6 files changed, 81 insertions, 18 deletions

diff --git a/libkcal/calendar.cpp b/libkcal/calendar.cpp
index 8535191..1350f6d 100644
--- a/libkcal/calendar.cpp
+++ b/libkcal/calendar.cpp
@@ -1,58 +1,57 @@
 /*
     This file is part of libkcal.
     Copyright (c) 1998 Preston Brown
     Copyright (c) 2000,2001 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 <stdlib.h>
 #include <time.h>
 
 #include <kdebug.h>
 #include <kglobal.h>
 #include <klocale.h>
 
 #include "exceptions.h"
 #include "calfilter.h"
 
 #include "calendar.h"
 #include "syncdefines.h"
 
 using namespace KCal;
 
 Calendar::Calendar()
 {
   
   init();
   setTimeZoneId( " 00:00 Europe/London(UTC)" );
 }
 
 Calendar::Calendar( const QString &timeZoneId )
 { 
 
     init();
     setTimeZoneId(timeZoneId);
 }
 
 void Calendar::init()
 {
   mObserver = 0;
   mNewObserver = false;
   mUndoIncidence = 0;
   mDeleteIncidencesOnClose = true;
   mModified = false;
   mDefaultCalendar = 1;
@@ -375,115 +374,119 @@ void Calendar::addIncidenceBranch(Incidence *i)
        addIncidenceBranch( inc );
     } 
 }
 
 bool Calendar::addIncidence(Incidence *i)
 {
   Incidence::AddVisitor<Calendar> v(this);
   if ( i->calID() == 0 )
       i->setCalID_block( mDefaultCalendar );
   i->setCalEnabled( true );
   return i->accept(v);
 }
 void Calendar::deleteIncidence(Incidence *in)
 {
     if ( in->typeID() == eventID )
         deleteEvent( (Event*) in );
     else if ( in->typeID() == todoID )
         deleteTodo( (Todo*) in);
     else if ( in->typeID() == journalID )
         deleteJournal( (Journal*) in );
 }
 
 Incidence* Calendar::incidence( const QString& uid )
 {
   Incidence* i;
 
   if( (i = todo( uid )) != 0 )
     return i;
   if( (i = event( uid )) != 0 )
     return i;
   if( (i = journal( uid )) != 0 )
       return i;
 
   return 0;
 }
 
 QPtrList<Todo> Calendar::todos()
 {
   QPtrList<Todo> tl = rawTodos();
   mFilter->apply( &tl );
   return tl;
 }
 
 // When this is called, the todo have already been added to the calendar.
 // This method is only about linking related todos
 void Calendar::setupRelations( Incidence *incidence )
 {
   QString uid = incidence->uid();
-  //qDebug("Calendar::setupRelations ");
+  //qDebug("Calendar::setupRelations %s", incidence->summary().latin1());
   // First, go over the list of orphans and see if this is their parent
   while( Incidence* i = mOrphans[ uid ] ) {
     mOrphans.remove( uid );
     i->setRelatedTo( incidence );
+    //qDebug("Add child %s ti inc  %s", i->summary().latin1(),incidence->summary().latin1());
     incidence->addRelation( i );
     mOrphanUids.remove( i->uid() );
   }
 
   // Now see about this incidences parent
   if( !incidence->relatedTo() && !incidence->relatedToUid().isEmpty() ) {
     // This incidence has a uid it is related to, but is not registered to it yet
     // Try to find it
-    Incidence* parent = this->incidence( incidence->relatedToUid() );
+    //qDebug("Test parent for   %s", incidence->summary().latin1());
+    Incidence* parent = this->incidenceForUid( incidence->relatedToUid(), true );
     if( parent ) {
       // Found it
+        // qDebug("parent found for for   %s", incidence->summary().latin1());
       incidence->setRelatedTo( parent );
       parent->addRelation( incidence );
     } else {
+        // qDebug("NO parent found for for   %s", incidence->summary().latin1());
       // Not found, put this in the mOrphans list
       mOrphans.insert( incidence->relatedToUid(), incidence );
       mOrphanUids.insert( incidence->uid(), incidence );
     }
   }
 }
 
 // If a task with subtasks is deleted, move it's subtasks to the orphans list
 void Calendar::removeRelations( Incidence *incidence )
 {
     // qDebug("Calendar::removeRelations ");
     QString uid = incidence->uid();
 
