annotate base/Command.h @ 1008:d9e0e59a1581

When using an aggregate model to pass data to a transform, zero-pad the shorter input to the duration of the longer rather than truncating the longer. (This is better behaviour for e.g. MATCH, and in any case the code was previously truncating incorrectly and ending up with garbage data at the end.)

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    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 _COMMAND_H_
#define _COMMAND_H_

#include <QObject>
#include <QString>
#include <vector>

#include "Debug.h"

class Command
{
public:
    virtual ~Command() { }

    virtual void execute() = 0;
    virtual void unexecute() = 0;
    virtual QString getName() const = 0;
};

class MacroCommand : public Command
{
public:
    MacroCommand(QString name);
    virtual ~MacroCommand();

    virtual void addCommand(Command *command);
    virtual void deleteCommand(Command *command);
    virtual bool haveCommands() const;

    virtual void execute();
    virtual void unexecute();

    virtual QString getName() const;
    virtual void setName(QString name);

protected:
    QString m_name;
    std::vector<Command *> m_commands;
};

/**
 * BundleCommand is a MacroCommand whose name includes a note of how
 * many commands it contains.  It is a QObject with Q_OBJECT macro so
 * that it can do plural-sensitive translations.
 */
class BundleCommand : public QObject, public MacroCommand
{
    Q_OBJECT

public:
    BundleCommand(QString name);
    virtual ~BundleCommand();

    virtual QString getName() const;
};

#endif