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authortpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-03-01 18:37:05 +0000
committertpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-03-01 18:37:05 +0000
commit145364a8af6a1fec06556221e66d4b724a62fc9a (patch)
tree53bd71a544008c518034f208d64c932dc2883f50 /src/document/BasicCommand.h
downloadrosegarden-145364a8af6a1fec06556221e66d4b724a62fc9a.tar.gz
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Added old abandoned KDE3 version of the RoseGarden MIDI tool
git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/rosegarden@1097595 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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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.
+*/
+
+#ifndef _RG_BASICCOMMAND_H_
+#define _RG_BASICCOMMAND_H_
+
+#include "base/Segment.h"
+#include <kcommand.h>
+#include "base/Event.h"
+#include "misc/Debug.h"
+
+class QString;
+
+
+namespace Rosegarden
+{
+
+
+
+/**
+ * BasicCommand is an abstract subclass of Command that manages undo,
+ * redo and notification of changes within a contiguous region of a
+ * single Rosegarden Segment, by brute force. When a subclass
+ * of BasicCommand executes, it stores a copy of the events that are
+ * modified by the command, ready to be restored verbatim on undo.
+ */
+
+class BasicCommand : public KNamedCommand
+{
+public:
+ virtual ~BasicCommand();
+
+ virtual void execute();
+ virtual void unexecute();
+
+ virtual Segment &getSegment();
+
+ timeT getStartTime() { return m_startTime; }
+ timeT getEndTime() { return m_endTime; }
+ virtual timeT getRelayoutEndTime();
+
+protected:
+ /**
+ * You should pass "bruteForceRedoRequired = true" if your
+ * subclass's implementation of modifySegment uses discrete
+ * event pointers or segment iterators to determine which
+ * events to modify, in which case it won't work when
+ * replayed for redo because the pointers may no longer be
+ * valid. In which case, BasicCommand will implement redo
+ * much like undo, and will only call your modifySegment
+ * the very first time the command object is executed.
+ *
+ * It is always safe to pass bruteForceRedoRequired true,
+ * it's just normally a waste of memory.
+ */
+ BasicCommand(const QString &name,
+ Segment &segment,
+ timeT start, timeT end,
+ bool bruteForceRedoRequired = false);
+
+ virtual void modifySegment() = 0;
+
+ virtual void beginExecute();
+
+private:
+ //--------------- Data members ---------------------------------
+
+ void copyTo(Segment *);
+ void copyFrom(Segment *);
+
+ timeT calculateStartTime(timeT given,
+ Segment &segment);
+ timeT calculateEndTime(timeT given,
+ Segment &segment);
+
+ timeT m_startTime;
+ timeT m_endTime;
+
+ Segment &m_segment;
+ Segment m_savedEvents;
+
+ bool m_doBruteForceRedo;
+ Segment *m_redoEvents;
+};
+
+
+
+}
+
+#endif