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/* This file is part of the KDE project.
Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 or 3 of the License.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef QT_NO_DEBUG
#include <QTextStream>
#include <QWidget>
#include "objecttree.h"
QT_BEGIN_NAMESPACE
namespace ObjectTree
{
DepthFirstConstIterator::DepthFirstConstIterator()
: m_pointee(0)
{
}
DepthFirstConstIterator::DepthFirstConstIterator
(const QObject& root)
: m_pointee(&root)
{
}
DepthFirstConstIterator&
DepthFirstConstIterator::operator++()
{
const QObjectList& children = m_pointee->children();
if (children.count() == 0) {
backtrack();
}
else {
m_history.push(0);
m_pointee = children.first();
}
return *this;
}
void DepthFirstConstIterator::backtrack()
{
if (m_history.count()) {
const int index = m_history.top();
m_history.pop();
const QObjectList& siblings = m_pointee->parent()->children();
if (siblings.count() > index + 1) {
m_history.push(index + 1);
m_pointee = siblings[index + 1];
}
else {
m_pointee = m_pointee->parent();
backtrack();
}
}
else {
// Reached end of search
m_pointee = 0;
}
}
AncestorConstIterator::AncestorConstIterator()
{
}
AncestorConstIterator::AncestorConstIterator(const QObject& leaf)
{
m_ancestors.push(&leaf);
QObject* ancestor = leaf.parent();
while(ancestor)
{
m_ancestors.push(ancestor);
ancestor = ancestor->parent();
}
}
} // namespace ObjectTree
QT_END_NAMESPACE
#endif
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