You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
3.1 KiB
110 lines
3.1 KiB
/*
|
|
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.
|
|
*/
|
|
|
|
#ifndef _RG_BASICCOMMAND_H_
|
|
#define _RG_BASICCOMMAND_H_
|
|
|
|
#include "base/Segment.h"
|
|
#include <kcommand.h>
|
|
#include "base/Event.h"
|
|
#include "misc/Debug.h"
|
|
|
|
class TQString;
|
|
|
|
|
|
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 TQString &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
|