4 files changed, 32 insertions, 4 deletions

diff --git a/libkcal/incidence.cpp b/libkcal/incidence.cpp
index 11f7ecc..e4bcc5e 100644
--- a/libkcal/incidence.cpp
+++ b/libkcal/incidence.cpp
@@ -1,760 +1,780 @@
 /*
     This file is part of libkcal.
     Copyright (c) 2001 Cornelius Schumacher <schumacher@kde.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
 */
 
 #include <kglobal.h>
 #include <klocale.h>
 #include <kdebug.h>
 
 #include "calformat.h"
 
 #include "incidence.h"
 #include "todo.h"
 
 using namespace KCal;
 
 Incidence::Incidence() :
   IncidenceBase(),
   mRelatedTo(0), mSecrecy(SecrecyPublic), mPriority(3)
 {
   mRecurrence = new Recurrence(this);
   mCancelled = false;
   recreate();
   mHasStartDate = true;
   mAlarms.setAutoDelete(true);
   mAttachments.setAutoDelete(true);
   mHasRecurrenceID = false;
   mHoliday = false;
   mBirthday = false;
   mAnniversary = false;
 
 }
 
 Incidence::Incidence( const Incidence &i ) : IncidenceBase( i )
 {
 // TODO: reenable attributes currently commented out.
   mRevision = i.mRevision;
   mCreated = i.mCreated;
   mDescription = i.mDescription;
   mSummary = i.mSummary;
   mCategories = i.mCategories;
 //  Incidence *mRelatedTo;          Incidence *mRelatedTo;
   mRelatedTo = 0;
   mRelatedToUid = i.mRelatedToUid;
 //  QPtrList<Incidence> mRelations;    QPtrList<Incidence> mRelations;
   mExDates = i.mExDates;
   mAttachments = i.mAttachments;
   mResources = i.mResources;
   mSecrecy = i.mSecrecy;
   mPriority = i.mPriority;
   mLocation = i.mLocation;
   mCancelled = i.mCancelled;
   mHasStartDate = i.mHasStartDate;
   QPtrListIterator<Alarm> it( i.mAlarms );
   const Alarm *a;
   while( (a = it.current()) ) {
     Alarm *b = new Alarm( *a );
     b->setParent( this );
     mAlarms.append( b );
 
     ++it;
   }
   mAlarms.setAutoDelete(true);
   mHasRecurrenceID = i.mHasRecurrenceID;
   mRecurrenceID = i.mRecurrenceID;
   mRecurrence = new Recurrence( *(i.mRecurrence), this );
   mHoliday = i.mHoliday ;
   mBirthday = i.mBirthday;
   mAnniversary = i.mAnniversary;
 }
 
 Incidence::~Incidence()
 {
    
   Incidence *ev;
    QPtrList<Incidence> Relations = relations();
   for (ev=Relations.first();ev;ev=Relations.next()) {
     if (ev->relatedTo() == this) ev->setRelatedTo(0);
   } 
   if (relatedTo()) relatedTo()->removeRelation(this);
   delete mRecurrence; 
  
 }
 
 bool Incidence::isHoliday() const
 {
     return mHoliday;
 }
 bool Incidence::isBirthday() const
 {
 
     return mBirthday ;
 }
 bool Incidence::isAnniversary() const
 {
     return mAnniversary ;
 
 }
 
 bool Incidence::hasRecurrenceID() const
 {
     return mHasRecurrenceID;
 }
 
 void Incidence::setHasRecurrenceID( bool b )
 {
     mHasRecurrenceID = b;
 }
    
 void Incidence::setRecurrenceID(QDateTime d)
 {
     mRecurrenceID = d;
     mHasRecurrenceID = true;
     updated(); 
 }
 QDateTime Incidence::recurrenceID () const
 {
     return mRecurrenceID;
 }
 
 bool Incidence::cancelled() const
 {
     return mCancelled;
 }
 void Incidence::setCancelled( bool b )
 {
     mCancelled = b;
     updated();
 }
 bool Incidence::hasStartDate() const
 {
   return mHasStartDate;
 }
 
 void Incidence::setHasStartDate(bool f)
 {
   if (mReadOnly) return;
   mHasStartDate = f;
   updated();
 }
 
 // A string comparison that considers that null and empty are the same
 static bool stringCompare( const QString& s1, const QString& s2 )
 {
     if ( s1.isEmpty() && s2.isEmpty() )
         return true;
     return s1 == s2;
 }
 
 bool KCal::operator==( const Incidence& i1, const Incidence& i2 )
 {
   
     if( i1.alarms().count() != i2.alarms().count() ) {
         return false; // no need to check further
     }
     if ( i1.alarms().count() > 0 ) {
         if ( !( *(i1.alarms().first()) == *(i2.alarms().first())) ) 
             {
             qDebug("alarm not equal ");
             return false;
         }
     }
 #if 0
     QPtrListIterator<Alarm> a1( i1.alarms() );
     QPtrListIterator<Alarm> a2( i2.alarms() );
     for( ; a1.current() && a2.current(); ++a1, ++a2 ) {
         if( *a1.current() == *a2.current() ) {
             continue;
         }
         else {
             return false;
         }
     }
 #endif
   
     if ( i1.hasRecurrenceID() == i2.hasRecurrenceID() ) {
         if ( i1.hasRecurrenceID() ) {
             if ( i1.recurrenceID() != i2.recurrenceID() )
                 return false;
         }
 
     } else {
         return false;
     }
 
     if ( ! operator==( (const IncidenceBase&)i1, (const IncidenceBase&)i2 ) )
         return false;
     if ( i1.hasStartDate() == i2.hasStartDate() ) {
         if ( i1.hasStartDate() ) {
             if ( i1.dtStart() != i2.dtStart() )
                 return false;
         }
     } else {
         return false;
     }
     if (!( *i1.recurrence() == *i2.recurrence()) ) {
         qDebug("recurrence is NOT equal ");
         return false;
     }
     return
         //  i1.created() == i2.created() &&
         stringCompare( i1.description(), i2.description() ) &&
         stringCompare( i1.summary(), i2.summary() ) &&
         i1.categories() == i2.categories() &&
         // no need to compare mRelatedTo
         stringCompare( i1.relatedToUid(), i2.relatedToUid() ) &&
         //      i1.relations() == i2.relations() &&
         i1.exDates() == i2.exDates() &&
         i1.attachments() == i2.attachments() &&
         i1.resources() == i2.resources() &&
         i1.secrecy() == i2.secrecy() &&
         i1.priority() == i2.priority() &&
         i1.cancelled() == i2.cancelled() &&
         stringCompare( i1.location(), i2.location() );
 }
 
