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/****************************************************************************
**
** Copyright (C) 2019 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "entityvisitor_p.h"
#include <Qt3DRender/private/managers_p.h>
#include <Qt3DRender/private/nodemanagers_p.h>
QT_USE_NAMESPACE
using namespace Qt3DRender::Render;
EntityVisitor::EntityVisitor(NodeManagers *manager)
: m_manager(manager)
, m_pruneDisabled(false)
{
}
EntityVisitor::~EntityVisitor() = default;
/*!
* \internal
*
* Override in derived class to do work on the current entity
*
* Return value (Continue, Prune, Stop) will affect traversal
*/
EntityVisitor::Operation EntityVisitor::visit(Entity *entity) {
// return false to stop traversal
if (!entity)
return Stop;
return Continue;
}
/*!
* \internal
*
* If true, disabled entities and all their children will be ignored
* during traversal
*
*/
bool EntityVisitor::pruneDisabled() const
{
return m_pruneDisabled;
}
void EntityVisitor::setPruneDisabled(bool pruneDisabled)
{
m_pruneDisabled = pruneDisabled;
}
/*!
* \internal
*
* Call on the root of the tree that should be traversed.
* Returns false if any visit resulted in Stop
*/
bool EntityVisitor::apply(Entity *root) {
if (!root)
return false;
if (m_pruneDisabled && !root->isEnabled())
return true;
const auto op = visit(root);
if (op == Stop)
return false;
if (op == Prune)
return true;
const auto childrenHandles = root->childrenHandles();
for (const HEntity &handle : childrenHandles) {
Entity *child = m_manager->renderNodesManager()->data(handle);
if (child != nullptr && !apply(child))
return false;
}
return true;
}
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