| 1 | /* $Id: UIExecutionQueue.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox Qt GUI - UIExecutionQueue class implementation.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2021-2024 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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| 26 | */
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| 27 |
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| 28 | /* GUI includes: */
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| 29 | #include "UIExecutionQueue.h"
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| 30 |
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| 31 |
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| 32 | /*********************************************************************************************************************************
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| 33 | * Class UIExecutionStep implementation. *
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| 34 | *********************************************************************************************************************************/
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| 35 |
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| 36 | UIExecutionStep::UIExecutionStep()
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| 37 | {
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| 38 | }
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| 39 |
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| 40 |
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| 41 | /*********************************************************************************************************************************
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| 42 | * Class UIExecutionQueue implementation. *
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| 43 | *********************************************************************************************************************************/
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| 44 |
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| 45 | UIExecutionQueue::UIExecutionQueue(QObject *pParent /* = 0 */)
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| 46 | : QObject(pParent)
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| 47 | , m_pExecutedStep(0)
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| 48 | {
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| 49 | /* Listen for the queue start signal: */
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| 50 | connect(this, &UIExecutionQueue::sigStartQueue,
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| 51 | this, &UIExecutionQueue::sltStartsSubsequentStep,
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| 52 | Qt::QueuedConnection);
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| 53 | }
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| 54 |
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| 55 | UIExecutionQueue::~UIExecutionQueue()
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| 56 | {
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| 57 | /* Cleanup current step: */
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| 58 | delete m_pExecutedStep;
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| 59 | m_pExecutedStep = 0;
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| 60 |
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| 61 | /* Dequeue steps one-by-one: */
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| 62 | while (!m_queue.isEmpty())
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| 63 | delete m_queue.dequeue();
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| 64 | }
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| 65 |
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| 66 | void UIExecutionQueue::enqueue(UIExecutionStep *pUpdateStep)
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| 67 | {
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| 68 | m_queue.enqueue(pUpdateStep);
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| 69 | }
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| 70 |
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| 71 | void UIExecutionQueue::sltStartsSubsequentStep()
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| 72 | {
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| 73 | /* Cleanup current step: */
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| 74 | delete m_pExecutedStep;
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| 75 | m_pExecutedStep = 0;
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| 76 |
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| 77 | /* If queue is empty, we are finished: */
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| 78 | if (m_queue.isEmpty())
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| 79 | emit sigQueueFinished();
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| 80 | else
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| 81 | {
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| 82 | /* Otherwise dequeue first step and start it: */
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| 83 | m_pExecutedStep = m_queue.dequeue();
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| 84 | connect(m_pExecutedStep, &UIExecutionStep::sigStepFinished,
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| 85 | this, &UIExecutionQueue::sltStartsSubsequentStep,
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| 86 | Qt::QueuedConnection);
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| 87 | m_pExecutedStep->exec();
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| 88 | }
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| 89 | }
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