VirtualBox

source: vbox/trunk/src/VBox/Frontends/VirtualBox/src/objects/UIExecutionQueue.h@ 103977

Last change on this file since 103977 was 98103, checked in by vboxsync, 23 months ago

Copyright year updates by scm.

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1/* $Id: UIExecutionQueue.h 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * VBox Qt GUI - UIExecutionQueue class declaration.
4 */
5
6/*
7 * Copyright (C) 2021-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * SPDX-License-Identifier: GPL-3.0-only
26 */
27
28#ifndef FEQT_INCLUDED_SRC_objects_UIExecutionQueue_h
29#define FEQT_INCLUDED_SRC_objects_UIExecutionQueue_h
30#ifndef RT_WITHOUT_PRAGMA_ONCE
31# pragma once
32#endif
33
34/* Qt includes: */
35#include <QObject>
36#include <QQueue>
37
38/** QObject subclass providing GUI with
39 * interface for an execution step. */
40class UIExecutionStep : public QObject
41{
42 Q_OBJECT;
43
44signals:
45
46 /** Notifies about step finished. */
47 void sigStepFinished();
48
49public:
50
51 /** Constructs execution step. */
52 UIExecutionStep();
53
54 /** Executes the step. */
55 virtual void exec() = 0;
56};
57
58/** QObject subclass providing GUI with
59 * an object to process queue of execution steps. */
60class UIExecutionQueue : public QObject
61{
62 Q_OBJECT;
63
64signals:
65
66 /** Starts the queue. */
67 void sigStartQueue();
68
69 /** Notifies about queue finished. */
70 void sigQueueFinished();
71
72public:
73
74 /** Constructs execution queue passing @a pParent to the base-class. */
75 UIExecutionQueue(QObject *pParent = 0);
76 /** Destructs execution queue. */
77 virtual ~UIExecutionQueue() /* override final */;
78
79 /** Enqueues pStep into queue. */
80 void enqueue(UIExecutionStep *pStep);
81
82 /** Starts the queue. */
83 void start() { emit sigStartQueue(); }
84
85private slots:
86
87 /** Starts subsequent step. */
88 void sltStartsSubsequentStep();
89
90private:
91
92 /** Holds the execution step queue. */
93 QQueue<UIExecutionStep*> m_queue;
94 /** Holds current step being executed. */
95 UIExecutionStep *m_pExecutedStep;
96};
97
98#endif /* !FEQT_INCLUDED_SRC_objects_UIExecutionQueue_h */
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