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diff --git a/src/commands/segment/DeleteTracksCommand.cpp b/src/commands/segment/DeleteTracksCommand.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 "DeleteTracksCommand.h"
+
+#include "misc/Debug.h"
+#include "base/Composition.h"
+#include "base/Segment.h"
+#include <qstring.h>
+
+
+namespace Rosegarden
+{
+
+DeleteTracksCommand::DeleteTracksCommand(Composition *composition,
+        std::vector<TrackId> tracks):
+        KNamedCommand(getGlobalName()),
+        m_composition(composition),
+        m_tracks(tracks),
+        m_detached(false)
+{}
+
+DeleteTracksCommand::~DeleteTracksCommand()
+{
+    if (m_detached) {
+        for (unsigned int i = 0; i < m_oldTracks.size(); ++i)
+            delete m_oldTracks[i];
+
+        for (unsigned int i = 0; i < m_oldSegments.size(); ++i)
+            delete m_oldSegments[i];
+
+        m_oldTracks.clear();
+        m_oldSegments.clear();
+    }
+}
+
+void DeleteTracksCommand::execute()
+{
+    Track *track = 0;
+    const Composition::segmentcontainer &segments =
+        m_composition->getSegments();
+
+    //cout << "DeleteTracksCommand::execute()" << endl;
+
+    m_oldSegments.clear();
+    m_oldTracks.clear();
+
+    // Remap positions and track numbers
+    //
+
+    Composition::trackiterator tit;
+    Composition::trackcontainer
+    &tracks = m_composition->getTracks();
+
+    for (unsigned int i = 0; i < m_tracks.size(); ++i) {
+        // detach segments and store tracks somewhere
+        track = m_composition->getTrackById(m_tracks[i]);
+
+        if (track) {
+            // detach all segments for that track
+            //
+            for (Composition::segmentcontainer::const_iterator
+                    it = segments.begin();
+                    it != segments.end(); ++it) {
+                if ((*it)->getTrack() == m_tracks[i]) {
+                    m_oldSegments.push_back(*it);
+                    m_composition->detachSegment(*it);
+                }
+            }
+
+            // store old tracks
+            m_oldTracks.push_back(track);
+            if (m_composition->detachTrack(track) == false) {
+                RG_DEBUG << "DeleteTracksCommand::execute - can't detach track" << endl;
+            }
+        }
+    }
+
+    std::vector<Track*>::iterator otIt;
+    for (otIt = m_oldTracks.begin(); otIt != m_oldTracks.end(); ++otIt) {
+        for (tit = tracks.begin(); tit != tracks.end(); ++tit) {
+            if ((*tit).second->getPosition() > (*otIt)->getPosition()) {
+                // If the track we've removed was after the current
+                // track then decrement the track position.
+                //
+                int newPosition = (*tit).second->getPosition() - 1;
+
+                (*tit).second->setPosition(newPosition);
+
+            }
+        }
+    }
+
+    m_detached = true;
+}
+
+void DeleteTracksCommand::unexecute()
+{
+    // Add the tracks and the segments back in
+    //
+
+    // Remap positions and track numbers
+    //
+    Composition::trackcontainer
+    &tracks = m_composition->getTracks();
+    Composition::trackiterator tit;
+
+    std::vector<Track*>::iterator otIt;
+    for (otIt = m_oldTracks.begin(); otIt != m_oldTracks.end(); ++otIt) {
+        // From the back we shuffle out the tracks to allow the new
+        // (old) track some space to come back in.
+        //
+        tit = tracks.end();
+        while (true) {
+            --tit;
+
+            if ((*tit).second->getPosition() >= (*otIt)->getPosition()) {
+                // If the track we're adding has position after the
+                // current track then increment position.
+                //
+                int newPosition = (*tit).second->getPosition() + 1;
+
+                (*tit).second->setPosition(newPosition);
+            }
+
+            if (tit == tracks.begin())
+                break;
+        }
+
+        m_composition->addTrack(*otIt);
+    }
+
+    for (unsigned int i = 0; i < m_oldSegments.size(); ++i)
+        m_composition->addSegment(m_oldSegments[i]);
+
+    m_detached = false;
+}
+
+}