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diff --git a/src/commands/segment/AddTriggerSegmentCommand.cpp b/src/commands/segment/AddTriggerSegmentCommand.cpp
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+++ b/src/commands/segment/AddTriggerSegmentCommand.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   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+ 
+    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 "AddTriggerSegmentCommand.h"
+
+#include <klocale.h>
+#include "base/Composition.h"
+#include "base/Segment.h"
+#include "base/TriggerSegment.h"
+#include "document/RosegardenGUIDoc.h"
+
+
+namespace Rosegarden
+{
+
+AddTriggerSegmentCommand::AddTriggerSegmentCommand(RosegardenGUIDoc *doc,
+        timeT duration,
+        int basePitch,
+        int baseVelocity) :
+        KNamedCommand(i18n("Add Triggered Segment")),
+        m_composition(&doc->getComposition()),
+        m_duration(duration),
+        m_basePitch(basePitch),
+        m_baseVelocity(baseVelocity),
+        m_id(0),
+        m_segment(0),
+        m_detached(false)
+{
+    // nothing else
+}
+
+AddTriggerSegmentCommand::~AddTriggerSegmentCommand()
+{
+    if (m_detached)
+        delete m_segment;
+}
+
+TriggerSegmentId
+AddTriggerSegmentCommand::getId() const
+{
+    return m_id;
+}
+
+void
+AddTriggerSegmentCommand::execute()
+{
+    if (m_segment) {
+        m_composition->addTriggerSegment(m_segment, m_id, m_basePitch, m_baseVelocity);
+    } else {
+        m_segment = new Segment();
+        m_segment->setEndMarkerTime(m_duration);
+        TriggerSegmentRec *rec = m_composition->addTriggerSegment
+                                 (m_segment, m_basePitch, m_baseVelocity);
+        if (rec)
+            m_id = rec->getId();
+    }
+    m_detached = false;
+}
+
+void
+AddTriggerSegmentCommand::unexecute()
+{
+    if (m_segment)
+        m_composition->detachTriggerSegment(m_id);
+    m_detached = true;
+}
+
+}