     QPtrList<Incidence> relations = incidence->relations();
     for( Incidence* i = relations.first(); i; i = relations.next() )
         if( !mOrphanUids.find( i->uid() ) ) {
             mOrphans.insert( uid, i );
             mOrphanUids.insert( i->uid(), i );
             i->setRelatedTo( 0 );
             i->setRelatedToUid( uid );
         }
 
     // If this incidence is related to something else, tell that about it
     if( incidence->relatedTo() )
         incidence->relatedTo()->removeRelation( incidence );
 
     // Remove this one from the orphans list
     if( mOrphanUids.remove( uid ) ) {
         QString r2uid = incidence->relatedToUid();
         QPtrList<Incidence> tempList;
         while( Incidence* i = mOrphans[ r2uid ] ) {
             mOrphans.remove( r2uid );
             if ( i != incidence ) tempList.append( i );
         }
         Incidence* inc = tempList.first();
         while ( inc ) {
             mOrphans.insert( r2uid, inc );
             inc = tempList.next();
         }
     }
     // LR: and another big bad bug found
 #if 0
         // This incidence is located in the orphans list - it should be removed
         if( !( incidence->relatedTo() != 0 && mOrphans.remove( incidence->relatedTo()->uid() ) ) ) {
             // Removing wasn't that easy
             for( QDictIterator<Incidence> it( mOrphans ); it.current(); ++it ) {
                 if( it.current()->uid() == uid ) {
                     mOrphans.remove( it.currentKey() );
diff --git a/libkcal/calendar.h b/libkcal/calendar.h
index f301768..fbc40ad 100644
--- a/libkcal/calendar.h
+++ b/libkcal/calendar.h
@@ -32,97 +32,98 @@
 #include "event.h"
 #include "todo.h"
 #include "journal.h"
 #include "calfilter.h"
 
 //#define _TIME_ZONE "-0500" /* hardcoded, overridden in config file. */
 
 class KConfig;
 
 namespace KCal {
 
 
 /**
   This is the main "calendar" object class for KOrganizer.  It holds
   information like all appointments/events, user information, etc. etc.
   one calendar is associated with each CalendarView (@see calendarview.h).
   This is an abstract base class defining the interface to a calendar. It is
   implemented by subclasses like @see CalendarLocal, which use different
   methods to store and access the data.
 
   Ownership of events etc. is handled by the following policy: As soon as an
   event (or any other subclass of IncidenceBase) object is added to the
   Calendar by addEvent() it is owned by the Calendar object. The Calendar takes
   care of deleting it. All Events returned by the query functions are returned
   as pointers, that means all changes to the returned events are immediately
   visible in the Calendar. You shouldn't delete any Event object you get from
   Calendar.
 */
 class Calendar : public QObject, public CustomProperties,
                  public IncidenceBase::Observer
 {
     Q_OBJECT
 public:
     Calendar();
     Calendar(const QString &timeZoneId);
     virtual ~Calendar();
     Incidence * undoIncidence() { return mUndoIncidence; };
     bool undoDeleteIncidence();
     void deleteIncidence(Incidence *in);
     void resetTempSyncStat();
     void resetPilotStat(int id);
     /**
       Clears out the current calendar, freeing all used memory etc.
     */
     virtual void close() = 0;
     virtual void addCalendar( Calendar*  ) = 0;
     virtual bool addCalendarFile( QString name, int id ) = 0;
     virtual bool mergeCalendarFile( QString name ) = 0;
-    virtual Incidence* incidenceForUid( const QString& uid, bool doNotCheckDuplicates , bool enabledOnly = false  ) = 0;
+    virtual Incidence* incidenceForUid( const QString& uid, bool doNotCheckDuplicates , bool enabledOnly = false ,int * isDup = 0 ) = 0;
+    virtual Todo* todoForUid( const QString& uid, bool doNotCheckDuplicates = true, bool enabledOnly = false  ,int * isDup = 0) = 0;
     virtual void setSyncEventsReadOnly() = 0;
     virtual void setSyncEventsEnabled() = 0;
     virtual void stopAllTodos() = 0;
     virtual void clearUndo( Incidence * newUndo );
   
     /**
       Sync changes in memory to persistant storage.
     */
     virtual void save() = 0;
     virtual QPtrList<Event> getExternLastSyncEvents() = 0;
     virtual void removeSyncInfo( QString syncProfile) = 0; 
     virtual bool isSaving() { return false; }
 
