view base/Command.h @ 1752:6d09d68165a4 by-id

Further review of ById: make IDs only available when adding a model to the ById store, not by querying the item directly. This means any id encountered in the wild must have been added to the store at some point (even if later released), which simplifies reasoning about lifecycles

/* -*- 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 SV_COMMAND_H
#define SV_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;

    void execute() override;
    void unexecute() override;

    QString getName() const override;
    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();

    QString getName() const override;
};

#endif