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
@@ -344,2 +344,8 @@ void Incidence::setLastModifiedSubInvalid()
 }
+QString Incidence::lastModifiedSubSortKey() const
+{
+    if ( mLastModifiedSubSortKey.isEmpty() )
+        return lastModifiedSortKey();
+    return mLastModifiedSubSortKey;
+}
 QDateTime Incidence::lastModifiedSub()
@@ -357,2 +363,9 @@ QDateTime Incidence::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
@@ -281,2 +281,3 @@ class Incidence : public IncidenceBase
     QDateTime lastModifiedSub();
+    QString lastModifiedSubSortKey() const;
     QString recurrenceText() const;
@@ -294,2 +295,3 @@ protected:
     void checkCategories();
+    QString mLastModifiedSubSortKey;
     bool mHoliday, mBirthday, mAnniversary;
diff --git a/libkcal/incidencebase.cpp b/libkcal/incidencebase.cpp
index 022dead..cfef973 100644
--- a/libkcal/incidencebase.cpp
+++ b/libkcal/incidencebase.cpp
@@ -195,3 +195,3 @@ void IncidenceBase::setLastModifiedSubInvalid()
 {
-
+    // virtual method
 }
@@ -203,2 +203,9 @@ void IncidenceBase::setLastModified(const QDateTime &lm)
   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();
@@ -206,2 +213,6 @@ void IncidenceBase::setLastModified(const QDateTime &lm)
 }
+QString IncidenceBase::lastModifiedSortKey() const
+{  
+    return mLastModifiedKey;
+}
 
diff --git a/libkcal/incidencebase.h b/libkcal/incidencebase.h
index 665c1f6..444d4c4 100644
--- a/libkcal/incidencebase.h
+++ b/libkcal/incidencebase.h
@@ -65,2 +65,3 @@ class IncidenceBase : public CustomProperties
     QDateTime lastModified() const;
+    QString lastModifiedSortKey() const;
 
@@ -162,2 +163,3 @@ class IncidenceBase : public CustomProperties
     QString mOrganizer;
+    QString mLastModifiedKey;
     QString mUid;