 Incidence* Incidence::recreateCloneException( QDate d  )
 {
     Incidence* newInc = clone();
     newInc->recreate();
     if ( doesRecur() ) {
         addExDate( d );
         newInc->recurrence()->unsetRecurs();
         if ( typeID() == eventID ) {
             int len = dtStart().secsTo( ((Event*)this)->dtEnd());
             QTime tim = dtStart().time();
             newInc->setDtStart( QDateTime(d, tim) );
             ((Event*)newInc)->setDtEnd( newInc->dtStart().addSecs( len ) );
         } else {
             int len = dtStart().secsTo( ((Todo*)this)->dtDue());
             QTime tim = ((Todo*)this)->dtDue().time();
             ((Todo*)newInc)->setDtDue( QDateTime(d, tim) );
             ((Todo*)newInc)->setDtStart( ((Todo*)newInc)->dtDue().addSecs( -len ) );
             ((Todo*)this)->setRecurDates();
         }
         newInc->setExDates( DateList () );
     }
     return newInc;
 }
 
 void Incidence::recreate()
 {
   setCreated(QDateTime::currentDateTime());
 
   setUid(CalFormat::createUniqueId());
 
   setRevision(0);
   setIDStr( ":" );
   setLastModified(QDateTime::currentDateTime());
 }
 void Incidence::cloneRelations( Incidence * newInc )
 {
     // newInc is already a clone of this incidence
     Incidence * inc;
     Incidence * cloneInc;
     QPtrList<Incidence> Relations = relations();
     for (inc=Relations.first();inc;inc=Relations.next()) {
         cloneInc = inc->clone();
         cloneInc->recreate();
         cloneInc->setRelatedTo( newInc );
         inc->cloneRelations( cloneInc );
     } 
 }
 void Incidence::setReadOnly( bool readOnly )
 {
   IncidenceBase::setReadOnly( readOnly );
   recurrence()->setRecurReadOnly( readOnly);
 }
-
+void Incidence::setLastModifiedSubInvalid()
+{
+    mLastModifiedSub = QDateTime();
+    if ( mRelatedTo )
+        mRelatedTo->setLastModifiedSubInvalid();
+}
+QDateTime Incidence::lastModifiedSub()
+{
+    if ( !mRelations.count() )
+        return lastModified();
+    if ( mLastModifiedSub.isValid() )
+        return mLastModifiedSub;
+    mLastModifiedSub = lastModified();
+    Incidence * inc;
+    QPtrList<Incidence> Relations = relations();
+    for (inc=Relations.first();inc;inc=Relations.next()) {
+        if ( inc->lastModifiedSub() > mLastModifiedSub )
+            mLastModifiedSub = inc->lastModifiedSub();
+    }
+    return mLastModifiedSub;
+}
 void Incidence::setCreated(QDateTime created)
 {
   if (mReadOnly) return;
   mCreated = getEvenTime(created);
 }
 
 QDateTime Incidence::created() const
 {
   return mCreated;
 }
 
 void Incidence::setRevision(int rev)
 {
   if (mReadOnly) return;
   mRevision = rev;
 
   updated();
 }
 
 int Incidence::revision() const
 {
   return mRevision;
 }
 
 void Incidence::setDtStart(const QDateTime &dtStart)
 {
 
   QDateTime  dt = getEvenTime(dtStart);
   recurrence()->setRecurStart( dt);
   IncidenceBase::setDtStart( dt );
 }
 
 void Incidence::setDescription(const QString &description)
 {
   if (mReadOnly) return;
   mDescription = description;
   updated();
 }
 
 QString Incidence::description() const
 {
   return mDescription;
 }
 
 
 void Incidence::setSummary(const QString &summary)
 {
   if (mReadOnly) return;
   mSummary = summary;
   updated();
 }
 
 QString Incidence::summary() const
 {
   return mSummary;
 }
 void Incidence::checkCategories()
 {
     mHoliday =  mCategories.contains("Holiday") || mCategories.contains(i18n("Holiday"));
     mBirthday =  mCategories.contains("Birthday") || mCategories.contains(i18n("Birthday"));
     mAnniversary =  mCategories.contains("Anniversary") || mCategories.contains(i18n("Anniversary"));
 }
 
 void Incidence::addCategories(const QStringList &categories, bool addToRelations ) //addToRelations = false
 {
     if (mReadOnly) return;
     int i;
     for( i = 0; i < categories.count(); ++i ) {
         if (  !mCategories.contains (categories[i]))
             mCategories.append( categories[i] );
     }
     checkCategories();
     updated();
     if ( addToRelations ) {
         Incidence * inc;
         QPtrList<Incidence> Relations = relations();
         for (inc=Relations.first();inc;inc=Relations.next()) {
             inc->addCategories( categories, true );
         } 
     }
 }
 
 void Incidence::setCategories(const QStringList &categories, bool setForRelations ) //setForRelations = false
 {
   if (mReadOnly) return;
   mCategories = categories;
   checkCategories();
   updated();
   if ( setForRelations ) {
       Incidence * inc;
       QPtrList<Incidence> Relations = relations();
       for (inc=Relations.first();inc;inc=Relations.next()) {
           inc->setCategories( categories, true );
       } 
   }
 }
 
 // TODO: remove setCategories(QString) function
 void Incidence::setCategories(const QString &catStr)
 {
   if (mReadOnly) return;
   mCategories.clear();
 
   if (catStr.isEmpty()) return;
 
   mCategories = QStringList::split(",",catStr);
 
   QStringList::Iterator it;
   for(it = mCategories.begin();it != mCategories.end(); ++it) {
     *it = (*it).stripWhiteSpace();
   }
   checkCategories();
   updated();
 }
 // using this makes filtering 3 times faster
 QStringList* Incidence::categoriesP()
 {
   return &mCategories;
 }
 
