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/* $Id$ */
/** @file
* VBox Qt GUI - UIExecutionQueue class declaration.
*/
/*
* Copyright (C) 2021-2022 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#ifndef FEQT_INCLUDED_SRC_objects_UIExecutionQueue_h
#define FEQT_INCLUDED_SRC_objects_UIExecutionQueue_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
/* Qt includes: */
#include <QObject>
#include <QQueue>
/** QObject subclass providing GUI with
* interface for an execution step. */
class UIExecutionStep : public QObject
{
Q_OBJECT;
signals:
/** Notifies about step finished. */
void sigStepFinished();
public:
/** Constructs execution step. */
UIExecutionStep();
/** Executes the step. */
virtual void exec() = 0;
};
/** QObject subclass providing GUI with
* an object to process queue of execution steps. */
class UIExecutionQueue : public QObject
{
Q_OBJECT;
signals:
/** Starts the queue. */
void sigStartQueue();
/** Notifies about queue finished. */
void sigQueueFinished();
public:
/** Constructs execution queue passing @a pParent to the base-class. */
UIExecutionQueue(QObject *pParent = 0);
/** Destructs execution queue. */
virtual ~UIExecutionQueue() /* override final */;
/** Enqueues pStep into queue. */
void enqueue(UIExecutionStep *pStep);
/** Starts the queue. */
void start() { emit sigStartQueue(); }
private slots:
/** Starts subsequent step. */
void sltStartsSubsequentStep();
private:
/** Holds the execution step queue. */
QQueue<UIExecutionStep*> m_queue;
/** Holds current step being executed. */
UIExecutionStep *m_pExecutedStep;
};
#endif /* !FEQT_INCLUDED_SRC_objects_UIExecutionQueue_h */
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