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diff --git a/src/gui/editors/segment/TriggerManagerItem.cpp b/src/gui/editors/segment/TriggerManagerItem.cpp
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+++ b/src/gui/editors/segment/TriggerManagerItem.cpp
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+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <glaurent@telegraph-road.org>,
+        Chris Cannam        <cannam@all-day-breakfast.com>,
+        Richard Bown        <richard.bown@ferventsoftware.com>
+
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#include "TriggerManagerItem.h"
+
+namespace Rosegarden {
+
+int
+TriggerManagerItem::compare(QListViewItem * i, int col, bool ascending) const
+{
+    TriggerManagerItem *ei = 
+        dynamic_cast<TriggerManagerItem *>(i);
+
+    if (!ei) return QListViewItem::compare(i, col, ascending);
+
+    // col 0 -> index -- numeric compare
+    // col 1 -> ID -- numeric compare
+    // col 2 -> label -- default string compare
+    // col 3 -> duration -- raw duration compare
+    // col 4 -> base pitch -- pitch compare
+    // col 5 -> base velocity -- numeric compare
+    // col 6 -> usage count -- numeric compare
+    //
+    if (col == 2) {  
+        return QListViewItem::compare(i, col, ascending);
+    } else if (col == 3) {
+        if (m_rawDuration < ei->getRawDuration()) return -1;
+        else if (ei->getRawDuration() < m_rawDuration) return 1;
+        else return 0;
+    } else if (col == 4) {
+        if (m_pitch < ei->getPitch()) return -1;
+        else if (ei->getPitch() < m_pitch) return 1;
+        else return 0;
+    } else {
+        return key(col, ascending).toInt() - i->key(col, ascending).toInt();
+    }
+}
+
+}