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
@@ -343,4 +343,10 @@ void Incidence::setLastModifiedSubInvalid()
         mRelatedTo->setLastModifiedSubInvalid();
 }
+QString Incidence::lastModifiedSubSortKey() const
+{
+    if ( mLastModifiedSubSortKey.isEmpty() )
+        return lastModifiedSortKey();
+    return mLastModifiedSubSortKey;
+}
 QDateTime Incidence::lastModifiedSub()
 {
@@ -356,4 +362,11 @@ QDateTime Incidence::lastModifiedSub()
             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;
 }
diff --git a/libkcal/incidence.h b/libkcal/incidence.h
index eef9e64..dc49640 100644
--- a/libkcal/incidence.h
+++ b/libkcal/incidence.h
@@ -280,4 +280,5 @@ class Incidence : public IncidenceBase
     bool isAnniversary() const;
     QDateTime lastModifiedSub();
+    QString lastModifiedSubSortKey() const;
     QString recurrenceText() const;
     void setLastModifiedSubInvalid();
@@ -293,4 +294,5 @@ protected:
   private:
     void checkCategories();
+    QString mLastModifiedSubSortKey;
     bool mHoliday, mBirthday, mAnniversary;
     int mRevision;
diff --git a/libkcal/incidencebase.cpp b/libkcal/incidencebase.cpp
index 022dead..cfef973 100644
--- a/libkcal/incidencebase.cpp
+++ b/libkcal/incidencebase.cpp
@@ -194,5 +194,5 @@ QString IncidenceBase::uid() const
 void IncidenceBase::setLastModifiedSubInvalid()
 {
-
+    // virtual method
 }
 void IncidenceBase::setLastModified(const QDateTime &lm)
@@ -202,7 +202,18 @@ void IncidenceBase::setLastModified(const QDateTime &lm)
   // 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
@@ -64,4 +64,5 @@ class IncidenceBase : public CustomProperties
     /** Return the time the incidence was last modified. */
     QDateTime lastModified() const;
+    QString lastModifiedSortKey() const;
 
     /** sets the organizer for the event */
@@ -161,4 +162,5 @@ class IncidenceBase : public CustomProperties
     // base components
     QString mOrganizer;
+    QString mLastModifiedKey;
     QString mUid;
     int mCalID;