 QStringList Incidence::categories() const
 {
   return mCategories;
 }
 
 QString Incidence::categoriesStr()
 {
   return mCategories.join(",");
 }
 QString Incidence::categoriesStrWithSpace()
 {
   return mCategories.join(", ");
 }
 
 void Incidence::setRelatedToUid(const QString &relatedToUid)
 {
   if (mReadOnly) return;
   mRelatedToUid = relatedToUid;
 }
 
 QString Incidence::relatedToUid() const
 {
   return mRelatedToUid;
 }
 
 void Incidence::setRelatedTo(Incidence *relatedTo)
 {
     //qDebug("Incidence::setRelatedTo %d ", relatedTo);
     //qDebug("setRelatedTo(Incidence *relatedTo) %s %s", summary().latin1(), relatedTo->summary().latin1() );
   if (mReadOnly || mRelatedTo == relatedTo) return;
   if(mRelatedTo) {
       // updated();
     mRelatedTo->removeRelation(this);
   }
   mRelatedTo = relatedTo;
   if (mRelatedTo)  {
       mRelatedTo->addRelation(this);
       mRelatedToUid = mRelatedTo->uid();
   } else {
       mRelatedToUid = "";
   }
 }
 
 Incidence *Incidence::relatedTo() const
 {
   return mRelatedTo;
 }
 
 QPtrList<Incidence> Incidence::relations() const
 {
   return mRelations;
 }
 
 void Incidence::addRelationsToList(QPtrList<Incidence> *rel)
 {
     Incidence* inc;
     QPtrList<Incidence> Relations = relations();
     for (inc=Relations.first();inc;inc=Relations.next()) {
         inc->addRelationsToList( rel );
     } 
     if ( rel->findRef( this ) == -1 ) 
         rel->append( this );
 }
 
 void Incidence::addRelation(Incidence *event)
 {
+    setLastModifiedSubInvalid();
   if( mRelations.findRef( event ) == -1 ) {
     mRelations.append(event);
     //updated();
   }
 }
 
 void Incidence::removeRelation(Incidence *event)
 {
-  
-  mRelations.removeRef(event); 
- 
+    setLastModifiedSubInvalid();
+  mRelations.removeRef(event);
 //  if (event->getRelatedTo() == this) event->setRelatedTo(0);
 }
 
 bool Incidence::recursOn(const QDate &qd) const
 {
   if (recurrence()->recursOnPure(qd) && !isException(qd)) return true;
   else return false;
 }
 
 void Incidence::setExDates(const DateList &exDates)
 {
   if (mReadOnly) return;
   mExDates = exDates;
 
   recurrence()->setRecurExDatesCount(mExDates.count());
 
   updated();
 }
 
 void Incidence::addExDate(const QDate &date)
 {
   if (mReadOnly) return;
   mExDates.append(date);
 
   recurrence()->setRecurExDatesCount(mExDates.count());
 
   updated();
 }
 
 DateList Incidence::exDates() const
 {
   return mExDates;
 }
 
 bool Incidence::isException(const QDate &date) const
 {
   DateList::ConstIterator it;
   for( it = mExDates.begin(); it != mExDates.end(); ++it ) {
     if ( (*it) == date ) {
       return true;
     }
   }
 
   return false;
 }
 
 void Incidence::addAttachment(Attachment *attachment)
 {
   if (mReadOnly || !attachment) return;
   mAttachments.append(attachment);
   updated();
 }
 
 void Incidence::deleteAttachment(Attachment *attachment)
 {
   mAttachments.removeRef(attachment);
 }
 
 void Incidence::deleteAttachments(const QString& mime)
 {
   Attachment *at = mAttachments.first();
   while (at) {
     if (at->mimeType() == mime)
       mAttachments.remove();
     else
       at = mAttachments.next();
   }
 }
 
 QPtrList<Attachment> Incidence::attachments() const
 {
   return mAttachments;
 }
 
 QPtrList<Attachment> Incidence::attachments(const QString& mime) const
 {
   QPtrList<Attachment> attachments;
   QPtrListIterator<Attachment> it( mAttachments );
   Attachment *at;
   while ( (at = it.current()) ) {
     if (at->mimeType() == mime)
       attachments.append(at);
     ++it;
   }
 
   return attachments;
 }
 
 void Incidence::setResources(const QStringList &resources)
 {
   if (mReadOnly) return;
   mResources = resources;
   updated();
 }
 
 QStringList Incidence::resources() const
 {
   return mResources;
 }
 
 
 void Incidence::setPriority(int priority)
 {
   if (mReadOnly) return;
   mPriority = priority;
   updated();
 }
 
 int Incidence::priority() const
 {
   return mPriority;
 }
 
 void Incidence::setSecrecy(int sec)
 {
   if (mReadOnly) return;
   mSecrecy = sec;
   updated();
 }
 
 int Incidence::secrecy() const
 {
   return mSecrecy;
 }
 
 QString Incidence::secrecyStr() const
 {
   return secrecyName(mSecrecy);
 }
 
 QString Incidence::secrecyName(int secrecy)
 {
   switch (secrecy) {
     case SecrecyPublic:
       return i18n("Public");
       break;
     case SecrecyPrivate:
       return i18n("Private");
       break;
     case SecrecyConfidential:
       return i18n("Confidential");
       break;
     default:
       return i18n("Undefined");
       break;
   }
 }
 
 QStringList Incidence::secrecyList()
 {
   QStringList list;
   list << secrecyName(SecrecyPublic);
   list << secrecyName(SecrecyPrivate);
   list << secrecyName(SecrecyConfidential);
 
   return list;
 }
 
 
 QPtrList<Alarm> Incidence::alarms() const
 {
   return mAlarms;
 }
 
 Alarm* Incidence::newAlarm()
 {
   Alarm* alarm = new Alarm(this);
   mAlarms.append(alarm);
 //  updated();
   return alarm;
 }
 
 void Incidence::addAlarm(Alarm *alarm)
 {
   mAlarms.append(alarm);
   updated();
 }
 
 void Incidence::removeAlarm(Alarm *alarm)
 {
   mAlarms.removeRef(alarm);
   updated();
 }
 
 void Incidence::clearAlarms()
 {
   mAlarms.clear();
   updated();
 }
 
 bool Incidence::isAlarmEnabled() const
 {
   Alarm* alarm;
   for (QPtrListIterator<Alarm> it(mAlarms); (alarm = it.current()) != 0; ++it) {
     if (alarm->enabled())
       return true;
   }
   return false;
 }
 
