4 files changed, 29 insertions, 1 deletions

diff --git a/libkcal/incidence.cpp b/libkcal/incidence.cpp
index 39c14f5..fe9f854 100644
--- a/libkcal/incidence.cpp
+++ b/libkcal/incidence.cpp
@@ -342,6 +342,12 @@ void Incidence::setLastModifiedSubInvalid()
     if ( mRelatedTo )
         mRelatedTo->setLastModifiedSubInvalid();
 }
+QString Incidence::lastModifiedSubSortKey() const
+{
+    if ( mLastModifiedSubSortKey.isEmpty() )
+        return lastModifiedSortKey();
+    return mLastModifiedSubSortKey;
+}
 QDateTime Incidence::lastModifiedSub()
 {
     if ( !mRelations.count() )
@@ -355,6 +361,13 @@ QDateTime Incidence::lastModifiedSub()
         if ( inc->lastModifiedSub() > mLastModifiedSub )
             mLastModifiedSub = inc->lastModifiedSub();
     }
+    mLastModifiedSubSortKey.sprintf("%04d%02d%02d%02d%02d%02d",
+                                    mLastModifiedSub.date().year(),
+                                    mLastModifiedSub.date().month(),
+                                    mLastModifiedSub.date().day(),
+                                    mLastModifiedSub.time().hour(),
+                                    mLastModifiedSub.time().minute(),
+                                    mLastModifiedSub.time().second() );
     return mLastModifiedSub;
 }
 void Incidence::setCreated(QDateTime created)
diff --git a/libkcal/incidence.h b/libkcal/incidence.h
index eef9e64..dc49640 100644
--- a/libkcal/incidence.h
+++ b/libkcal/incidence.h
@@ -279,6 +279,7 @@ class Incidence : public IncidenceBase
     bool isBirthday() const;
     bool isAnniversary() const;
     QDateTime lastModifiedSub();
+    QString lastModifiedSubSortKey() const;
     QString recurrenceText() const;
     void setLastModifiedSubInvalid();
     
@@ -292,6 +293,7 @@ protected:
     bool mHasRecurrenceID;
   private:
     void checkCategories();
+    QString mLastModifiedSubSortKey;
     bool mHoliday, mBirthday, mAnniversary;
     int mRevision;
     bool mCancelled;
diff --git a/libkcal/incidencebase.cpp b/libkcal/incidencebase.cpp
index 022dead..cfef973 100644
--- a/libkcal/incidencebase.cpp
+++ b/libkcal/incidencebase.cpp
@@ -193,7 +193,7 @@ QString IncidenceBase::uid() const
 }
 void IncidenceBase::setLastModifiedSubInvalid()
 {
-
+    // virtual method
 }
 void IncidenceBase::setLastModified(const QDateTime &lm)
 {
@@ -201,9 +201,20 @@ void IncidenceBase::setLastModified(const QDateTime &lm)
   // DON'T! updated() because we call this from
   // Calendar::updateEvent().
   mLastModified = getEvenTime(lm);
+  mLastModifiedKey.sprintf("%04d%02d%02d%02d%02d%02d",
+                           mLastModified.date().year(),
+                           mLastModified.date().month(),
+                           mLastModified.date().day(),
+                           mLastModified.time().hour(),
+                           mLastModified.time().minute(),
+                           mLastModified.time().second() );
   setLastModifiedSubInvalid();
   //qDebug("IncidenceBase::setLastModified %s ",lm.toString().latin1());
 }
+QString IncidenceBase::lastModifiedSortKey() const
+{  
+    return mLastModifiedKey;
+}
 
 QDateTime IncidenceBase::lastModified() const
 {
diff --git a/libkcal/incidencebase.h b/libkcal/incidencebase.h
index 665c1f6..444d4c4 100644
--- a/libkcal/incidencebase.h
+++ b/libkcal/incidencebase.h
@@ -63,6 +63,7 @@ class IncidenceBase : public CustomProperties
     void setLastModified(const QDateTime &lm);
     /** Return the time the incidence was last modified. */
     QDateTime lastModified() const;
+    QString lastModifiedSortKey() const;
 
     /** sets the organizer for the event */
     void setOrganizer(const QString &o);
@@ -160,6 +161,7 @@ class IncidenceBase : public CustomProperties
   private:
     // base components
     QString mOrganizer;
+    QString mLastModifiedKey;
     QString mUid;
     int mCalID;
     bool mCalEnabled;