     /**
       Return the owner of the calendar's full name.
     */
     const QString &getOwner() const;
     /**
       Set the owner of the calendar. Should be owner's full name.
     */
     void setOwner( const QString &os );
     /**
       Return the email address of the calendar owner.
     */
     const QString &getEmail();
     /**
       Set the email address of the calendar owner.
     */
     void setEmail( const QString & );
   
     /**
       Set time zone from a timezone string (e.g. -2:00)
     */
     void setTimeZone( const QString &tz );
     /**
       Set time zone from a minutes value (e.g. -60)
     */
     void setTimeZone( int tz );
     /**
       Return time zone as offest in minutes.
     */
     int getTimeZone() const;
     /**
       Compute an ISO 8601 format string from the time zone.
     */
     QString getTimeZoneStr() const;
     /**
       Set time zone id (see /usr/share/zoneinfo/zone.tab for list of legal
diff --git a/libkcal/calendarlocal.cpp b/libkcal/calendarlocal.cpp
index ad8ace3..980663f 100644
--- a/libkcal/calendarlocal.cpp
+++ b/libkcal/calendarlocal.cpp
@@ -35,141 +35,192 @@
 #include "exceptions.h"
 #include "incidence.h"
 #include "journal.h"
 #include "filestorage.h"
 #include "calfilter.h"
 
 #include "calendarlocal.h"
 
 // #ifndef DESKTOP_VERSION
 // #include <qtopia/alarmserver.h> 
 // #endif
 using namespace KCal;
 
 CalendarLocal::CalendarLocal()
   : Calendar()
 {
   init();
 }
 
 CalendarLocal::CalendarLocal(const QString &timeZoneId)
   : Calendar(timeZoneId)
 {
   init();
 }
 
 void CalendarLocal::init()
 {
     mNextAlarmIncidence = 0;
 }
 
 
 CalendarLocal::~CalendarLocal()
 {
     registerObserver( 0 );
     if ( mDeleteIncidencesOnClose )
         close();
 }
 bool CalendarLocal::mergeCalendarFile( QString name )
 {
     CalendarLocal calendar( timeZoneId() );
     calendar.setDefaultCalendar( 1 );
     if ( calendar.load( name ) ) {
         mergeCalendar( &calendar  );
         return true;
     }
     return false;
 }
  
-Incidence* CalendarLocal::incidenceForUid( const QString& uid , bool doNotCheckDuplicates, bool enabledOnly ) 
+Todo* CalendarLocal::todoForUid( const QString& uid, bool doNotCheckDuplicates, bool enabledOnly,int * isDup )
 {
+
+    int calID = 0;
+    if ( isDup  && *isDup > 0 )
+        calID = *isDup;
     Todo *todo;;
-    Incidence *retVal = 0;
+    Todo *retVal = 0;
     for ( todo = mTodoList.first(); todo; todo = mTodoList.next() ) {
         if ( todo->uid() == uid ) {
-            if ( enabledOnly )
-                if ( !todo->calEnabled() )
+            if( calID ) {
+                if ( todo->calID() != calID )
+                    continue;
+            }
+            else {
+                if ( enabledOnly ) {
+                    if ( !todo->calEnabled() ) {
+                        if ( isDup )
+                            *isDup = todo->calID();
                     continue;
+                    }
+                }
+            }
             if ( doNotCheckDuplicates ) return todo;
             if ( retVal ) {
                 if ( retVal->calID() > todo->calID() ) {
+                    if ( isDup )
+                        *isDup = retVal->calID();
                     retVal = todo;
                 }
             } else {
                 retVal = todo;
             }
         } 
     }
+    return retVal;
+} 
+//if ( isDup) and * isDup == 0: store duplicate found cal id in  isDup
+//if ( isDup) and * isDup > 0: search only in calendar with ID *isDup, ignore enabledOnly
+
+Incidence* CalendarLocal::incidenceForUid( const QString& uid , bool doNotCheckDuplicates, bool enabledOnly, int * isDup ) 
+{
+    int calID = 0;
+    if ( isDup  && *isDup > 0 )
+        calID = *isDup;
+    Incidence *retVal = todoForUid( uid , doNotCheckDuplicates,enabledOnly, isDup );
     if ( retVal ) return retVal;
     Event *event;
     for ( event = mEventList.first(); event; event = mEventList.next() ) {
         if (  event->uid() == uid ) {
-            if ( enabledOnly )
-                if ( !event->calEnabled() )
+            if( calID ) {
+                if ( event->calID() != calID )
                     continue;
+            }
+            else {
+                if ( enabledOnly ) {
+                    if ( !event->calEnabled() )  {
+                        if ( isDup )
+                            *isDup =event->calID() ;
+                        continue;
+                    }
+                }
+            }
             if ( doNotCheckDuplicates ) return event;
             if ( retVal ) {
                 if ( retVal->calID() > event->calID() ) {
+                    if ( isDup )
+                        *isDup = retVal->calID();
                     retVal = event;
                 }
             } else {
                 retVal = event;
             }
         }
     }
     if ( retVal ) return retVal;
     for ( Journal *it = mJournalList.first(); it; it = mJournalList.next() )
         if ( it->uid() == uid ) {
-            if ( enabledOnly )
-                if ( !it->calEnabled() )
+            if( calID ) {
+                if ( event->calID() != calID )
                     continue;
+            }
+            else {
+                if ( enabledOnly ) {
+                    if ( !it->calEnabled() ) {
+                        if ( isDup )
+                            *isDup = it->calID();
+                        continue;
+                    }
+                }
+            }
             if ( doNotCheckDuplicates ) return it;
             if ( retVal ) {
                 if ( retVal->calID() > it->calID() ) {
+                    if ( isDup )
+                        *isDup = retVal->calID();
                     retVal = it;
                 }
             } else {
                 retVal = it;
             }
         }
     return retVal;
 }
 