 Recurrence *Incidence::recurrence() const
 {
   return mRecurrence;
 }
 void Incidence::setRecurrence( Recurrence * r) 
 {
   delete mRecurrence;
   mRecurrence = r;
 }
 
 void Incidence::setLocation(const QString &location)
 {
   if (mReadOnly) return;
   mLocation = location;
   updated();
 }
 
 QString Incidence::location() const
 {
   return mLocation;
 }
 
 ushort Incidence::doesRecur() const
 {
   if ( mRecurrence ) return mRecurrence->doesRecur();
   else return Recurrence::rNone;
 }
 
 QDateTime Incidence::getNextOccurence( const QDateTime& dt, bool* ok ) const
 {
     QDateTime incidenceStart = dt;
     *ok = false;
     if ( doesRecur() ) {
         bool last;
          recurrence()->getPreviousDateTime( incidenceStart , &last );
          int count = 0;
          if ( !last ) {
              while ( !last ) {
                  ++count;
                  incidenceStart = recurrence()->getNextDateTime( incidenceStart, &last );
                  if ( recursOn( incidenceStart.date() ) ) {
                      last = true; // exit while llop
                  } else {
                      if ( last ) { // no alarm on last recurrence
                          return QDateTime ();
                      }
                      int year = incidenceStart.date().year();
                      // workaround for bug in recurrence
                      if ( count == 100 || year < 1000 || year > 5000 ) {
                          return QDateTime ();
                      }
                      incidenceStart = incidenceStart.addSecs( 1 );
                  }
              }
          } else {
              return QDateTime ();
          }
     } else {
         if ( hasStartDate () ) {
             incidenceStart = dtStart(); 
         }
         if ( typeID() == todoID ) {
             if ( ((Todo*)this)->hasDueDate() )
                 incidenceStart = ((Todo*)this)->dtDue();
         }
     }
     if ( incidenceStart > dt )
         *ok = true;
     return incidenceStart;
 }
 QDateTime Incidence::dtStart() const
 {
     if ( doesRecur() ) {
         if ( typeID() == todoID ) {
             ((Todo*)this)->checkSetCompletedFalse();
         }
     }
     return mDtStart;
 }
diff --git a/libkcal/incidence.h b/libkcal/incidence.h
index c88ba2f..d4af9f0 100644
--- a/libkcal/incidence.h
+++ b/libkcal/incidence.h
@@ -1,318 +1,321 @@
 /*
     This file is part of libkcal.
     Copyright (c) 2001 Cornelius Schumacher <schumacher@kde.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
 */
 #ifndef INCIDENCE_H
 #define INCIDENCE_H
 //
 // Incidence - base class of calendaring components
 //
 
 #include <qdatetime.h>
 #include <qstringlist.h>
 #include <qvaluelist.h>
 
 #include "recurrence.h"
 #include "alarm.h"
 #include "attachment.h"
 #include "listbase.h"
 #include "incidencebase.h"
 
 namespace KCal {
 
 class Event;
 class Todo;
 class Journal;
 
 /**
   This class provides the base class common to all calendar components.
 */
 class Incidence : public IncidenceBase
 {
   public:
     /**
       This class provides the interface for a visitor of calendar components. It
       serves as base class for concrete visitors, which implement certain actions on
       calendar components. It allows to add functions, which operate on the concrete
       types of calendar components, without changing the calendar component classes.
     */
     class Visitor
     {
       public:
         /** Destruct Incidence::Visitor */
         virtual ~Visitor() {}
 
         /**
           Reimplement this function in your concrete subclass of IncidenceVisitor to perform actions
           on an Event object.
         */
         virtual bool visit(Event *) { return false; }
         /**
           Reimplement this function in your concrete subclass of IncidenceVisitor to perform actions
           on an Todo object.
         */
         virtual bool visit(Todo *) { return false; }
         /**
           Reimplement this function in your concrete subclass of IncidenceVisitor to perform actions
           on an Journal object.
         */
         virtual bool visit(Journal *) { return false; }
 
       protected:
         /** Constructor is protected to prevent direct creation of visitor base class. */
         Visitor() {}
     };
 
     /**
       This class implements a visitor for adding an Incidence to a resource
       supporting addEvent(), addTodo() and addJournal() calls.
     */
     template<class T>
     class AddVisitor : public Visitor
     {
       public:
         AddVisitor( T *r ) : mResource( r ) {}
         bool visit( Event *e ) { return mResource->addEvent( e ); }
         bool visit( Todo *t ) { return mResource->addTodo( t ); }
         bool visit( Journal *j ) { return mResource->addJournal( j ); }
 
       private:
         T *mResource;
     };
 
     /** enumeration for describing an event's secrecy. */
     enum { SecrecyPublic = 0, SecrecyPrivate = 1, SecrecyConfidential = 2 };
     typedef ListBase<Incidence> List;
     Incidence();
     Incidence(const Incidence &);
     ~Incidence();
 
     /**
       Accept IncidenceVisitor. A class taking part in the visitor mechanism has to
       provide this implementation:
       <pre>
         bool accept(Visitor &v) { return v.visit(this); }
       </pre>
     */
     virtual bool accept(Visitor &) { return false; }
 
     virtual Incidence *clone() = 0;
     virtual void cloneRelations( Incidence * );
     void addRelationsToList(QPtrList<Incidence> *rel);
     virtual QDateTime getNextAlarmDateTime( bool * ok, int * offset, QDateTime start_dt ) const = 0;
     void setReadOnly( bool );
 
     /**
       Recreate event. The event is made a new unique event, but already stored
       event information is preserved. Sets uniquie id, creation date, last
       modification date and revision number.
     */
     void recreate();
     Incidence*  recreateCloneException(QDate);
 
     /** set creation date */
     void setCreated(QDateTime);
     /** return time and date of creation. */
     QDateTime created() const;
 
     /** set the number of revisions this event has seen */
     void setRevision(int rev);
     /** return the number of revisions this event has seen */
     int revision() const;
 
