1 files changed, 85 insertions, 0 deletions
diff --git a/src/commands/segment/SegmentResizeFromStartCommand.cpp b/src/commands/segment/SegmentResizeFromStartCommand.cpp
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+++ b/src/commands/segment/SegmentResizeFromStartCommand.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 "SegmentResizeFromStartCommand.h"
+
+#include <klocale.h>
+#include "base/Event.h"
+#include "base/Segment.h"
+#include "document/BasicCommand.h"
+
+
+namespace Rosegarden
+{
+
+SegmentResizeFromStartCommand::SegmentResizeFromStartCommand(Segment *s,
+        timeT time) :
+        BasicCommand(i18n("Resize Segment"), *s,
+                     std::min(time, s->getStartTime()),
+                     std::max(time, s->getStartTime())),
+        m_segment(s),
+        m_oldStartTime(s->getStartTime()),
+        m_newStartTime(time)
+{
+    // nothing else
+}
+
+SegmentResizeFromStartCommand::~SegmentResizeFromStartCommand()
+{
+    // nothing
+}
+
+void
+SegmentResizeFromStartCommand::modifySegment()
+{
+    if (m_newStartTime < m_oldStartTime) {
+        m_segment->fillWithRests(m_newStartTime, m_oldStartTime);
+    } else {
+
+        for (Segment::iterator i = m_segment->begin();
+                m_segment->isBeforeEndMarker(i); ) {
+
+            Segment::iterator j = i;
+            ++j;
+
+            if ((*i)->getAbsoluteTime() >= m_newStartTime)
+                break;
+
+            if ((*i)->getAbsoluteTime() + (*i)->getDuration() <= m_newStartTime) {
+                m_segment->erase(i);
+            } else {
+                Event *e = new Event
+                           (**i, m_newStartTime,
+                            (*i)->getAbsoluteTime() + (*i)->getDuration() - m_newStartTime);
+                m_segment->erase(i);
+                m_segment->insert(e);
+            }
+
+            i = j;
+        }
+    }
+}
+
+}