3 files changed, 44 insertions, 2 deletions

diff --git a/libkcal/incidence.h b/libkcal/incidence.h
index 1807bc4..de2a381 100644
--- a/libkcal/incidence.h
+++ b/libkcal/incidence.h
@@ -267,4 +267,5 @@ class Incidence : public IncidenceBase
 protected:
     QPtrList<Alarm> mAlarms;
+    QPtrList<Incidence> mRelations;
   private:
     int mRevision;
@@ -278,5 +279,4 @@ protected:
     Incidence *mRelatedTo;
     QString mRelatedToUid;
-    QPtrList<Incidence> mRelations;
     DateList mExDates;
     QPtrList<Attachment> mAttachments;
diff --git a/libkcal/todo.cpp b/libkcal/todo.cpp
index 7f1de78..d81a68f 100644
--- a/libkcal/todo.cpp
+++ b/libkcal/todo.cpp
@@ -194,5 +194,35 @@ QString Todo::dtDueStr(bool shortfmt) const
   return KGlobal::locale()->formatDateTime(mDtDue, shortfmt);
 }
-
+// retval 0 : no found
+//        1 : due for date found
+//        2 : overdue for date found
+int Todo::hasDueSubTodoForDate( const QDate & date, bool checkSubtodos  )
+{
+    int retval = 0;
+    if ( isCompleted() )
+        return 0;
+    if ( hasDueDate() ) {
+        if ( dtDue().date() < date )
+            return 2;
+        // we do not return, because we may find an overdue sub todo
+        if ( dtDue().date() == date )
+            retval = 1;
+    }
+    if ( checkSubtodos ) {
+        Incidence *aTodo;
+        for (aTodo = mRelations.first(); aTodo; aTodo = mRelations.next()) {
+            int ret = ((Todo*)aTodo)->hasDueSubTodoForDate( date ,checkSubtodos );
+            if ( ret == 2 )
+                return 2;
+            if ( ret == 1)
+                retval = 1;
+        }
+    }
+    return retval;
+}
+int Todo::hasDueSubTodo( bool checkSubtodos  ) //= true
+{  
+    return hasDueSubTodoForDate(QDate::currentDate(), checkSubtodos );
+}
 bool Todo::hasDueDate() const
 {
diff --git a/libkcal/todo.h b/libkcal/todo.h
index 41f5841..137b252 100644
--- a/libkcal/todo.h
+++ b/libkcal/todo.h
@@ -63,4 +63,16 @@ class Todo : public Incidence
     void setHasDueDate(bool f);
 
+    /*
+      Looks for a subtodo (including itself ) which is not complete and is
+      - overdue, or
+      - due today.
+      It returns 0 for nothing found,
+      1 for found a todo which is due today and no overdue found
+      2 for found a overdue todo
+    */
+    int hasDueSubTodo( bool checkSubtodos = true );
+    /* same as above, but a specific date can be specified*/
+    int hasDueSubTodoForDate( const  QDate & date, bool checkSubtodos );
+
  
     /** sets the event's status to the string specified.  The string