     /** Set starting date/time. */
     virtual void setDtStart(const QDateTime &dtStart);
     /** Return the incidence's ending date/time as a QDateTime. */
     virtual QDateTime dtEnd() const  { return QDateTime(); }
 
     /** sets the event's lengthy description. */
     void setDescription(const QString &description);
     /** returns a reference to the event's description. */
     QString description() const;
 
     /** sets the event's short summary. */
     void setSummary(const QString &summary);
     /** returns a reference to the event's summary. */
     QString summary() const;
 
     /** set event's applicable categories */
     void setCategories(const QStringList &categories, bool setForRelations = false);
     void addCategories(const QStringList &categories, bool addToRelations = false);
     /** set event's categories based on a comma delimited string */
     void setCategories(const QString &catStr);
     /** return categories in a list */
     QStringList categories() const;
     QStringList* categoriesP();
     /** return categories as a comma separated string */
     QString categoriesStr();
     QString categoriesStrWithSpace();
 
     /** point at some other event to which the event relates. This function should
      *  only be used when constructing a calendar before the related Event
      *  exists. */
     void setRelatedToUid(const QString &);
     /** what event does this one relate to? This function should
      *  only be used when constructing a calendar before the related Event
      *  exists. */
     QString relatedToUid() const;
     /** point at some other event to which the event relates */
     void setRelatedTo(Incidence *relatedTo);
     /** what event does this one relate to? */
     Incidence *relatedTo() const;
     /** All events that are related to this event */
     QPtrList<Incidence> relations() const;
     /** Add an event which is related to this event */
     void addRelation(Incidence *);
     /** Remove event that is related to this event */
     void removeRelation(Incidence *);
 
     /** returns the list of dates which are exceptions to the recurrence rule */
     DateList exDates() const;
     /** sets the list of dates which are exceptions to the recurrence rule */
     void setExDates(const DateList &_exDates);
     void setExDates(const char *dates);
     /** Add a date to the list of exceptions of the recurrence rule. */
     void addExDate(const QDate &date);
 
     /** returns true if there is an exception for this date in the recurrence
      rule set, or false otherwise. */
     bool isException(const QDate &qd) const;
 
     /** add attachment to this event */
     void addAttachment(Attachment *attachment);
     /** remove and delete a specific attachment */
     void deleteAttachment(Attachment *attachment);
     /** remove and delete all attachments with this mime type */
     void deleteAttachments(const QString& mime);
     /** return list of all associated attachments */
     QPtrList<Attachment> attachments() const;
     /** find a list of attachments with this mime type */
     QPtrList<Attachment> attachments(const QString& mime) const;
 
     /** sets the event's status the value specified.  See the enumeration
      * above for possible values. */
     void setSecrecy(int);
     /** return the event's secrecy. */
     int secrecy() const;
     /** return the event's secrecy in string format. */
     QString secrecyStr() const;
     /** return list of all availbale secrecy classes */
     static QStringList secrecyList();
     /** return human-readable name of secrecy class */
     static QString secrecyName(int);
 
     /** returns TRUE if the date specified is one on which the event will
      * recur. */
     bool recursOn(const QDate &qd) const;
 
     // VEVENT and VTODO, but not VJOURNAL (move to EventBase class?):
 
     /** set resources used, such as Office, Car, etc. */
     void setResources(const QStringList &resources);
     /** return list of current resources */
     QStringList resources() const;
 
     /** set the event's priority, 0 is undefined, 1 highest (decreasing order) */
     void setPriority(int priority);
     /** get the event's priority */
     int priority() const;
 
     /** All alarms that are associated with this incidence */
     QPtrList<Alarm> alarms() const;
     /** Create a new alarm which is associated with this incidence */
     Alarm* newAlarm();
     /** Add an alarm which is associated with this incidence */
     void addAlarm(Alarm*);
     /** Remove an alarm that is associated with this incidence */
     void removeAlarm(Alarm*);
     /** Remove all alarms that are associated with this incidence */
     void clearAlarms();
     /** return whether any alarm associated with this incidence is enabled */
     bool isAlarmEnabled() const;
 
     /**
       Return the recurrence rule associated with this incidence. If there is
       none, returns an appropriate (non-0) object.
     */
     Recurrence *recurrence() const;
     void setRecurrence(Recurrence * r);
     /**
       Forward to Recurrence::doesRecur().
     */
     ushort doesRecur() const;
 
     /** set the event's/todo's location. Do _not_ use it with journal */
     void setLocation(const QString &location);
     /** return the event's/todo's location. Do _not_ use it with journal */
     QString location() const;  
    /** returns TRUE or FALSE depending on whether the todo has a start date */
     bool hasStartDate() const;
     /** sets the event's hasStartDate value. */
     void setHasStartDate(bool f);
     QDateTime getNextOccurence( const QDateTime& dt, bool* yes ) const;
     bool cancelled() const;
     void setCancelled( bool b );
     
     bool hasRecurrenceID() const;
     void setHasRecurrenceID( bool b );
     
     void setRecurrenceID(QDateTime);
     QDateTime recurrenceID () const;
     QDateTime dtStart() const;
     bool isHoliday() const;
     bool isBirthday() const;
     bool isAnniversary() const;
+    QDateTime lastModifiedSub();
+    void setLastModifiedSubInvalid();
     
 
 protected:
     QPtrList<Alarm> mAlarms;
     QPtrList<Incidence> mRelations;
     QDateTime mRecurrenceID;
     bool mHasRecurrenceID;
   private:
     void checkCategories();
     bool mHoliday, mBirthday, mAnniversary;
     int mRevision;
     bool mCancelled;
 
     // base components of jounal, event and todo
     QDateTime mCreated;
+    QDateTime mLastModifiedSub;
     QString mDescription;
     QString mSummary;
     QStringList mCategories;
     Incidence *mRelatedTo;
     QString mRelatedToUid;
     DateList mExDates;
     QPtrList<Attachment> mAttachments;
     QStringList mResources;
     bool mHasStartDate;                  // if todo has associated start date
 
     int mSecrecy;
     int mPriority;                        // 1 = highest, 2 = less, etc.
 
