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/* -*- 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 <functional>
#include "Debug.h"
namespace sv {
class Command
{
public:
virtual ~Command() { }
virtual void execute() = 0;
virtual void unexecute() = 0;
virtual QString getName() const = 0;
};
/**
* GenericCommand is a Command that can be constructed directly using
* lambdas, without having to create a subclass. Best for commands
* invoked only in a single place, and where little state is involved.
*/
class GenericCommand : public Command
{
public:
GenericCommand(QString name,
std::function<void()> execute,
std::function<void()> unexecute) :
m_name(name),
m_execute(execute),
m_unexecute(unexecute),
m_onDelete([] {}) {
}
GenericCommand(QString name,
std::function<void()> execute,
std::function<void()> unexecute,
std::function<void()> onDelete) :
m_name(name),
m_execute(execute),
m_unexecute(unexecute),
m_onDelete(onDelete) {
}
virtual ~GenericCommand() {
m_onDelete();
}
QString getName() const override {
return m_name;
}
void execute() override {
m_execute();
}
void unexecute() override {
m_unexecute();
}
private:
QString m_name;
std::function<void()> m_execute;
std::function<void()> m_unexecute;
std::function<void()> m_onDelete;
};
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;
};
} // end namespace sv
#endif
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