1 files changed, 23 insertions, 3 deletions

diff --git a/libkcal/incidence.cpp b/libkcal/incidence.cpp
index 11f7ecc..e4bcc5e 100644
--- a/libkcal/incidence.cpp
+++ b/libkcal/incidence.cpp
@@ -236,97 +236,117 @@ Incidence* Incidence::recreateCloneException( QDate d  )
     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;
@@ -423,107 +443,107 @@ void Incidence::setRelatedToUid(const QString &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)
 {
-  
+    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)
 {