     //QPtrList<Alarm> mAlarms;
     Recurrence *mRecurrence;
     
     QString mLocation;
 };
 
 bool operator==( const Incidence&, const Incidence& );
 
 }
 
 #endif
diff --git a/libkcal/incidencebase.cpp b/libkcal/incidencebase.cpp
index 1a19f3e..022dead 100644
--- a/libkcal/incidencebase.cpp
+++ b/libkcal/incidencebase.cpp
@@ -1,478 +1,482 @@
 /*
     This file is part of libkcal.
     Copyright (c) 2001 Cornelius Schumacher <schumacher@kde.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
 */
 
 #include <kglobal.h>
 #include <klocale.h>
 #include <kdebug.h>
 #include <kidmanager.h>
 
 #include "calformat.h"
 #include "syncdefines.h"
 
 #include "incidencebase.h"
 
 using namespace KCal;
 
 IncidenceBase::IncidenceBase() :
   mReadOnly(false), mFloats(true), mDuration(0), mHasDuration(false),
   mPilotId(0), mSyncStatus(SYNCMOD)
 {
   blockLastModified = false;
   setUid(CalFormat::createUniqueId());
   mOrganizer = "";
   mFloats = false;
   mDuration = 0;
   mHasDuration = false;
   mPilotId = 0;
   mExternalId = ":";
   mTempSyncStat =  SYNC_TEMPSTATE_INITIAL;
   mSyncStatus = 0;
   mAttendees.setAutoDelete( true );
   mCalEnabled = true;
   mAlarmEnabled = true;
   mCalID = 0;
 }
 
 IncidenceBase::IncidenceBase(const IncidenceBase &i) :
   CustomProperties( i )
 {
 
   blockLastModified = false;
   mReadOnly = i.mReadOnly;
   mDtStart = i.mDtStart;
   mDuration = i.mDuration;
   mHasDuration = i.mHasDuration;
   mOrganizer = i.mOrganizer;
   mUid = i.mUid;
   mCalEnabled = i.mCalEnabled;
   mAlarmEnabled = i.mAlarmEnabled;
   mCalID = i.mCalID;
   QPtrList<Attendee> attendees = i.attendees();
   for( Attendee *a = attendees.first(); a; a = attendees.next() ) {
     mAttendees.append( new Attendee( *a ) );
   }
   mFloats = i.mFloats;
   mLastModified = i.mLastModified;
   mPilotId = i.mPilotId;
   mTempSyncStat = i.mTempSyncStat;
   mSyncStatus = i.mSyncStatus;
   mExternalId = i.mExternalId;
   // The copied object is a new one, so it isn't observed by the observer
   // of the original object.
   mObservers.clear();
   
   mAttendees.setAutoDelete( true );
 }
 
 IncidenceBase::~IncidenceBase()
 {
 }
 
 
 bool KCal::operator==( const IncidenceBase& i1, const IncidenceBase& i2 )
 {
     // do not compare mSyncStatus and mExternalId 
     if( i1.attendees().count() != i2.attendees().count() ) {
         return false; // no need to check further
     }
     if ( i1.attendees().count() > 0 ) {
         Attendee * a1 = i1.attendees().first(), *a2 =i2.attendees().first() ;
         while ( a1 ) {
             if ( !( (*a1) == (*a2)) ) 
                 {
                     //qDebug("Attendee not equal ");
                     return false;
                 }
             a1 = i1.attendees().next();
             a2 = i2.attendees().next();
         }
     }
     //if ( i1.dtStart() != i2.dtStart() )
     //  return false;
 #if 0
     qDebug("1 %d ",i1.doesFloat() == i2.doesFloat() );
     qDebug("1 %d ",i1.duration() == i2.duration() );
     qDebug("3 %d ",i1.hasDuration() == i2.hasDuration() );
     qDebug("1 %d ",i1.pilotId() == i2.pilotId() );
     qDebug("1 %d %d %d",i1.syncStatus() == i2.syncStatus() , i1.syncStatus(),i2.syncStatus() );
     qDebug("6 %d ",i1.organizer() == i2.organizer() );
   
 #endif
     if ( i1.hasDuration() == i2.hasDuration() ) {
         if ( i1.hasDuration() ) {
             if ( i1.duration() != i2.duration() )
                 return false;
         }
     } else {
         return false;
     }
 
     return ( i1.organizer() == i2.organizer() &&
              // i1.uid() == i2.uid() &&
              // Don't compare lastModified, otherwise the operator is not
              // of much use. We are not comparing for identity, after all.
              i1.doesFloat() == i2.doesFloat() &&
              i1.pilotId() == i2.pilotId() );// &&  i1.syncStatus() == i2.syncStatus() );
     // no need to compare mObserver
 }
 
   
 QDateTime IncidenceBase::getEvenTime( QDateTime dt )
 {
     QTime t =  dt.time();
     dt.setTime( QTime (t.hour (), t.minute (), t.second () )  );
     return dt;
 }     
 
 bool IncidenceBase::isTagged() const
 {
     return mIsTagged;
 }
 void IncidenceBase::setTagged( bool b)
 {
     mIsTagged = b;
 }
 void IncidenceBase::setCalID( int id )
 {
     if ( mCalID > 0 ) {
         blockLastModified = true;
         updated();
         blockLastModified = false;
     }
     mCalID = id;
 }
 int IncidenceBase::calID() const
 {
     return mCalID;
 }
 void IncidenceBase::setCalEnabled( bool b )
 {
     mCalEnabled = b;
 }
 bool IncidenceBase::calEnabled() const
 {
     return mCalEnabled;
 }
 
 void IncidenceBase::setAlarmEnabled( bool b )
 {
     mAlarmEnabled = b;
 }
 bool IncidenceBase::alarmEnabled() const
 {
     return mAlarmEnabled;
 }
 
 
 void IncidenceBase::setUid(const QString &uid)
 {
   mUid = uid;
   updated();
 }
 
 QString IncidenceBase::uid() const
 {
   return mUid;
 }
+void IncidenceBase::setLastModifiedSubInvalid()
+{
 
+}
 void IncidenceBase::setLastModified(const QDateTime &lm)
 {
     if ( blockLastModified ) return;
   // DON'T! updated() because we call this from
   // Calendar::updateEvent().
   mLastModified = getEvenTime(lm);
+  setLastModifiedSubInvalid();
   //qDebug("IncidenceBase::setLastModified %s ",lm.toString().latin1());
 }
 