 bool CalendarLocal::mergeCalendar( Calendar* remote  )
 {
     // 1 look for raw inc in local
     //   if inc not in remote, delete in local
     // 2 look for raw inc in remote
     //   if inc in local, replace it
     //   if not in local, add it to default calendar
     QPtrList<Incidence> localInc = rawIncidences(); 
     Incidence* inL = localInc.first(); 
     while ( inL ) {
         if ( ! inL->isReadOnly () )
             if ( !remote->incidenceForUid( inL->uid(), true ))
                 deleteIncidence( inL );
         inL = localInc.next();
     }
     QPtrList<Incidence> er = remote->rawIncidences(); 
     Incidence* inR = er.first();
     while ( inR ) {
         inL = incidenceForUid( inR->uid(),false );
         if ( inL ) {
             if ( ! inL->isReadOnly () || inL->uid().left(15) == QString("last-syncEvent-") ) {
                 int calID = inL->calID();
                 deleteIncidence( inL );
                 inL = inR->clone();
                 inL->setCalID_block( calID );
                 addIncidence( inL );
             }
         } else {
             inL = inR->clone();
             inL->setCalID_block( 0 );// add to default cal
             addIncidence( inL );
         }
         inR = er.next();
     }
     return true;
 }
 
 
 bool CalendarLocal::addCalendarFile( QString name, int id )
@@ -188,101 +239,97 @@ void CalendarLocal::setSyncEventsEnabled()
     ev = mEventList.first();
     while ( ev ) {
         if ( ev->uid().left(15) == QString("last-syncEvent-") )
             ev->setCalEnabled( true );
         ev =  mEventList.next();
     } 
 }
 void CalendarLocal::setSyncEventsReadOnly()
 {
     Event * ev;
     ev = mEventList.first();
     while ( ev ) {
         if ( ev->uid().left(15) == QString("last-syncEvent-") ) {
             ev->setReadOnly( true ); 
         }
         ev =  mEventList.next();
     } 
 }
 
 void CalendarLocal::addCalendar( Calendar* cal )
 {
     cal->setDontDeleteIncidencesOnClose();
     setSyncEventsEnabled();
     {
         QPtrList<Event> EventList = cal->rawEvents();
         QPtrList<Event> el;
         Event * ev = EventList.first();
         while ( ev ) {
             if ( ev->uid().left( 15 ) == QString("last-syncEvent-") ) {
                 Event * se = event( ev->uid() );
                 if ( se )
                     el.append( se );    
                 ev->setCalID_block( 1 );
             }
             ev->unRegisterObserver( cal );
             ev->registerObserver( this );
             mEventList.append( ev );
             ev = EventList.next();
         }
          for ( ev = el.first(); ev; ev = el.next() ) {
            deleteIncidence ( ev );
         }
     }
     {
 
