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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick Layouts 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 "qlayoutpolicy_p.h"
#include <QtCore/qdebug.h>
#include <QtCore/qdatastream.h>
QT_BEGIN_NAMESPACE
void QLayoutPolicy::setControlType(ControlType type)
{
/*
The control type is a flag type, with values 0x1, 0x2, 0x4, 0x8, 0x10,
etc. In memory, we pack it onto the available bits (CTSize) in
setControlType(), and unpack it here.
Example:
0x00000001 maps to 0
0x00000002 maps to 1
0x00000004 maps to 2
0x00000008 maps to 3
etc.
*/
int i = 0;
while (true) {
if (type & (0x1 << i)) {
bits.ctype = i;
return;
}
++i;
}
}
QLayoutPolicy::ControlType QLayoutPolicy::controlType() const
{
return QLayoutPolicy::ControlType(1 << bits.ctype);
}
#ifndef QT_NO_DATASTREAM
/*!
\relates QLayoutPolicy
Writes the size \a policy to the data stream \a stream.
\sa{Serializing Qt Data Types}{Format of the QDataStream operators}
*/
QDataStream &operator<<(QDataStream &stream, const QLayoutPolicy &policy)
{
// The order here is for historical reasons. (compatibility with Qt4)
quint32 data = (policy.bits.horPolicy | // [0, 3]
policy.bits.verPolicy << 4 | // [4, 7]
policy.bits.hfw << 8 | // [8]
policy.bits.ctype << 9 | // [9, 13]
policy.bits.wfh << 14 | // [14]
//policy.bits.padding << 15 | // [15]
policy.bits.verStretch << 16 | // [16, 23]
policy.bits.horStretch << 24); // [24, 31]
return stream << data;
}
#define VALUE_OF_BITS(data, bitstart, bitcount) ((data >> bitstart) & ((1 << bitcount) -1))
/*!
\relates QLayoutPolicy
Reads the size \a policy from the data stream \a stream.
\sa{Serializing Qt Data Types}{Format of the QDataStream operators}
*/
QDataStream &operator>>(QDataStream &stream, QLayoutPolicy &policy)
{
quint32 data;
stream >> data;
policy.bits.horPolicy = VALUE_OF_BITS(data, 0, 4);
policy.bits.verPolicy = VALUE_OF_BITS(data, 4, 4);
policy.bits.hfw = VALUE_OF_BITS(data, 8, 1);
policy.bits.ctype = VALUE_OF_BITS(data, 9, 5);
policy.bits.wfh = VALUE_OF_BITS(data, 14, 1);
policy.bits.padding = 0;
policy.bits.verStretch = VALUE_OF_BITS(data, 16, 8);
policy.bits.horStretch = VALUE_OF_BITS(data, 24, 8);
return stream;
}
#endif // QT_NO_DATASTREAM
#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QLayoutPolicy &p)
{
QDebugStateSaver saver(dbg);
dbg.nospace() << "QLayoutPolicy(horizontalPolicy = " << p.horizontalPolicy()
<< ", verticalPolicy = " << p.verticalPolicy() << ')';
return dbg;
}
#endif
QT_END_NAMESPACE
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