 QDateTime IncidenceBase::lastModified() const
 {
   return mLastModified;
 }
 
 void IncidenceBase::setOrganizer(const QString &o)
 {
   // we don't check for readonly here, because it is
   // possible that by setting the organizer we are changing
   // the event's readonly status...
   mOrganizer = o;
   if (mOrganizer.left(7).upper() == "MAILTO:")
     mOrganizer = mOrganizer.remove(0,7);
 
   updated();
 }
 
 QString IncidenceBase::organizer() const
 {
   return mOrganizer;
 }
 
 void IncidenceBase::setReadOnly( bool readOnly )
 {
   mReadOnly = readOnly;
 }
 
 void IncidenceBase::setDtStart(const QDateTime &dtStart)
 {
 //  if (mReadOnly) return;
   mDtStart = getEvenTime(dtStart);
   updated();
 }
 
 
 QDateTime IncidenceBase::dtStart() const
 {
   return mDtStart;
 }
 
 QString IncidenceBase::dtStartTimeStr() const
 {
   return KGlobal::locale()->formatTime(dtStart().time());
 }
 
 QString IncidenceBase::dtStartDateStr(bool shortfmt) const
 {
   return KGlobal::locale()->formatDate(dtStart().date(),shortfmt);
 }
 
 QString IncidenceBase::dtStartStr(bool shortfmt) const
 {
     if ( doesFloat() )
         return KGlobal::locale()->formatDate(dtStart().date(),shortfmt);
     return KGlobal::locale()->formatDateTime(dtStart(), shortfmt);
 }
 
 
 bool IncidenceBase::doesFloat() const
 {
   return mFloats;
 }
 
 void IncidenceBase::setFloats(bool f)
 {
   if (mReadOnly) return;
   mFloats = f;
   updated();
 }
 
 
 bool IncidenceBase::addAttendee(Attendee *a, bool doupdate)
 {
   if (mReadOnly) return false;
   if (a->name().left(7).upper() == "MAILTO:")
     a->setName(a->name().remove(0,7));
 
   QPtrListIterator<Attendee> qli(mAttendees);
   
   qli.toFirst();
   while (qli) {
       if (*qli.current() == *a)
           return false;
       ++qli;
   }
   mAttendees.append(a);
   if (doupdate) updated();
   return true;
 }
 
 #if 0
 void IncidenceBase::removeAttendee(Attendee *a)
 {
   if (mReadOnly) return;
   mAttendees.removeRef(a);
   updated();
 }
 
 void IncidenceBase::removeAttendee(const char *n)
 {
   Attendee *a;
 
   if (mReadOnly) return;
   for (a = mAttendees.first(); a; a = mAttendees.next())
     if (a->getName() == n) {
       mAttendees.remove();
       break;
     }
 }
 #endif
 
 void IncidenceBase::clearAttendees()
 {
   if (mReadOnly) return;
   mAttendees.clear();
 }
 
 #if 0
 Attendee *IncidenceBase::getAttendee(const char *n) const
 {
   QPtrListIterator<Attendee> qli(mAttendees);
 
   qli.toFirst();
   while (qli) {
     if (qli.current()->getName() == n)
       return qli.current();
     ++qli;
   }
   return 0L;
 }
 #endif
 
 Attendee *IncidenceBase::attendeeByMail(const QString &email)
 {
   QPtrListIterator<Attendee> qli(mAttendees);
 
   qli.toFirst();
   while (qli) {
       if (qli.current()->email().lower() == email.lower())
       return qli.current();
     ++qli;
   }
   return 0L;
 }
 
 Attendee *IncidenceBase::attendeeByMails(const QStringList &emails, const QString& email)
 {
   QPtrListIterator<Attendee> qli(mAttendees);
 
   QStringList mails = emails;
   if (!email.isEmpty()) {
     mails.append(email);
   }
   qli.toFirst();
   while (qli) {
     for ( QStringList::Iterator it = mails.begin(); it != mails.end(); ++it ) {
         if (qli.current()->email().lower() == (*it).lower())
         return qli.current();
      }
 
     ++qli;
   }
   return 0L;
 }
 
 void IncidenceBase::setDuration(int seconds)
 {
   mDuration = seconds;
   setHasDuration(true);
 }
 
 int IncidenceBase::duration() const
 {
   return mDuration;
 }
 
 void IncidenceBase::setHasDuration(bool b)
 {
   mHasDuration = b;
 }
 
 bool IncidenceBase::hasDuration() const
 {
   return mHasDuration;
 }
 
 void IncidenceBase::setSyncStatus(int stat)
 {
   if (mReadOnly) return;
   mSyncStatus = stat;
 }
 
 int IncidenceBase::syncStatus() const
 {
   return mSyncStatus;
 }
 
 void IncidenceBase::setPilotId( int id )
 {
   if (mReadOnly) return;
   mPilotId = id;
 }
 
 int IncidenceBase::pilotId() const
 {
   return mPilotId;
 }
 
 int IncidenceBase::tempSyncStat() const
 {
   return mTempSyncStat;
 }
 void IncidenceBase::setTempSyncStat( int id )
 {
   if (mReadOnly) return;
   mTempSyncStat = id;
 }
 
 void IncidenceBase::removeID(const QString &prof)
 {
     if ( prof.isEmpty() )
         mExternalId = ":";
     else
         mExternalId = KIdManager::removeId ( mExternalId, prof);
 
 }
 void IncidenceBase::setID( const QString & prof , const QString & id )
 {
     mExternalId = KIdManager::setId ( mExternalId, prof, id );
 }
 QString IncidenceBase::getID( const QString &  prof)
 {
     return KIdManager::getId ( mExternalId, prof ); 
 }
 
 // example  :Sharp_DTM;22;23566:TP;-1;8654:TPP;18;0:
 // format name;III;JJJ:  III >= 0, may be -1.  JJJ always >= 0  
 void IncidenceBase::setCsum( const QString & prof , const QString & id )
 {
     mExternalId = KIdManager::setCsum ( mExternalId, prof, id );
 }
 QString IncidenceBase::getCsum( const QString &  prof)
 {
     return KIdManager::getCsum ( mExternalId, prof ); 
 }
 
 void IncidenceBase::setIDStr( const QString & s )
 {
   if (mReadOnly) return;
   mExternalId = s;
 }
 