         QPtrList<Todo> TodoList = cal->rawTodos();
         Todo * ev = TodoList.first();
         while ( ev ) {
-            QString rel = ev->relatedToUid();
-            if ( !rel.isEmpty() ){
-                ev->setRelatedTo ( 0 );
-                ev->setRelatedToUid( rel );
-            }
+            ev->resetRelatedTo();
             ev = TodoList.next();
         }
         //TodoList = cal->rawTodos();
         ev = TodoList.first();
         while ( ev ) {
             ev->unRegisterObserver( cal );
             ev->registerObserver( this );
             mTodoList.append( ev );
             setupRelations( ev );
             ev = TodoList.next();
         }
     }
     {
         QPtrList<Journal> JournalList = cal->journals();
         Journal * ev = JournalList.first();
         while ( ev ) {
             ev->unRegisterObserver( cal );
             ev->registerObserver( this );
             mJournalList.append( ev );
             ev = JournalList.next();
         }
     }
     setModified( true );
 }
 bool CalendarLocal::load( const QString &fileName )
 {
   FileStorage storage( this, fileName );
   return storage.load();
 }
 
 bool CalendarLocal::save( const QString &fileName, CalFormat *format )
 {
   FileStorage storage( this, fileName, format );
   return storage.save();
 }
 
 void CalendarLocal::stopAllTodos()
 {
     for ( Todo *it = mTodoList.first(); it; it = mTodoList.next() )
         it->setRunning( false );
 
 }
 void CalendarLocal::close()
 {
 
   Todo * i;
   for( i = mTodoList.first(); i; i = mTodoList.next() ) i->setRunning(false);
 
@@ -367,103 +414,107 @@ void CalendarLocal::deleteEvent( Event *event )
 
 
 Event *CalendarLocal::event( const QString &uid )
 {
     Event *event;
     Event *retVal = 0;
     for ( event = mEventList.first(); event; event = mEventList.next() ) {
         if ( event->calEnabled() && event->uid() == uid ) {
             if ( retVal ) {
                 if ( retVal->calID() > event->calID() ) {
                     retVal = event;
                 }
             } else {
                 retVal = event;
             }
         }
     }
   return retVal;
 }
 bool CalendarLocal::addTodoNoDup( Todo *todo )
 {
   Todo * eve;
     for ( eve = mTodoList.first(); eve ; eve = mTodoList.next() ) {
         if ( *eve == *todo ) {
             //qDebug("duplicate todo found! not inserted! ");
             return false;
         }
     }
     return addTodo( todo );
 }
 bool CalendarLocal::addTodo( Todo *todo )
 {
   mTodoList.append( todo );
 
   todo->registerObserver( this );
 
   // Set up subtask relations
   setupRelations( todo );
 
   setModified( true );
   if ( todo->calID() == 0 )
   todo->setCalID_block( mDefaultCalendar );
   todo->setCalEnabled( true );
   return true;
 }
 
 void CalendarLocal::deleteTodo( Todo *todo )
 {
+    QString uid =  todo->uid();
   // Handle orphaned children
     removeRelations( todo );
     clearUndo(todo);
 
   if ( mTodoList.removeRef( todo ) ) {
     setModified( true );
   }
+   Todo* dup = todoForUid(  uid );
+   if ( dup )
+       setupRelations( dup );
 }
 
 QPtrList<Todo> CalendarLocal::rawTodos()
 {
     QPtrList<Todo> el;
     for ( Todo *it = mTodoList.first(); it; it = mTodoList.next() )
         if ( it->calEnabled() ) el.append( it );
     return el;
 }
 Todo *CalendarLocal::todo( QString syncProf, QString id )
 {
   Todo *todo;
   for ( todo = mTodoList.first(); todo; todo = mTodoList.next() ) {
       if ( todo->calEnabled() && todo->getID( syncProf ) == id ) return todo;
   }
 
