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
@@ -268,2 +268,3 @@ protected:
     QPtrList<Alarm> mAlarms;
+    QPtrList<Incidence> mRelations;
   private:
@@ -279,3 +280,2 @@ protected:
     QString mRelatedToUid;
-    QPtrList<Incidence> mRelations;
     DateList mExDates;
diff --git a/libkcal/todo.cpp b/libkcal/todo.cpp
index 7f1de78..d81a68f 100644
--- a/libkcal/todo.cpp
+++ b/libkcal/todo.cpp
@@ -195,3 +195,33 @@ QString Todo::dtDueStr(bool shortfmt) const
 }
-
+// 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
@@ -64,2 +64,14 @@ class Todo : public Incidence
 
+    /*
+      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 );
+