 QString IncidenceBase::IDStr() const
 {
     return mExternalId ;
 }
 void IncidenceBase::registerObserver( IncidenceBase::Observer *observer )
 {
   if( !mObservers.contains(observer) ) mObservers.append( observer );
 }
 
 void IncidenceBase::unRegisterObserver( IncidenceBase::Observer *observer )
 {
   mObservers.remove( observer );
 }
 
 void IncidenceBase::updated()
 {
   QPtrListIterator<Observer> it(mObservers);
   while( it.current() ) {
     Observer *o = it.current();
     ++it;
     o->incidenceUpdated( this );
   }
 }
diff --git a/libkcal/incidencebase.h b/libkcal/incidencebase.h
index bed73db..665c1f6 100644
--- a/libkcal/incidencebase.h
+++ b/libkcal/incidencebase.h
@@ -1,186 +1,187 @@
 /*
     This file is part of libkcal.
     Copyright (c) 2001 Cornelius Schumacher <schumacher@kde.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
 */
 #ifndef KCAL_INCIDENCEBASE_H
 #define KCAL_INCIDENCEBASE_H
 //
 // Incidence - base class of calendaring components
 //
 
 #include <qdatetime.h>
 #include <qstringlist.h>
 #include <qvaluelist.h>
 #include <qptrlist.h>
 
 #include "customproperties.h"
 #include "attendee.h"
 
 namespace KCal {
 
 typedef QValueList<QDate> DateList;
  enum IncTypeID { eventID,todoID,journalID,freebusyID };
 
 /**
   This class provides the base class common to all calendar components.
 */
 class IncidenceBase : public CustomProperties
 {
   public:
     class Observer {
       public:
         virtual void incidenceUpdated( IncidenceBase * ) = 0;
     };
 
     IncidenceBase();
     IncidenceBase(const IncidenceBase &);
     virtual ~IncidenceBase();
 
     virtual QCString type() const = 0;
     virtual  IncTypeID typeID() const = 0;
 
     /** Set the unique id for the event */
     void setUid(const QString &);
     /** Return the unique id for the event */
     QString uid() const;
 
     /** Sets the time the incidence was last modified. */
     void setLastModified(const QDateTime &lm);
     /** Return the time the incidence was last modified. */
     QDateTime lastModified() const;
 
     /** sets the organizer for the event */
     void setOrganizer(const QString &o);
     QString organizer() const;
 
     /** Set readonly status. */
     virtual void setReadOnly( bool );
     /** Return if the object is read-only. */
     bool isReadOnly() const { return mReadOnly; }
 
     /** for setting the event's starting date/time with a QDateTime. */
     virtual void setDtStart(const QDateTime &dtStart);
     /** returns an event's starting date/time as a QDateTime. */
     virtual QDateTime dtStart() const;
     /** returns an event's starting time as a string formatted according to the
      users locale settings */
     QString dtStartTimeStr() const;
     /** returns an event's starting date as a string formatted according to the
      users locale settings */
     QString dtStartDateStr(bool shortfmt=true) const;
     /** returns an event's starting date and time as a string formatted according
      to the users locale settings */
     QString dtStartStr(bool shortfmt=true) const;
 
     virtual void setDuration(int seconds);
     int duration() const;
     void setHasDuration(bool);
     bool hasDuration() const;
 
     /** Return true or false depending on whether the incidence "floats,"
      * i.e. has a date but no time attached to it. */
     bool doesFloat() const;
     /** Set whether the incidence floats, i.e. has a date but no time attached to it. */
     void setFloats(bool f);
 
     /**
       Add Attendee to this incidence. IncidenceBase takes ownership of the
       Attendee object.
     */
     bool addAttendee(Attendee *a, bool doupdate=true );
 //    void removeAttendee(Attendee *a);
 //    void removeAttendee(const char *n);
     /** Remove all Attendees. */
     void clearAttendees();
     /** Return list of attendees. */
     QPtrList<Attendee> attendees() const { return mAttendees; };
     /** Return number of attendees. */
     int attendeeCount() const { return mAttendees.count(); };
     /** Return the Attendee with this email */
     Attendee* attendeeByMail(const QString &);
     /** Return first Attendee with one of this emails */
     Attendee* attendeeByMails(const QStringList &, const QString& email = QString::null);
 
     /** pilot syncronization states */
     enum { SYNCNONE = 0, SYNCMOD = 1, SYNCDEL = 3 };
     /** Set synchronisation satus. */
     void setSyncStatus(int stat);
     /** Return synchronisation status. */
     int syncStatus() const;
 
     /** Set Pilot Id. */
     void setPilotId(int id);
     /** Return Pilot Id. */
     int pilotId() const;
 
     void setTempSyncStat(int id);
     int tempSyncStat() const;
     void setIDStr( const QString & );
     QString IDStr() const;
     void setID( const QString &, const QString & );
     QString  getID( const QString & );
     void setCsum( const QString &, const QString & );
     QString getCsum( const QString & );
     void removeID(const QString &);
 
     void registerObserver( Observer * );
     void unRegisterObserver( Observer * );
     void updated();
     void setCalID( int id );
     int calID() const;
     void setCalEnabled( bool );
     bool calEnabled() const; 
     void setAlarmEnabled( bool );
     bool alarmEnabled() const;
     bool isTagged() const;
     void setTagged( bool );
+    virtual void setLastModifiedSubInvalid();
   protected:
     bool blockLastModified;
     bool mIsTagged;
     QDateTime mDtStart;
     bool mReadOnly;
     QDateTime getEvenTime( QDateTime );
 
   private:
     // base components
     QString mOrganizer;
     QString mUid;
     int mCalID;
     bool mCalEnabled;
     bool mAlarmEnabled;
     QDateTime mLastModified;
     QPtrList<Attendee> mAttendees;
 
     bool mFloats;
 
     int mDuration;
     bool mHasDuration;
     QString  mExternalId;
     int mTempSyncStat;
 
     // PILOT SYNCHRONIZATION STUFF
     int mPilotId;                         // unique id for pilot sync
     int mSyncStatus;                      // status (for sync)
 
     QPtrList<Observer> mObservers;
 };
 
 bool operator==( const IncidenceBase&, const IncidenceBase& );
 }
 
 #endif