   return 0;
 }
 void CalendarLocal::removeSyncInfo( QString syncProfile)
 {
     QPtrList<Incidence> all = rawIncidences() ;
     Incidence *inc;
     for ( inc = all.first(); inc; inc = all.next() ) {
         inc->removeID( syncProfile );
     }
     if ( syncProfile.isEmpty() ) {
         QPtrList<Event> el;
         Event *todo;
         for ( todo = mEventList.first(); todo; todo = mEventList.next() ) {
             if ( todo->uid().left( 15 ) == QString("last-syncEvent-") )
                     el.append( todo );
         }
         for ( todo = el.first(); todo; todo = el.next() ) {
            deleteIncidence ( todo );
         }
     } else {
         Event *lse = event( "last-syncEvent-"+ syncProfile);
         if ( lse )
             deleteIncidence ( lse );
     }
 }
 QPtrList<Event> CalendarLocal::getExternLastSyncEvents()
 {
     QPtrList<Event> el;
     Event *todo;
     for ( todo = mEventList.first(); todo; todo = mEventList.next() ) {
         if ( todo->uid().left( 15 ) == QString("last-syncEvent-") )
             if ( todo->summary().left(3) == "E: " )
diff --git a/libkcal/calendarlocal.h b/libkcal/calendarlocal.h
index b611704..1ceabce 100644
--- a/libkcal/calendarlocal.h
+++ b/libkcal/calendarlocal.h
@@ -2,97 +2,98 @@
     This file is part of libkcal.
 
     Copyright (c) 1998 Preston Brown
     Copyright (c) 2001,2003 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_CALENDARLOCAL_H
 #define KCAL_CALENDARLOCAL_H
 
 #include "calendar.h"
 
 namespace KCal {
 
 class CalFormat;
 
 /**
   This class provides a calendar stored as a local file.
 */
 class CalendarLocal : public Calendar
 {
   public:
     /**
       Constructs a new calendar, with variables initialized to sane values.
     */
     CalendarLocal();
     /**
       Constructs a new calendar, with variables initialized to sane values.
     */
     CalendarLocal( const QString &timeZoneId );
     ~CalendarLocal();
     void addCalendar( Calendar*  );
     bool addCalendarFile( QString name, int id );
     bool mergeCalendarFile( QString name );
     bool mergeCalendar( Calendar* cal );
-    Incidence* incidenceForUid( const QString& uid, bool doNotCheckDuplicates,  bool enabledOnly = false );
+    Incidence* incidenceForUid( const QString& uid, bool doNotCheckDuplicates,  bool enabledOnly = false,int * isDup = 0 );
+    Todo* todoForUid( const QString& uid, bool doNotCheckDuplicates = true, bool enabledOnly = false ,int * isDup = 0 );
     void setSyncEventsReadOnly();
     void setSyncEventsEnabled();
     void stopAllTodos();
     /**
       Loads a calendar on disk in vCalendar or iCalendar format into the current
       calendar. Any information already present is lost.
       @return true, if successfull, false on error.
       @param fileName the name of the calendar on disk.
     */
     bool load( const QString &fileName );
     /**
       Writes out the calendar to disk in the specified \a format.
       CalendarLocal takes ownership of the CalFormat object.
       @return true, if successfull, false on error.
       @param fileName the name of the file
     */
     bool save( const QString &fileName, CalFormat *format = 0 );
 
     /**
       Clears out the current calendar, freeing all used memory etc. etc.
     */
     void close();
 
     void save() {}
   
     /**
       Add Event to calendar.
     */
     void removeSyncInfo( QString syncProfile); 
     bool addAnniversaryNoDup( Event *event );
     bool addEventNoDup( Event *event );
     bool addEvent( Event *event );
     /** 
       Deletes an event from this calendar.
     */
     void deleteEvent( Event *event );
 
     /**
       Retrieves an event on the basis of the unique string ID.
     */
     Event *event( const QString &uid );
     /**
       Return unfiltered list of all events in calendar.
     */
     QPtrList<Event> rawEvents();
     QPtrList<Event> getExternLastSyncEvents();
     /**
       Add a todo to the todolist.
diff --git a/libkcal/incidence.cpp b/libkcal/incidence.cpp
index fe9f854..7dd9bd2 100644
--- a/libkcal/incidence.cpp
+++ b/libkcal/incidence.cpp
@@ -475,96 +475,102 @@ 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;
 }
 void Incidence::clearRelations()
 {
     mRelatedTo = 0;
     mRelations.clear();
 }
 QString Incidence::relatedToUid() const
 {
   return mRelatedToUid;
 }
+void Incidence::resetRelatedTo()
+{
+    QString store = mRelatedToUid;
+    setRelatedTo( 0 );
+    mRelatedToUid = store;
+}
 
 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();
   }
 }
diff --git a/libkcal/incidence.h b/libkcal/incidence.h
index dc49640..f89942f 100644
--- a/libkcal/incidence.h
+++ b/libkcal/incidence.h
@@ -128,96 +128,97 @@ class Incidence : public IncidenceBase
 
     /** 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);
+    void resetRelatedTo();
     /** 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;