{ |
| 565 |
|
m_MetaDataDictionary=new MetaDataDictionary; |
| 566 |
|
} |
| 567 |
|
*m_MetaDataDictionary=rhs; |
| 568 |
|
} |
| 569 |
|
|
| 570 |
|
} // end namespace itk |
| 571 |
|
|